Astronauts can develop a condition called space anemia because their bodies destroy more red blood cells than normal when in space, a groundbreaking study shows.
Assessments of 14 astronauts over six months between space missions found that 54% more blood cells were destroyed while they were in space than when they were on Earth, according to findings published Jan. 14 in
A three-month sexual abstinence rule for blood donations from sexually active gay and bisexual men should be dropped by the U.S. Food and Drug Administration, critics urge as the country struggles with a blood shortage.
Right now, based on the slight chance of infection with HIV, men who have sex with men must abstain from sex with other men for 90 days before being eligible to donate blo...
There's an urgent need for blood donations as the United States' blood supply drops to one of its lowest levels in over a decade, the America Red Cross said Tuesday.
In the past few weeks, blood centers nationwide have reported "a dangerously low level" of less than a one-day supply of certain critical blood types, which means that lifesaving blood may not be available for some patients w...
Robert Preidt and Robin Foster HealthDay Reporters
Treating sickle cell anemia with the drug hydroxyurea may also reverse related heart abnormalities, a new study suggests.
Heart issues are common among people with sickle cell disease. Among them are enlargement of the heart and an impaired ability to relax heart muscles, a condition called diastolic dysfunction that can lead to heart disease and heart failure and death. Long-term treatme...
Barnacles may be the bane of ships, but they could point to new ways to quickly halt severe bleeding, researchers report.
Barnacles are small crustaceans that attach to rocks, ship hulls and even other animals, such as whales. Their ability to cling to surfaces that are often wet and dirty caught the attention of researchers trying to find new ways to seal wounds in emergency situations.<...
COVID-19 does not pose a threat to the safety of the United States' blood supply under existing donor screening guidelines, researchers report.
For the study, the investigators reviewed the results of tests for the presence of SARS-CoV-2 in nearly 18,000 pools of donated blood, representative of over 257,800 single blood donations that were collected between March and September 2020 from ...
Blood plasma from people recovering from COVID-19 could help prevent severe illness in older patients newly infected with the virus, a small new Argentinian study finds.
The findings give new hope to the notion that so-called "convalescent plasma" might have a role to play in treating COVID-19. Earlier studies had been disappointing, showing the treatment had little effect on people with...
The American Red Cross is urging COVID-19 survivors to donate blood plasma for hospital patients who need it to recover.
As an incentive to help boost the national convalescent plasma shortage, the Red Cross has teamed up with the National Football League and is offering donors a chance to win two tickets to next year's Super Bowl LVI in Los Angeles.
Sickle cell disease increases the risk of death or serious complications from COVID-19 infection, a pair of new studies suggests.
People with sickle cell disease -- a genetic blood disorder predominantly found in Black people -- are 6.2 times more likely to die from COVID-19 than the general Black population of the United States, one study found.
A pair of studies shed new light on why a relatively rare blood cancer -- acute myeloid leukemia (AML) -- is more deadly among Black patients.
The takeaways: Where patients live and their access to quality health care matter. And even when Black people with AML have the same access to treatment as white patients, their survival is shorter -- something genetic differences might explain.
If you use an oxygen concentrator and a pulse oximeter at home, proper use is crucial, the U.S. Food and Drug Administration says.
Conditions such as asthma, lung cancer, chronic obstructive pulmonary disease, the flu and COVID-19 can all cause oxygen levels in the body to drop. When levels are too low, oxygen therapy may be required to boost them.
Hospitalized COVID-19 patients face an increased risk of developing dangerous blood clots, a new review indicates.
The odds of a clot are highest for the most critically ill patients. Analysis of 66 studies found that 23% of COVID-19 patients in an intensive care unit (ICU) developed a blood clot in the leg, known as a deep vein thrombosis (DVT).
Antibodies against COVID-19 in people who've recovered from the disease begin to vanish about three months after they develop symptoms, researchers say.
This suggests that sooner is better for recovered COVID-19 patients to donate antibody-containing blood plasma for convalescent plasma treatment, according to the authors of a small study published Oct. 1 in the journal Blood.<...
Using the donated blood plasma of COVID-19 survivors to treat patients in the throes of severe coronavirus illness has met with some controversy. But a small new study suggests it could have real merit.
The study of 39 patients with severe COVID-19 who were treated at one New York City hospital found the treatment appeared to bump up survival, researchers said.
Researchers may have found a way for people with severe hemophilia to take their standard treatment less often, if the results of an early trial pan out.
In what experts called a feat of bioengineering, scientists were able to create a "fusion protein" that may extend the interval between treatments for hemophilia -- from about every couple of days to once a week.
Most strokes strike when an artery in the brain suddenly becomes blocked, but new research shows a rarer cause of strokes is becoming more common.
It's called cerebral venous thrombosis (CVT), and it happens when a vein in the brain is clogged. While CVT is estimated to cause less than 1% of all strokes, scientists discovered it is now more prevalent and affecting a different demo...
The American Red Cross will test all blood, platelet and plasma donations for COVID-19 antibodies so donors can learn whether they've been exposed to the new coronavirus.
"We recognize that individuals and public health organizations desire more information about COVID-19, and as an organization dedicated to helping others, the Red Cross is fortunate to be able to help during this pan...
Teens who donate blood are at significant risk for long-term iron deficiency, a new study warns.
The concern comes as 16- to 18-year-olds have emerged as one of the fastest-growing groups of blood donors nationwide. But this study of nearly 31,000 teens who gave blood more than once between 2016 and 2018 found that roughly one in 10 were already iron-deficient when they donated for t...
A new blood test might help doctors predict whether someone's multiple sclerosis may soon get worse.
The test looks for a substance called neurofilament light chain. It's a nerve protein that can be detected when nerve cells die. People with higher levels of it were more likely to have worsening MS effects within the next year.
The severity of COVID-19 illness may be influenced by what researchers call "cytokine storms."
In a new study, investigators assessed 522 COVID-19 patients, aged 5 days to 97 years, who were admitted to two hospitals in Wuhan, China, in December and January. The study also included a "control group" of 40 healthy people.
Compared to the control group, 76% of COVID-19 pat...
Pancreatic cancer is known as a "silent killer" because it's often detected far too late. But there's hope a new blood test may be able to spot the most common type of pancreatic tumor in its early stages.
In a small study, the test also appeared to be able to accurately identify the stage of pancreatic cancer in patients -- helping to determine the most appropriate treatment, researc...
America is in urgent need of blood donations during the coronavirus pandemic, so the U.S. Food and Drug Administration said Thursday it will relax donor restrictions placed on gay and bisexual men and others.
Specifically, the FDA has changed the abstinence period required for gay and bisexual blood donors from 12 months to 3 months.
As concerns about the new coronavirus escalate, the American Red Cross urges healthy, eligible people to give blood or platelets to help prevent blood shortages.
"We're asking the American people to help keep the blood supply stable during this challenging time. As communities across the country prepare for this public health emergency, it's critical that plans include a readily avail...
Gastrointestinal bleeding in patients taking blood thinners for an irregular heartbeat should prompt doctors to check for colon cancer, a new study advises.
Researchers looked at more than 125,000 patients in Denmark with the heart rhythm disorder atrial fibrillation (a-fib). They reported that those with gastrointestinal bleeding were 11 to 24 times more likely than others to be diag...
People with blood types A and B may have higher risks for developing dangerous blood clots compared to people who have type O blood. That's according to new research that also showed a slightly higher risk for certain types of heart disease among the A and B groups.
Past research has shown a likely link between heart disease and the ABO gene that exists in people with A, B or AB bloo...
Patients taking the blood thinner warfarin have been told that it should be taken at night, but a new study found the time of day doesn't matter.
"Whether warfarin is taken in the morning, or the evening, its therapeutic effect is the same," said lead researcher Dr. Scott Garrison, an associate professor of family medicine at the University of Alberta in Edmonton, Canada.