Hyperbaric oxygen therapy increases the effect of 5-fluorouracil chemotherapy on experimental colorectal cancer in mice.

Tumor hypoxia may compromise the results of chemotherapy for treating colorectal cancer because it stimulates angiogenesis and the release of tumor growth factors. Hyperbaric oxygen (HBO) supplementation may potentiate the effects of chemotherapy in such cases. This study aimed to assess the effect of HBO therapy combined with chemotherapy on the treatment of colorectal cancer in mice. C57BL6 mice were submitted to the intrarectal instillation of N-methyl-N-nitrosoguanidine (MNNG) and treated with 5-fluorouracil (5FU) and/or HBO therapy. The MNNG group presented the highest dysplastic crypt rate. The 5FU + HBO group presented the highest rate of apoptotic cells per dysplastic crypt. The 5FU group presented the highest expression of hypoxia-inducible factor-1 alpha and CD44. HBO therapy increased the effect of 5FU on the treatment of the experimental colorectal neoplasia in mice.

Factors associated with surgical resection in patients with Crohn's disease: long-term evaluation.

PURPOSE: To evaluate patient characteristics and factors associated with surgical resection in patients with Crohn's disease (CD). METHODS: An analysis was performed on data from 295 patients with CD in follow-up from 2001 to 2018. Medical record data comprised age, gender, location, behavior and duration of the CD, smoking, and extraintestinal manifestation. Patients were divided into two groups according to the presence or absence of surgical resection. RESULTS: Out of the 295 patients with CD, 155 underwent surgical resection (53.2% male, mean age: 43.88 ± 14.35 years). The main indications for surgery were stenosis (44.5%), clinical intractability (15.5%), and intra-abdominal fistulas (15.5%). Smoking (p < 0.001), longer CD duration (p < 0.0001), ileo-colonic location (p = 0.003), stenosing behavior (p < 0.0001), and fistulizing behavior (p < 0.0001) were significantly associated with surgical resection. Initial use of biological was significantly more frequent in the group of patients without surgical resection (p < 0.001). CONCLUSIONS: Patients with CD still frequently need surgical treatment. Smoking (current or past), longer disease time, stenosing and fistulizing behavior, and ileo-colonic localization in CD patients were associated with a higher risk of surgery. Awareness about factors associated with unfavorable outcome allows such patients to be treated more appropriately.

Leukocyte dysfunction and reduced CTLA-4 expression are associated with perianal Crohn's disease.

Although perianal Crohn's disease (PCD) is highly associated with the exacerbated inflammation, the molecular basis and immunological signature that distinguish patients who present a history of perianal lesions are still unclear. This paper aims to define immunological characteristics related to PCD. In this cross-sectional observational study, we enrolled 20 healthy controls and 39 CD patients. Blood samples were obtained for the detection of plasma cytokines and lipopolysaccharides (LPS). Peripheral blood mononuclear cells (PBMCs) were phenotyped by flow cytometry. Leukocytes were stimulated with LPS or anti-CD3/anti-CD28 antibodies. Our results show that CD patients had augmented plasma interleukin (IL)-6 and LPS. However, their PBMC was characterized by decreased IL-6 production, while patients with a history of PCD produced higher IL-6, IL-8, and interferon-γ, along with decreased tumor necrosis factor alpha (TNF). CD patients had augmented FoxP3 and cytotoxic T lymphocyte-associated antigen 4 (CTLA-4) regulatory markers, though the PCD subjects presented a significant reduction in CTLA-4 expression. CTLA-4 as well as IL-6 and TNF responses were able to distinguish the PCD patients from those who did not present perianal complications. In conclusion, IL-6, TNF, and CTLA-4 exhibit a distinct expression pattern in CD patients with a history of PCD, regardless of disease activity. These findings clarify some mechanisms involved in the development of the perianal manifestations and may have a great impact on the disease management.

Factors associated with surgical resection in patients with Crohn's disease: long-term evaluation

Purpose: To evaluate patient characteristics and factors associated with surgical resection in patients with Crohn's disease (CD). Methods: An analysis was performed on data from 295 patients with CD in follow-up from 2001 to 2018. Medical record data comprised age, gender, location, behavior and duration of the CD, smoking, and extraintestinal manifestation. Patients were divided into two groups according to the presence or absence of surgical resection. Results: Out of the 295 patients with CD, 155 underwent surgical resection (53.2% male, mean age: 43.88 ± 14.35 years). The main indications for surgery were stenosis (44.5%), clinical intractability (15.5%), and intra-abdominal fistulas (15.5%). Smoking (p < 0.001), longer CD duration (p < 0.0001), ileo-colonic location (p = 0.003), stenosing behavior (p < 0.0001), and fistulizing behavior (p < 0.0001) were significantly associated with surgical resection. Initial use of biological was significantly more frequent in the group of patients without surgical resection (p < 0.001). Conclusions: Patients with CD still frequently need surgical treatment. Smoking (current or past), longer disease time, stenosing and fistulizing behavior, and ileo-colonic localization in CD patients were associated with a higher risk of surgery. Awareness about factors associated with unfavorable outcome allows such patients to be treated more appropriately.

Evaluation of the response rate to neoadjuvant chemoradiotherapy in patients with rectal adenocarcinoma: a retrospective long-term study in two terciary reference centers

Objectives: To evaluate the complete response (CR) rate and surgeries performed in patients with rectal adenocarcinoma who underwent neoadjuvant therapy (NT) at Hospital das Clínicas da Faculdade de Medicina da Universidade de São Paulo and at Hospital São Paulo, in Ribeirão Preto, from January 2007 to December 2017. Methods: We evaluated 166 medical records of patients with locally advanced rectal adenocarcinoma (T3, T4 or N+) who underwent NT. The regimen consisted of performing conventional (2D) or conformational (three-dimensional-3D/ radiotherapy with modulated intensity - IMRT) at a dose of 45-50.4Gy associated with capecitabine 1650mg/m2 or 5-fluorouracil (5FU) and leucovorin (LV). The following variables were analyzed: gender, age, pretreatment stage, radiotherapy, CR index, local and distant recurrence rates. Surgical treatment and complications were also evaluated. Results: The CR index was 28.3%. Patients treated with 3D/IMRT radiotherapy had a higher rate of CR (36.3% x 4.8%; p < 0.001), higher rates of clinical follow-up (21% x 0%; p < 0.001), lower surgery rates (79% x 100%; p < 0.001), higher rates of transanal resection (37.1% x 9.5%; p = 0.001), lower rates of abdominal rectosigmoidectomy (25.8% x 50%; p = 0.007) and lower rates of abdominoperineal resection of the rectum (16.1% x 40.5%; p = 0.002), when compared to patients treated with 2D radiotherapy. Conclusion Modern radiotherapy techniques such as 3D conformal and IMRT, by offering greater adequacy and precision of treatment, could result in better local control and less toxicity in organs at risk, enabling organ preservation strategies and less invasive approaches in selected cases. (AU)

Leukocytoclastic Vasculitis Secondary to Anti-Tumor Necrosis Factor Therapy in Inflammatory Bowel Diseases: A Multicenter Retrospective Cohort Study.

BACKGROUND: Vasculitis is an uncommon complication of biologics used to treat inflammatory bowel disease (IBD). This study describes a case series of vasculitis induced by anti-tumor necrosis factor (TNF) therapy in IBD patients. METHODS: Retrospective assessments were performed using the medical records of adult IBD patients who underwent outpatient clinical follow-ups between January 2010 and December 2019 in order to identify patients with vasculitis caused by anti-TNF therapy. RESULTS: There were 2442 patients altogether. Of these, 862 (35%) took anti-TNF medication. Five patients (0.6% of the overall patients; n = 3 (60%) Crohn's disease; n = 2 (40%), ulcerative colitis) were identified as having leukocytoclastic vasculitis (LCV) due to anti-TNF therapy; these patients were white, female, and non-smokers. The mean age of LCV diagnosis was 32.2 years, and the mean IBD duration was 7.2 years. The mean time between the start of biologic therapy and LCV onset was 30.8 months. Most of the patients were using adalimumab (80%; n = 4). All the patients were in remission at the time of the LCV diagnosis, and the vasculitis affected the skin in all cases. Anti-TNF therapy was discontinued in the five abovementioned patients, and the response of LCV to the oral steroids was significantly positive. Remarkably, all five patients experienced complete remission from LCV within 4-12 weeks after starting prednisone therapy, and none of them had LCV recurrence in the follow-up period (a mean duration of 28 months). CONCLUSIONS: LCV is an unusual complication of anti-TNF therapy in the IBD setting. In this context, clinicians should have a high degree of suspicion of LCV in patients who develop an unexplained cutaneous rash.

Retrospective analysis of surgical and oncological results of laparoscopic surgeries performed by residents of coloproctology.

INTRODUCTION: with the improvement and wide acceptance of laparoscopy in colorectal operations, there was a need for specific training of surgeons in training. There are few studies evaluating the postoperative results of laparoscopic colectomies performed by resident physicians and their impact on patient safety. PURPOSE: to analyze the surgical and oncological results of laparoscopic colectomies performed by coloproctology residents and compare them with data in the literature. METHODS: this is a retrospective analysis of patients undergoing laparoscopic colorectal surgery performed by resident physicians at the Hospital das Clínicas de Ribeirão Preto, between 2014 and 2018. The clinical characteristics of the patients were studied, as well as the main surgical and oncological aspects in a period of one year. RESULTS: we analyzed 191 operations, whose main surgical indication was adenocarcinoma, most of them stage III. The mean duration of surgeries was 210±58 minutes. There was a need for a stoma in 21.5% of the patients, mainly loop colostomy. The conversion rate was 23%, with 79.5% due to technical difficulties, and the main predictors of conversion were obesity and intraoperative accidents. The median length of stay was 6 days. Preoperative anemia was associated with a higher rate of complications (11.5%) and reoperations (12%). Surgical resection margins were compromised in 8.6% of cases. The one-year recurrence rate was 3.2% and the mortality rate was 6.3%. CONCLUSIONS: videolaparoscopic colorectal surgery performed by residents showed efficacy and safety similar to data found in the literature.

Retrospective analysis of surgical and oncological results of laparoscopic surgeries performed by residents of coloproctology / Análise retrospectiva dos resultados cirúrgicos e oncológicos em cirurgias videolaparoscópicas realizadas por residentes de coloproctologia

ABSTRACT Introduction: with the improvement and wide acceptance of laparoscopy in colorectal operations, there was a need for specific training of surgeons in training. There are few studies evaluating the postoperative results of laparoscopic colectomies performed by resident physicians and their impact on patient safety. Purpose: to analyze the surgical and oncological results of laparoscopic colectomies performed by coloproctology residents and compare them with data in the literature. Methods: this is a retrospective analysis of patients undergoing laparoscopic colorectal surgery performed by resident physicians at the Hospital das Clínicas de Ribeirão Preto, between 2014 and 2018. The clinical characteristics of the patients were studied, as well as the main surgical and oncological aspects in a period of one year. Results: we analyzed 191 operations, whose main surgical indication was adenocarcinoma, most of them stage III. The mean duration of surgeries was 210±58 minutes. There was a need for a stoma in 21.5% of the patients, mainly loop colostomy. The conversion rate was 23%, with 79.5% due to technical difficulties, and the main predictors of conversion were obesity and intraoperative accidents. The median length of stay was 6 days. Preoperative anemia was associated with a higher rate of complications (11.5%) and reoperations (12%). Surgical resection margins were compromised in 8.6% of cases. The one-year recurrence rate was 3.2% and the mortality rate was 6.3%. Conclusions: videolaparoscopic colorectal surgery performed by residents showed efficacy and safety similar to data found in the literature.

RESUMO Introdução: com o aperfeiçoamento e a ampla aceitação da laparoscopia nas operações colorretais, houve necessidade de treinamento específico dos cirurgiões em formação. Existem poucos estudos avaliando os resultados pós operatórios das colectomias videolaparoscópicas realizadas por médicos residentes e seu impacto na segurança do paciente. Objetivo: analisar os resultados cirúrgicos e oncológicos das colectomias videolaparoscópicas realizadas por residentes de coloproctologia e comparar com dados da literatura. Métodos: trata-se de uma análise retrospectiva de pacientes submetidos a cirurgias colorretais laparoscópicas, realizadas por médicos residentes do Hospital das Clínicas de Ribeirão Preto, entre 2014 e 2018. Foram estudadas as características clínicas dos pacientes bem como os principais aspectos cirúrgicos e oncológicos em um período de um ano. Resultados: analisou-se 191 operações, cuja principal indicação cirúrgica foi adenocarcinoma, a maioria estadio III. A duração média das cirurgias foi 210±58 minutos. Houve necessidade de estoma em 21,5% dos pacientes, principalmente colostomia em alça. A taxa de conversão foi 23%, sendo 79,5% por dificuldades técnicas, e os principais fatores preditores de conversão foram obesidade e acidentes intra-operatórios. A mediana do tempo de internação foi 6 dias. Anemia pré operatória associou-se a uma maior taxa de complicações (11,5%) e reoperações (12%). Houve comprometimento das margens de ressecção cirúrgica em 8,6% dos casos. A taxa de recidiva em um ano foi de 3,2%, e a taxa de mortalidade, 6,3%. Conclusões: a cirurgia colorretal videolaparoscópica realizada por residentes apresentou eficácia e segurança semelhante aos dados encontrados na literatura.

Postoperative Complications and Stoma Rates After Laparoscopic Resection of Deep Infiltrating Endometriosis with Bowel Involvement / Complicações pós-operatórias e taxas de estomia após ressecção laparoscópica de endometriose infiltrativa profunda com envolvimento intestinal

Abstract Objective The purpose was to assess the rates of postoperative complications and the need of temporary stoma of laparoscopic surgical treatment for bowel endometriosis in a referral center. Methods The surgical indication, type of operation, operative time, length of hospital stay, need for a temporary stoma, rate of conversion to open surgery, postoperative complications were evaluated. Results One-hundred and fifty patients were included. The average duration of surgery was significantly longer for segmental resection (151 minutes) than for disc excision (111.5 minutes, p < 0.001) and shaving (96.8 minutes, p < 0.001). Patients with segmental resection had longer postoperative lengths of hospital stay (1.87 days) compared with patients with disc excision (1.43 days, p < 0.001) and shaving (1.03 days, p < 0.001). A temporary stoma was performed in 2.7% of patients. Grade II and III postoperative complications occurred in 6.7% and 4.7% patients, respectively. Conclusion Laparoscopic intestinal resection has an acceptable postoperative complication rate and a low need for a temporary stoma.

Resumo Objetivo O objetivo foi avaliar as taxas de complicações pós-operatórias e a necessidade de estomia temporária do tratamento cirúrgico laparoscópico para endometriose intestinal em um centro de referência. Métodos Foram avaliados a indicação cirúrgica, tipo de operação, tempo operatório, tempo de internação, necessidade de estomia temporária, taxa de conversão para cirurgia aberta, complicações pós-operatórias. Resultados Cento e cinquenta pacientes foram incluídos. A duração média da cirurgia foi significativamente maior para a ressecção segmentar (151 minutos) do que para a excisão do disco (111,5 minutos, p < 0,001) e shaving (96,8 minutos, p < 0,001). Pacientes com ressecção segmentar tiveram maior tempo de internação pós-operatória (1,87 dias) em comparação com pacientes com excisão de disco (1,43 dias, p < 0,001) e shaving (1,03 dias, p < 0,001). Um estoma temporário foi realizado em 2,7% dos pacientes. Complicações pós-operatórias de grau II e III ocorreram em 6,7% e 4,7% dos pacientes, respectivamente. Conclusão A ressecção intestinal laparoscópica apresenta taxa aceitável de complicações pós-operatórias e baixa necessidade de estomia temporária.

Postoperative Complications and Stoma Rates After Laparoscopic Resection of Deep Infiltrating Endometriosis with Bowel Involvement.

OBJECTIVE: The purpose was to assess the rates of postoperative complications and the need of temporary stoma of laparoscopic surgical treatment for bowel endometriosis in a referral center. METHODS: The surgical indication, type of operation, operative time, length of hospital stay, need for a temporary stoma, rate of conversion to open surgery, postoperative complications were evaluated. RESULTS: One-hundred and fifty patients were included. The average duration of surgery was significantly longer for segmental resection (151 minutes) than for disc excision (111.5 minutes, p < 0.001) and shaving (96.8 minutes, p < 0.001). Patients with segmental resection had longer postoperative lengths of hospital stay (1.87 days) compared with patients with disc excision (1.43 days, p < 0.001) and shaving (1.03 days, p < 0.001). A temporary stoma was performed in 2.7% of patients. Grade II and III postoperative complications occurred in 6.7% and 4.7% patients, respectively. CONCLUSION: Laparoscopic intestinal resection has an acceptable postoperative complication rate and a low need for a temporary stoma.

OBJETIVO: O objetivo foi avaliar as taxas de complicações pós-operatórias e a necessidade de estomia temporária do tratamento cirúrgico laparoscópico para endometriose intestinal em um centro de referência. MéTODOS: Foram avaliados a indicação cirúrgica, tipo de operação, tempo operatório, tempo de internação, necessidade de estomia temporária, taxa de conversão para cirurgia aberta, complicações pós-operatórias. RESULTADOS: Cento e cinquenta pacientes foram incluídos. A duração média da cirurgia foi significativamente maior para a ressecção segmentar (151 minutos) do que para a excisão do disco (111,5 minutos, p < 0,001) e shaving (96,8 minutos, p < 0,001). Pacientes com ressecção segmentar tiveram maior tempo de internação pós-operatória (1,87 dias) em comparação com pacientes com excisão de disco (1,43 dias, p < 0,001) e shaving (1,03 dias, p < 0,001). Um estoma temporário foi realizado em 2,7% dos pacientes. Complicações pós-operatórias de grau II e III ocorreram em 6,7% e 4,7% dos pacientes, respectivamente. CONCLUSãO: A ressecção intestinal laparoscópica apresenta taxa aceitável de complicações pós-operatórias e baixa necessidade de estomia temporária.

PREVALENCE AND PREDICTIVE FACTORS ASSOCIATED WITH POSITIVITY OF SARS-COV-2 SEROLOGICAL MARKERS IN PATIENTS WITH INFLAMMATORY BOWEL DISEASE AT AN IBD REFERRAL CENTER.

BACKGROUND: Data related to SARS-CoV-2 exposure rates in patients with inflammatory bowel diseases (IBD) are scarce. Objective - Our aim was to determine the prevalence of serological markers of SARS-Cov-2 and the predictive factors for positivity in patients with IBD. METHODS: This is a cross-sectional, observational study carried out from May to September 2020. SARS-CoV-2 serological markers were determined using chemiluminescence immunoassay in 233 IBD patients without evidence of COVID-19 symptoms. Patient age was 36.6±11.1 years, 118 patients were male (50.6%), and 63.1% had Crohn's disease. Patient clinical data were extracted from individual electronic medical records and complemented by a structured interview. RESULTS: Twenty-six out of the 233 patients with IBD had positive serum markers for SARS-CoV-2 (11.2%). Female sex (P<0.003), extra-intestinal manifestations (P=0.004), use of corticosteroids (P=0.049), and previous contact with individuals with flu-like symptoms (P<0.001) or confirmed diagnosis of COVID-19 (P<0.001), were associated with a significant increased rate of positive SARS-Cov-2 serological markers. No significant difference was observed regarding to adherence to protection measures and positivity of SARS-Cov-2 serological markers (P>0.05). CONCLUSION: SARS-CoV-2 previous infection in IBD patients was not that uncommon, and its prevalence was 11.2% in our series. Positivity to SARS-CoV-2 serological markers was associated with female sex, extra-intestinal manifestations, use of corticosteroids, and contact with individuals with suspected or confirmed COVID-19. Studies with longer follow-up periods are needed to confirm these findings.

Anti-TNF therapy for ulcerative colitis in Brazil: a comparative real-world national retrospective multicentric study from the Brazilian study group of IBD (GEDIIB).

BACKGROUND: Anti-TNF therapy represented a landmark in medical treatment of ulcerative colitis (UC). There is lack of data on the efficacy and safety of these agents in Brazilian patients. The present study aimed to analyze rates of clinical and endoscopic remission comparatively, between adalimumab (ADA) and infliximab (IFX), in Brazilian patients with UC, and evaluate factors associated with clinical and endoscopic remission after 1 year of treatment. METHODS: A national retrospective multicenter study (24 centers) was performed including patients with UC treated with anti-TNF therapy. Outcomes as clinical response and remission, endoscopic remission and secondary loss of response were measured in different time points of the follow-up. Baseline predictive factors of clinical and endoscopic remission at week 52 were evaluated using logistic regression model. Indirect comparisons among groups (ADA and IFX) were performed using Student's t, Pearson χ2 or Fisher's exact test when appropriated, and Kaplan Meier analysis. RESULTS: Overall, 393 patients were included (ADA, n = 111; IFX, n = 282). The mean age was 41.86 ± 13.60 years, 61.58% were female, most patients had extensive colitis (62.40%) and 19.39% had previous exposure to a biological agent. Overall, clinical remission rate was 66.78%, 71.62% and 82.82% at weeks 8, 26 and 52, respectively. Remission rates were higher in the IFX group at weeks 26 (75.12% vs. 62.65%, p < 0.0001) and 52 (65.24% vs. 51.35%, p < 0.0001) when compared to ADA. According to Kaplan-Meier survival curve loss of response was less frequent in the Infliximab compared to Adalimumab group (p = 0.001). Overall, endoscopic remission was observed in 50% of patients at week 26 and in 65.98% at week 52, with no difference between the groups (p = 0.114). Colectomy was performed in 23 patients (5.99%). Age, non-prior exposure to biological therapy, use of IFX and endoscopic remission at week 26 were associated with clinical remission after 52 weeks. Variables associated with endoscopic remission were non-prior exposure to biological therapy, and clinical and endoscopic remission at week 26. CONCLUSIONS: IFX was associated with higher rates of clinical remission after 1 year in comparison to ADA. Non-prior exposure to biological therapy and early response to anti-TNF treatment were associated with higher rates of clinical and endoscopic remission.

Prevalêncıa e fatores predıtıvos assocıados à posıtıvıdade dos marcadores serológıcos do SARS-COV-2 em pacıentes com doença ınflamatórıa ıntestınal em um centro de referêncıa em DII / Prevalence and predictive factors associated with positivity of sars-cov-2 serological markers in patients with inflammatory bowel disease at an ibd referral center

ABSTRACT Background: Data related to SARS-CoV-2 exposure rates in patients with inflammatory bowel diseases (IBD) are scarce. Objective - Our aim was to determine the prevalence of serological markers of SARS-Cov-2 and the predictive factors for positivity in patients with IBD. Methods: This is a cross-sectional, observational study carried out from May to September 2020. SARS-CoV-2 serological markers were determined using chemiluminescence immunoassay in 233 IBD patients without evidence of COVID-19 symptoms. Patient age was 36.6±11.1 years, 118 patients were male (50.6%), and 63.1% had Crohn's disease. Patient clinical data were extracted from individual electronic medical records and complemented by a structured interview. Results: Twenty-six out of the 233 patients with IBD had positive serum markers for SARS-CoV-2 (11.2%). Female sex (P<0.003), extra-intestinal manifestations (P=0.004), use of corticosteroids (P=0.049), and previous contact with individuals with flu-like symptoms (P<0.001) or confirmed diagnosis of COVID-19 (P<0.001), were associated with a significant increased rate of positive SARS-Cov-2 serological markers. No significant difference was observed regarding to adherence to protection measures and positivity of SARS-Cov-2 serological markers (P>0.05). Conclusion: SARS-CoV-2 previous infection in IBD patients was not that uncommon, and its prevalence was 11.2% in our series. Positivity to SARS-CoV-2 serological markers was associated with female sex, extra-intestinal manifestations, use of corticosteroids, and contact with individuals with suspected or confirmed COVID-19. Studies with longer follow-up periods are needed to confirm these findings.

RESUMO Contexto: Dados relacionados às taxas de exposição ao SARS-CoV-2 em pacientes com doenças inflamatórias intestinais (DII) são escassos. Objetivo Nosso objetivo foi determinar a prevalência de marcadores sorológicos do SARS-Cov-2 e os fatores preditivos de positividade em pacientes com DII. Métodos: Este foi um estudo transversal observacional realizado no período de maio a setembro de 2020. Os marcadores sorológicos SARS-CoV-2 foram determinados por imunoensaio de quimioluminescência em 233 pacientes com DII sem evidência de sintomas de COVID-19. A idade dos pacientes foi 36,6±11,1 anos, 118 pacientes eram do sexo masculino (50,6%) e 63,1% tinham doença de Crohn. Os dados clínicos dos pacientes foram extraídos de prontuários médicos eletrônicos individuais e complementados por meio de uma entrevista estruturada. Resultados: Vinte e seis dos 233 pacientes com DII apresentaram marcadores sorológicos positivos para SARS-CoV-2 (11,2%). Sexo feminino (P<0,003), manifestações extra-intestinais (P=0,004), uso de corticosteroides (P=0,049) e contato prévio com indivíduos com sintomas gripais (P<0,001) ou diagnóstico confirmado de COVID -19 (P<0,001), foram associados a um aumento significativo da taxa de positividade para marcadores sorológicos do SARS-Cov-2. Não foi observada diferença significativa em relação à adesão às medidas de proteção e positividade dos marcadores sorológicos para o SARS-Cov-2 (P>0,05). Conclusão: A infecção prévia pelo SARS-CoV-2 não é tão incomum em pacientes com DII e sua prevalência em nossa série foi de 11,2%. A positividade aos marcadores sorológicos SARS-CoV-2 foi associada ao sexo feminino, manifestações extra-intestinais, uso de corticosteroides e contato com indivíduos com suspeita ou diagnóstico confirmado de COVID-19. Estudos com períodos de acompanhamento mais longos são necessários para confirmar esses achados.

TEACHING BASIC COLONOSCOPY SKILLS: QUALITY AND SAFETY STANDARDS CAN BE FULFILLED IN AN OUTPATIENT UNIVERSITY CENTER.

BACKGROUND: Recent studies have shown that endoscopy fellows can perform colonoscopy effectively and safely. However, little is known about the performance of surgical residents without prior knowledge of endoscopic techniques. OBJECTIVE: To assess whether quality indicators were met at an outpatient endoscopy center and whether surgical residents, without prior upper or lower endoscopy skills, could perform colonoscopy adequately. METHODS: A prospective non-randomized cohort study was undertaken. All exams were performed either by assistant physicians or by residents. Quality measures were compared between those groups. RESULTS: A total of 2720 colonoscopies were analyzed. In the resident group, we observed older patients (57.7±12.7 years vs 51.5±14.5 years, P<0.001), a higher prevalence of screening colonoscopies (52% vs 39.4%, P<0.001) and a higher prevalence of colorectal cancer (6.4% vs 1.8%, P<0.001). The cecal intubation rate was higher in the attending group (99.9% vs 89.3%; P<0.001). The polyp detection rate was 40.8%, and no differences were observed between the studied groups. The residents had a higher rate of perforation in all exams (0.4% vs 0%; P=0.02). Postpolypectomy bleeding and 7-day readmission rates were the same (0.2%). All readmissions in 7 days occurred due to low digestive bleeding, and none required intervention. CONCLUSION: Quality indicators were met at a university outpatient endoscopy center; however, medical residents achieved lower rates of cecal intubation and higher rates of perforation than the attending physicians.

Ensino das habilidades básicas de colonoscopia: os padrões de qualidade e segurança podem ser atendidos em um centro universitário / Teaching basic colonoscopy skills: quality and safety standards can be fulfilled in an outpatient university center

ABSTRACT BACKGROUND: Recent studies have shown that endoscopy fellows can perform colonoscopy effectively and safely. However, little is known about the performance of surgical residents without prior knowledge of endoscopic techniques. OBJECTIVE: To assess whether quality indicators were met at an outpatient endoscopy center and whether surgical residents, without prior upper or lower endoscopy skills, could perform colonoscopy adequately. METHODS: A prospective non-randomized cohort study was undertaken. All exams were performed either by assistant physicians or by residents. Quality measures were compared between those groups. RESULTS: A total of 2720 colonoscopies were analyzed. In the resident group, we observed older patients (57.7±12.7 years vs 51.5±14.5 years, P<0.001), a higher prevalence of screening colonoscopies (52% vs 39.4%, P<0.001) and a higher prevalence of colorectal cancer (6.4% vs 1.8%, P<0.001). The cecal intubation rate was higher in the attending group (99.9% vs 89.3%; P<0.001). The polyp detection rate was 40.8%, and no differences were observed between the studied groups. The residents had a higher rate of perforation in all exams (0.4% vs 0%; P=0.02). Postpolypectomy bleeding and 7-day readmission rates were the same (0.2%). All readmissions in 7 days occurred due to low digestive bleeding, and none required intervention. CONCLUSION: Quality indicators were met at a university outpatient endoscopy center; however, medical residents achieved lower rates of cecal intubation and higher rates of perforation than the attending physicians.

RESUMO CONTEXTO: Estudos recentes mostraram que médicos em treinamento podem realizar a colonoscopia de maneira eficaz e segura. No entanto, pouco se sabe sobre a performance dos médicos residentes de cirurgia sem o conhecimento prévio das técnicas endoscópicas. OBJETIVO: Avaliar se os indicadores de qualidade foram atendidos em um centro de endoscopia ambulatorial e se os residentes de cirurgia, sem habilidades anteriores em endoscopia alta ou baixa, realizaram a colonoscopia de forma adequada. MÉTODOS: Foi realizado um estudo de coorte prospectivo não randomizado. Todos os exames foram realizados por médicos assistentes ou residentes. Os indicadores de qualidade foram comparados entre esses grupos. RESULTADOS: Um total de 2.720 colonoscopias foram analisadas. No grupo de médicos residentes, observamos pacientes mais velhos (57,7±12,7 anos vs 51,5±14,5 anos, P<0,001), maior prevalência de colonoscopias de rastreamento (52% vs 39,4%, P<0,001) e maior prevalência de câncer colorretal (6,4% vs 1,8%, P<0,001). A taxa de intubação cecal foi maior no grupo de médicos assistentes (99,9% vs 89,3%; P<0,001). A taxa de detecção de pólipos foi de 40,8% e não foram observadas diferenças entre os grupos estudados. Os médicos residentes tiveram maior índice de perfuração (0,4% vs 0%; P=0,02). O sangramento pós-polipectomia e as taxas de readmissão em 7 dias foram iguais (0,2%). Todas as readmissões em 7 dias ocorreram devido a hemorragia digestiva baixa e nenhuma intervenção foi necessária. CONCLUSÃO: Os indicadores de qualidade foram alcançados em um centro de endoscopia universitário; no entanto, os médicos residentes alcançaram taxas mais baixas de intubação cecal e taxas mais altas de perfuração do que os médicos assistentes.

A novel technique for superficial complicated stomas using the Dacron vascular prosthesis.

BACKGROUND AND PURPOSE: Despite the advances achieved in surgical techniques in recent years, an intestinal stoma is still needed in many patients undergoing colorectal surgery. However, the intestinal stoma may be associated with serious complications and the need for a second surgical procedure. In extreme cases, when it is not possible to access the abdominal cavity, the management of a complicated stoma is challenging. The purpose of this study was to describe the use of a Dacron vascular prosthesis (DVP) in patients with intestinal stoma complications. METHODS: In patients with a shallow, superficial stoma or mucocutaneous separation (MCS), we sutured the prosthesis in the intestinal loop (at the edge of an intestinal fistula) to create a device to direct the fecal content to the collection bag. RESULTS: We included 9 patients in this series (colorectal cancer, n = 5; Crohn's disease, n = 2; giant abdominal hernia and morbid obesity, n = 2). The results obtained were promising since they showed good evolution in patients with severe intestinal complications and an impossibility of surgical correction of the stoma. Five patients presented complete healing, and two patients presented partial healing. There were two deaths caused by sepsis, which were not related to the surgical procedure. With this technique, there was a reduction in the leakage of intestinal contents into the peritoneal cavity and an increase in the healing of the peristomal dermatitis in most of the patients. The DVP could possibly represent a surgical alternative in selected patients with complicated stomas when surgical correction may not be a suitable option. CONCLUSIONS: The authors recommend this technique for selected complex cases of stoma complications after unsuccessful attempts to adapt collecting equipment. The placement of the DVP allowed the peristomal skin to heal and improved the contamination of the peritoneal cavity.

Hyperbaric oxygen therapy decreases mortality due to Fournier's gangrene: a retrospective comparative study.

There is no consensus about the role of adjunctive hyperbaric oxygen therapy (HBOT) in the management of Fournier's gangrene. The aim of this study was to compare the evolution of patients with Fournier's gangrene treated with all classical measures with and without adjuvant HBOT. A retrospective comparative study regarding the evolution of patients treated for Fournier's gangrene was conducted in two periods. In period I, from 1990 to 2002, patients received standard treatments for Fournier's gangrene, which consisted of surgical debridement, antibiotic therapy and intensive care. In period II, from 2012 to 2019, adjunctive HBOT was added to the classical management strategy. All patients were assigned into four groups according to the anatomical severity classification and the area affected after the first debridement. This classification ensured that the groups could be comparable. The total number of patients in this study was 197, and these patients were divided into control group (118/59.9%) and HBOT group (79/40.1%). The mean age, comorbidities, and anatomical severity classification were similar between the two groups. In period I, 34 out of 118 (28.8%) patients died, while in the HBOT group, 3 out of 77 (3.7%) patients died (P < 0.001). The use of adjuvant HBOT in combination with classical treatment was associated with reduced mortality. This study was approved by the Institutional Review Board and the Ethics Committee of Ribeirão Preto Medical School, University of São Paulo, Brazil (No. 08/2018) on May 2, 2018.

COVID-19 quarantine measures are associated with negative social impacts and compromised follow-up care in patients with inflammatory bowel disease in Brazil.

BACKGROUND: COVID-19 has affected the entire world. We aimed to determine the impact of COVID-19 containment measures on the daily life and follow up of patients with inflammatory bowel disease (IBD). METHODS: During May 2020, we evaluated 179 (79.6%) patients with Crohn's disease (CD) and 46 (20.4%) with ulcerative colitis (UC) by telephone, using a structured questionnaire to gather information on social impact and IBD follow up. RESULTS: Some kind of social distancing measure was reported by 95.6% of our patients, self-quarantine (64.9%) being the most frequent. Depressive mood was the most prevalent social impact (80.2%), followed by anxiety/fear of death (58.2%), insomnia (51.4%), daily activity impairment (48%), sexual dysfunction (46.2%), and productivity impairment (44%). The results were similar when we compared patients with active disease to those in remission and patients with UC to those with CD. Analysis of IBD follow up showed that 83.1% of all patients missed an IBD medical appointment, 45.5% of the patients missed laboratory tests, 41.3% missed the national flu vaccination program, 31.3% missed any radiologic exam, 17.3% missed colonoscopy, and 16.9% failed to obtain biologic therapy prescriptions. Biologics were discontinued by 28.4% of the patients. UC patients had higher rates of missed vaccination than CD patients (56.5% vs. 37.4%, P=0.02) and more failures to obtain a biologic prescription (28.3% vs. 14.0%, P=0.02). CONCLUSIONS: Our study reveals alarming social impacts and declining follow-up care for IBD patients during the COVID-19 outbreak. These findings may have implications for disease control in the near future.