Why quit smoking is so hard.

@Health

Scientists have learned how to "turn on" any smell by stimulating neurons with ultrasound—without the actual source. To do this, they developed a headset that stimulates different areas of the brain. With it, people could smell fresh air, a campfire, and even garbage.

@Health

​​What is “Heart-in-a-Box” technology, and how does it work?

Heart-in-a-Box technology is an advanced organ-preservation and transport system used in heart transplantation. Traditionally, a donor heart is preserved by packing it in ice, which keeps it viable for only 4–6 hours and does not allow doctors to assess its function during transport. In contrast, Heart-in-a-Box uses ex-vivo heart perfusion, meaning the heart is kept outside the body but alive and beating inside a sterile, portable machine. The system continuously supplies the heart with warm, oxygenated blood mixed with nutrients and medicines, closely mimicking natural human circulation.

This technology allows surgeons to monitor the heart in real time while it is being transported. Parameters such as heart rate, blood flow, pressure, lactate levels, and electrical activity are continuously measured, helping doctors judge whether the donor heart is healthy enough for transplantation. Because the heart remains metabolically active rather than being put into cold storage, the risk of tissue damage due to oxygen deprivation is significantly reduced. As a result, the safe preservation time is extended, enabling long-distance transport and better coordination between donor and recipient hospitals.

Heart-in-a-Box technology has revolutionized heart transplantation by increasing the number of usable donor hearts, including those that might have been rejected under traditional ice storage. It improves transplant success rates, reduces complications after surgery, and offers new hope to patients with end-stage heart failure. Similar perfusion systems are now also being developed for lungs, liver, and kidneys, marking a major advancement in modern transplant medicine.

​​What is the purpose of keeping water in the oxygen cylinder setup in hospitals?

In hospitals, water is kept in a bottle attached to the oxygen cylinder to humidify the oxygen before it is delivered to the patient. Medical oxygen supplied from cylinders or central pipelines is dry and moisture-free. If this dry oxygen is given directly for long periods, it can dry out the nasal passages, throat, and airways, leading to irritation, burning sensation, nosebleeds, sore throat, and thickened mucus. The humidifier bottle partially fills with sterile or distilled water, and as oxygen bubbles through this water, it picks up moisture, making the inhaled oxygen comfortable and safe for the patient.

Humidified oxygen is especially important for patients receiving continuous oxygen therapy, high flow oxygen, or those who are elderly, unconscious, or on ventilatory support. Moist oxygen helps maintain normal moisture levels in the respiratory tract, prevents damage to delicate airway linings, and keeps mucus thin, which improves breathing efficiency and secretion clearance. Without humidification, prolonged oxygen therapy may worsen breathing discomfort rather than improve it.

It is important to note that water is not stored inside the oxygen cylinder itself. The cylinder contains only high-pressure pure oxygen. The water is present only in the external humidifier bottle, which is cleaned regularly and filled with sterile water to prevent infection. Thus, the purpose of water in hospital oxygen setups is not storage, but humidification, ensuring effective, safe, and patient-friendly oxygen delivery. @Health

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The Most Dangerous Animals in the World.

@Health

Scientists have created an early prototype called Pulse-Fi that can estimate a person’s heart rate using Wi-Fi signals, without wearables or physical contact. The system uses AI and low-cost, off-the-shelf hardware to analyze tiny changes in Wi-Fi signals caused by chest movement during breathing and heartbeats.

In tests, Pulse-Fi remained accurate across different distances (up to 3 meters), body positions, and light activities. Average error stayed below half a beat per minute, and in some cases was as low as 0.2 BPM. The setup relies on two simple Wi-Fi devices acting as a sender and receiver, extracting heart rate data from channel state information.

Researchers say this contact-free approach could one day be a cheaper alternative to smartwatches, though experts note the technology is still experimental and likely 5–10 years away from real-world use.

@Health

🐟 Fish skin for burns:- Sterilized Nile tilapia skin, is used as an innovative, effective, and low-cost biological dressing for burn victims, offering faster healing, pain reduction, fewer painful dressing changes.

@Health

Every year, electric kettles kill 500 people.

This happens due to improper use and violation of safety rules when working with electricity.

Therefore, it is very important to monitor the condition of your household appliances and not violate the rules of their operation.

@Health

How sleep length affects your health risks

@Health