Τετάρτη 23 Μαΐου 2018

Ultrasound-guided single injection versus continuous sciatic nerve blockade on pain management and mobilisation after total knee arthroplasty (CoSinUS trial): A randomised, triple-blinded controlled trial

BACKGROUND Combining continuous femoral nerve blockade with single injection sciatic nerve blockade is standard peripheral nerve block practice for total knee arthroplasty (TKA) during the first 24 postoperative hours. OBJECTIVES To assess the analgesic benefits and mobilisation capability of continuous sciatic blockade in conjunction with continuous femoral nerve blockade for 72 h after arthroplasty. DESIGN Randomised, triple-blinded controlled trial. SETTING Single-Centre, German University Hospital. PATIENTS In total, 50 patients receiving continuous femoral nerve blockade (5 ml h−1 ropivacaine 0.2%) for TKA under general anaesthesia. INTERVENTIONS Patients were randomised to receive a sciatic nerve catheter with an initial dose of 10 ml ropivacaine 0.2% followed by either continuous double-blinded application of 5 ml h−1 ropivacaine 0.2% (CO) or 5 ml h−1 saline infusion (SIN). MAIN OUTCOME Measures primary endpoint: cumulative morphine consumption until 48 h postoperatively. Further endpoints included morphine consumption, pain scores, mobilisation, dynamometry until postoperative day 3. RESULTS Median [25th to 75th percentiles] cumulative morphine consumption at postoperative day 2 differed significantly between groups (CO 15 mg [11 to 25] versus SIN, 43 mg [27 to 67.5, P 

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