Total knee replacement is a frequent procedure in Québec's hospitals and the muscular strength of the quadriceps is the best indicator of the patient's functional recovery post surgery. Thus, the importance of the patient's recovery leads to the evaluation of the influence of the femoral nerve block on the muscle strength. The purpose of the study is to compare the short term and long term recuperation of the quadriceps' motor strength of after a total knee arthroplasty using different types of analgesics such as the continuous femoral nerve block, the single dose femoral nerve block and the systemic analgesic, a patient controlled analgesic pump.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
135
Patients receive 20 ml of ropivacaine 0.5 % pre-operation through femoral block catheter, followed by ropivacaine infusions from 0.1 % to 0.1 ml/kg/hour for 48 hours.
Patients receive 20 ml of ropivacaine 0.5% pre-operation
Patient controlled analgesics alone, no femoral block
CHA-Pavillon Enfant-Jésus
Québec, Quebec, Canada
Quadriceps strength measurement with Cybex machine
Evidence of the influence of the different types of analgesics on the strength of the quadriceps post surgery. Quadriceps strength will be evaluated in open chain and closed chain with the help of the Cybex machine.
Time frame: 6 weeks after surgery
Quadriceps strength measurement with Cybex machine
Evidence of the influence of the different types of analgesics on the strength of the quadriceps post surgery. Quadriceps strength will be evaluated in open chain and closed chain with the help of the Cybex machine.
Time frame: 6 months after surgery
Quadriceps strength measurements with Cybex machine
Evidence of the influence of the different types of analgesics on the strength of the quadriceps post surgery. Quadriceps strength will be evaluated in open chain and closed chain with the help of the Cybex machine.
Time frame: 12 months after surgery
Overall functional recovery
The overall functional recovery of the patient will be evaluated considering the analgesic type using SF-36 and WOMAC questionnaires.
Time frame: 6 weeks after surgery
Pain score on Visual Analog Scale (VAS)
Evaluation of the effectiveness of the analgesics on pain with VAS .
Time frame: every 6 hour for the 48 hours following surgery
Hospital stay length
Evaluation of the hospital stay length after total knee replacement taking into account the different types of analgesics.
Time frame: 4 to 7 days after surgery
Overall functional recovery
The overall functional recovery of the patient will be evaluated considering the analgesic type using SF-36 and WOMAC questionnaires.
Time frame: 6 months after surgery
Overall functional recovery
The overall functional recovery of the patient will be evaluated considering the analgesic type using SF-36 and WOMAC questionnaires.
Time frame: 12 months after surgery
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