Introduction. Carpal tunnel syndrome (CTS) is caused by the compression of the median nerves in the wrist. Patients have pain\nand numbness in the hands. According to the records of Songklanagarind Hospital from 2015 to 2018, of 800 patients, 196 or\n24.5% were treated with surgery. The novel tool of minimally invasive surgery for carpal tunnel syndrome (MIS-CTS) was\ndeveloped to improve effectiveness and safety. Purpose. This study was performed to the effectiveness of visualization during\nsurgery and the complete release of the transverse carpal ligament (TCL) and also the safety of using the MIS-CTS kits. Methods.\nTwenty fresh cadaveric forearms had surgery. Surgical techniques were (1) incision 15â??18mmat palmar hand; (2) the scissors and\nthe navigator were inserted to create working space underneath the palmar aponeurosis; (3) the visual enhancer was inserted. The\nvisual enhancer improves the visual field by shielding the soft tissue around the operative field; (4) the TCL was cut at the distal\nTCL by surgery scalpel, and then a flexible freer was used to detach the fibrous tissue from the median nerve and the TCL; and (5)\nthe TCL cutting blade was pushed straight to cut the TCL completely from distal to proximal. TCL length was observed until the\ncomplete release. The median nerve and the recurrent branch of the median nerve were observed. Results. All TCL were cut\ncompletely. All median nerves, recurrent branches of the median nerve, and superficial palmar arches could be observed during\nthe operation, and none were injured. This technique showed effectiveness and safety for minimally invasive carpal tunnel surgery.\nConclusions. The study found that the new device, MIS-CTS kits, along with this technique is effective for CTS release in terms of\nminimally invasive open carpal tunnel surgery.
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