Hip Arthroplasty Clinical Trial
Official title:
Effect of Intrathecal Ketorolac on Mechanical Hypersensitivity After Total Hip Arthroplasty
Chronic pain in patients following total hip replacement seems to be a significant problem.
Previous research has shown that more effective pain management in the early postoperative
period may decrease the incidence of the development of chronic pain states.
This study will evaluate whether ketorolac (a non steroidal anti-inflammatory drug) given
into the spinal fluid before surgery will reduce the area of sensitivity (or pain to light
touch) following surgery. Patients will be monitored during their postoperative hospital stay
and then contacted by telephone at 8 weeks and 6 months after surgery and questioned about
any pain they are having at their surgical site. Patients that are still experiencing pain at
6 months will be asked to return to the medical center for the study staff to assess their
pain or sensitivity at the surgical site.
Surgery results in hypersensitivity to mechanical stimuli surrounding the wound and in a subset of patients, also results in chronic pain. The purpose of the study is to test whether intrathecal ketorolac, by selectively and effectively blocking cyclooxygenase in the spinal cord, will reduce hypersensitivity surrounding the surgical wound in patients with high risk for developing chronic pain after surgery. We have chosen to study patients having total hip arthroplasty (THA) because chronic pain seems to be a significant problem after surgery. We will sample cerebrospinal fluid (CSF) prior to injection of the study medication for subsequent prostaglandin E2 (PGE2) analysis in each patient. We will also assess each patient at 48 hours after their surgery for hypersensitivity at their surgical site. ;
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