More young adults are developing osteoarthritis – here’s how we can spot those at risk before the damage is done

Source: The Conversation – UK – By Atiqah Aziz, Senior Research Officer at the Tissue Engineering Unit (TEG), National Orthopaedic Centre of Excellence for Research & Learning (NOCERAL), Department of Orthopaedic Surgery, Faculty of Medicine, University of Malaya

New Africa/Shutterstock

Research suggests young, active people are increasingly being diagnosed with osteoarthritis at much earlier ages than many expect. I have seen its effects first-hand among my own friends. One, a keen marathon runner, developed stage 2 osteoarthritis in her mid-30s. Several well-known public figures, including Robbie Williams, Tiger Woods and Andy Murray, have also spoken openly about experiencing the condition relatively young.

Osteoarthritis is often dismissed as an inevitable consequence of ageing, but it can erode quality of life at any age. It can turn everyday activities such as walking, climbing stairs or exercising into painful challenges. More than 600 million people worldwide live with osteoarthritis, and its risk factors are varied. They include obesity, ageing, metabolic disorders, chronic inflammation, previous joint injury and repetitive mechanical stress.

For younger people, osteoarthritis can be particularly devastating. Pain and stiffness can limit physical activity during years when work, caregiving and family life are often most demanding. It can affect mental health, restrict career choices and reduce the ability to stay active, which in turn increases the risk of other long-term health conditions. Unlike older adults, younger patients may also face decades of managing symptoms and repeated treatments.

Osteoarthritis develops when the smooth cartilage that cushions joints gradually breaks down. Cartilage normally acts as a shock absorber, allowing bones to move smoothly over one another. As it wears away, joints lose this protection. Bone surfaces begin to rub together, leading to pain, stiffness and the grinding or crunching noises many people jokingly refer to until the discomfort becomes impossible to ignore.

The condition does not appear overnight. Osteoarthritis usually takes years, and often decades, to develop. Early symptoms are often subtle and easy to dismiss: mild knee pain after activity, stiffness that eases with movement, or discomfort that comes and goes. Many people delay seeking medical advice until pain becomes persistent and joint damage is already advanced.

At present, treatment focuses on managing symptoms rather than reversing the disease. This includes exercise therapy, pain relief and therapeutic injections.




Read more:
Joint pain or osteoarthritis? Why exercise should be your first line of treatment


These injections may include platelet-rich plasma, which is made from a concentrated portion of a patient’s own blood and contains growth factors thought to support tissue repair. Others use platelet-derived vesicles, tiny particles released by platelets that carry biological signals involved in inflammation and healing.

However, most evidence for vesicle-based approaches currently comes from animal studies, including rat models, and they are not yet used routinely in human clinical practice. Hyaluronic acid may also be injected. This is a gel-like substance naturally found in joint fluid that helps lubricate and cushion the joint.

These treatments aim to reduce pain or improve joint movement rather than repair damaged cartilage. For some people, they provide temporary relief. Ultimately, however, when joint damage becomes severe, total joint replacement may be the only remaining option.




Read more:
Do you have knee pain from osteoarthritis? You might not need surgery. Here’s what to try instead


But what if osteoarthritis could be detected much earlier, before pain and irreversible damage set in?

Early prevention and early intervention have the potential to reduce pain, preserve mobility and significantly lower healthcare costs. The challenge has always been identifying osteoarthritis early enough to act.

Early diagnosis

This is where emerging diagnostic technologies may eventually offer a breakthrough. Every chemical compound in the body has a unique molecular structure, and when analysed it produces a distinctive pattern known as a “spectral fingerprint”.

This fingerprint reflects the chemical composition of a sample, such as blood serum. In people with osteoarthritis, researchers have observed subtle changes in inflammation, metabolism and tissue turnover that may alter this chemical profile.

One way of studying these fingerprints is through a technique called attenuated total reflection Fourier-transform infrared spectroscopy. Despite the intimidating name, the principle is straightforward.

A small blood sample is exposed to infrared light, and the way that light is absorbed provides information about the types of molecules present. Changes in proteins, lipids and other biomolecules can leave measurable signatures, which researchers are investigating as potential indicators of osteoarthritis.

These approaches are still largely used in research settings and are not yet part of routine clinical care. Even at this early stage, this research is important because it may eventually allow osteoarthritis risk to be identified earlier, when lifestyle changes and targeted interventions are more likely to protect joint health.

By combining this approach with computational analysis, researchers can identify complex chemical patterns associated with disease. In practice, this means comparing blood samples from people with and without osteoarthritis and detecting differences that are invisible to the naked eye. Similar approaches can also be used with other laboratory techniques, including spectroscopy-based methods and molecular biology tools, to identify biomarkers linked to early joint disease.

This kind of early detection could transform how osteoarthritis is managed. Identifying risk before symptoms become severe would allow people to take action earlier, through targeted exercise, weight management, injury prevention and tailored treatment strategies.

Osteoarthritis does not have to mean decades of pain and limitation. By shifting the focus from late-stage treatment to early detection and prevention, it may be possible to change the trajectory of the disease and improve quality of life for millions of people worldwide.

The Conversation

Dr Atiqah Aziz work in Universiti Malaya, Malaysia. She is affiliated with Tissue engineering Group,TEG,National Orthopaedic Centre of Excellence for Research & Learning (NOCERAL),Department of Orthopaedic Surgery
Faculty of Medicine,Universiti Malaya, 50603 Kuala Lumpur, Malaysia.

ref. More young adults are developing osteoarthritis – here’s how we can spot those at risk before the damage is done – https://theconversation.com/more-young-adults-are-developing-osteoarthritis-heres-how-we-can-spot-those-at-risk-before-the-damage-is-done-274451

Japan’s rock star leader now has the political backing to push a bold agenda. Will she deliver?

Source: The Conversation – Global Perspectives – By Adam Simpson, Senior Lecturer in International Studies in the School of Society and Culture, Adelaide University

Japanese Prime Minister Sanae Takaichi has delivered her Liberal Democratic Party (LDP) a landslide victory in the parliamentary elections she called shortly after taking office.

Now that she has consolidated her power in Japan’s legislature (called the Diet), the big question is what she will do with it.

Since her ascent to the prime ministership in a parliamentary vote in October, the ultra conservative Takaichi has upended the normally staid Japanese political system.

She has connected with younger voters like no other Japanese leader in recent history with her savvy social media presence, iconic fashion sense and diplomatic flair. (In a literal rock-star moment, she showed off her drumming skills in a jam session with South Korea’s leader.)

Japanese Prime Minister Takaichi Sanae and South Korean President Lee Jae Myung on the drums together.

Takaichi has cannily taken advantage of the honeymoon phase of her leadership by calling a snap election to gain more power in the Diet before there’s a dip in her popularity.

However, voters will now expect to see a return on their investment, and Takaichi faces the much more daunting task of delivering on her promises. Improving living standards in a country with a rapidly shrinking workforce and ageing population without mass immigration will test her political skills much more than winning an election.

An unlikely election victory

Although Takaichi’s LDP has been in government for most of Japan’s post-war history, it has recently experienced a string of poor election results.

In 2024, it lost the lower house majority it held with its then-coalition partner, Komeito, after a series of corruption scandals. Then, last year, the coalition lost its majority in the upper house, leaving the government hanging by a thread.

The party began its remarkable turnaround following then-Prime Minister Shigeru Ishiba’s resignation in September in the wake of those electoral setbacks.

Many pre-election polls predicted a sizeable victory for the LDP and its new coalition partner, Nippon Ishin (the Japan Innovation Party). Takaichi also received a boost with an endorsement from US President Donald Trump. Although the Japanese public views Trump unfavourably, they also know the US is their ultimate security guarantor against China, in addition to Japan’s largest export destination.

Nevertheless, there were some doubts about whether Takaichi’s popularity, particularly among younger voters, would translate into votes.

In the end, her electoral gold dust rubbed off on the rest of her party. Despite freezing temperatures and record snow in places, the LDP has been comfortably returned to office with a vastly increased majority in the lower house. The coalition now has a two-thirds super-majority, which means she can override the upper house to push through her legislative agenda.

A more assertive posture on China?

Since becoming prime minister, the hawkish Takaichi has taken an assertive position towards China.

In November, she angered Beijing by saying Japan could intervene militarily to help protect Taiwan in the face of a potential Chinese invasion. This resulted in vicious Chinese attacks on Takaichi that continued into the new year.

While the Japanese public is divided over whether to come to Taiwan’s aid in any conflict with China, there is now strong support for Takaichi’s pledge to increase the defence budget to 2% of GDP by this March, two years ahead of schedule.

In December, the Cabinet approved a 9.4% increase in defence spending to achieve this objective, focusing on domestic production and advanced capabilities (cyber, space, long-range strikes).

In response to rising threats from China, North Korea and Russia, Takaichi’s government also plans to revise Japan’s core security and defence strategies this year.

Economic woes front and centre

As much as defence matters, Takaichi will ultimately be judged by the public when it comes to economic policy.

The public is increasingly concerned about rising inflation and stagnant wages leading to falling living standards.

A vivid illustration of this: the price of rice has doubled since 2024, hitting a new high last month. Public anger over rising rice prices even brought down the farm minister last year.

Inflation has been above the Bank of Japan’s 2% target for 45 straight months. And though nominal wages have recently picked up, real incomes have been decreasing for the last four years.

Takaichi has made tackling the cost of living a priority. She has vowed to suspend Japan’s 8% food tax for two years. And last year, her government announced a massive US$135 billion (A$192 billion) stimulus package, including subsidies for electricity and gas bills.

However, these policies will increase the government’s budget deficit, adding to the country’s already sky-high public debt levels.

And last month, Japanese government bond prices collapsed after Takaichi called the election, with the markets predicting a LDP win would result in looser fiscal policy and higher government debt.

The Bank of Japan is unlikely to intervene to support the bond market in any future crisis, which will leave the government with higher borrowing costs, further increasing public debt.

Japan also faces enormous challenges related to its shrinking population and workforce.

It is too early to know whether Takaichi has the answers to these challenges. But she now has the power, authority and freedom to boldly pursue her policy agenda. Now she will need to deliver the kind of change the electorate expects.

The Conversation

Adam Simpson does not work for, consult, own shares in or receive funding from any company or organisation that would benefit from this article, and has disclosed no relevant affiliations beyond their academic appointment.

ref. Japan’s rock star leader now has the political backing to push a bold agenda. Will she deliver? – https://theconversation.com/japans-rock-star-leader-now-has-the-political-backing-to-push-a-bold-agenda-will-she-deliver-274015

Why are new tea towels worse at drying dishes than older ones?

Source: The Conversation – Global Perspectives – By Rebecca Van Amber, Senior Lecturer in Fashion & Textiles, RMIT University

Anna Shvets/Pexels

There’s a peculiar ritual in many kitchens: reaching past the crisp, pristine tea towel hanging on the oven door to grab the threadbare, slightly greying one shoved in the drawer.

We all know that old faithful dries dishes better, even if we can’t quite explain why. It seems counter-intuitive – shouldn’t brand new towels, fresh from the packaging, outperform their worn-out predecessors?

Yet here we are, instinctively choosing the frayed over the fresh.

This isn’t just kitchen superstition. There’s genuine science behind why your tea towels actually improve with age, and understanding it might change how you think about all your household textiles.

The science of soaking it up

Tea towels are typically made from cotton or linen fibres, chosen specifically because these natural cellulose fibres are inherently hygroscopic, or water-loving.

But fibre type alone doesn’t determine how well your towel performs. A textile’s absorption is the result of a complex interplay between fibre, yarn, fabric structure, and any finishes applied during manufacturing.

Textiles absorb and hold water in two key places: within the fibre structure itself, and in the spaces between fibres and yarns. This is why fabric structure matters so much.

Think about bath towels – when was the last time you used a smooth, thin one? Bath towels are typically thick terry pile construction with lots of small loops on the surface. These loops dramatically increase surface area, allowing water to be easily wicked into the fabric.

Close-up of a multicoloured striped towel.
The loops on terry fabric are what makes bath towels so absorbent by trapping moisture in the fibres.
Lindsay Lyon/Unsplash

Tea towels come in various constructions: plain weave, twill weave, waffle cloth, or terry. Plain weave towels – the kind you see with printed designs – require a smooth surface for clean, crisp screen printing.

Waffle cloth, which looks exactly as its name suggests, has a three-dimensional texture that makes it incredibly effective. Like with terry towels, this structure increases surface area and enhances water absorption.

Why old beats new

So what makes your battered old tea towel superior to its pristine replacement? Three key factors are at play.

Silicone finishes. Many brand-new textiles arrive coated in silicone softeners that provide softness and wrinkle resistance, making them appealing on store shelves.

But here’s the catch: these same finishes are often water resistant. Your brand new tea towel may literally have a water-repellent coating. The fix is simple – always wash new tea towels in hot water before first use.

The impact of laundering. Fabrics undergo significant changes during their first several washes – typically up to six cycles. During manufacturing, whether knitted or woven, fabrics are held under tension. Washing causes the yarns to relax in what’s called “relaxation shrinkage”, reverting to their natural, tension-free state. Industry typically tolerates up to 5% shrinkage.

Here’s where it gets interesting: while your tea towel’s dimensions may shrink slightly, its mass stays the same, meaning the fabric becomes thicker and denser. In waffle weave towels, this shrinkage can make the three-dimensional texture more pronounced, increasing surface geometry and absorption. This phenomenon has been documented in terry bath towels, as well.

A slightly ratty waffle cloth towel on a counter.
The geometry of a waffle cloth makes it really absorbent.
022 873/Unsplash

Fabric ageing. Repeated washing and drying causes minor surface damage that actually improves performance. Small fibres gradually raise up from the fabric surface, creating a fluffier, “hairier” texture.

Really smooth tea towels aren’t very absorbent because water struggles to wet the surface – it can almost bead up due to the contact angle between water and the smooth fabric.

But as washing raises more fibres off the surface making a “rougher” textile, the contact angle decreases, making the fabric easier to wet. Waffle fabrics, with their irregular surfaces, are inherently more absorbent from the start due to favourable contact angles.

In short: washing leads to more surface texture, leading to better absorption.

Not just tea towels

The real revelation here isn’t just about tea towels – it’s about how we think about textiles in general.

That “worn in” feeling we associate with our favourite bath towels, tea towels and even bed linens isn’t just nostalgia. Many of our home textiles are genuinely performing better after repeated laundering, having shed their factory finishes and relaxed into their true structure.

So before you send your old tea towels off for recycling to replace with new ones, remember: those frayed edges and faded patterns represent months of your towel becoming exactly what it was meant to be.

And when you do buy new household textiles, wash them at least once before using to remove any residual finishes.

The Conversation

Rebecca Van Amber is a chartered member of The Textile Institute.

ref. Why are new tea towels worse at drying dishes than older ones? – https://theconversation.com/why-are-new-tea-towels-worse-at-drying-dishes-than-older-ones-271852

How watching videos of ICE violence affects our mental health

Source: The Conversation – Global Perspectives – By Larissa Hjorth, Professor of Mobile Media and Games., RMIT University

The recent murders of Minneapolis residents Alex Pretti and Renee Nicole Good are drawing renewed attention to the activities of United States Immigration and Customs Enforcement (ICE) agents.

While they are not the only people to have been killed by ICE agents, first-hand videos of the events of their death have made us all witness to the extreme violence being carried out in the US.

Multiple versions of the footage went viral globally, capturing the world’s palpable sense of injustice. These videos demonstrate how mobile media is transforming each of us into a new kind of witness to suffering.

We need to find new ways to process such collective trauma and channel it toward meaningful action.

Why some deaths grip the world

Every day, we are exposed to loss, grief and death through our mobile phones. The distance between the participant and the observer – between the mourner and the witness – collapses. This is what scholars call “affective witnessing”. The rise of social media, body cam technology and surveillance media have all driven this phenomenon.

As we watch viral footage of tragic events, the boundaries between the emotions of the recording witness and our own merge. We feel their grief in our bodies, and become witnesses by extension.

All witnessing is “affective” – meaning it stays in our bodies, hearts and minds. But there is a particular intensity that comes with mobile media witnessing, since our phones live in our pockets, in an especially intimate space we can’t always distance ourselves from.

Cultural studies scholar Judith Butler notes that in the case of war and violence, grief is not just personal – it’s social, cultural and political. Butler argues that when grief goes public (such as through social media), inequalities are magnified. Some losses become more visible and “grievable” than others.




Read more:
Images from Gaza have shocked the world – but the ‘spectacle of suffering’ is a double-edged sword


In recent years, we have increasingly witnessed through social media what death researcher Darcy Harris calls “political grief”.

Political grief encompasses the collective loss and mourning felt by communities facing systemic injustice (including non-death related). It can take the form of emotional, psychological and spiritual distress arising from certain events, policies, and ideologies.

All of the violent ICE incidents reported in the US are deeply embedded in a sense of political grief being felt across the world. They prompt the lingering question: “Is this the future of the world?”

From text messages to TikTok

From its outset, mobile media has played an important role in making political grief visible and providing systems for collective action.

From its 2G beginnings, mobile media has been used in “people power” political revolutions. For instance in 2001, text messaging was used in the Philippines to mobilise protesters to demand the removal of then president Joseph Estrada.

More recently, footage of the 2020 murder of George Floyd by the Minneapolis police had global ramifications. As cultural studies scholars Andrew Brooks and Michael Richardson note, the affected body of the Floyd witness who filmed the video represents

both the intensity of the event and the embodied experience of the witness, establishing a relation between the two.

Brooks and Richardson call this “embodied affective witnessing”, whereby the victim, the first-hand witness and their online audience all become implicated.

At the same time, mobile media can be a weapon when used by a state as a form of surveillance technology.

What do we do with what we can’t unsee?

In a space where the distance between mourner and witness is vanishing, digital “grief literacy” is needed.

Psychologist Lauren Breen and colleagues describe this as finding ways to identify and normalise respectful conversations about grief, mourning and loss that connect to hope and social change.

In the context of distressing ICE footage, this could look like

  • pausing before re-sharing graphic material, and considering who might be affected
  • seeking out safe spaces for processing political grief
  • channelling distress into tangible real-world action, such as contacting politicians, or supporting affected families.

We also need to understand that we all grieve differently. For two years, we have been investigating how everyday Australians explore grief, loss and mourning via mobile media.

Through interviews with mourners and field experts, we’ve encountered stories ranging from personal bereavement to collective non-death loss, such as ecological grief and political grief.

Many of the people we interviewed developed their own social media strategies to cope with loss on personal and collective scales.

Some chose not to share footage out of concern for their own wellbeing, respect for victims’ dignity, or due to scepticism over what positive real-world impact re-sharing would have.

Others engaged in thoughtful sharing to create spaces for understanding, hope and activism.

But sorting through these feelings shouldn’t fall entirely on individuals. Ultimately, we need better media grief literacy, and ways to hold complex public discussions that address how grief may be dealt with on both an individual and collective level.

The Conversation

Larissa Hjorth is an Australian Research Council Future Fellow (The Mourning After: Grief, witnessing and mobile media practices, FT220100552).

This research is funded by Larissa Hjorth’s Australian Research Council Future Fellowship, The Mourning After. Katrin Gerber is a Research Fellow on this study.

ref. How watching videos of ICE violence affects our mental health – https://theconversation.com/how-watching-videos-of-ice-violence-affects-our-mental-health-275217

When AI goes haywire: the case of the skyscraper and the slide trombone

Source: The Conversation – France – By Frédéric Prost, Maître de conférences en informatique, INSA Lyon – Université de Lyon

AI-generated images, in response to the prompt: “Draw me a skyscraper and a sliding trombone side-by-side so that I can appreciate their respective sizes” (left by ChatGPT, right by Gemini) CC BY

Artificial Intelligence (AI) is now part of our everyday life. It is perceived as “intelligence” and yet relies fundamentally on statistics. Its results are based on previously learned patterns in data. As soon as we move away from the subject matter it has learned, we’re faced with the fact that there isn’t much that is intelligent about it. A simple question, such as “Draw me a skyscraper and a sliding trombone side-by-side so that I can appreciate their respective sizes” will give you something like this (this image has been generated by Gemini):

This example was generated by Google’s model, Gemini, but generative AI dates back to the launch of ChatGPT in November 2022 and is in fact only three years old. The technology has changed the world and is unprecedented in its adoption rate. Currently, 800 million users rely on ChatGPT every week to complete various tasks, according to OpenAI. Note that the number of requests tanks during the school holidays. Even though it’s hard to get hold of precise figures, this goes to show how widespread AI usage has become. Around one in two students regularly uses AI.

AI: essential technology or a gimmick?

Three years is both long and short. It’s long in a field where technology is constantly changing, and short when it comes to social impacts. And while we’re only just starting to understand how to use AI, its place in society has yet to be defined – just as AI’s image in popular culture has yet to be established. We’re still wavering between extreme positions: AI is going to outsmart human beings or, on the contrary, it’s merely a useless piece of shiny technology.

Indeed, a new call to pause AI-related research has been issued amid fears of a superintelligent AI. Others promise the earth, with a recent piece calling on younger generations to drop higher education altogether, on the grounds that AI would obliterate university degrees.

AI’s learning limitations amount to a lack of common sense

Ever since generative AI became available, I have been conducting an experiment consisting of asking it to draw two very different objects and then checking out the result. The goal behind these prompts of mine has been to see how the model behaves once it departs from its learning zone. Typically, this looks like a prompt such as ‘Draw me a banana and an aircraft carrier side by side so that we can see the difference in size between the two objects’. This prompt using Mistral gives the following result:

Screenshot of a prompt and the image generated by Mistral AI.
Author provided

I have yet to find a model that produces a result that makes sense. The illustration at the start of the article perfectly captures how this type of AI works and its limitations. The fact that we are dealing with an image makes the system’s limits more tangible than if it were to generate a long text.

What is striking is the outcome’s lack of credibility. Even a 5-year-old toddler would be able to tell that it’s nonsense. It’s all the more shocking that it’s possible to have long complex conversations with the same AIs without the impression of dealing with a stupid machine. Incidentally, such AIs can pass the bar examination or interpret medical results (for example, identifying tumours on a scan) with greater precision than professionals.

Where does the mistake lie?

The first thing to note is that it’s tricky to know exactly what’s in front of us. Although AIs’ theoretical components are well known, a project such as Gemini – much like models such as ChatGPT, Grok, Mistral, Claude, etc. – is a lot more complicated than a simple Machine Learning Lifecycle (MLL) coupled with a diffusion model.

MML are AIs that have been trained on enormous amounts of text and generate a statistical representation of it. In short, the machine is trained to guess the word that will make the most sense from a statistical viewpoint, in response to other words (your prompt).

Diffusion models that are used to generate images work according to a different process. The process of diffusion is based on notions from thermodynamics: you take an image (or a soundtrack) and you add random noise (snow on a screen) until the image disappears. You then teach a neuronal network to reverse that process by presenting these images in the opposite order to the noise addition. This random aspect explains why the same prompt generates different images.

Another point to consider is that these prompts are constantly evolving, which explains why the same prompt will not produce the same results from one day to the next. Changes might be brought manually to singular cases in order to respond to user feedback, for example.

As a physician, I will thus simplify the problem and consider we’re dealing with a diffusion model. These models are trained on image-text pairs. It is therefore safe to assume that Gemini and Mistral models have been trained on dozens (or possibly hundreds) of thousands and images of skyscrapers (or aircraft carriers) on the one hand, and on a large mass of slide trombones on the other – typically, close-ups of slide trombones. It is very unlikely that these two objects are represented together in the learning material. Hence, the model doesn’t have a clue about these objects’ relative dimensions.

Models lack ‘understanding’

Such examples go to show how models have no internal representation or understanding of the world. The sentence ‘to compare their sizes’ proves that there is no understanding of what is written by machines. In fact, models have no internal representation of what “compare” means other than the texts in which the term has been used. Thus, any comparison between concepts that do not feature in the learning material will produce the same kinds of results as the illustrations given in the examples above. It will be less visible but just as ridiculous. For example, this interaction with Gemini: ‘Consider this simple question: “Was the day the United States was established a leap year or a normal year?”‘

When consulted with the prefix CoT (Chain of Thought, a recent development in LLMs whose purpose is to break down a complex question into a series of simpler sub-questions), the modern Gemini language model responded: “The United States was established in 1776. 1776 is divisible by 4, but it is not a century year (100 years), so it is a leap year. Therefore, the day the United States was established was in a normal year. ”

It is clear that the model applies the leap year rule correctly, thereby offering a good illustration of the CoT technique, but it draws the wrong conclusion in the final step. These models do not have a logical representation of the world, but only a statistical approach that constantly creates these types of glitches that may seem ‘off the mark’.

This realisation is all the more beneficial given that today, AI writes almost as many articles published on the Internet as humans. So don’t be surprised if you find yourself surprised when reading certain articles.


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The Conversation

Frédéric Prost ne travaille pas, ne conseille pas, ne possède pas de parts, ne reçoit pas de fonds d’une organisation qui pourrait tirer profit de cet article, et n’a déclaré aucune autre affiliation que son organisme de recherche.

ref. When AI goes haywire: the case of the skyscraper and the slide trombone – https://theconversation.com/when-ai-goes-haywire-the-case-of-the-skyscraper-and-the-slide-trombone-272763

Canada is losing track of its wild salmon — just when we need that knowledge most

Source: The Conversation – Canada – By Michael Price, Adjunct professor, Department of Biology, Simon Fraser University

Every year, Pacific salmon return from the ocean to the rivers and streams where they were born. These migrations nourish ecosystems, sustain Indigenous cultures and support fisheries that people across Western Canada rely on. Yet something essential has quietly eroded: Canada’s efforts to count wild salmon.

That loss of basic information matters. It becomes especially important at a time when major industrial decisions affecting salmon watersheds are being made more quickly, and with less ecological information than in the past.

Twenty years ago, Canada adopted its Wild Salmon Policy (WSP), a landmark commitment to conserve the genetic and geographic diversity of wild Pacific salmon. At its core was a simple promise: to regularly assess the health of distinct salmon populations so declines could be detected early, and recovery action taken when needed.

Our recent analysis of publicly reported monitoring data shows that this foundation is weakening. Since the WSP was introduced, the number of spawning populations counted each year has declined by roughly one-third, driven largely by the loss of high-quality surveys.

We now lack sufficient publicly available data on nearly half of Canada’s Pacific salmon populations to assess whether they are healthy or at risk. Among those that can be assessed in British Columbia, around 70 per cent are in decline.




Read more:
Habitat loss and over-exploitation are leading to a decline in salmon populations


Why monitoring matters

Counting salmon isn’t bureaucratic box-checking. Salmon are foundational to coastal ecosystems and communities, and spawner counts are one of the simplest and most reliable ways to assess population health.

These data inform researchers and fisheries managers whether populations are stable, declining or recovering, and they underpin difficult decisions: when fisheries must be closed to prevent further harm, or when sustainable openings can support food security and livelihoods.

Without consistent monitoring, managers are forced to make decisions with limited evidence. Warning signs can be missed, and fisheries or habitat degradation may continue while populations quietly decline.

And the timing couldn’t be worse. The erosion of monitoring is occurring just as pressures on salmon are intensifying.

Climate change is warming rivers, altering ocean food webs, increasing the frequency of floods and droughts and reshaping freshwater habitats across Western Canada. In a changing environment, monitoring is the only way to distinguish natural variability from sustained declines.

At the same time, Canada is moving to accelerate industrial development. Recent federal legislation allows faster approval of projects deemed to be in the “national interest.” This push for speed is occurring while federal capacity to monitor salmon ecosystems weakens.

While expediency may be appealing, it carries real environmental risks unless matched by corresponding investment in mitigation and monitoring. When development accelerates while monitoring declines, decisions are increasingly made without a clear picture of what is being put at risk — or how impacts will be detected and addressed once projects are under way.

Data collection needed

The decline in monitoring is not simply the result of shrinking budgets or unavoidable austerity. Over the past two decades, federal investments in other salmon-related programs — such as enhancement and aquaculture development — have consistently exceeded investments in policy targeting salmon conservation.

In 2021, the federal government committed a historic $647 million to salmon conservation through the Pacific Salmon Strategy Initiative. Yet the systematic rebuilding of monitoring programs — the basic data collection needed to assess population health — was not made a central funding priority.

The challenge is likely to intensify. Recent federal budgets have committed to significant cuts to Fisheries and Oceans Canada, the department responsible for fisheries oversight and environmental monitoring. This would likely further constrain the capacity to rebuild monitoring programs.

In plain terms, Canada has not invested in the collection of information needed to know whether conservation efforts are actually working — or where action is most urgently required.

What rebuilding monitoring would look like

Reversing the decline in salmon monitoring is achievable, and relatively inexpensive compared to the costs of recovery once populations collapse.

First, the monitoring infrastructure and systems that allow governments and communities to track salmon populations must be treated as essential public infrastructure.

Second, coverage matters as much as precision. Monitoring more populations consistently, even with imperfect counts, often provides better insight than highly precise estimates at a few sites. Data gaps are far more damaging than moderate uncertainty.

Third, Indigenous-led and community-based monitoring offers a powerful opportunity to rebuild capacity. Many Indigenous nations have deep knowledge of salmon systems and strong stewardship responsibilities. Supporting monitoring partnerships, while respecting Indigenous data governance, can expand coverage, strengthen legitimacy and provide economic opportunities in local communities.




Read more:
Learning from Indigenous knowledge holders on the state and future of wild Pacific salmon


Finally, if governments choose to fast-track major projects, they must strengthen, not weaken, baseline ecological monitoring in affected watersheds. Speed should not come at the expense of understanding.

Canada has a clear framework for conserving wild salmon in the Wild Salmon Policy, but its effectiveness is undermined by low investment in basic monitoring. Without consistent and representative data, it becomes impossible to know what populations are in trouble, whether conservation efforts are working or where action is most urgently needed.

In effect, we are increasingly managing salmon in the dark — with stark consequences for ecosystems, fisheries and communities. Rebuilding broad, representative, monitoring programs is a foundational step that Canada can take to safeguard wild salmon in a time of rapid environmental and industrial change.

If we stop counting salmon, we should not be surprised when they disappear — quietly.

The Conversation

Michael Price is affiliated with SkeenaWild Conservation Trust as the Director of Science, and Adjunct Professor in the Department of Biology at Simon Fraser University.

Jonathan Moore is the principal investigator of the Salmon Watersheds Lab.

ref. Canada is losing track of its wild salmon — just when we need that knowledge most – https://theconversation.com/canada-is-losing-track-of-its-wild-salmon-just-when-we-need-that-knowledge-most-273746

When Valentine’s Day forces a relationship reckoning

Source: The Conversation – Canada – By Emily Impett, Professor of Psychology, University of Toronto

For people who have been quietly struggling with doubts about their relationship, the weeks leading up to Valentine’s Day can feel fraught. As Feb. 14 approaches, questions that were once easy to sidestep often become harder to ignore.

In a study that tracked romantic couples over a year, relationships were about 2.5 times more likely to end during the two weeks surrounding Valentine’s Day than during the fall or spring. When researchers accounted for relationship length, prior relationship history and gender, the odds of a breakup during this window were more than five times higher.

At first glance, this timing may seem strange. Why would couples break up just before a holiday devoted to love, connection and commitment?

Other findings from this study reveal that the increase in breakups appeared only among couples who were already struggling, not among those who were stable or getting stronger.

A psychological turning point

These findings suggest that Valentine’s Day functions less like a wrecking ball and more like a spotlight.

For couples who have been struggling for months, Valentine’s Day can bring those feelings into sharper focus, forcing people to confront questions they may have been postponing: Are we happy? Are we moving forward? Is this relationship something I want to celebrate?

Psychologists refer to moments like Valentine’s Day as temporal landmarks: points that divide time into a psychological before and after. They prompt people to take stock of their lives and make decisions they have been postponing. Romantic relationships are no exception.

Rather than creating doubt, these dates tend to accelerate decisions that were already unfolding, turning private uncertainty into a sense that change is overdue.

The pressure to perform

Not all temporal landmarks carry the same emotional weight, however. Valentine’s Day is an unusually ritualized and commercialized landmark. Consumer research shows that the holiday tends to evoke polarized reactions — people are far more likely to either love or loathe Valentine’s Day than to feel neutral about it.

In the weeks leading up to the holiday, advertising, store displays and social media amplify expectations about what counts as love: gifts, effort, public displays and visible commitment. Taking part in the ritual signals commitment and investment in a shared future; opting out can invite questions or disappointment.

In this sense, Valentine’s Day does not just invite reflection — it demands a performance.

This helps explain why breakups often happen before Valentine’s Day rather than after. Ending a relationship afterward can feel deceptive, especially if gifts were exchanged or plans were made. Many people would rather leave than perform romance they no longer feel, or accept gestures that imply a level of commitment they are unsure they can sustain.

That timing reflects a broader tendency to delay difficult decisions around holidays. Ending a relationship is emotionally uncomfortable at the best of times, and research shows people sometimes delay breakups to spare their partner pain. Holidays can intensify that hesitation.

In a nationally representative survey, 22 per cent of American adults said they ended relationships before Valentine’s Day because they did not want their partner to buy them gifts or spend money when they already knew the relationship was ending.

Uncertainty becomes impossible to ignore

The sense of being torn — wanting to avoid hurting a partner while also feeling unable to keep pretending — reflects a state psychologists call ambivalence.

Ambivalence is not indifference; it is the uncomfortable experience of holding competing motivations and emotions at the same time. Many people feel ambivalent long before a relationship ends, even in relationships that look stable from the outside. Research shows that this kind of internal conflict predicts lower satisfaction and greater instability over time.

Valentine’s Day intensifies ambivalence because it transforms private uncertainty into public signalling. Participating in the holiday sends a message that a relationship is intact and future-oriented. Dinner reservations, office flower deliveries and social media posts all carry symbolic weight.

Social comparison can add fuel to the fire. Valentine’s Day makes other people’s relationships unusually visible, often in idealized form. Couples appear everywhere — online and offline — celebrating love with carefully curated gestures. Decades of relationship research show that commitment is shaped not only by how satisfying a relationship is, but by how it compares to expectations and perceived alternatives.

When Valentine’s Day raises the bar for what love is supposed to look like, a relationship already marked by ambivalence can suddenly feel inadequate by contrast.

Not everyone experiences this pressure in the same way. Research shows that people who are uncomfortable with emotional closeness or public displays of romance often find Valentine’s Day especially stressful, which can amplify dissatisfaction and make withdrawal more likely.

Valentine’s Day rarely ends relationships on its own, of course. But it can make months of uncertainty suddenly very real, turning private doubts into decisions that feel urgent and unavoidable.

The Conversation

Emily Impett receives funding from the Social Sciences and Humanities Research Council of Canada.

ref. When Valentine’s Day forces a relationship reckoning – https://theconversation.com/when-valentines-day-forces-a-relationship-reckoning-274898

Northern housing must be built as an integrated ecosystem — by the North, for the North

Source: The Conversation – Canada – By Shelagh McCartney, Professor, Urban and Regional Planning, Toronto Metropolitan University

The recently launched Build Canada Homes (BCH) initiative marks the federal government’s most ambitious effort to build affordable homes since the Second World War.

The $13 billion initiative promises a building surge to emulate Canada’s post-war national housing program by doubling the national output of housing.




Read more:
Canada is a suburban nation because of post-Second World War government policy


This effort to aggressively stimulate growth in Canadian affordable housing construction includes the creation of the BCH new national agency working as a developer, rapid construction on public land, innovative modular construction methods and partnerships with private capital to push the pace.

For many Canadians, this may seem like a decisive response to the country’s housing crisis while also promoting Canadian sovereignty during tumultuous relations with the United States and other geopolitical developments.

But for the North, the parallels between the role of housing policy now and in the post-war era should give us pause. The building boom following the Second World War established many of the chronic housing, health and economic challenges northerners face today.

Lessons from the post-war era

Amid Cold War tensions and fears of Soviet encroachment following the Second World War, Canada and the United States moved to militarize and secure the Arctic.

Both countries established weather stations, the Distant Early Warning Line, airbases and other strategic infrastructure to assert sovereignty over the region. This geopolitical anxiety also fuelled Canadian efforts to create or expand permanent northern settlements.

These efforts imposed fixed communities on Indigenous peoples who previously moved seasonally through vast territories in patterns shaped by ecological knowledge and deep relationships with the land. This was often pursued through forced or incentivized relocations, reshaping Indigenous mobility and ways of life.

This push to secure the North was accompanied by a rapid expansion of federal housing initiatives in the 1950s and ‘60s to meet national housing strategies. Southern-style houses were imported into the North, detached from northern cultures, landscapes and climates, and administered through colonial governance structures.

Construction of these homes relied on southern labour and materials, leaving communities with buildings but not the authority, tools or training needed to construct or maintain them. Rather than recognize and learn from the approaches to housing construction and sustainability that northern, Indigenous peoples had been practising for generations, the government sought to impose control and authority through northern housing.

This era laid the groundwork for the housing precarity that northerners continue to feel today. Yet BCH uses the same language and approach — framing housing issues as a crisis, advocating rapid deployment, standardized technologies, reliance on southern supply chains and a short-term time frame. This undermines northerners’ abilities to self-determine and direct their own sustainable housing systems.

A different approach required

The North of 2026 is not the North of 1950. Climate change is accelerating permafrost thaw, reshaping ecosystems and exposing structural vulnerabilities in buildings and infrastructure caused by southern construction methods.

Dependence on imported materials and southern labour is even more unsustainable. Simultaneously, Indigenous Peoples across the North have developed community-led housing strategies, design innovations and governance models that offer powerful alternatives.

A Northern Housing Ecosystem (NHE) approach re-imagines northern housing not as a one-off construction campaign but as an interconnected system involving governance, economy, design, training, maintenance and social well-being.

It aligns with Indigenous-led housing innovations already underway — from the work of the K’asho Got’ine Housing Society and Yellowknives Dene First Nation, to regional training and design initiatives across the North.

The NHE asserts that housing is tied to health, education, economic development, energy use and cultural vitality. Housing cannot be governed within silos; it must be part of a living system.

To support northern housing autonomy and sustainability, BCH must adopt principles rooted in this ecosystem approach.

Principles include promotion of a northern housing economy where housing is collective infrastructure that focuses on community well-being and a sense of home for all northerners, prioritized over a market-based logic.

This fosters housing autonomy via northern and Indigenous control over governance, design, construction, repair and maintenance — the opposite of the dependency system of the post-war era.




Read more:
Housing is health: Coronavirus highlights the dangers of the housing crisis in Canada’s North


A sustainable northern housing future

The foundational question should no longer be: How many houses can we deliver quickly? Instead, it must be: How can we build a sustainable northern housing future?

This requires structural change in housing delivery. Short-term federal funding cycles and crisis-framing create pressure to spend and build quickly. That results in prioritizing communities with more administrative capacity, risks reinforcing inequities and rushes decisions that compromise sustainability.

Without concrete efforts to right the wrongs of the past, BCH will reproduce a housing system that never adequately or sustainably served the North. While BCH represents a major federal investment, the North needs more than housing units. It needs autonomy, climate-appropriate design, skilled local labour and local business development.

A sustainable northern housing future is possible, but only if programs like BCH evolve from a fast unit-counting exercise into an ecosystem-based strategy rooted in Indigenous leadership and northern expertise. That way a northern housing system can be built that will sustain communities for generations — by the North, with the North and for the North.


Mylène Riva, Associate Professor, Department of Geography, McGill University, Canada Research Chair in Housing, Community and Health and Rebecca Schiff, professor at the University of Lethbridge, co-authored this piece.

The Conversation

Shelagh McCartney receives funding from the Social Sciences and Humanities Research Council of Canada and the Canada Mortgage and Housing Corporation.

Aimee Pugsley receives funding from the Canada Mortgage and Housing Corporation and the Social Sciences and Humanities Research Council of Canada.

Julia Christensen receives funding from the Canada Mortgage and Housing Corporation and the Social Sciences and Humanities Research Council of Canada.

ref. Northern housing must be built as an integrated ecosystem — by the North, for the North – https://theconversation.com/northern-housing-must-be-built-as-an-integrated-ecosystem-by-the-north-for-the-north-273789

Imagining alternative Canadian cultural policy through BIPOC artists’ experiences

Source: The Conversation – Canada – By Taiwo Afolabi, Full Professor/CRC in Socially Engaged Theatre; Director, C-SET, University of Regina

We need arts and cultural policy that embeds foundational principles of care, accountability and attention to reciprocal and equitable relationships. (Peqsels/RDNE Stock project)

The culture and creative sector is experiencing unprecedented strain during a period defined by intense polarization and precarity, growing economic and environmental concerns, deepening social inequities and urgent calls for justice.

During the pandemic and amid powerful global movements for racial and social justice, longstanding inequities in the arts sector were brought into sharper focus — as was artists’ continued commitment to imagining alternative futures.

But the frameworks guiding Canadian arts and culture policy are increasingly insufficient to sustain our society.

Future of Canadian cultural policy

The future of Canadian cultural policy — shaping how artists and creative practitioners engage in their work, with each other and society at large — cannot solely be premised on the economic argument for the cultural and creative sector, as was assumed by the 2017 Creative Canada Policy Framework.

Assuming the primacy of economic returns and market performance in cultural production undermines the value of non-commodified, non-economic contributions of culture.

Nor can the future of Canadian cultural policy rest on nation-building narratives of the post-Second World War era.

As playwright and director Yvette Nolan and cultural strategist Sarah Garton Stanley discussed in a 2023 session with the Centre for Socially Engaged Theatre, such narratives marginalize Indigenous Peoples and other cultural identities and perpetuate a settler-colonial vision of cultural citizenship.

Yvette Nolan and Sarah Garton Stanley discuss the imprint of the 1951 Massey Report, concerned with arts and culture, on Canada’s creative sectors.

In addition to asking how culture can serve economic interests or reinforce a cohesive national brand, we must also ask: how can cultural policy nurture trust, belonging and long-term relationality across communities, identities and experiences?

This was our concern in research we conducted between 2022 and 2024 with 18 self-employed Black, Indigenous and People of Colour (BIPOC) artists and cultural entrepreneurs across Western Canada. Collaborators in this research were playwright Yvette Nolan, as well as art historian Luba Kozak and academic researcher Fonon Nunghe.

Conversations with artists

We explored the question: In what ways might the social value-creation strategies of self-employed BIPOC artists who engage in socially transformative practices shape a more equitable Canadian cultural policy?

Through individual and group conversations, we heard how artists are leveraging their creative practices, entrepreneurial skills and leadership to generate social value in their communities.

We also heard how they are countering discrimination, fostering belonging and advancing justice through culturally grounded, socially engaged art.

We conducted this research during a pivotal period in the wake of the COVID-19 pandemic and amid powerful global movements for racial and social justice. The reflections gathered are rooted in the social, political and cultural dynamics of that time, yet they remain relevant in today’s shifting landscape.

Issues such as systemic exclusion, under-representation and the need to support BIPOC leadership in the arts continue to demand urgent attention.

Erosion of EDI

Globally, the erosion of equity-based initiatives, especially in the wake of the 2024 U.S. presidential election, has raised alarm.

The backlash against diversity, equity and inclusion (DEI) efforts across sectors, including the arts, signals a broader populist shift that threatens the fragile gains made in justice-centred work. Canadian cultural institutions are not immune to this trend.




Read more:
We need meaningful, not less, EDI and climate action in turbulent times


Organizations that foreground equity and representation increasingly find themselves under scrutiny, pressured to defend their legitimacy and impact.

Cultural policy is needed that protects equity-driven practices and embeds care, accountability and relationality as foundational principles, especially in times of political volatility.

What does this look like on the ground? Here are three insights that emerged in our conversations with artists:

1. Authentic safe spaces and responsiveness: Artists emphasized that the concept of safety must go beyond institutional declarations of “safe spaces” or symbolic gestures. True safety for BIPOC artists requires culturally responsive policies that acknowledge the emotional, spiritual and cultural dimensions of artistic practice.

This might look different for different artists and communities. Many institutions, while professing inclusivity, continue to restrict practices revealing a limited understanding of cultural protocols. Artists shared that safety must be rooted in the ability to engage in arts production and express themselves authentically, without institutional gatekeeping or pressure to conform to Western norms. This calls for a systemic rethinking of safety that centres cultural sovereignty and the right to self-determined artistic expression.

A group of Black and racialized co-workers of varying genders having a meeting.
BIPOC artists are often exptected to take on dual roles of creating their own work while also educating institutions about cultural practices and histories.
(Gender Spectrum Collection), CC BY

2. Tokenism and decolonization: Many participants described being invited into institutional spaces as symbols rather than equal collaborators. This dynamic reduces cultural presence to a token, where inclusion is more about optics than genuine engagement. BIPOC artists are often expected to take on dual roles, creating their own work while also educating institutions about cultural practices and histories.

This expectation is not only unsustainable but emotionally exhausting, eroding trust over time. As one artist explained, they are there to tell stories, not to “do the work” of decolonization for institutions. Promises of change are frequently postponed, using excuses such as budget limitations or declining audiences, which can feel dismissive and discourage long-term engagement. These experiences underscore the need to move beyond performative inclusion and toward real power-sharing in decision-making, leadership and representation.

3. Relational accountability and community-based practices: True decolonial work requires relational accountability and the commitment to building respectful, sustained relationships rooted in reciprocity. This cannot be achieved through a checklist-style inclusion efforts or standard contracts. Many artists noted the lack of cultural and relational competency within institutions and highlighted the importance of nurturing trust through shared experiences, dialogue and time.




Read more:
How theatre on the Prairies can imagine an equitable and inclusive future


Community-based artistic practice often blurs the boundaries between personal and professional life, which institutions typically fail to recognize. Care responsibilities, emotional labour and deep ties to community are integral to the creative process for many artists, especially those working in post-COVID contexts.

However, hierarchical institutions that prioritize production and efficiency often undervalue relationships. One participant reflected on feeling torn between her commitment to her urban Indigenous community and institutional pressures focused on outputs. This tension highlights the urgent need for institutional models that respect and integrate relational and community-based approaches to art processes.

Reimagining how institutions define success

What’s needed for the new era in Canada’s arts landscape is a fundamental reimagining of how cultural institutions define success and responsibility. This shift calls for cultural policy that upholds the diverse realities of those who live, create and contribute across these lands and is grounded in their experiences.

Cultural policies must explicitly encourage and require institutions to prioritize care, trust and ethical leadership in their daily practices, instead of focusing solely on outputs and compliance. Policies should centre community and accountability to relationships as core to institutional purpose.

By embedding these values into funding criteria, accountability measures, success indicators and governance frameworks, cultural policy can compel institutions to move beyond short-term, project-based transactional models.

If we are to cultivate a truly inclusive cultural landscape, we must build equity not only in visibility and representation but also in the relationships, processes and structures that sustain cultural life.

Only by embracing this approach can cultural institutions foster trust, belonging and resilience, helping to heal and connect communities across this land.

The Conversation

The researchers/authors received funding from the Social Sciences and Humanities Council (SSHRC) (Insight Development Grant) for this research.

ref. Imagining alternative Canadian cultural policy through BIPOC artists’ experiences – https://theconversation.com/imagining-alternative-canadian-cultural-policy-through-bipoc-artists-experiences-273159

What to do if someone’s choking: Evidence says begin with back blows

Source: The Conversation – Canada – By Cody Dunne, Emergency Medicine Physician and PhD Candidate, University of Calgary

Eating is a social event. Whether it’s a night out with friends or an evening at home enjoying family dinner, conversation goes well with food. But what if, in the middle of laughter and big bites, someone suddenly began to choke? Would you know what to do?

Choking is a life-threatening emergency that requires immediate recognition and action to prevent rapid loss of consciousness, respiratory arrest and death. The actions of bystanders are often a major factor in the outcome of a choking incident. If the airway obstruction is not cleared before paramedics arrive, the risk of death is 42 per cent higher than if bystanders successfully remove it.

While choking can happen to anyone at any time, certain people are at higher risk, including people with neurological conditions that affect swallowing or chewing (such as dementia, stroke or Parkinson’s disease), people intoxicated by alcohol, drugs or medications or young children with small objects.

Despite choking being an emergency, until recently there has been limited high-quality evidence to guide bystanders on the most effective way to help. Techniques like abdominal thrusts (formerly known as the Heimlich maneuver), back blows and chest compressions or thrusts have existed since the mid-1900s but, until recently, recommendations were largely based on case reports rather than rigorous scientific data. This evidence gap is dangerous.

Bystander response is the primary driver of a choking person’s outcome, so ensuring people know the safest and most effective way to care for a choking person can save lives.

Back blows outperform abdominal thrusts and chest thrusts

Our research team — a collaboration of Canadian researchers, physicians and paramedics — investigated a large cohort of choking patients in the province of Alberta and looked at the effectiveness and safety of different choking techniques.

We found that back blows cleared the obstruction in 72 per cent of cases, superior to both abdominal thrusts (59 per cent) and chest thrusts (27 per cent). Survival to hospital discharge was also highest among those who initially received back blows (97.8 per cent) even after accounting for other important factors such as the patient’s age, sex and the type of obstruction.

Further, back blows caused no injuries, unlike abdominal thrusts and chest thrusts, which resulted in injury to the lungs, heart, liver, and ribs.

New American Heart Association guidelines

For the first time since 2010, the American Heart Association (AHA) updated its guidelines on how people should care for someone who is choking. Due to the AHA closely collaborating with the Heart and Stroke Foundation of Canada, these changes will impact first aid training across North America.

In the updated guidelines, our Canadian study was cited to inform this critical change, and was the only study directly comparing different choking techniques.

Previously, abdominal thrusts were recommended largely because they were reported more often in case descriptions, despite a known risk of serious injury. The updated guidelines now reflect the best available evidence.

So, how should you respond when you see a choking person?

If an adult or child can still cough, cry or speak clearly, then they are still able to clear the obstruction themselves. Get them to lean forward while encouraging them to cough forcefully.

If the person goes quiet, cannot speak or cry, or can only weakly cough, you want to start with five strong back blows first. With the person bent forward at their hips, deliver firm glancing blows between their shoulder blades using the heel of your hand up to five times.

If the obstruction does not clear, switch to abdominal thrusts. Continue alternating five back blows and five abdominal thrusts until the obstruction is cleared or the person becomes unconscious. Our study, along with others, showed that between 11 per cent and 49 per cent of choking persons will need more than one technique to successfully clear the obstruction.

Special circumstances to consider

Call 9-1-1 early. Get a bystander to call while you do back blows or place your phone on speaker if you are by yourself.

For children, kneel to their height to deliver back blows and abdominal thrusts effectively.

For infants who cannot stand, you can hold them in your arms. If the infant is still crying or coughing loudly, hold them with their head down supported by your arms. Then, if the obstruction doesn’t clear and they become quiet, you should begin with back blows followed by chest compressions, alternating until the obstruction clears.

If the person becomes unresponsive, assist them to the ground and start CPR with chest compressions. Each time you attempt to give rescue breaths, look for the object by opening the mouth and remove the object only if clearly visible.

Suction-based device

Recently, suction-based devices, such as LifeVac©, have been marketed as an alternative when other choking treatments fail, gaining attention on social media platforms like Facebook and TikTok. These devices create negative pressure in the upper airway to suction out an obstruction, in contrast to traditional techniques like back blows and abdominal thrusts that generate pressure from below.

Our research team has documented a considerable number of successful cases using these devices, with few injuries associated. Two trials in mannequins also found LifeVac© to be more effective at relieving simulation airway obstructions compared to abdominal thrusts.

While this early data is promising, major resuscitation organizations, like the AHA, have yet to make a conclusive recommendation on these devices yet – concerned that a bystander obtaining and using these devices may delay other lifesaving techniques. Still, this is an exciting field of research and larger, comparative studies will hopefully be conducted soon.

Time to get trained

People who know how to respond to choking emergencies can save a life in highly time-sensitive situations. Over the past two decades, simplified public CPR training has played a significant role in dramatically reducing deaths from cardiac arrest. Choking response has not benefited from similar public education campaigns.

Given immediate bystander response is the best chance the choking person has for survival, prioritization of mass public training in simple, evidence-based techniques such as back blows, may significantly improve choking survival.

The Conversation

Cody Dunne receives funding from the Canadian Institutes of Health Research (Grant # 202410MFE-531150-95777) and the Canadian Association of Emergency Physicians’ Junior Investigator Grant.

Andrew McRae receives funding from the Canadian Institutes of Health Research and Roche Diagnostics Canada.

Khara Sauro receives funding from the Canadian Cancer Society and CIHR.

ref. What to do if someone’s choking: Evidence says begin with back blows – https://theconversation.com/what-to-do-if-someones-choking-evidence-says-begin-with-back-blows-273903