Hip and knee replacement surgeries are among the most common operations performed around the world.
Although these procedures usually improve pain and mobility, they also temporarily increase the risk of dangerous blood clots forming in the legs or lungs. Preventing these clots is an important part of recovery because they can become life-threatening if left untreated.
Doctors often prescribe blood-thinning medicines after joint replacement surgery. In many hospitals, patients first receive the anticoagulant rivaroxaban before switching to aspirin.
While this approach works well, rivaroxaban is more expensive than aspirin and may not be easily available to every patient or health system.
A new study led by researchers at Dalhousie University suggests that a much simpler treatment may work just as well.
The research was published in the New England Journal of Medicine and is one of the largest and highest-quality studies to compare these two treatment strategies directly.
The clinical trial included more than 5,400 patients who had undergone hip or knee replacement surgery in Canada.
Participants were randomly assigned to receive either aspirin alone or rivaroxaban followed by aspirin, which is a common treatment approach in many hospitals. Neither the patients nor the researchers knew which treatment each participant received during the study.
The results were very similar in both groups. About 0.5% of patients experienced a serious blood clot during the 90-day follow-up period, regardless of which treatment they received. Bleeding complications were also almost identical, showing that aspirin alone did not increase the risk of major bleeding.
The researchers concluded that aspirin alone was ‘noninferior’ to the more complex treatment. This scientific term means that the simpler treatment performed just as well within accepted medical standards. In other words, patients did not lose protection by using aspirin alone.
These findings could have important practical benefits. Aspirin has been used safely for many years, costs very little, and is widely available around the world. A simpler treatment plan could also make recovery easier for patients and reduce healthcare costs without sacrificing safety.
Lead researcher Dr. Sudeep Shivakumar said the study provides strong evidence that aspirin alone is a safe and effective option for preventing blood clots after hip and knee replacement surgery. He hopes the findings will help doctors and patients make informed decisions about care after surgery.
This study has several strengths, including its large size, randomized design, and double-blind methods, which reduce the risk of bias.
However, treatment decisions should still be individualized because some patients have a much higher risk of blood clots and may need stronger anticoagulant medicines. Overall, the research suggests that many patients could safely recover with a simpler and less expensive treatment.
If you care about pain, please read studies about how to manage gout with a low-purine diet, and a guide to eating right for arthritis.
For more health information, please see recent studies about the link between processed foods and chronic diseases, and avoid these 8 foods to ease arthritis pain.
