Every year, millions of people undergo hip or knee replacement surgery to relieve pain caused by arthritis and other joint diseases.
One of the biggest concerns after these operations is the formation of blood clots, which can travel to the lungs and become a medical emergency.
Because of this risk, blood-thinning treatment is routinely recommended during recovery.
For years, many hospitals have used newer anticoagulant medicines such as rivaroxaban before switching patients to aspirin.
These medicines are effective but can be expensive, creating challenges for some patients and healthcare systems. Researchers wanted to know whether aspirin by itself could provide the same level of protection.
Scientists led by Dalhousie University carried out a large clinical trial involving more than 5,400 patients across Canada. Their findings were published in the New England Journal of Medicine. The study directly compared aspirin alone with the more complicated treatment of rivaroxaban followed by aspirin.
Patients were randomly assigned to one of the two treatment plans, and the study was double-blinded so neither patients nor doctors knew which medicine was being given. This type of study provides some of the strongest scientific evidence because it minimizes bias and allows fair comparisons.
During the 90 days after surgery, the results were almost identical. Serious blood clots developed in only about one-half of one percent of patients in both groups. Rates of bleeding, another important safety concern with blood thinners, were also very similar.
These findings showed that aspirin alone was just as effective as the more complicated treatment strategy. For many patients, this could mean fewer medicines, lower costs, and a simpler recovery without increasing the risk of dangerous complications.
The researchers believe the findings could influence future medical guidelines as the number of joint replacement surgeries continues to rise worldwide. Using aspirin alone could make treatment more accessible, particularly in healthcare systems with limited resources.
Lead investigator Dr. Sudeep Shivakumar said the study provides reassuring evidence that aspirin alone is both safe and effective for preventing blood clots after hip and knee replacement surgery. He hopes the results will help doctors choose the most appropriate treatment together with their patients.
This research is especially important because it was a large randomized double-blind clinical trial, making its conclusions highly reliable. However, the results may not apply to every patient, especially those with unusual clotting risks or other serious medical conditions.
Even so, the study offers strong evidence that a simple, inexpensive medicine may be all many patients need after joint replacement surgery.
If you care about pain, please read studies about vitamin K deficiency linked to hip fractures in old people, and these vitamins could help reduce bone fracture risk.
For more health information, please see recent studies that Krill oil could improve muscle health in older people, and eating yogurt linked to lower frailty in older people.
