Peri-operative SARS-CoV-2 infection increases postoperative mortality. The aim of this study was to determine the optimal duration of planned delay before surgery in patients who have had SARS-CoV-2 infection. This international, multicentre, prospective cohort study included patients undergoing elective or emergency surgery during October 2020. Surgical patients with pre-operative SARS-CoV-2 infection were compared with those without previous SARS-CoV-2 infection. The primary outcome measure was 30-day postoperative mortality. Logistic regression models were used to calculate adjusted 30-day mortality rates stratified by time from diagnosis of SARS-CoV-2 infection to surgery. Among 140,231 patients (116 countries), 3127 patients (2.2%) had a pre-operative SARS-CoV-2 diagnosis. Adjusted 30-day mortality in patients without SARS-CoV-2 infection was 1.5% (95%CI 1.4-1.5). In patients with a pre-operative SARS-CoV-2 diagnosis, mortality was increased in patients having surgery within 0-2 weeks, 3-4 weeks and 5-6 weeks of the diagnosis (odds ratio (95%CI) 4.1 (3.3-4.8), 3.9 (2.6-5.1) and 3.6 (2.0-5.2), respectively). Surgery performed ≥ 7 weeks after SARS-CoV-2 diagnosis was associated with a similar mortality risk to baseline (odds ratio (95%CI) 1.5 (0.9-2.1)). After a ≥ 7 week delay in undertaking surgery following SARS-CoV-2 infection, patients with ongoing symptoms had a higher mortality than patients whose symptoms had resolved or who had been asymptomatic (6.0% (95%CI 3.2-8.7) vs. 2.4% (95%CI 1.4-3.4) vs. 1.3% (95%CI 0.6-2.0), respectively). Where possible, surgery should be delayed for at least 7 weeks following SARS-CoV-2 infection. Patients with ongoing symptoms ≥ 7 weeks from diagnosis may benefit from further delay.

SARS-CoV-2 has been associated with an increased rate of venous thromboembolism in critically ill patients. Since surgical patients are already at higher risk of venous thromboembolism than general populations, this study aimed to determine if patients with peri-operative or prior SARS-CoV-2 were at further increased risk of venous thromboembolism. We conducted a planned sub-study and analysis from an international, multicentre, prospective cohort study of elective and emergency patients undergoing surgery during October 2020. Patients from all surgical specialties were included. The primary outcome measure was venous thromboembolism (pulmonary embolism or deep vein thrombosis) within 30 days of surgery. SARS-CoV-2 diagnosis was defined as peri-operative (7 days before to 30 days after surgery); recent (1-6 weeks before surgery); previous (≥7 weeks before surgery); or none. Information on prophylaxis regimens or pre-operative anti-coagulation for baseline comorbidities was not available. Postoperative venous thromboembolism rate was 0.5% (666/123,591) in patients without SARS-CoV-2; 2.2% (50/2317) in patients with peri-operative SARS-CoV-2; 1.6% (15/953) in patients with recent SARS-CoV-2; and 1.0% (11/1148) in patients with previous SARS-CoV-2. After adjustment for confounding factors, patients with peri-operative (adjusted odds ratio 1.5 (95%CI 1.1-2.0)) and recent SARS-CoV-2 (1.9 (95%CI 1.2-3.3)) remained at higher risk of venous thromboembolism, with a borderline finding in previous SARS-CoV-2 (1.7 (95%CI 0.9-3.0)). Overall, venous thromboembolism was independently associated with 30-day mortality ). In patients with SARS-CoV-2, mortality without venous thromboembolism was 7.4% (319/4342) and with venous thromboembolism was 40.8% (31/76). Patients undergoing surgery with peri-operative or recent SARS-CoV-2 appear to be at increased risk of postoperative venous thromboembolism compared with patients with no history of SARS-CoV-2 infection. Optimal venous thromboembolism prophylaxis and treatment are unknown in this cohort of patients, and these data should be interpreted accordingly.

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BACKGROUND: Treatment of complex anal fistula is challenging, often mandating multiple procedures. The gracilis muscle has been used to treat perineal fistulas and to repair perineal defects. OBJECTIVE: This study aims to report the results of gracilis muscle interposition for complex anal fistula, including prognostic factors for success. DESIGN: This is a retrospective analysis of a prospective database for patients who underwent gracilis muscle interposition for complex anal fistula from 2000 to 2018. SETTING: Patient demographics, operative data, and postoperative outcome were obtained from medical records. Office visits were used for follow-up. PATIENTS: All patients who underwent gracilis muscle interposition for complex anal fistula were included. Patients who underwent gracilis muscle interposition for reasons other than complex anal fistula were excluded. MAIN OUTCOME MEASURES: The primary outcome measured was the healing of complex anal fistula following gracilis muscle interposition and following additional procedures, when needed. RESULTS: A total of 119 patients (60 men, 59 women; median age: 56 (21–85) years) were included. The initial success rate of gracilis muscle interposition was 42%; the final success rate if additional procedures were undertaken was 92%. Overall success rate was 32.2% in women and 51.6% in men. Univariate analysis revealed that sex (p = 0.0315) and bed rest >3 days (p = 0.0078) were significant poor prognostic factors for failure, whereas the multivariate logistic regression model showed that length of bed rest >3 days was a significant poor prognostic factor for failure. In the female subgroup, multivariate analysis showed that bed rest ≥3 days was a significant poor prognostic factor, whereas in the male population there was no significant prognostic factor. LIMITATION: This study was limited by its retrospective nature and the heterogeneity of patients. CONCLUSION: Although initial success is <50%, the ultimate success after gracilis muscle interposition and other subsequent procedures is >90%. Patients must be preoperatively counseled that additional procedures will probably be required to achieve successful fistula closure. Furthermore, prolonged bed rest should be avoided after gracilis muscle interposition. See Video Abstract at http://links.lww.com/DCR/B551. INTERPOSICIÓN DEL MÚSCULO GRACILIS PARA EL TRATAMIENTO DE LA FÍSTULA ANAL COMPLEJA: EXPERIENCIA CON 119 PACIENTES CONSECUTIVOS ANTECEDENTES: El tratamiento de la fístula anal compleja es un desafío que a menudo requiere de múltiples procedimientos quirúrgicos. El músculo gracilis se ha utilizado para tratar fístulas y reparar defectos perineales. OBJETIVO: Informar los resultados de la interposición del músculo gracilis para la fístula anal compleja, incluyendo los factores pronósticos para un tratamiento exitoso. DISEÑO: Se efectuó un análisis retrospectivo obtenido de una base de datos prospectiva para pacientes sometidos a interposición del músculo gracilis por fístula anal compleja del 2000 al 2018. METODO: Los datos demográficos de los pacientes, la información del procedimiento quirúrgico y los resultados postoperatorios se obtuvieron de los expedientes clínicos; el seguimiento se llevó a cabo por medio de visitas al consultorio. PACIENTES: Se incluyeron todos los pacientes sometidos a interposición del músculo gracilis por fístula anal compleja; Se excluyeron los pacientes que se sometieron a interposición del músculo gracilis por motivos distintos a la fístula anal compleja. CRITERIOS DE EVALUACION DE LOS RESULTADOS: Curación de una fístula anal compleja después de la interposición del músculo gracilis y procedimientos adicionales, cuando fueron necesarios. RESULTADOS: Se estudiaron un total de 119 pacientes [60 hombres, 59 mujeres; con media de edad de 56 (21-85) años]. La tasa de éxito inicial de la interposición del músculo gracilis fue del 42%; La tasa de éxito final cuando realizaron procedimientos adicionales fue del 92%. La tasa de éxito global fue del 32,2% en mujeres y del 51,6% en hombres. El análisis univariado reveló que el género (p = 0,0315) y el reposo en cama > 3 días (p = 0,0078) en forma significativa fueron factores de pronóstico bajo para el fracaso, mientras que el modelo de regresión logística multivariable mostró que la duración del reposo en cama> 3 días fue un factor de pronóstico significativamente bajo para fracaso. En el subgrupo de mujeres, el análisis multivariado mostró que el reposo en cama ≥3 días fue un factor de pronóstico significativamente bajo, mientras que en la población masculina no hubo un factor pronóstico significativo. LIMITACIÓN: Carácter retrospectivo y heterogenicidad de los pacientes. CONCLUSIÓN: Aunque el éxito inicial es <50%, el éxito final después de la interposición del músculo gracilis y otros procedimientos posteriores es > 90%. Se debe aconsejar a los pacientes antes de la operación que probablemente se requieran procedimientos adicionales para lograr el cierre exitoso de la fístula. Además, debe evitarse el reposo prolongado en cama después de la interposición del músculo gracilis. Consulte Video Resumen en http://links.lww.com/DCR/B551.