Efecto de la pandemia de COVID-19 en pacientes no COVID-19 que ingresan por Guardia en el Servicio de Cirugía, durante la fase estricta de la pandemia en Buenos Aires. Un estudio de cohorte / Effect of the COVID-19 pandemic on non-COVID-19 patients admitted from the emergency department to the surgical ward during the strict phase of the pandemic in Buenos Aires. A cohort study

RESUMEN Antecedentes: Aun en estado de cuarentena, las patologías de urgencia de Cirugía General requieren una evaluación y resolución inmediata. Objetivo: Analizar los ingresos, los resultados quirúrgicos y la gravedad de la enfermedad en los ingresos sin COVID-19, durante los primeros meses de la pandemia. Objetivos secundarios, subanálisis de patologías quirúrgicas habituales, como apendicitis, enfermedad de las vías biliares, diverticulitis y tumores complicados. Materiales y métodos: Se realizó un estudio observacional, ambispectivo, sobre una cohorte prospectiva de pacientes que consultaron por patología quirúrgica de guardia y requirieron hospitalización entre el 20 de marzo y el 31 de julio de 2020 correspondiente al Grupo Pandemia (GP), analizados y comparados con una cohorte del mismo período de 2019, Grupo Control (GC). Resultados: En el GP, en comparación con el GC, se registró un aumento en el número de pacientes ingresados (346 versus 305, p = 0,157), un aumento en el porcentaje de casos moderados-graves (58,1% versus 48,8%, p= 0,018), en el tiempo transcurrido desde el inicio de la presentación de los síntomas hasta la consulta (48 versus 24 horas, p< 0,001, en el tiempo desde el diagnóstico hasta la cirugía (23 versus 7 horas, p< 0,001), y en el tiempo operatorio (75 versus 60 minutos, p< 0,001). No hubo diferencias significativas en las complicaciones posoperatorias. Conclusión: Durante la pandemia se observaron cambios desfavorables en las características de la población analizada en relación a la pre pandemia, pero sin impacto en la morbimortalidad posoperatoria, demostrando que fue posible mantener los resultados quirúrgicos a pesar del retraso en la consulta.

ABSTRACT Background: Emergency general surgery conditions require immediate evaluation and timely resolution, even during quarantine. Objective: to analyze variations in admissions, surgical outcomes and severity of the disease in non- COVID-19 emergency admissions during the first months of the pandemic. Secondary objectives, to performed a sub-analysis of common surgical conditions, as appendicitis, biliary tract disease, diverticulitis and complicated tumors. Material and methods: An observational, ambispective study was carried out on a prospective cohort of patients who consulted with on-call surgical pathology and required hospitalization from March 20th, 2020 until July 31, 2020 referred to as Pandemic Group (PG), analyzed and compared with the same period of 2019, Control Group (CG). Results: We experienced an increase in the number of patients admitted at the ED during the pandemic PG vs CG (346 versus 305, p 0.157). Patients in the PG were found to be significantly more ill (58.1% versus 48,8%, p 0.018). A significant delay was found globally in both, time from onset of symptoms presentation to consultation (48 hours versus 24 hours, p < 0.001), and time from diagnosis to surgery (23 hours versus 7 hours, p < 0.001) in the PG, and an increase in the mean operative time (75 versus 60 minutes, p= 0,001). There was no significant difference in postoperative complications. Conclusion: During the pandemic we observed an increase in urgent surgical procedures due to biliary pathology and gastrointestinal tumors. The patients consulted with more advanced stages of disease, but this had no impact on postoperative morbidity or mortality, demonstrating that it was possible to maintain surgical outcomes despite delayed consultation.

Percutaneous Balloon Dilatation for Hepaticojejunostomy Stricture Following Paediatric Liver Transplantation: Long-Term Results of an Institutional "Three-Session" Protocol.

PURPOSE: The aim of this study was to report the long-term results of an institutional protocol of percutaneous biliary balloon dilatation (PBBD) on paediatric patients with benign anastomotic stricture after liver transplantation. As a secondary objective, we evaluated risk factors associated with post-treatment re-stricture. MATERIALS AND METHODS: Fourteen paediatric, post-liver transplant patients with benign anastomotic stricture of Roux-en-Y hepaticojejunostomy were included. All patients underwent the same treatment protocol of three PBBD procedures with 15-day intervals. Clinical outcome was analysed using the Terblanche classification. Primary patency rate was assessed with the Kaplan-Meier test. RESULTS: All patients had an initial successful result (Terblanche grade, excellent/good) after PBBD. At the end of the follow-up time of 35.7 ± 21.1 months (CI95%, 23.5-47.9), 10 patients persisted with excellent/good grading, while the remaining 4 had re-stricture, all of the latter occurring within the first 19 months. Patency rate after percutaneous treatment at 1, 3, and 5 years were 85.7%, 70%, and 70%, respectively. History of major complication after liver transplantation was associated with 5 times higher risk of re-stricture, HR 5.48 [95% CI, 2.18-8.78], p = 0.018. CONCLUSION: In paediatric patients with benign anastomotic stricture of hepaticojejunostomy after liver transplantation, the "Three-session" percutaneous biliary balloon dilatation protocol is associated with a high rate of long-term success. In this limited series, the history of post-liver transplant major complication, defined as complications requiring a reintervention under general anaesthesia or advanced life support, seems to be an independent risk factor for stricture recurrence.

Impact of Cholestasis on the Sensitivity of Percutaneous Transluminal Forceps Biopsy in 93 Patients with Suspected Malignant Biliary Stricture.

PURPOSE: The aim of this study was to determine the effect of hyperbilirubinemia in the sensitivity of percutaneous transluminal forceps biopsy (PTFB) in patients with suspected malignant biliary stricture. MATERIALS AND METHODS: Ninety-three patients with suspicion of malignant biliary stricture underwent percutaneous transhepatic cholangiography followed by PTFB. Sensitivity, specificity and predictive values were analysed based on the presence or absence of hyperbilirubinemia, defined as total bilirubin equal to, or higher than 5 mg/dL. Variables included demographic and clinical features, laboratory, tumour type and localization, stricture length, therapeutic approach and histopathology. Additionally, major morbidity and mortality were assessed. RESULTS: The overall sensitivity, specificity, positive predictive value and accuracy of PTFB were 61.1%, 100%, 100%, and 62.4%, respectively. Hyperbilirubinemia affected 57% of patients at the time of PTFB. There were 35 (37%) false negative results, none of them related to tumour type or localization, stricture length, or previous biliary intervention (i.e. PBBD (percutaneous biliary balloon dilatation), ERCP (endoscopic retrograde cholangiopancreatography)) (p > 0.05). However, when bilirubin was < 5 mg/dL, false negative results decreased globally (p = 0.024) and sensitivity increased significantly for intrahepatic and hilar localization, as well as for colorectal metastasis, gallbladder carcinoma, and pancreatic carcinoma. No major morbidity occurred. CONCLUSION: The sensitivity of percutaneous transluminal biopsy for diagnosis of malignant stricture may significantly increase if samples are obtained in the absence of hyperbilirubinemia, without adding morbidity to the procedure. LEVEL OF EVIDENCE: Level 3, Case- Control studies.

Fluoroscopy and endoscopy-guided transanastomotic rendezvous: a novel technique for recanalization of a completely obstructed colorectal anastomosis.

BACKGROUND: Colorectal anastomotic stricture is a frequent complication that may affect up to 30% of patients. However, a complete obstruction is rare. Endoscopic balloon dilation is the first-line therapy, but it invariably requires being able to cross the stricture with the dilation device. When this is not possible, surgical revision is the alternative, but it is associated with higher morbidity. CASE PRESENTATION: A 76-year-old male patient underwent an urgent high anterior resection with transverse loop colostomy for an occlusive high rectal tumor. On postoperative day 8, he presented with anastomotic leakage and abscess formation, requiring percutaneous drainage. Ten months after surgery, a colonoscopy revealed a complete stricture of the anastomosis, refractory to negotiation of a guide wire, thus precluding balloon dilation. Hence, a modified rendezvous technique was planned. Simultaneously, a flexible endoscope and a rigid rectoscope were progressed through the distal loop colostomy, and the anus, respectively. A needle device was introduced through the rectoscope and used to pierce the colonic stump. A guide wire was progressed, and the stricture was dilated with a controlled radial expansion balloon catheter. Finally, a 12-Fr Foley catheter was left through the anastomosis. A total of three endoscopic balloon dilation sessions were completed, and successful colostomy reversal was carried out 10 days after the last session. CONCLUSION: Fluoroscopy-endoscopy-guided recanalization is an effective and safe treatment option for complete colorectal anastomotic stricture.

Cambios en el Programa de Formación Quirúrgica en la era COVID-19 / Changes in the Surgical Training Program in the COVID-19 era

La aparición de esta nueva enfermedad por coronavirus 2019 (COVID-19) ha generado un gran impacto dentro de los equipos de salud, obligando a realizar cambios profundos en la actividad diaria. Estas modificaciones están orientadas a promover un ambiente de trabajo seguro para el personal médico y no médico. Sin embargo, algunos de esos cambios pueden tener consecuencias sobre el proceso de aprendizaje de los médicos en formación. El desafío que enfrenta un Servicio de Cirugía de un Hospital Universitario es mantener la continuidad de los programas formativos asegurando a la vez la seguridad de los médicos residentes. En este comunicado se describen los cambios realizados en el Programa de la Residencia de Cirugía General en un Hospital Universitario, orientados a brindar la misma calidad educativa, en un entorno seguro durante el transcurso de esta pandemia.

The appearance of this new coronavirus 2019 disease (COVID-19) has generated a great impact within health teams, forcing profound changes in the daily activity. These modifications are aimed at promoting a safe work environment for medical and non-medical personnel. However, some of these changes may have consequences on the learning process of doctors in training. The challenge faced by a Surgery Service of a University Hospital is to maintain the continuity of the training programs while ensuring the safety of Residents. This report describes the changes made to the General Surgery Residency Program at a university hospital, aimed at providing the same educational quality, in a safe environment during the course of this pandemic.

COVID-19: Reestructuración de emergencia e impacto de la pandemia en una Sección de Cirugía Mininvasiva Guiada por Imágenes / Emergency restructuring and impact of the pandemic in an Image-Guided Minimally Invasive Surgery Section

Antecedentes: La enfermedad por coronavirus-19 (COVID-19) ha forzado cambios en todas las facetas de los sistemas de salud. En este artículo se describen las modificaciones realizadas en la Sección de Cirugía Miniinvasiva Guiada por Imágenes (CIGIM) del Hospital Italiano de Buenos Aires, para promover la seguridad y el bienestar del personal manteniendo la capacidad de respuesta a la demanda asistencial y académica. Material y métodos: Las medidas incluyeron la reorganización del personal, el manejo de los procedimientos electivos y de urgencia, las consultas ambulatorias, así como la actividad docente y de investigación. También se analizó comparativamente la variación interanual (2019-2020) de los pacientes atendidos (procedimientos percutáneos y consultas ambulatorias) entre el 20 de marzo y el 10 de mayo de cada año. Resultados: La Sección CIGIM fue reorganizada en rotaciones semanales de 3 actividades, con distanciamiento estricto entre sus miembros, y hasta el momento ninguno resultó afectado. Los pacientes operados y las consultas realizadas durante el período estudiado 2019 vs. 2020 disminuyeron significativamente: 136 vs. 57 operados y 102 vs. 39 consultas; p < 0,0001. Las plataformas virtuales se utilizaron con éxito para mantener la actividad de pregrado, incluyendo cursadas de alumnos de grado de Medicina de dos universidades, el programa de residencia de Cirugía General y reuniones científicas; en dicho período se produjeron 3 trabajos científicos para publicación. Conclusiones: La disminución de la demanda asistencial, la reorganización de los grupos de trabajo y las plataformas virtuales pueden resultar estrategias y herramientas valiosas para afrontar la pandemia por COVID-19.

Background: Coronavirus-19 disease (COVID-19) has forced changes in all facets of health systems. This article describes the modifications made in the Image-Guided Minimally Invasive Surgery Section (CIGIM) of the Hospital Italiano de Buenos Aires, to promote the safety and well being of personnel while maintaining the ability to respond to academic and healthcare demand. Material and methods: Measures included reorganization of staff, management of elective and emergency procedures, outpatient consultations, as well as teaching and research activity. The inter-annual variation (2019-2020) of the patients attended (percutaneous procedures and outpatient consultations) between March 20 and May 10 of each year was also analyzed comparatively. Results: The CIGIM Section was reorganized into weekly rotations of 3 activities, with strict distancing among its members, and so far none have been affected. The operated patients and the consultations made during the analyzed period of 2019 vs. 2020 decreased significantly: 136 vs. 57 operated and 102 vs. 39 consultations; p <0.0001. Virtual platforms were successfully used to maintain undergraduate activity, including courses taken by medical students from two universities, the General Surgery residency program and scientific meetings; In this period, 3 scientific papers were written for publication. Conclusions: Dealing with healthcare demand, reorganizing working groups and virtual platforms can be valuable strategies and tools to confront the COVID-19 pandemic.

Percutaneous Patency Recovery and Biodegradable Stent Placement in a Totally Occluded Hepaticojejunostomy After Paediatric Living Donor Liver Transplantation.

Biliary complications after living donor liver transplantation (LDLT) cause severe morbidity and mortality, with biliary anastomotic stricture being the most common form of presentation. Surgical revision is risky, and it is avoided whenever possible. When a Roux-en-Y hepaticojejunostomy (RYHJ) is used for bilioenteric reconstruction, endoscopic approach is more difficult, if not impracticable. Therefore, percutaneous approach remains as a first-line treatment in these patients. In this case presentation, a percutaneous approach was used to recover patency in an intractable, totally occluded RYHJ stricture in an LDLT paediatric recipient, using a Rösch-Uchida needle to access to the collapsed jejunal loop from the bile duct. Once recanalization of the RYHJ was achieved, a biodegradable stent was placed with middle-term patency at follow-up.

Risk factors and outcomes of pyogenic liver abscess in adult liver recipients: a matched case-control study.

BACKGROUND: Adult liver recipients (ALR) differ from the general population with pyogenic liver abscess (PLA) as they exhibit: reconstructed biliary anatomy, recurrent hospitalizations, poor clinical condition and are subjected to immunosuppression. The aim of this study was to identify risk factors associated with PLA in ALR and to analyze the management experience of these patients. METHODS: Between 1996 and 2016, 879 adult patients underwent liver transplantation (LT), 26 of whom developed PLA. Patients and controls were matched according to the time from transplant to abscess in a 1 to 5 relation. A logistic regression model was performed to establish PLA risk factors considering clusters for matched cases and controls. Risk factors were identified and a multivariate regression analysis performed. RESULTS: Patients with post-LT PLA were more likely to have lower BMI (p = 0.006), renal failure (p = 0.031) and to have undergone retransplantation (p = 0.002). A history of hepatic artery thrombosis (p = 0.010), the presence of Roux en-Y hepatojejunostomy (p < 0.001) and longer organ ischemia time (p = 0.009) were independent predictors for the development of post-LT PLA. Five-year survival was 49% (95%CI 28-67%) and 89% (95%CI 78%-94%) for post-LT PLA and no post-LT PLA, respectively (p < 0.001). CONCLUSION: history of hepatic artery thrombosis, the presence of hepatojejunostomy and a longer ischemia time represent independent predictors for the development of post-LT PLA. There was a significantly poorer survival in patients who developed post-LT PLA compared with those who did not.

Percutaneous Biliary Balloon Dilation: Impact of an Institutional Three-Session Protocol on Patients with Benign Anastomotic Strictures of Hepatojejunostomy.

BACKGROUND: Percutaneous biliary balloon dilation (PBBD) stands as a safe, useful, and inexpensive treatment procedure performed on patients with benign anastomotic stricture of Roux-en-Y hepatojejunostomy (BASH). However, the optimal mode of application is still under discussion. METHODS: A retrospective cohort study was conducted including patients admitted between 2008 and 2015 with diagnosis of BASH. Patients were divided into 2 groups: group I (n = 22), included patients treated after the implementation of an institutional protocol of 3 PBBD sessions within a fixed time interval and group II (n = 24) consisted of our historical control of patients who underwent one or 2 dilation sessions. Patency at one-year post procedure was assessed with the classification proposed by Schweizer. Symptomatic response to treatment was analyzed using the Terblanche classification. RESULTS: Patients in group I exhibited more excellent/good results (90 vs. 50%, p = 0.003) and less poor results (5 vs. 42%, p = 0.005) according to the Schweizer classification and more grade I/excellent results according to Terblanche classification (p = 0.003). Additionally, group I showed lower serum total bilirubin (p = 0.001), direct bilirubin (p = 0.002), alkaline phosphatase (p = 0.322), aspartate aminotransferase (p = 0.029), and alanine aminotransferase (p = 0.006). CONCLUSION: A protocol of 3 consecutive PBBD sessions within a fixed time interval may yield a high rate of patency, with a positive clinical, biochemical, and radiological impact on patients with BASH.

Hepatobiliary scintigraphy to evaluate liver function in associating liver partition and portal vein ligation for staged hepatectomy: Liver volume overestimates liver function.

BACKGROUND: Associating liver partition and portal vein ligation for staged hepatectomy (ALPPS) induces a rapid and extensive increase in liver volume. The functional quality of this hypertrophic response has been called into question because ALPPS is associated with a substantial incidence of liver failure and high perioperative mortality. This multicenter study aimed to evaluate functional liver regeneration in contrast to volumetric liver regeneration in ALPPS, using technetium-99m hepatobiliary scintigraphy and computed tomography volumetry, respectively. METHODS: Patients who underwent ALPPS and hepatobiliary scintigraphy in 6 centers were included. Hepatobiliary scintigraphy data were analyzed centrally at the Academic Medical Center in Amsterdam according to established protocols. Increase in liver function as measured by hepatobiliary scintigraphy after stage 1 of ALPPS was compared with the increase in liver volume. In addition, we analyzed the impact of liver function and volume on postoperative outcomes including liver failure, morbidity, and mortality. RESULTS: In 60 patients, future liver remnant volume increased by a median 78% (interquartile range 48-110) during a median 8 (interquartile range 6-14) days after stage 1, while function as measured by hepatobiliary scintigraphy increased by a median 29% (interquartile range 1-55) throughout 7 days (interquartile range 6-10) in the 27 patients with paired measurements. After stage 2 of ALPPS, liver failure occurred in 5/60 (8%) patients, severe complications in 24/60 (40%), and mortality occurred in 4/60 (7%). CONCLUSION: In ALPPS, volumetry overestimates liver function as measured by hepatobiliary scintigraphy and may be responsible for the high rate of liver failure. Quantitative liver function tests are highly recommended to avoid post hepatectomy liver failure.

Survival after associating liver partition and portal vein ligation for staged hepatectomy (ALPPS) for advanced colorectal liver metastases: A case-matched comparison with palliative systemic therapy.

BACKGROUND: Associating liver partition and portal vein ligation for staged hepatectomy (ALPPS) allows the resection of colorectal liver metastases with curative intent which would otherwise be unresectable and only eligible for palliative systemic therapy. This study aimed to compare outcomes of ALPPS in patients with otherwise unresectable colorectal liver metastases with matched historic controls treated with palliative systemic treatment. METHODS: All patients with colorectal liver metastases from the international ALPPS registry were identified and analyzed. Survival data were compared according to the extent of disease. Otherwise unresectable ALPPS patients were defined by at least 2 of the following criteria: ≥6 metastasis, ≥2 future remnant liver metastasis, ≥6 involved segments excluding segment 1. These patients were matched with patients included in 2, phase 3, metastatic, colorectal cancer trials (CAIRO and CAIRO2) using propensity scoring in order to compare survival. RESULTS: Of 295 patients with colorectal liver metastases in the ALPPS registry, 70 patients had otherwise unresectable disease defined by the proposed criteria. Two-year overall survival was 49% and 72% for patients with ≥2 and <2 criteria, respectively (P = .002). Median disease-free survival was 6 months compared to 12 months (P < .001) in the ≥2 and <2 criteria groups, respectively. Median overall survival was comparable between ALPPS patients with ≥2 criteria and case-matched patients who received palliative treatment (24.0 vs 17.6 months, P = .088). CONCLUSION: Early oncologic outcomes of patients with advanced liver metastases undergoing ALPPS were not superior to results of matched patients receiving systemic treatment with palliative intent. Careful patient selection is essential in order to improve outcomes.

Pyogenic liver abscess: current status and predictive factors for recurrence and mortality of first episodes.

BACKGROUND: In times of modern surgery, transplantation and percutaneous techniques, pyogenic liver abscess (PLA) has essentially become a problem of biliary or iatrogenic origin. In the current scenario, diagnostic approach, clinical behavior and therapeutic outcomes have not been profoundly studied. This study analyzes the clinical and microbiological features, diagnostic methods, therapeutic management and predictive factors for recurrence and mortality of first episodes of PLA. METHODS: A retrospective single-center study was conducted including 142 patients admitted to the Hospital Italiano de Buenos Aires, between 2005 and 2015 with first episodes of PLA. RESULTS: Prevailing identifiable causes were biliary diseases (47.9%) followed by non-biliary percutaneous procedures (NBIPLA, 15.5%). Seventeen patients (12%) were liver recipients. Eleven patients (7.8%) died and 18 patients (13.7%) had recurrence in the first year of follow up. The isolation of multiresistant organisms (p = 0.041) and a history of cholangitis (p < 0.001) were independent risk factors for recurrence. Mortality was associated with serum bilirubin >5 mg/dL (p = 0.022) and bilateral involvement (p = 0.014) in the multivariate analysis. CONCLUSION: NBPLA and PLA after transplantation may be increasing among the population of PLA in referral centers. History of cholangitis is a strong predictor for recurrence. Mortality is associated to hiperbilirrubinemia and anatomical distribution of the lesions.