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In situ Transverse Rectus Abdominis Myocutaneous Flap: A Rat Model of Myocutaneous Ischemia Reperfusion Injury
Published on: June 8, 2013
[Effect of length-width ratio on partial necrosis in distally based sural neurofasciocutaneous flap: 157 cases]
Zhonggen Dong1, Jianwei Wei, Lihong Liu
1Department of Orthopeadics, Second Xiangya Hospital, Central South University, Changsha 410011, China.
Objective:
To explore the effect of length-width ratio (LWR)on partial necrosis in distally based sural neurofasciocutaneous flap.
Methods:
Clinical data and operative pictures of 157 distally based sural neurofasciocutaneous flaps were reviewed and analysed. LWR of the flaps ranged from 2.83:1 to 7.14:1. Based on the LWR of the flaps, the flaps were divided into 5 groups: Group A(LWR≤3:1), Group B(3:1
Results:
Of the 157 flaps, 125 survived uneventfully, 8 had distal epidermical necrosis, wound dehiscence occurred in 6 flaps, 18 flaps(11.5%) had distal partial necrosis. Partial necrosis occurred in none of the 6 flaps in Group A(0%), 4 of 26 flaps in Group B(12.5%), 2 of 56 flaps in Group C (3.6%), 8 of 50 flaps in Group D (16.0%), and 4 of 19 flaps in Group E(21.5%). There were no statistical differences in partial necrosis ratio between Group A and B, Group B and C, Group D and E(P>0.05). Partial necrosis ratio was higher in Group D than that in Group C(P<0.05). It was lower in the LWR<5:1 group (Group A+Group B+Group C) (6.8%, 6/88) than that in the LWR≥5:1 group (Group D+Group E) (17.4%, 12/69) (P<0.05).
Conclusion:
When LWR of the flap is less than 5:1, probability of partial necrosis occurring in distally based sural neurofasciocutaneous flaps is low, and the flap can survive more reliably. The maximum LWR of the surrival flaps can reach 6-7:1.
