FACTORS RELATED TO THE REDUCTION OF THE RISK OF COMPLICATIONS IN COLORECTAL SURGERY WITHIN PERIOPERATIVE CARE RECOMMENDED BY THE ACERTO PROTOCOL.

BACKGROUND: Perioperative care multimodal protocol significantly improve outcome in surgery. AIM: To investigate risk factors to various endpoints in patients submitted to elective colorectal operations under the ACERTO protocol. METHODS: Cohort study analyzing through a logistic regression model able to assess independent risk factors for morbidity and mortality, patients submitted to elective open colon and/or rectum resection and primary anastomosis who were either exposed or non-exposed to demographic, clinical, and ACERTO interventions. RESULTS: Two hundred thirty four patients were analyzed and submitted to 156 (66.7%) rectal and 78 (33.3%) colonic procedures. The length of hospital postoperative stay (LOS) ≥ 7 days was related to rectal surgery and high NNIS risk index; preoperative fasting ≤4 h (OR=0.250; CI95=0.114-0.551) and intravenous volume of crystalloid infused > 30ml/kg/day (OR=0.290; CI95=0.119-0.706). The risk of postoperative site infection (SSI) was approximately four times greater in malnourished; eight in rectal surgery and four in high NNIS index. The duration of preoperative fasting ≤4 h was a protective factor by reducing by 81.3% the risk of surgical site infection (SSI). An increased risk for anastomotic fistula was found in malnutrition, rectal surgery and high NNIS index. Conversely, preoperative fasting ≤4 h (OR=0.11; CI95=0.05-0.25; p<0.0001) decreased the risk of fistula. Factors associated with pneumonia-atelectasis were cancer and rectal surgery, while preoperative fasting ≤ 4 h (OR=0.10; CI95=0.04-0.24; p<0.0001) and intravenous crystalloid ≤ 30 ml/kg/day (OR=0.36; CI95=0.13-0.97, p=0.044) shown to decrease the risk. Mortality was lower with preoperative fasting ≤4 h and intravenous crystalloids infused ≤30 ml/kg/day. CONCLUSION: This study allows to conclude that rectal procedures, high NNIS index, preoperative fasting higher than 4 h and intravenous fluids greater than 30 ml/kg/day during the first 48 h after surgery are independent risk factors for: 1) prolonged LOS; 2) surgical site infection and anastomotic fistula associated with malnutrition; 3) postoperative pneumonia-atelectasis; and 4) postoperative mortality.

Study of the Annexin A1 and Its Associations with Carcinoembryonic Antigen and Mismatch Repair Proteins in Colorectal Cancer.

PURPOSE: Annexin-A1 (ANXA1) has been implicated in various tumor types, but few studies have investigated its involvement in colorectal cancer. The study aimed to analyze ANXA1 expression in the normal margin and colorectal tumor tissues of 104 patients who underwent surgery for colorectal cancer and to associate the ANXA1 expression with predictive clinicopathological variables. METHODS: Hematoxylin-eosin and immunohistochemical staining were used for the analysis. RESULTS: ANXA1 expression was higher in colorectal cancer than in normal margin tissue (p = 0.0001). However, no differences were observed when we analyzed the ANXA1 expression in colon and rectal tumors (p = 0.830). Also, this protein positivity was associated with increased carcinoembryonic antigen levels (p = 0.004). Our data in the DNA-mismatch repair proteins expression was in accordance to the literature. And their positivity was not associated with ANXA1 presence in colorectal cancer. CONCLUSION: The high incidence of ANXA1 positive expression in colorectal cancer and its association with carcinoembryonic antigen levels might indicate the importance of this protein in the colorectal cancer biology.

Factors related to the reduction of the risk of complications in colorectal surgery within perioperative care recommended by the acerto protocol / Fatores associados à redução do risco de complicações na cirurgia colorretal com cuidados peri-operatórios recomendados pelo projeto acerto

ABSTRACT Background: Perioperative care multimodal protocol significantly improve outcome in surgery. Aim: To investigate risk factors to various endpoints in patients submitted to elective colorectal operations under the ACERTO protocol. Methods: Cohort study analyzing through a logistic regression model able to assess independent risk factors for morbidity and mortality, patients submitted to elective open colon and/or rectum resection and primary anastomosis who were either exposed or non-exposed to demographic, clinical, and ACERTO interventions. Results: Two hundred thirty four patients were analyzed and submitted to 156 (66.7%) rectal and 78 (33.3%) colonic procedures. The length of hospital postoperative stay (LOS) ≥ 7 days was related to rectal surgery and high NNIS risk index; preoperative fasting ≤4 h (OR=0.250; CI95=0.114-0.551) and intravenous volume of crystalloid infused > 30ml/kg/day (OR=0.290; CI95=0.119-0.706). The risk of postoperative site infection (SSI) was approximately four times greater in malnourished; eight in rectal surgery and four in high NNIS index. The duration of preoperative fasting ≤4 h was a protective factor by reducing by 81.3% the risk of surgical site infection (SSI). An increased risk for anastomotic fistula was found in malnutrition, rectal surgery and high NNIS index. Conversely, preoperative fasting ≤4 h (OR=0.11; CI95=0.05-0.25; p<0.0001) decreased the risk of fistula. Factors associated with pneumonia-atelectasis were cancer and rectal surgery, while preoperative fasting ≤ 4 h (OR=0.10; CI95=0.04-0.24; p<0.0001) and intravenous crystalloid ≤ 30 ml/kg/day (OR=0.36; CI95=0.13-0.97, p=0.044) shown to decrease the risk. Mortality was lower with preoperative fasting ≤4 h and intravenous crystalloids infused ≤30 ml/kg/day. Conclusion: This study allows to conclude that rectal procedures, high NNIS index, preoperative fasting higher than 4 h and intravenous fluids greater than 30 ml/kg/day during the first 48 h after surgery are independent risk factors for: 1) prolonged LOS; 2) surgical site infection and anastomotic fistula associated with malnutrition; 3) postoperative pneumonia-atelectasis; and 4) postoperative mortality.

RESUMO Racional: Protocolos multimodais de cuidados perioperatórios melhoram significativamente resultados na cirurgia. Objetivo: Investigar fatores de risco para vários desfechos clínicos em pacientes submetidos às operações colorretais eletivas com o emprego do protocolo ACERTO. Métodos: Coorte analisando indivíduos expostos ou não expostos às variáveis de risco demográficas, clínicas e intervenções ACERTO, através de um modelo de regressão logística, determinando fatores independentes de risco para morbidade e mortalidade. Resultados: Duzentos e trinta e quatro pacientes foram submetidos a 156 (66,7%) operações retais e 78 (33,3%) colônicas. Mantiveram relação com tempo de internação ≥7 dias operação retal e escore NNIS alto; jejum pré-operatório > 4h e volume de cristalóides >30 ml/kg/dia. O risco de infecção de sítio cirúrgico foi aproximadamente quatro vezes maior em desnutridos; oito em operações retais; e quatro com NNIS alto. Tempo de jejum pré-operatório ≤4 h reduziu em 81,3% o risco de infecção de sitio cirúrgico. Risco aumentado para fístula ocorreu em desnutridos, operação retal e escore NNIS elevado. Tempo de jejum pré-operatório ≤4 h constituiu fator de proteção para ocorrência de fístulas. Os fatores associados à pneumonia/atelectasia foram câncer e operação retal, enquanto que tempo de jejum pré-operatório ≤4 h e volume de cristalóides intravenoso ≤30 ml/kg/dia foram fatores de proteção. Mortalidade foi menor com jejum ≤4 h e fluidos endovenosos ≤30 ml/kg/dia. Conclusão: Este estudo permite concluir que operações retais, presença de fator de risco NNIS, tempo de jejum pré-operatório superior a 4 h e fluidoterapia com cristaloides endovenosos superior a 30 ml/kg/dia nas primeiras 48 h de pós-operatório constituem-se em fatores de risco independentes e aplicáveis para: 1) tempo de internação pós-operatória prolongada; 2) para infecção do sítio cirúrgico e fístula anastomótica associadas à desnutrição; 3) para pneumonia/atelectasia no pós-operatório; e 4) para mortalidade pós-operatória.