Quote: "Though the medical community has been using vertebroplasty for many years, there were no research results to prove whether the efficacy of the treatment relates to the cement injections, patient expectations, or other factors..."
Study Results Raise Questions About Vertebroplasty for Patients With Osteoporotic Spinal Compression Fractures
A new study led by Mayo Clinic researchers has found that relief of pain from vertebral compression fractures, as well as improvement in pain-related dysfunction, were similar in patients treated with vertebroplasty and those treated with simulated vertebroplasty without cement injections. The article, "A Randomized Controlled Trial of Vertebroplasty for Osteoporotic Spine Fractures," was released today in the New England Journal of Medicine.
Vertebroplasty is a widely applied procedure in which medical cement is injected into the spine to relieve pain and improve function in patients who have osteoporotic fractures. This study, funded by the National Institutes of Health, was the first of its kind, using a double-blinded research model to examine the impact of vertebroplasty.
"Though the medical community has been using vertebroplasty for many years, there were no research results to prove whether the efficacy of the treatment relates to the cement injections, patient expectations, or other factors," says the study's leader, David Kallmes, M.D., a Mayo Clinic physician who specializes in radiology and neurosurgery.
"The cement is a permanent medical implant, and there is some concern that it places patients at future risk for additional spinal fractures."
Researchers from eight medical centers in the United States, United Kingdom and Australia enrolled a total of 131 patients in the trial.
The baseline characteristics of pain and function were similar in the vertebroplasty group containing 68 patients and the control group containing 63 patients. Within days of treatment, both groups showed similar improvements in function and pain. Researchers continue to follow study participants, and one year results will be released at a later date.
"We aren't saying the vertebroplasty doesn't work, because it somehow does," says Dr. Kallmes. "But both sets of patients experienced significant improvements in pain and function a month following the procedure, whether they received cement injections or not. Improvements may be the result of local anesthesia, sedation, patient expectations, or other factors."
"Patients should seek medical advice from their care provider before making a decision about treatment options," Dr. Kallmes advises.
Other centers involved in the research included the University of Washington, Seattle; Nuffield Orthopaedic Center NHS Trust, Oxford, UK; St. George Hospital, University of New South Wales, Sydney, Australia; Gartnavel General Hospital, Glasgow, UK; Department of Social Medicine, Bristol, UK; Nottingham University Hospital NHS Trust, UK; and Western General Hospital, University of Edinburgh, UK. University of Washington researcher Jerry Jarvik, M.D., coordinated the data gathering and analysis for the project.
Dr. Kallmes says that several related research projects are in progress at Mayo Clinic, including a study of kyphoplasty, which uses a balloon to make space for cement injections, as well as an unblinded trial to measure the impact of local anesthesia on pain.
Mayo Clinic is the first and largest integrated, not-for-profit group practice in the world. Doctors from every medical specialty work together to care for patients, joined by common systems and a philosophy of "the needs of the patient come first." More than 3,300 physicians, scientists and researchers and 46,000 allied health staff work at Mayo Clinic, which has sites in Rochester, Minn., Jacksonville, Fla., and Scottsdale/Phoenix, Ariz. Collectively, the three locations treat more than half a million people each year.
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