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BACKGROUND Although percutaneous trigger digit release is common, controversy exists regarding its safety. The purpose of this study was to evaluate the feasibility and safety of the neurovascular displacement by local hydraulic dilatation (LHD) during percutaneous trigger digit release. MATERIAL AND METHODS Ten cadaver hands with 50 digits were dissected in this anatomical study. The distance between bilateral neurovascular bundles in each digit was measured before LHD and after LHD. The difference between the measured data before LHD and those after LHD in the same digit was compared to assess the feasibility of the neurovascular displacement by LHD. A further 81 patients with 106 trigger digits were treated by percutaneous release with neurovascular displacement by LHD in our clinical series. All patients were followed for 12 months. During the follow-up period, the presence of any postoperative complication and patient satisfaction were recorded. RESULTS In our anatomical study, there was a statistically significant difference (p&lt;0.05) comparing the average distance of bilateral neurovascular bundles before LHD with that after LHD. In the current series, no complications, such as digital neurovascular injury or recurrence of trigger, were encountered. On subjective assessment, 80/81 patients (98.8%) with 105/106 digits (99.1%) were graded as satisfactory with complete resolution of symptoms by percutaneous release under LHD. CONCLUSIONS Based on our study anatomical and clinical results, the neurovascular displacement by LHD may be a feasible adjunctive technique that may play a role in increasing the safety of percutaneous trigger digit release.

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The Safety of Percutaneous Trigger Digit Release Increased by Neurovascular Displacement with Local Hydraulic Dilatation: An Anatomical and Clinical Study