Local Anesthetic Automated Intermittent Administration vs. Continuous Infusion Via Femoral Nerve Block.

Continuous Infusion vs. Programmed Intermittent Bolus of Ropivacaine Through Peri-neural Femoral Nerve Catheter After Total Knee Arthroplasty: Impact on Analgesia Quality and Motor Block Frequency.

This study evaluates the impact of local anesthetic administration regiment through peri-neural femoral nerve catheter on pain and motor block frequency, after total knee arthroplasty.

This study evaluates the impact of local anesthetic administration regiment through peri-neural femoral nerve catheter on pain and motor block frequency, after total knee arthroplasty. One group of patients will receive automated intermittent bolus, while the others will get a continuous infusion. In both cases, patients will be able to administer supplementary auto-bolus if required.

Inclusion Criteria:

• admitted for unilateral primary total knee arthroplasty.

Exclusion Criteria:

• ASA score > 3
• BMI > 40
• refusal of loco-regional technique.
• psychiatric disease.
• inability to understand/ use the Local anesthetic delivery pump.
• local anesthetic allergy,
• porphyry,
• uncontrolled epilepsy,
• severe cardiac arrhythmia.