Knee arthroplasty has a high potential for postoperative pain. This study compares analgesia and postoperative bleeding from intrathecal morphine with the continuous femoral and a single-shot sciatic nerve blockades.
This study aims to compare intrathecal morphine as a technique for analgesia with the femoral nerve blockade associated with a single-shot sciatic nerve blockade. Analgesic efficacy, the incidence of adverse effects, and postoperative bleeding were evaluated
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
40
femoral nerve blockade followed by a catheter placement for continuous infusion and a "single shot" block of the sciatic nerve at the end of the surgery
Intrathecal morphine injection
Analgesic Efficacy
Pain with verbal numeric rating scale (VNRS). VNRS has 11 points, from zero to 10 (zero= no pain, 1-3 = mild pain, 4-5 = moderate pain, 7-9 = severe pain, 10 = unbearable pain).
Time frame: baseline (zero hour: discharge of post-anesthesia care unit-PACU), 24hs, 48hs, 72 hours
Postoperative Bleeding
Postoperative bleeding volume (ml)
Time frame: baseline (discharge of post-anesthesia care unit-PACU), 24hs, 48hs, 72 hours
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