RESUMO
Reconstructive surgery to the lips requires the replacement of defective tissues with similarly functioning tissues. While non-dynamic free tissue transfers provide adequate lower lip reconstruction, improved benefits may be obtained with innervated free muscle flaps. This study reports the use of innervated serratus anterior muscle free flaps for lip reconstruction in five patients. All patients had squamous cell carcinoma of either the upper or lower lip. After resection of the tumours, the resultant defects comprised two-thirds of the lips. The innervated serratus anterior muscle free flap was transferred to the lip and an end-to-end vascular anastomosis on the facial artery was performed. The marginal mandibular branch of the facial nerve was preferred for nerve coaptation. The inner and outer surfaces of the flaps were grafted with a split-thickness skin graft. Concentric needle electromyography of the orbicularis oris and frontal muscles was performed for all patients in the preoperative, postoperative, and follow-up periods. All patients survived the surgical operation. Three patients achieved perfect oral sphincter function without drooling. Electromyography at 1 year postoperative demonstrated the successful reinnervation of the serratus anterior muscle. This study demonstrates that lip reconstruction using an innervated serratus anterior muscle free flap is a reliable method, providing a functional lower lip.
Assuntos
Carcinoma de Células Escamosas/cirurgia , Retalhos de Tecido Biológico/inervação , Neoplasias Labiais/cirurgia , Músculo Esquelético/transplante , Procedimentos de Cirurgia Plástica/métodos , Idoso , Idoso de 80 Anos ou mais , Anastomose Cirúrgica , Feminino , Humanos , Excisão de Linfonodo , Masculino , Pessoa de Meia-Idade , Músculo Esquelético/inervação , Biópsia de Linfonodo Sentinela , Resultado do TratamentoRESUMO
The management of Viperidae snake bites of the hand is discussed from an assessment of the results of snake bite treatments in our clinic. Between 2010 and 2012, 23 patients presenting with venomous snake bites were admitted. None of the patients received a blood transfusion or underwent fasciotomy. There were no severe sensitivity reactions owing to the snake antivenom; however, one patient required a surgical procedure. Repetition of antivenom therapy is necessary to decrease the complication rate in patients with venomous snake bites. Moreover, the use of a peripheral vasodilator may decrease the complication rates in cases where the bite is on the digits.