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Intraoperative Surgeon-Performed vs. Conventional Anesthesiologist-Performed Continuous Adductor Canal Block In Total Knee Arthroplasty: A Randomized Controlled Trial

Intraoperative Surgeon-Performed vs. Conventional Anesthesiologist-Performed Continuous Adductor Canal Block In Total Knee Arthroplasty: A Randomized Controlled Trial

Chayut Chaiperm, MD, THAILAND Srihatach Ngarmukos, MD, THAILAND Aree Tanavalee, MD, THAILAND Chotetawan Tanavalee, MD, THAILAND Wirinaree Kampitak, MD, THAILAND

King Chulalongkorn memorial hospital , Bangkok, THAILAND


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Summary: The surgeon-performed cACB during surgery was feasible and reproducible with similar VAS scores and functional outcomes during hospitalization to anesthesiologist cACB.


Background

A continuous adductor canal block (cACB) for pain control in total knee arthroplasty (TKA) is always performed by an anesthesiologist. The aim is to determine effectiveness of a surgeon-performed cACB in terms of feasibility, reproducibility, and efficacy.

Methods

This study was divided into 2 phases. In Phase 1 study, an experimental dissection of 16 cadaveric knees to expose the Saphenous nerve and related muscles around the adductor canal was conducted. The extent of dye after injection via a catheter inserted into the adductor canal at the time of TKA was evaluated. In phase II, an RCT study comparing clinical outcomes between surgeon-performed (Group 1) and anesthesiologist-performed cACB (Group 2) during TKA in 63 patients was evaluated. The visual analog scale (VAS) at rest and during movement at several time points and functional outcomes during hospitalization were compared.

Results

The phase I study demonstrated surgeon-performed cACB during surgery feasible and reproducible with consistent dye extension into the adductor canal after injection via a catheter. In the phase II study, 29 patients of Group 1 and 30 patients of Group 2 completed the evaluation with no differences in baseline parameters. The VAS during movement at 24 and 36 hours, quadriceps strength, time up and go test, and knee motion at different time points, and total morphine consumption showed no differences between both groups. There were no procedure-related complications.

Conclusion

The surgeon-performed cACB during surgery was feasible and reproducible with similar VAS scores and functional outcomes during hospitalization to anesthesiologist cACB.


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