Perioperative Analgesia After Knee Arthroplasty

Perioperative Analgetic Therapy After Knee Arthroplasty

The purpose of this study is to compare two accepted methods of pain control in knee arthroplasty surgery.The first method combines the periarticular injection of ropivacaine with continuous blockade of the femoral nerve.The second method uses periarticular infiltration of ropivacaine in combination with an bolus of ropivacaine into an intraarticular catheter placed intraoperatively followed by a continuous intraarticular infusion of ropivacaine. All patient will also receive a sustained-release oral opioid and oral rescue opioids determined by pain severity using the Visual Analog Scale (VAS)

Inclusion Criteria:

• Elective primary knee arthroplasty
• ASA I,II,&III patients
• Spinal Anaesthesia

Exclusion Criteria:

• Patients refusing consent
• Contraindications to regional anaesthesia
• Preexisting neurological disease
• Alcohol or drug abuse
• Inability to use the outcome assessment tools
• Wheel chair or walker dependent
• Pregnancy