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Objective:To explore indications for replantation of proximal proper digital artery and establishing extrinsic arterial perfusion pressure in the treatment of special type of severed digits with avulsion over 12.0 hours of warm ischemia, and to analyse the factors that affected the survival rate of the replanted digits.Methods:From September 2014 to January 2022, 8 patients with severed digits and prolonged warm ischemia were treated by transposition of adjacent digital artery together with the technique of extrinsic arterial perfusion pressure in the Department of Wrist and Hand Surgery, the Orthopaedic Hospital in Sichuan Province. During the operation, the defected proximal proper digital artery was reconstructed and repaired with vein graft, one side of the digital artery was repaired with an inverted "Y" vein graft, and one side of "Y" vein was bridged and anastomosed to repair the original digital artery. On the other side, the adjacent proximal proper digital arteries were transpositioned and anastomosed to gain an extrinsic arterial perfusion pressure, which increased the distal haemodynamic and reconstituted the blood supply. Of the 8 patients (9 severed digits) : 1 had severed index and middle fingers, 2 had severed index fingers, 4 had severed thumbs and 1 had severed little finger. All the patients were males, aged 16-63 years old, at 37.6 years old in average. Warm ischemia time of the severed digits were 12.3-20.6 hours, with 17.4 hours in average. The survival rate of replanted digits was observed after surgery. Postoperative follow-ups were conducted through telephone or WeChat reviews.Results:Follow-up time was 6-26 months, at 8.3 months in average. Retrospective analysis was performed. Vascular compromises occurred in 3 patients 4 digits (arterial insufficiency in 1 digit, venous congestion in 3 digits), skin necrosis occurred in 1 patient (1 digit) and digit necrosis in 1 patient (1 digit). Overall, 8 of the 9 replanted digits survived. According to the Replantation Function Evaluation Standard of Hand Surgery Association of Chinese Medical Association, the digit function after replantation was evaluated at excellent in 6 digits, good in 1 digit and poor in 1 digit.Conclusion:For a severed digit with an ischemia time over 12.0 hours, the survival rate can be improved by transposition of an adjacent digital artery to provided extrinsic arterial perfusion pressure.
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@#Replantation of fingers is highly complex and technically challenging. Surgeons are serious with their selection criteria as many factors are involved in determining good surgical outcome. Improper storages of amputated parts are usually denied the option for replantation. We report a 42-year-old lady who was assaulted with a machete and presented with total amputation of left thumb. The amputated thumb was stored in a plastic bag directly on ice cubes which eventually melted; thumb immersed in water for two hours. On examination, the amputated thumb was neither macerated nor frozen. Replantation was attempted and was successful. There are limited reports on proper methods of storage of amputated fingers pertaining to daily practical scenario. Yet, it is a strict criterion for surgeons in attempting replantation. Direct contact of amputated fingers on ice and immersion in hypotonic solutions leads to irreversible tissue damage. In our case, two hours of unfavourable storage did not affect surgical outcome. In conclusion, clinical assessment of the amputated part is essential in deciding for replantation. Combination of direct contact with ice and immersion in hypotonic solution for two hours should not be a contraindication for replantation.
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PURPOSE: There are multiple dependent variables commonly attributed to survival of replanted digits. The ischemia time is thought to be a clinically relevant factor. However, controversy exists as large hand centers have reported successful replant outcomes independent of ischemic time. In this study, we present a single institution experience on the effect of ischemia time on the survival of completely amputated digits. METHODS: A retrospective review of a single institution experience was performed. This cohort included all comers who had suffered complete amputation of a digit (Zone 2-4) and underwent replantation from 2003 to 2009. Demographic information as well as injury mechanism, ischemic time, and replantation outcome were recorded for each patient. Chi-square was used to analyze the result. RESULTS: Mean age was 35.5 years old(2-69). Mean replantation survival was 89.5%(37/317). Survival rates were 94, 88, and 88% in respective groups of 0~6, 6~12, of >12 hours of ischemia time. In chi-square analysis, there was no difference with p value of 0.257. No other independent patient factors showed statistically significant relationship to replant survival rate. In the group with longest ischemia time(12~18 hours) replant survival rate was 88% (37/42). CONCLUSION: Prolonged ischemia time is commonly believed to be a contributing factor for replant survival. However, our experience has shown that survival rate is uniform up to 18 hours of ischemia.
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Humanos , Amputação Cirúrgica , Estudos de Coortes , Dedos , Mãos , Isquemia , Reimplante , Estudos Retrospectivos , Taxa de SobrevidaRESUMO
@#Patients replanted severed finger generally have negative emotion after operation. Negative mood could induce vascular crisis and reduce survival of replanting finger. This paper reviewed the studies on negative emotion and psychological intervention in patients after digit replantation in various stages post-operation, and prospected the future.