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Objective To evaluate the effectiveness and safety of percutaneous micro-invasive release therapy by using push-cut knife on stenosal tendosynovitis. Methods The patients with stenosal tendosynovitis were chosen according to inclusion criteria, and then divided, based on random digital table and 1: 1 of random concealmert, into push-cut knife group and needle-knife group. The push-cut knife group was given push-cut knife therapy one time，and was given traditional needle-knife one time. The main outcome index was cure rate on the 27 th week after treatment, and secondary indexes included pain scores, joint range of motion (ROM) and trigger indications. The safety indexes included complications and adverse events. Results There were totally 120 patients were chosen, but one quitted due to serious disease in needle-knife group, and 119 patients completed the study and were brought into the statistical analysis of outcome indexes. On the 27th week after treatment, there were 55 cases (91. 67%) cured in push-cut knife group and 39 (66. 10%) cured in needle-knife group (P <0. 001). The indexes of trigger indications，pain and ROM were significantly relieved in 2 groups，and improved more significantly over time. The comparisons at the time points of the 1st，3rd，6th，12th and 27th weeks showed that, the reliefs of trigger indications，pain and ROM were superior in push-cut knife group than those in needleknife group (P <0.05). There were no adverse events or complications occurred in 2 groups. Conclusion The push-cut knife has higher one-off cure rate in treatment of stenosal tendosynovitis. The signs of pain，ROM and trigger indications are relieved immediately after treatment，and continuously relieved after half year. There are no adverse events occurred. [ABSTRACT FROM AUTHOR]

Objective: To explore the efficacy of ultrasound-guided needle-knife with precise three-dimensional stereotactic localization of ashi points for stenosing tenosynovitis of flexor tendon (trigger finger)., Methods: A total of 74 patients were randomly divided into an observation group and a control group, 37 cases in each group. The patients in the observation group were treated with ultrasound-guided intrathecal injection and releasing method of needle-knife, while the patients in the control group were treated with ultrasound-guided intrathecal injection. The self-made 9-score scale of trigger finger was recorded before treatment, immediately after treatment, 1 month and 3 months after treatment; the curative effect of the two groups was evaluated., Results: The results of self-made 9-score scale in the observation group immediately after treatment, 1 month and 3 months after treatment were lower than that before treatment (all P <0.01); the scores in the observation group were lower than those in the control group at each time point after treatment (all P <0.01). The excellent and good rate immediately after treatment was 100.0% (37/37) in the observation group, which was superior to 8.1% (3/37) in the control group ( P <0.05); the cured rates in the observation group were 100.0% (37/37) 1 month after treatment and 97.3% (36/37) 3 months after treatment, which were superior to 13.5% (5/37) and 10.8% (4/37) in the control group, respectively ( P <0.05)., Conclusion: The needle-knife with three-dimensional stereotaxic location of ashi point could significantly improve the symptoms of trigger finger, with superior immediate and long-term efficacy.

Objective: To investigate the clinical effects of located needle knife in the treatment of trigger finger., Methods: The clinical data of 133 patients(145 fingers) with trigger finger underwent treatment with located needle knife from September 2010 to March 2014 were retrospectively analyzed. There were 37 males(40 fingers) and 96 females (105 fingers), aged from 18 to 71 years old with a mean of 51.8 years. Course of disease was from 1 to 19 months with an average of 8.2 months. Affected fingers included 82 thumbs, 12 index fingers, 11 middle fingers, 36 ring fingers, and 4 little fingers. According to the standard of Quinnell grade, 42 fingers were grade III, 92 fingers were grade IV, and 11 fingers were grade V. Firstly the double pipe gab was put into the distal edge of hypertrophic tendon sheath, then small knife needle was used to release the sheath proximally along the tendon line direction. The informations of wound healing and nerve injury, postoperative finger function, finger pain at 6 months were observed., Results: The operation time was from 8 to 25 min with an average of 9.8 min. All the patients were followed up from 6 to 26 months with an average of 12.5 months. No complications such as the wound inflammation and seepage, vascular or nerve injuries were found. According to the standard of Quinnell grade, 123 fingers got excellent results, 15 good, 7 poor., Conclusions: It's a good choice to treat trigger finger with located needle knife in advantage of minimal invasion, simple safe operation, and it should be promoted in clinic., Competing Interests: The authors of this article and the planning committee members and staff have no relevant financial relationships with commercial interests to disclose.