Probability of dangerous blood clots in patients with coronavirus named

by time news

A new study found that patients with COVID-19 are twice as likely to develop dangerous blood clots after surgery. Patients with active COVID who develop the disease are also 450% more likely to die from the virus.

The study found that coronavirus patients and people who have had COVID-19 are at increased risk of developing dangerous blood clots after surgery. Researchers at the University of Birmingham in England have found a link between a past or active diagnosis of COVID and venous thromboembolism (VTE), a dangerous form of blood clots.

People who contracted COVID-19 in the previous six weeks before surgery were almost twice as likely to develop venous thromboembolism. The condition is a known complication of surgery, although researchers cannot determine why the coronavirus is causing it.

For the study, published in the journal Anesthesia, the team collected data on 128,013 patients who underwent various types of surgery in 1,630 hospitals in 115 countries. They divided patients into four categories: a control group that never had COVID-19, a group that had an active case of COVID, a group of “recent” cases of people who contracted the virus in the past six weeks, and a group of “previous” cases. patients who contracted the virus seven or more weeks ago.

The researchers aimed to find out how many patients developed venous thromboembolism within 30 days after surgery. In the control group, 666 out of 123 591 – 0.5 percent – developed VTE. Of those who underwent surgery with an active case of COVID-19, 50 out of 2317 had blood clots (i.e. 2.2%).

Among 953 patients with recent but recovered cases of COVID-19, 15 developed venous thromboembolism (1.6 percent). Finally, about one percent of patients with a previous case of COVID – or 11 out of 1,148 – developed venous thromboembolism.

The researchers adjusted this data for other factors that can lead to blood clots, such as age and previous blood clotting. After adjusting, they found that people with a recent case of COVID-19 were most at risk for venous thromboembolism, with a 90% increase in the likelihood of doing so.

People with active cases of COVID were 50 percent more likely to develop venous thromboembolism, while those with previous cases were 70 percent more likely to develop venous thromboembolism.

There is a direct link between infection with the virus at some point and the development of complications after surgery.

“People who undergo surgery are already at a higher risk of VTE than the general population, but we found that current or recent COVID-19 infection was associated with a higher risk of postoperative VTE,” said Dr. Elizabeth Lee, study co-author. “Surgical patients have risk factors for VTE, including immobility, surgical wounds and systemic inflammation, and the addition of COVID-19 infection may further increase this risk.”

Patients with COVID-19 also have a 450% increased risk of death if they develop venous thromboembolism.

Of the 76 patients who participated in the coronavirus and VTE study, 31 died (40.8 percent), compared with 319 of the 4,342 patients who did not develop VTE (7.4 percent).

Venous thromboembolism occurs when blood clots form deep in a person’s veins, often in the legs or thighs, called deep vein thrombosis.

There is another form of the disease called pulmonary embolism, in which one of the clots gets stuck in a person’s lungs. It usually forms after a person recovering from surgery has been lying motionless in bed for a long time. The lack of movement leads to the formation of clots, while the active person’s blood circulates at a faster rate.

Experts recommend that a person recovering from surgery take walks as often as possible to prevent clots from forming.

This disease affects 900,000 Americans every year, and people who have previously suffered from blood clotting are more likely to suffer from VTE. About 100,000 people in the United States die from all diseases associated with blood clots.

The Birmingham Research Group advises doctors to closely monitor their patients to determine when VTE is forming. “Raising awareness and observation should be considered,” they write. – At a minimum, we suggest strict adherence to standard VTE prophylaxis for surgical patients, including the use of anti-clotting drugs when the risk of bleeding is minimal, and increased vigilance and diagnostic testing in patients with signs of VTE such as leg edema, chest pain on the right side and shortness of breath. “

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