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Tag: Medical

  • Astronauts Splash down on Earth after a Space Station Medical Evacuation

    Astronauts Splash down on Earth after a Space Station Medical Evacuation

    Image Credits:NASA

    Four astronauts evacuated from the International Space Station (ISS) safely returned to Earth after a “serious” medical issue cut their mission short by a month.

    The crew’s captain, NASA astronaut Mike Fincke, was the first to leave the spacecraft, smiling and wobbling slightly before lying on a gurney as part of standard procedures.

    NASA’s Zena Cardman, Japan’s Kimiya Yui, and cosmonaut Oleg Platonov followed him, waving and smiling at cameras. “It’s so good to be home!” Cardman said.

    This marks the first time astronauts have been evacuated for health reasons since the ISS began orbiting Earth in 1998.

    Crew-11 to Undergo Medical Checks After California Splashdown

    The Crew-11 team will complete medical evaluations before officials fly them back to land after their splashdown off the California coast.

    At a post-splashdown news conference, NASA administrator Jared Isaacman said the ill astronaut is “fine right now” and in “good spirits.”

    Based on NASA’s usual approach to crew health, officials are unlikely to disclose the astronaut’s identity or details of the illness.

    Russian cosmonaut Sergey Kud-Sverchkov and two other crew members have taken control of the ISS.

    Mission Cut Short After Astronaut Falls Ill, Spacewalk Canceled

    The astronauts had arrived at the ISS on 1 August, expecting a standard six-and-a-half-month mission, with a planned return in mid-February. However, NASA canceled a spacewalk for Fincke and Cardman last week and announced hours later that a crew member had fallen ill.

    “It’s bittersweet,” said Fincke as he handed over command of the ISS to Kud-Sverchkov on Monday. In a social media post, he added that all onboard were “stable, safe, and well cared for.”

    Orbiting Earth at 250 miles above the surface, the ISS completes 16 orbits per day at a speed of 17,500 mph. Managed by five space agencies, it conducts a wide range of scientific research on space and the effects of microgravity on humans, animals, and plants.

    ISS Lacks Onboard Doctor Despite Basic Medical Supplies

    Astronauts rely on training and supplies as ISS lacks doctor

    The evacuation served as a serious test of NASA’s procedures for managing medical emergencies. By most accounts, the mission went smoothly, though questions remain about how the agency might have responded if the astronaut’s condition had been more severe.

    The early return leaves the ISS with a reduced crew of just three: NASA’s Chris Williams and cosmonauts Sergey Kud-Sverchkov and Sergei Mikaev, until a new four-person team arrives in February.

    “Despite all the changes and challenges, we will continue our work on the ISS, carrying out all scientific and maintenance tasks, no matter what,” Kud-Sverchkov said on Monday, marking his first command with a group hug.

    Image Credits:Oleg Platonov, Mike Fincke, Zena Cardman and Kimiya Yui will end their ISS stay one month early

    The incident is unprecedented in the 26-year history of the permanently crewed ISS.

    Health issues have forced astronauts to cut short space missions only twice before. In 1985, Soviet cosmonaut Vladimir Vasyutin and his team returned from a Salyut 7 mission four months early due to a urological problem. In 1987, Soviet cosmonaut Aleksandr Laveykin left the Mir space station early because of a heart arrhythmia.

    With increasing human space travel—ranging from tourism to potential missions on the Moon or Mars—experts say future missions will likely need to include doctors on board.

    Read the original article on:bbc

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  • NASA Orders ISS Crew Evacuation After Unusual Medical Incident

    NASA Orders ISS Crew Evacuation After Unusual Medical Incident

    NEW YORK (AP) — In an unusual decision, NASA is ending an International Space Station mission ahead of schedule after an astronaut experienced a medical problem.
    Image Credits:(NASA)

    NEW YORK (AP) — In an unusual decision, NASA is ending an International Space Station mission ahead of schedule after an astronaut experienced a medical problem.

    NASA announced Thursday that the four-member U.S., Japanese, and Russian crew will return to Earth in the next few days, sooner than originally planned.

    Spacewalk Canceled as NASA Cites Astronaut Medical Privacy

    The agency also called off its first spacewalk of the year due to the health concern. NASA did not disclose the astronaut’s identity or details about the condition, citing medical privacy, and said the crew member is now in stable condition.

    NASA officials emphasized that the situation did not constitute an emergency aboard the station, but said the agency is “taking a cautious approach for the astronaut,” according to Dr. James Polk, NASA’s chief health and medical officer.

    Polk noted that this marks NASA’s first medical evacuation from the International Space Station, though astronauts have previously been treated in orbit for minor issues such as dental problems and earaches.

    The four astronauts now heading back to Earth arrived at the International Space Station aboard a SpaceX capsule in August for a mission planned to last at least six months. The crew consists of NASA astronauts Zena Cardman and Mike Fincke, Japan’s Kimiya Yui, and Russia’s Oleg Platonov.

    Fincke and Cardman had been scheduled to conduct a spacewalk to prepare for the future installation of new solar arrays aimed at boosting the station’s power capacity.

    According to NASA, this marked Fincke’s fourth mission to the space station and Yui’s second, while Cardman and Platonov were making their first trips to space.

    NASA Administrator Commends Swift Agency Response

    NASA Administrator Jared Isaacman praised the response, saying he was “proud of the rapid, agency-wide effort to safeguard the well-being of our astronauts.”

    Three additional astronauts remain aboard the International Space Station, including NASA’s Chris Williams and Russian cosmonauts Sergei Mikaev and Sergei Kud-Sverchkov. The trio launched aboard a Soyuz spacecraft in November for an eight-month mission and will return to Earth in the summer.

    NASA has selected SpaceX to handle the eventual deorbiting of the International Space Station, targeting late 2030 or early 2031, with plans for a controlled descent and splashdown in the ocean.

    Read the original article on: Sciencealert

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  • Can Digital Cadavers Replace Real Bodies in Medical Training

    Can Digital Cadavers Replace Real Bodies in Medical Training

    A human chest, initially the size of a room, fills your entire view. With a few commands, you shrink it to a tiny speck, then restore it to life-size and lay it flat. You peel away the skin and layers of muscle and organs, while informative text floats in the air, projected by your headset to guide what you see.
    Image Credits:Students learn anatomy from an Asclepius AI Table, which merges interactive elements and artificial intelligence.

    A human chest, initially the size of a room, fills your entire view. With a few commands, you shrink it to a tiny speck, then restore it to life-size and lay it flat. You peel away the skin and layers of muscle and organs, while informative text floats in the air, projected by your headset to guide what you see.

    Across the country, medical schools are increasingly using virtual reality and other digital tools to teach human anatomy. In some classrooms, screens now display detailed digital reconstructions of the human body in place of traditional cadavers, allowing students to explore bones, tendons, and muscles, watch movements in real time, and focus on specific anatomical features.

    Digital Cadavers Bring Anatomy to Life in the Classroom

    Sandra Brown, an occupational therapy professor at Jacksonville University in Florida, uses only digital cadavers in her introductory anatomy course. She says, “In a way, the dissection is brought to life. It’s a highly visual learning method, and students love it.”

    For centuries, dissecting real human cadavers has been central to medical education, providing insight into both organ structure and the body’s interconnected systems. Being physically close to a human body has long been considered the best way to understand anatomy. Yet cadaver dissection has also faced controversy, historically tied to grave robbing and unethical practices.

    Today, interactive diagrams, AI assistants, and VR experiences offer a potential alternative—no real bodies required. But as these technologies replace traditional dissection, questions remain about what might be lost and whether there are lessons from handling real human bodies that no digital tool can replicate.

    The Question of Learning Beyond the Physical Cadaver

    Ezra Feder, a second-year medical student at the Icahn School of Medicine at Mount Sinai in New York, reflects, “Does experiencing death provide value beyond the practical aspects of cadaver dissection? I’m not sure I have a clear answer.”

    One of the most popular innovations in anatomy education is the digital cadaver “table.” Resembling oversized iPads, these portable screens can be moved easily into classrooms or labs. Anatomage, a California company behind one such table, reports that over 4,000 healthcare and educational institutions have adopted its technology. The system digitizes real cadavers into thousands of images, letting students repeatedly explore the body’s layers and systems.

    Digital cadavers aren’t new, but they’ve become more realistic, interactive, and effective. Some schools have even replaced real human cadavers entirely. Brown, who teaches with the Anatomage table, notes that digital dissection aligns well with her students’ learning habits. “They’ve grown up with smartphones in their hands, so using this advanced virtual technology lets them apply the skills they already have—it was an obvious choice,” she says. “It’s really enjoyable.”

    Her students can manipulate digital cadavers in ways impossible with real bodies. “They can rotate the brain upside down and view it from underneath—something you just can’t do with a fragile cadaver,” she explains. “It’s a risk-free way to explore: if they make a mistake or can’t locate something, they can simply reset or undo it.”

    Other companies, such as Surglasses with its Asclepius AI Table, are advancing the digital cadaver concept even further. This table includes AI assistants with human avatars that can respond to voice commands from students and instructors, display relevant images, and quiz learners on their knowledge. Research indicates that AI assistants can enhance student learning, with avatar-based systems showing particular promise.

    “Students respond well to accessible technology,” says Saeed Juggan of Yale Medical School, which provides digital anatomy tools like a 3D body model. However, Juggan cautions that AI has limitations, especially if students ask questions not covered by its data. “What happens in that case? How do you guide the bot?” he asks.

    Immersive VR and AR Transform Anatomy Education

    Virtual and augmented reality (VR/AR) anatomy programs have made human dissection even more futuristic. Companies like Toltech create VR headsets that let students explore detailed digital cadavers, and during the Covid-19 pandemic, Case Western Reserve students interacted with holographic bodies from home.

    VR, however, has its challenges. Some students experience motion sickness with the headsets, says Kristen Ramirez of NYU’s Grossman School of Medicine. Her team’s approach is to adapt the technology to suit the specific type and content of instruction.

    Ramirez and a colleague developed an in-house VR program that lets students virtually stand inside a human heart. “They can see everything a red blood cell would experience if it had eyes and cognition,” she explains.

    Read the original article on: Smithsonianmag

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  • New Class of Medicinal Compounds that Target RNA

    New Class of Medicinal Compounds that Target RNA

    Graphical abstract. Credit: Biochemical and Biophysical Research Communications (2022). DOI: 10.1016/j.bbrc.2022.12.080
    Graphical abstract. Credit: Biochemical and Biophysical Research Communications (2022). DOI: 10.1016/j.bbrc.2022.12.080

    A team of undergraduate and also graduate chemistry students in Jennifer Hines’ laboratory at Ohio University recently uncovered a current class of compounds that can target RNA and disrupt its function. This discovery determined a chemical scaffold that might ultimately be utilized in the development of RNA-targeted medicines to treat bacterial and viral infections, along with cancer as well as metabolic illness.

    RNA vs DNA

    RNA is chemically like DNA; however, it likewise manages the extent to which the DNA’s instructions are executed within a living cell. This crucial regulatory role in the cell’s function turns RNA into an attractive target.

    “Trying to target RNA is at the forefront of medicinal chemistry study with huge potential for treating diseases,” stated Hines, professor of chemistry and biochemistry in the University of Arts and Sciences. “However, there are relatively few compounds understood to directly modulate RNA activity, that makes it challenging to design new RNA-targeted therapeutics.”

    The Hines team established that 4-aminoquinolines prevent the feature of the microbial T-box riboswitch RNA and also bind the stem-loop II theme RNA (an RNA structure located in the infection leading to the COVID-19 pandemic).

    “The compounds bind these RNA structures in extremely specific sites, making them great starting scaffolds for designing specific therapeutics. What was so surprising concern this discovery is that the probability for RNA binding was hiding in plain sight within the 4-aminoquinoline framework; however, no one had determined it before,” Hines said.

    “Our study determined that 4-aminoquinolines have different activities and chemical features extremely comparable to polyamines which are natural substances in the cell that modulate RNA function.”

    RNA Target Drug Discovery

    Hines stated that his team has been focused on examining ligand-RNA binding interactions, including larger and more dynamic RNA structural motifs, as part of a comprehensive RNA-targeted drug discovery project for over two decades. This extensive experience allowed his team to promptly respond to the pandemic by investigating the targeting of the viral stem-loop II motif RNA through computational research studies and laboratory experiments.

    The Hines team uses a mix of spectroscopic (fluorescence, UV-Vis, NMR); biochemical/biophysical (gel electrophoresis, isothermal titration calorimetry); also computational (docking, molecular dynamics simulations, quantitative structure-activity calculations, bioinformatics), methods in their RNA-targeted drug discovery studies.

    “It was in this earlier research where we initially noticed the 4-aminoquinolines, but not enough was understood about the function of the stem-loop II motif RNA to discern what the compounds could be doing,” Hines added.

    “As a result, we shifted to exploring the functional effect of these substances on the T-box riboswitch RNA, which manages gene expression in bacteria. In these riboswitch studies, we discovered that the compound’s inhibitory effect was dose-dependent in a way very comparable to the dose-dependency of polyamines, a class of compounds that typically bind RNA in the cell. It was in puzzling out why this may be the instance when I noticed the structural resemblance between the two classes of compounds.”

    Read the original article on PHYS.

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