Femoral Versus Psoas Continuous Peripheral Nerve Blocks Following Hip Arthroplasty

활성 비교기: 1. Femoral Nerve Block

Patients will be randomized with a computer program to receive a femoral catheter. The catheter will be placed using standard technique. The time of catheter placement will be recorded as well as the pain/discomfort of catheter placement as reported by the patient on a 0-10 scale where 0=no pain/discomfort and 10=worst imaginable pain/discomfort.

절차: Femoral Nerve Block vs. Psoas Compartment Nerve Block

Patients, undergoing hip arthroplasty or hip resurfacing will be randomized to one of two groups: femoral nerve block or psoas compartment nerve block. Patients randomized to femoral nerve block will receive this block prior to surgery. Patients randomized to psoas compartment nerve block will receive this block prior to surgery. Both patients will receive Mepivicaine via catheter prior to surgery and following surgery, Ropivicaine via pain pump.

활성 비교기: 2. Psoas Compartment Catheter

Patients will be randomized with a computer program to receive a psoas compartment catheter. The catheter will be placed using standard technique. The time of catheter placement will be recorded as well as the pain/discomfort of catheter placement as reported by the patient on a 0-10 scale where 0=no pain/discomfort and 10=worst imaginable pain/discomfort.

절차: Femoral Nerve Block vs. Psoas Compartment Nerve Block

Patients, undergoing hip arthroplasty or hip resurfacing will be randomized to one of two groups: femoral nerve block or psoas compartment nerve block. Patients randomized to femoral nerve block will receive this block prior to surgery. Patients randomized to psoas compartment nerve block will receive this block prior to surgery. Both patients will receive Mepivicaine via catheter prior to surgery and following surgery, Ropivicaine via pain pump.

Patient's mean pain score (NRS) during perineural infusion as measured by the nursing staff at UCSD and entered in the computer system.

Analgesic used, as reported by nursing staff in the UCSD computer system.

Patient's ambulation distance as recorded by therapist (occupational or physical) in the UCSD computer system.

Hip flexion, in degrees measured with a standard goneometer, as recorded by therapist (occupational or physical) in the UCSD computer system.

Infusion duration of pain pump, measured on the pump itself in hours and minutes.

Duration of hospital stay, in hours, as reported in the UCSD computer system.

Surgical/anesthetic adverse events as reported by hospital staff

Experiences of patient during the infusion and following, as reported to study staff in a phone conversation, one week following surgery.