A randomized controlled trial of three different local anesthetic methods for minor hand surgery

Abstract

Purpose: Hemostasis and local anesthetic injection are essential for minor hand surgeries under local anesthesia (LA). Wide awake local anesthesia no tourniquet (WALANT) became popular for achieving hemostasis without a tourniquet. However, a recent study reported that injection is more painful than tourniquet use in minor hand surgery. Therefore, this study aimed to compare three LA methods that differ according to injection and hemostasis, namely, the combination of a tourniquet and buffered lidocaine solution (CTB), WALANT, and conventional LA. Methods: This randomized prospective single-center study included 169 patients who underwent minor hand surgery between 2017 and 2020. We randomly allocated the patients to each group and recorded the pain and anxiety score during the surgery, as well as satisfaction after the surgery. Results: Pure lidocaine injection was significantly more painful than buffered lidocaine and WALANT solution injection ( p < 0.001). Local anesthesia injection was significantly more painful than tourniquet use in all groups ( p < 0.001). The intraoperative anxiety score was significantly lower in the CTB group than in the conventional LA and WALANT groups ( p < 0.001). The satisfaction score was significantly higher in the CTB and WALANT groups than in the conventional LA group ( p < 0.001). Conclusion: CTB for minor hand surgery under LA is associated with less injection pain and patient anxiety. The tourniquet is tolerable without much pain and waiting time. Thus, CTB in minor hand surgery is a good alternative to WALANT and conventional LA.

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Reply Letter to the Editor regarding “A randomized controlled trial of three different local anesthetic methods for minor hand surgery”

“…Our study was begun from this idea. 1 As your comment, injection solution's temperature and injection speed have impact on pain while giving LA injection. However, we are carefully concern about stability of buffered lidocaine when warming solution.In previous study, buffered lidocaine dropped to 66.1% of initial concentrations after 4 weeks when stored at 25°C.…”

“…Therefore, we recommend to use “hole-in-one” injection technique which is introduced in our article. 1,3…”