Phantom Limb Pain Clinical Trial
Official title:
Double Blind, Placebo Controlled Study for the Study of the Effectiveness of Perioperative Analgesia in Phantom and Stump Pain
Severe pre-amputation pain is associated with phantom pain development, and phantom pain models assign major importance to central and peripheral nervous system changes related to pre-amputation pain. Several interventions have been evaluated for phantom pain prevention, including continuous brachial plexus blockade5, intravenous6 or epidural ketamine administration, postoperative perineural ketamine/clonidine infusion8 and oral gabapentin9, but their true effect remains unclear.
In a prospective, randomized, double-blind trial, 65 patients undergoing elective lower limb amputation were assigned to one of five analgesic regimens. Patients in groups 1-4 had lumbar epidural catheter placed 48 hours before amputation, and received epidural bupivacaine/fentanyl or saline infusion before and/or after amputation. Patients receiving epidural saline also had IV Fentanyl Patient-Control Analgesia, whereas patients receiving epidural analgesia also had IV saline. Group 5 (control) received IM meperidine and oral codeine/acetaminophen. VAS and McGill Pain Questionnaire (MPQ) scores (for ischemic, phantom and stump pain) were recorded starting 48 hours before, continuing until 48 hours after amputation, and at 4 days, 10 days, 1 and 6 months after amputation. Phantom and stump pain intensity and frequency were the main study endpoints. ;
Allocation: Randomized, Endpoint Classification: Efficacy Study, Intervention Model: Factorial Assignment, Masking: Double Blind (Subject, Investigator, Outcomes Assessor), Primary Purpose: Prevention
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