ABSTRACT
STUDY DESIGN: A retrospective study. PURPOSE: Our objectives were to determine the association between the pathological changes of disc herniation and the interval between primary and revision surgeries and to investigate the frequency and site of the dural laceration in the primary and revision surgeries. OVERVIEW OF LITERATURE: Among 382 patients who underwent microsurgical lumbar discectomy, we investigated 29 who underwent revision surgery to analyze recurrent herniation pathologies and complications to determine the manner in which lumbar disc herniation can be more efficiently managed. METHODS: Of 29 patients, 22 had recurrent disc herniation at the same level and site. The pathological changes associated with compression factors were classified into the following two types depending on intraoperative findings: (1) true recurrence and (2) minor recurrence with peridural fibrosis (>4 mm thickness). The sites of dural laceration were examined using video footage and operative records. RESULTS: The pathological findings and days between the primary and revision surgeries showed no statistical difference (p=0.14). Analysis of multiple factors, revealed no significant difference between the primary and revision surgery groups with regard to hospital days (p=0.23), blood loss (p=0.99), and operative time (p=0.67). Dural lacerations obviously increased in the revision surgery group (1.3% vs. 16.7%, p < 0.01) and were mainly located near the herniated disc in the primary surgery group and near the root shoulder in the revision surgery group, where severe fibrosis and adhesion were confirmed. To avoid dural laceration during revision surgery, meticulous decompressive manipulation must be performed around the root sleeve. CONCLUSIONS: We recommend that meticulous epidural dissection around the scar formation must be performed during revision surgery to avoid complications.
Subject(s)
Humans , Cicatrix , Diskectomy , Fibrosis , Intervertebral Disc Displacement , Lacerations , Operative Time , Pathologic Processes , Pathology , Recurrence , Reoperation , Retrospective Studies , ShoulderABSTRACT
Apesar de ser pouco estudada, a lesão dural é uma complicação séria das fraturas toracolombares em explosão, podendo levar a uma herniação dos elementos neurais posteriores através da dura-máter lesada e possível encarceramento das raízes nervosas, ocasionando, à longo prazo, dor crônica, disfunção para vida diária do paciente, piora neurológica ou até mesmo dificuldade de melhora clínica. Realizou-se um estudo com objetivo de determinar se o aumento da abertura interpedicular na radiografia em ântero-posterior é um fator preditivo de lesão dural. Foram analisados 72 pacientes portadores de fratura toracolombar em explosão que foram submetidos a procedimento cirúrgico de descompressão e estabilização da coluna toracolombar. Foram coletados dados epidemiológicos, radiográficos, tomográficos e a presença ou não de lesão dural durante o ato operatório. A porcentagem de abertura interpedicular no Rx em ântero-posterior foi estatisticamente significante para predizer a lesão dural (p = 0,001). Sendo que aqueles pacientes que apresentaram lesão dural apresentavam uma média de abertura interpedicular de 0,30 cm em contraste com 0,19 cm dos que não tinham esta lesão. Portanto, o aumento da distância interpedicular na radiografia em ântero-posterior foi um fator preditivo de lesão dural.