Incidence of obstetric anal sphincter injuries according to the type of forceps used in the Mexican population.

OBJECTIVE: This study describes the frequency of obstetric anal sphincter injuries (OASIS) in patients after instrumental delivery according to the type of forceps used. METHODS: A retrospective comparative cohort study was conducted on patients who underwent instrumental delivery from January 2017 to April 2022. The primary outcome was the presence of OASIS following delivery. Patients were categorized into Cohort A if only rotation forceps were used, Cohort B for only traction forceps, and Cohort C if both types were used sequentially. Statistical analysis was performed with SPSS (IBM, New York, NY) with χ2, Fisher's exact, and analysis of variance testing. A P-value <0.05 was considered significant. RESULTS: OASIS occurred in 45 of 328 instrumental deliveries. OASIS after rotation forceps occurred in 12.9% (n = 8) of cases, after traction forceps in 13.2% (n = 34), and after sequential use of rotation and traction forceps in 37.5% (n = 3) of cases (p = 0.141). An odds ratio (OR) of 0.91 (95% confidence interval [CI] 0.40-2.08) for OASIS was obtained with the use of rotation forceps, 0.81 (95% CI 0.38-1.70) for traction forceps, and 3.97 (95% CI 0.91-17.2) for the sequential use of rotation and traction forceps. CONCLUSION: There were no significant differences in the presence of OASIS comparing traction and rotation forceps. A non-significant trend of higher OASIS following the sequential use of traction and rotation forceps was observed.

Fascitis necrosante genital posterior a parto instrumentado: reporte de un caso / Genital necrotizing fasciitis after operative vaginal delivery: A case report

Resumen ANTECEDENTES: La fascitis necrosante es una infección rara del tejido subcutáneo y la fascia que rápidamente puede complicarse y poner en riesgo la vida; por esto siempre debe tenerse en mente la posibilidad de este diagnóstico. OBJETIVO: Describir un caso raro de fascitis necrosante genital aparecida luego de un parto instrumentado. CASO CLÍNICO: Paciente primigesta, de 30 años, con antecedente de infección vaginal por Ureaplasma. El parto instrumentado tuvo lugar a las 39 semanas; se reparó la episiotomía medio-lateral derecha, sin complicaciones, y se dio de alta del hospital a las 48 horas. Al quinto día de puerperio acudió a Urgencias por dolor perineal intenso y fiebre. Durante la auscultación se encontró un hematoma perineal y glúteo derecho, con eritema alrededor, indurado y con crepitación vaginal, con secreción hematopurulenta fétida. Reportes de laboratorio: leucocitosis y anemia. Los cultivos de la herida reportaron infección polimicrobiana. El ultrasonido pélvico evidenció dos colecciones debidamente delimitadas en planos dérmicos y musculares. Se indicó tratamiento con antibióticos de amplio espectro, lavado quirúrgico y desbridamiento quirúrgico diario durante 5 días. Después, se inició la terapia de cierre asistido por vacío (VAC) durante 7 días hasta lograr la granulación. Se continuó con lavados quirúrgicos durante 5 días más. El día 18 posparto se cerró la herida sin complicaciones. A la sexta semana de seguimiento la herida había cicatrizado, sin dolor, ni incontinencia fecal o urinaria: solo hipoestesia de la cicatriz, pero con evolución satisfactoria. CONCLUSIÓN: Lo ideal es establecer el diagnóstico lo más temprano posible para disminuir la morbilidad y mortalidad, ofrecer inmediatamente atención multidisciplanaria que permita conseguir los mejores desenlaces quirúrgicos e incrementar la supervivencia.

Abstract BACKGROUND: Necrotizing fasciitis is a rare infection of the subcutaneous tissue and the fascia that is rapidly progressive and deadly, requiring early and aggressive surgical debridement to decrease mortality. The objective of this study was to describe a rare case of genital necrotizing fasciitis after operative vaginal delivery. CLINICAL CASE: A 30 years old primiparous woman with a history of vaginal infection by Ureaplasma. Instrumented delivery was attended at 39 weeks, repairing right mid-lateral episiotomy without complications and discharge after 48 hours. On the fifth day of the puerperium she went to the emergency department for severe perineal pain and fever, finding perineal hematoma and right gluteus with erythema around, indurated and with vaginal crepitation with fetid hemato-purulent secretion. The laboratories reported leukocytosis and anemia, wound cultures showed polymicrobial infection and pelvic ultrasound diagnosed 2 well-defined collections in dermal and muscular planes. Management was initiated with broad-spectrum antibiotics plus washing and daily surgical debridement for 5 days. Subsequently, it was placed with VAC therapy for 7 days until granulation was achieved; and then, surgical washes were continued for 5 more days. On the 18th day, the wound was closed without complications. In her sixth week of follow-up she has a scarred wound, without pain or fecal or urinary incontinence; only refers to hypoesthesia of the scar, but with satisfactory evolution. CONCLUSION: The ideal is to establish the diagnosis as early as possible to decrease morbidity and mortality, immediately offer multidisciplinary care that allows the best surgical outcomes to be achieved, and increases survival.