OBJECTIVE: To explore a new surgical management of multiple fingers degloving injury. METHODS: In 1994 to 1997, 47 cases with multiple fingers degloving injury were sutured by two reverse "s"-type skin flaps on abdominal flank. RESULTS: The skin flaps in 46 cases survived and the wounds obtained primary heal. CONCLUSION: The application of abdominal flank "s"-type skin flap is reliable and convenient in the treatment of multiple fingers degloving injury.
In order to realize the quantitative assessment of muscle strength in hand function rehabilitation and then formulate scientific and effective rehabilitation training strategies, this paper constructs a multi-scale convolutional neural network (MSCNN) - convolutional block attention module (CBAM) - bidirectional long short-term memory network (BiLSTM) muscle strength prediction model to fully explore the spatial and temporal features of the data and simultaneously suppress useless features, and finally achieve the improvement of the accuracy of the muscle strength prediction model. To verify the effectiveness of the model proposed in this paper, the model in this paper is compared with traditional models such as support vector machine (SVM), random forest (RF), convolutional neural network (CNN), CNN - squeeze excitation network (SENet), MSCNN-CBAM and MSCNN-BiLSTM, and the effect of muscle strength prediction by each model is investigated when the hand force application changes from 40% of the maximum voluntary contraction force (MVC) to 60% of the MVC. The research results show that as the hand force application increases, the effect of the muscle strength prediction model becomes worse. Then the ablation experiment is used to analyze the influence degree of each module on the muscle strength prediction result, and it is found that the CBAM module plays a key role in the model. Therefore, by using the model in this article, the accuracy of muscle strength prediction can be effectively improved, and the characteristics and laws of hand muscle activities can be deeply understood, providing assistance for further exploring the mechanism of hand functions.
ObjectiveTo observe the effectiveness of the forearm free arterialized venous flap in repairing soft tissue defect of the hand. MethodsBetween December 2008 and January 2013, 49 cases of soft tissue defects of the hand were treated. There were 39 males and 10 females, aged 16-52 years (mean, 34 years). Defect was caused by crush injury in 34 cases, cutting injury in 7 cases, avulsion injury in 5 cases, and hot crush injury in 3 cases. The locations were index finger in 21 cases, middle finger in 14 cases, ring finger in 10 cases, little finger in 1 case, and the first web space and the dorsal palm in 3 cases. The duration of injury and admission was 2-10 hours (mean, 4.5 hours). The size of defects ranged from 2.5 cm×1.5 cm to 6.0 cm×4.5 cm. Of them, 46 cases had fracture of metacarpal or finger bone and/or injury of tendon and nerve. Emergency operation was performed in 43 cases and selective operation in 6 cases. All defects were repaired by free arterialized venous flap from the ipsilateral forearm, in which the proximal ends of veins were anastomosed to artery and vein of the finger. The flap size ranged from 3.5 cm×2.5 cm to 7.5 cm×5.3 cm. The donor site was directly sutured. ResultsSeven flaps survived which was similar to physiological free flap. Mild or medium swelling and blister were observed in 39 flaps and heavy swelling and partial necrosis occurred in 3 flaps after operation. The patients were followed up 6 months-2 years (mean, 13.5 months). The flaps had soft texture, slightly bulky appearance, and deeper color than normal skin. At last follow-up, the two-point discrimination was 16-22 mm (mean, 20 mm). According to the standard for functional evaluation issued by Hand Surgery Association of Chinese Medical Association, the results were excellent in 21 cases, good in 21 cases, fair in 3 cases, and poor in 4 cases. ConclusionIt is an ideal method to repair soft tissue defect of the hand to use forearm free arterialized venous flap. It has the advantages of massive area, no major blood vessel needed to be sacrificed, safe and easy operation, and satisfactory appearance.
OBJECTIVE: To investigate the clinical effect of skin flaps repairing severe thermopressure injury of hand. METHODS: From January 1989 to December 1998, 112 patients with severe thermopressure injury of hand were repaired by various skin flaps transfer, the size of skin flaps was 6 cm x 8 cm to 12 cm x 18 cm. Postoperative patients were treated by combined rehabilitation in early stage. RESULTS: All the flaps were survived with satisfactory effect. Sixty-six patients were followed up 6 to 12 months, skin flaps all showed better colour and texture, and function of the hand was satisfactory. CONCLUSION: Different skin flaps are adopted to repair severe thermopressure injury of the hand according to different skin defects of the hand, combined early rehabilitation treatment, to achieve good recovery of function and appearance of the hand to the greatest extent.
Objective To explore the effectiveness of the improved pedicled superficial iliac circumflex artery flap for repairing serious wound of the hand and forearm. Methods Between June 2008 and June 2011, 13 cases of serious wound of the hand and forearm were treated. There were 9 males and 4 females with a mean age of 41 years (range, 23-64 years). The disease causes included twist injury by machine in 2 cases, wire rope squeezed injury in 4 cases, traffic accident injury in 3 cases, crushing injury in 2 cases, high voltage electrical injury in 1 case, and snake bites in 1 case. There were 10 cases of fresh wounds and 3 cases of infection and necrosis wounds, and all had bone and tendon exposure. The skin and soft tissue defects ranged from 7 cm × 3 cm to 22 cm × 6 cm. The pedicled iliac artery flap was used in 8 cases, and pedicled iliac artery composite flap in 5 cases. The flap size ranged from 12 cm × 4 cm to 27 cm × 8 cm, with the flap pedicle of 2-4 cm wide strip and 3-5 cm wide fascia. Results The pedicle of flap was cut at 3 weeks in 12 patients, and at 4 weeks in 1 patient who had partial avulsion and hemorrhage at 1 week after operation. All flaps survived and incisions at donors and wounds healed by first intention. Eleven patients were followed up 6-36 months (mean, 20 months). The flap color and texture were good; 3 bulky flaps were observed, and satisfactory appearance was achieved after skin flap thinning. After 6 months, the protective sensation recovered in all cases; according to the Hand Surgery Society of Chinese Medical Association evaluation of upper extremity function trial standard for total active motion of the fingers, the results were excellent in 9 cases, good in 1 case, and poor in 1 case. Conclusion Improved fascia pedicled superficial iliac circumflex artery skin flap can repair serious hand and forearm injury, which is easy-to-operate and less injury at donor site.
ObjectiveTo investigate the effectiveness of modified dorsal metacarpal artery reverse island flap based on two adjacent recurrent branches of dorsal metacarpal arteries in repairing large skin defect of the hand. Methods Between September 2017 and March 2021, 15 cases of large skin defect of the hand were treated. There were 11 males and 4 females with an average age of 42 years (range, 24-66 years). The injury causes included machine twist injury in 6 cases, pound injury in 5 cases, and crush injury in 4 cases. The injured parts included 6 cases of finger skin defect and 9 cases of distal skin defect of palm and dorsum of hand, all of which had tendon, joint, and bone exposure. The interval from injury to operation ranged from 2 to 6 hours (mean, 4 hours). The defect sizes after thorough debridement ranged from 3.5 cm×3.0 cm to 8.0 cm×4.5 cm. The modified dorsal metacarpal artery reverse island flap with a range of 3.8 cm×3.3 cm to 9.0 cm×5.0 cm was used to repair the defect, and the flap donor site was repaired with full-thickness skin graft. ResultsAll the flaps survived successfully after operation, and the wounds in the recipient site and the skin grafts in the donor site healed by first intention. All patients were followed up 9-24 months, with an average of 14 months. The appearance of the flap was good, and its texture and color were similar to those of the surrounding normal tissue. There was no obvious scar contracture, depression, and pigmentation in the donor site. At last follow-up, the static two-point discrimination of the flap was 8-20 mm, with an average of 13.6 mm. According to the Michigan Hand Outcome Questionnaire, 5 patients were very satisfied with the appearance of the flap, and 10 patients were satisfied. Conclusion The modified dorsal metacarpal artery reverse island flap based on two adjacent recurrent branches of dorsal metacarpal arteries has reliable blood supply, larger harvested area, simple procedure, and minimal donor site damage, which is suitable for emergency repair of large skin defect of the hand.