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What Is Heat Stress that Scientists Call to Include in Heat Alerts?

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Heat waves and extreme temperature alerts have become commonplace in many countries. However, these alerts rarely include other factors that dangerously affect human beings and that also hinder their ability to adapt.

Advisories from weather services about heat waves should be based not only on temperatures but also include heat stress indices that take into account factors such as humidity, wind and sun exposure, according to a recently published scientific study. A high level of humidity in the environment and the absence of wind can make, for example, an extreme temperature of 37ºC more harmful to health than the same temperature in a dry environment, making it difficult for the human body to cool down.

This is one of the main points of the study prepared by an international scientific team from the Barcelona Institute for Global Health (ISGlobal) and the London School of Hygiene and Tropical Medicine (Lshtm) published in the journal Npj | Climate and Atmospheric Science de Nature. In the study, they warn that relying solely on temperatures may be insufficient to inform the population about the true health risks of a heat wave, and they request that this data be included in the alerts.

What is heat stress?

“In a simple way, it is about taking into account that temperature is not the same as heat”, explains Xavier Rodó, one of the authors of the study. “The difference is in how the body physiologically perceives the combination of high temperature and high humidity”, he says. “This is what the different heat stress indices take into account in a way, along with other parameters like wind and radiation, but basically the central aspect is humidity”.

The Spanish scientist and head of ISGlobal’s “Climate and Health” program highlights that “more than anything else, what the study does is emphasize that communication by meteorology services and how extremes, waves of heat, is based solely, at least here in our country and in other countries, on maximum temperatures. However, he believes that the footsteps of other countries such as the US, Canada and Germany, which have already included heat stress indices when reporting heat waves, should be followed “as a more adequate measure of hazard, from an alert situation, basically because at the same temperature, at different humidity, the risk is different”.

With humidity above 50% and high temperatures, the body loses the ability to dissipate excess heat by not being able to sweat the same, so it cannot cool down, which can pose harmful health risks. “This is the difference introduced by heat stress indices and this is quite simple, on a scientific level it is not an advance. Yes, it is from the point of view of communication: how does this reach the general population and more so at a time when this type of situation occurs more frequently”, adds Rodó.

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There are different indexes used worldwide

Although each person’s threshold for heat resistance varies depending on a number of individual factors, different indices of heat stress have been designed to describe the impact of weather conditions on the body, including the point at which the conditions experienced can become a threat to human health. Just as there is no single heat alert level for everyone, there is also no single heat stress index.

Some of the best known examples are humidex (Hu) -used in Canada-, the heat index (HI) -used in the US- and the universal thermal climate index (UTCI), used in Germany. However, the actual message of heat wave danger through the news and media continues to be linked for the most part to maximum temperatures. Very rarely does it include information on the expected values of these indexes due in part to public ignorance.

At this point, the experts insist that depending on the humidity, 36ºC in a certain place can be, in one case, very uncomfortable and, in another, dangerous. “In these 2 cases, if 2 different alert levels are not established and the substantially different expected health impacts are not clearly communicated, it is easy for the local population to lose perception of the different levels of danger associated with both 36ºC events”, they wrote in the study. This is especially important when considering so-called ‘humid heat waves’, the frequency of which is feared to increase with climate change.

Humid heat waves can make conditions around temperatures previously considered safe in a given location (during dry heat waves) dangerous, they add. Despite this, the researchers behind the study are encouraged that some countries already use these indexes. “What is still missing is that the heat indices are communicated to the population on a regular basis, as is traditionally done with temperatures”, says the study’s lead author, Ivana Cvijanovic. “It could contribute to this if the scientific community reached a consensus on which heat index is better to communicate and which levels of danger to use”.

Beware of the “Danger Zones”

To prepare the study, the scientific team studied recent record-breaking heat waves in Europe, North America and Asia and compared the maps of daily maximum temperatures with those of the maximum heat stress indexes for each day. The geographic areas where the heat stress indices revealed the highest risk did not necessarily coincide with the regions where the highest temperatures were recorded.

For example, during the heat waves in Europe in June and July 2019, records show that central and northeastern Spain experienced the highest temperatures. However, when calculating the heat stress indexes, the research team found that the areas with the most critical conditions were in France, Belgium and the Netherlands, countries that registered an excess mortality of 2,500 deaths.

Another of the cases mentioned was the episode of extreme heat that occurred in parts of western Canada and the northwestern United States in June 2021. Although the maximum temperatures were registered in the states of Washington and Oregon, the stress indexes revealed that Canadian provinces such as Alberta, the Northwest Territories and British Columbia also experienced dangerous conditions, the latter recording 600 heat-related deaths.

“Lessons learned from recent major heat waves suggest that action protocols need to be improved. Once the weather alert has been issued, a clear chain of responsibilities is necessary”, says Ivana Cvijanovic. “Authorities must act promptly and know when to close schools or halt outdoor sports activities, open cooling centers for socially vulnerable populations, and ensure a sufficient emergency response. Educating the general population on how to behave during heat waves is also very important”, she adds.

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Learn About the Latin American Experimental Surgery that Relocates the Uterus to Maintain Fertility in cancer Patient ⋆ The Costa Rica News

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Cancer is not a disease that causes infertility, unless it has specifically affected the reproductive organs. However, radiation therapy treatment can cause eggs to die or damage other parts of the region, which can lead to infertility.

With this in mind, ReitanRibeiro, a researcher and oncology surgeon at the Institute of Robotic Surgery in Paraná (Brazil), has developed the technique, in the experimental phase, which has become known worldwide as uterine transposition. The objective is to preserve fertility in women who undergo radiotherapy sessions in cancer treatment.

The method, carried out within a research protocol, consists of transferring the reproductive organs to the upper part of the abdomen, to keep them intact during the therapies. At the end of the treatment, the uterus, fallopian tubes, and ovaries return to their original location.

One of the beneficiaries of the transposition was the make-up artist Carem dos Santos (33 years old). In June 2018, she was discovered to have a liposarcoma (a rare tumor that originates in fatty tissue in the body) in her pelvis and, as part of her treatment, would require radiation therapy to treat the cancer cells.

However, the radiation would affect her uterus, preventing a future pregnancy. “I did not have a boyfriend or children, but I was planning to start a family after I was 30. So this news was very sad and the radiation therapy doctor gave me some time to see what I could do”, she recalls.

During this period, she learned about the uterine transposition technique, a study being carried out in Curitiba that aimed to preserve the organ for a subsequent pregnancy. “The doctor was very honest in saying that it was still a study and that no women had gotten pregnant, so he could not guarantee that I would get pregnant later, but I listened to myself and had surgery”, says the makeup artist.

Carem remembers that the postoperative period was quite painful during the first 15 days. Otherwise, there were no complications. Within 3 months after the radiotherapy sessions, the organs were replaced in their proper place.

Over time, she was discovered 2 more cancers, one in the pleura and the other in the lung, and she underwent the respective treatments. “I met my husband in 2021 and, when he was finishing these processes, I found out that she was pregnant”, she says. “Today I look at it and think: my God, it was the best decision I made in my life, because I fell in love with motherhood. Courage and faith were very important to me and we have to talk about it, because it is the dream of many women”, she concludes.

Cervical cancer

In 2020, AngélicaHodeckerAzambuja, a 33-year-old newlywed hairdresser, was diagnosed with cervical cancer through routine examinations. “The doctor’s first option was to remove the uterus, ovaries and fallopian tubes, but since my cancer was only in the cervix, it had not affected these organs. Still, I hypothesized”, she recalls.

At first, says Angélica, it was very difficult to assimilate the news that, in addition to being sick, she would not fulfill her dream of being a mother in the future. “I was devastated, because a woman may not even want to be a mother, and that’s fine, but when someone tells you that you are not going to be able to have children, that you have no choice, it really affects you”, she says.

They operated on her to remove part of her cervix and then came her difficult decision. “Either I interrupted the treatment to get pregnant, or I lost the opportunity to have children, because I had to undergo radiation therapy”, she says. However, she was not satisfied with the options presented to her and she went in search of an alternative. It was then that she was introduced to uterine transposition. “At first I was unsure because it was a very new study and I didn’t know if it would work”, she says.

Even so, Angélica underwent the transposition, and 15 days later she underwent chemotherapy and radiotherapy treatment. “A week after finishing the chemo and the radio, in March, I had the transposition operation again and it was super good, I had a quiet recovery”, says the hairdresser.

In October 2021, she received the diagnosis of remission of the disease and then decided that it was time to try to have a child. To her surprise, she became pregnant naturally the following year. “Uterine transposition was the best option I had and the best decision we (her and her husband) made”, says Angélica, mother of Isabel, who is only 5 months old.

How does uterine transposition work?

It is a minimally invasive surgery performed with robotic technology that removes the uterus, fallopian tubes, and ovaries from their original location and repositions them in the upper abdomen, temporarily, to preserve them during the radiotherapy treatment that is performed in the pelvic region. This is because, even if it is not directed at the uterus, the side effect of radiation therapy is harmful to the eggs, causing infertility or early menopause.

According to Ribeiro, the Brazilian surgeon responsible for the development of the technique, the surgery is low risk and patients are usually discharged one or two days after the procedure. They may feel pain or discomfort postoperatively, “but, in general, they have a normal life, even with the uterus temporarily in an abnormal position”, he says. The uterus continues to function normally, even when it is repositioned, as well as ovarian function. And, at the end of the sessions, the reproductive organs are put back in their place.

Transposition may be indicated for patients who need radiation therapy to treat tumors in the rectum, intestine, bladder, vagina, vulva (among others) and cases of sarcomas, which are malignant tumors in soft tissues, such as muscle, fat, and tendons, in which that a few radiation sessions would be enough to cause infertility.

According to Renato Moretti Marques, coordinator of the Robotic Surgery Program in Gynecology at the Albert Einstein Israelite Hospital, there are contraindications for transposition. “It is essential that the disease has not compromised the uterus, fallopian tubes and ovaries. And if this patient does not have functional ovaries, it is not possible to move the uterus, because there would be no way to nourish it, and if she has already received pelvic radiotherapy, it is not possible to perform this surgery either”, explains Marques, who is also coordinator of the Department of Gynecological Oncology of the Vila Santa Catarina Municipal Hospital.

Uterine transposition is already in the experimental phase

Although several surgeries have already been performed, uterine transposition remains an experimental study. The technique was already presented at an international gynecologic oncology congress in 2016 and the study is in the publication phase.

The first surgery was performed in October 2015 in Brazil by the doctor and researcher ReitanRibeiro and, since then, it has been adopted in several countries, such as Germany, Russia, Argentina, Colombia, the United States, Israel, among others. Dozens of patients have already undergone uterine transposition, 20 out of them in Brazil alone. However, there is a history of failed cases in which the uterus became necrotic after a clot obstructed the artery, preventing the nutrition of the patient’s organ.

Marques states that “she would lose it anyway due to the radiotherapy treatment, so this is an opportunity for the patient to preserve the reproductive organ”. This is still a long-term phase 3 experimental study, conducted with the patients themselves. “We are now in phase 3 of the studies, with a large number of patients to evaluate in the long term, because there are patients who have not even tried to get pregnant yet, because they are very young”, explains Ribeiro.

The Brazilian surgeon stresses that today the objective of oncology is not only to cure the patient, but to ensure that she has the same quality of life as before undergoing treatment. This was his main motivation for studying transposition surgery. “About 10 years ago, we tried to cure cancer at all costs and even sinned excessively. Today, we not only want to cure a cancer patient, we want to cure him and have a normal life”.



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Apple Launches Into the World of Virtual Reality and Announces Its Mixed Reality Glasses

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Apple announced on Monday the launch of Apple Vision Pro, a set of mixed reality glasses and headsets with which users can experience virtual reality (VR) and augmented reality (AR) experiences.

This is the first introduction of new products since the launch of its Apple Watch in 2015 and the company has described it as a new era at its Worldwide Developers Conference (WWDC, in English) held at its headquarters in Cupertino (USA). .USA).

The starting price will be $3,499 and will be available “early next year in the United States,” a much higher price than its competitors. The company has not yet given details of the release and prices in other countries.Tim Cook, the company’s chief executive officer, described the technology as something that “seems like magic” and “a revolutionary product.”

A new type of computer

“Vision Pro is a new type of computer that augments reality by seamlessly blending the real world with the digital world,” Cook explained, saying that with this technology – which users can control with their own eyes and hands without the need to command- “the screen no longer limits the world around (the user).”

Glasses That Allow Other People to See

Apple Vision Pro technology allows that when another person approaches the user who wears the glasses, the user can see that person on his screen.In addition, the other person will be able to see the user’s eyes, since the black screen that covers them fades when someone is nearby.

Cook highlighted that some of the activities that users can do with these glasses are “watching your movies, shows and sports and immersing yourself in games on a giant screen surrounded by special audio and connecting with people as if they were sharing the same space” .In addition, the set -which is similar to a ski goggles- can be used as an external display for a Mac.

Apple, which has been working on this project for seven years, has created virtual reality versions of some of its applications such as Safari, FaceTime, Apple TV and Apple Books, among others.

Also taking the WWDC stage was Disney CEO Bob Iger, who announced that the two companies will be partnering and that Disney+ will be available on Vision Pro from “day one.”

Last week, Meta announced its Meta Quest 3 set, a new mixed reality headset similar to Apple’s, will be available this fall for $499.99.Today’s announcement of the Vision Pro eclipsed other launches the Apple company made today, such as the new 15-inch MacBook Air which is 11.5mm thick, which Apple says makes it the ultimate 15-inch laptop. “thinnest in the world” The starting price of this laptop is $1,299 and it will be available next week.Apple’s iOS 17 was also launched at WWDC, which allows, among other things, the immediate transcription of voice messages.

Among the new apps announced Monday is Journal, a new custom journaling app that lets users create memories using “intelligently curated” suggestions based on iPhone information such as photos, locations and music.Japanese game designer Hideo Kojima also made a brief appearance to highlight the power of the latest M2 chips and a new game mode in macOS Sonoma.

After the first day of presentations of this event that will last all week, Apple shares fell more than 1%, after they rose 1.5% today in the hours before it unveiled its new products.

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US Ambassador for Technological Issues Will Visit Costa Rica

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The United States’ Roving Ambassador for Cyberspace and Digital Policy, Nathaniel C. Fick, will tour Latin America, including Costa Rica.The regional trip will be from June 5 to 9 and will also pass through Panama and Colombia. In our country he will be between Monday 5 and Wednesday 7.In each nation, Fick will meet with the government and the technology sector, as well as with representatives of civil society.

“Ambassador Fick will meet with his counterparts to discuss cooperation on connectivity.(Also) secure infrastructure for information and communication technologies, cybersecurity assistance, cyber resilience and governance, and promotion of digital freedom,” the State Department said.

RightsCon Human Rights Summit

In addition, during his stay in Costa Rica, the representative will be at the RightsCon Human Rights Summit.During his trip, the ambassador will be accompanied by a Delegation of Association Opportunities. Dorothy McAuliffe, Special Representative for Global Partnerships, also participates in it.This delegation will include representatives from the US Export-Import Bank and private sector leaders from more than a dozen US technology companies.

Who is the ambassador?

Ambassador Fick studied Philosophy at Dartmouth College; He then earned Master’s degrees in Public Administration and Business at Harvard University.

In addition to this, he passed through the United States Armed Forces, specifically in the Navy.His career has always focused on the area of ​​technology. He led cybersecurity and information security software companies.

In 2018, Fast Company magazine named him one of the “100 Most Creative People in Business” and Endgame was selected by Forbes as one of the “World’s 100 Best Cloud Companies.”

From 2009 to 2012, Fick was Executive Director of the Center for a New American Security, a national security research organization in Washington.He has also ventured into literature with a book called “One Bullet Away”, where he narrated his military activities in Iraq and Afghanistan.

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At Resonance, we aspire to live in harmony with the natural world as a reflection of our gratitude for life. Visit and subscribe at Resonance Costa Rica Youtube Channel https://youtube.com/@resonanceCR



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