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. 2021 Feb 24;44(6):976–981. doi: 10.1007/s00270-021-02789-2

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© The Author(s) 2021

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Fig. 6 — A Longitudinal US-scan illustrating the cutting of the TCL by retraction of the hook-knife (arrowheads). Hook (void arrowheads). The button tip cannula (arrows) which serves as a guiding tract, remains within the carpal tunnel during the whole release. B Axial US-scan depicting a successful release by “palpation” of the button tip cannula (arrow) through the transected TCL (dotted arrowheads). Median nerve (MN), ulnar artery (UA)