Does a Single Shot Femoral Nerve Block Alone Produce Appropriate Pain Relief?

Does a Single Shot Femoral Nerve Block Alone Produce Appropriate Pain Relief After Total Knee Arthroplasty or Should an Addition of Sciatic, Obturator and Lateral Femoral Cutaneous Nerve Blocks be Recommended?

The aim of this study is to compare the efficacy of the analgesic effect of the preoperative femoral nerve block alone versus combined femoral, sciatic, obturator and lateral femoral cutaneous nerve blocks in patients after TKA in the immediate postoperative period.

Bupivacaine will be used for all the nerve blocks.

Inclusion Criteria:

• ASA I-III
• Undergoing two TKA
• Understanding PCA protocol

Exclusion Criteria:

• Skin infection near injection site
• Allergy to local analgesics
• Peripheral neuropathy
• Coagulopathy
• Dementia
• Proven opioid dependency