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"PURPOSE: The aim of this study was to determine the risk factors for anastomotic leakage after laparoscopic rectal surgery.METHODS: We conducted a prospective trial involving 395 patients with stage 0/I rectal carcinoma who underwent laparoscopic low anterior resection using a double stapling technique. Data concerning variables related to patient background, tumors and surgical factors were evaluated. The outcomes with respect to anastomotic leakage were recorded, and univariate and multivariate analyses were performed to identify relevant risk factors.RESULTS: The overall anastomotic leakage rate was 8.4%. A univariate analysis showed male gender (P = 0.006) and preoperative blood sugar level (P = 0.0034) to be significantly associated with anastomotic leakage. The variables of gender, preoperative blood sugar level, American Society of Anesthesiologists (ASA) classification (P = 0.15), transanal decompression tube (P = 0.06) and number of stapler cartridges used for rectal transection (P = 0.18) were selected for the multivariate analysis because of their P values being <0.2. The multivariate analysis identified male gender (odds ratio 4.12, P = 0.006) and the absence of a transanal decompression tube (odds ratio 3.11, P = 0.0484) as independent risk factors predicting anastomotic leakage.CONCLUSIONS: Male gender and the absence of a transanal decompression tube appeared to be independent risk factors for anastomotic leakage. Insertion of a transanal decompression tube may help prevent anastomotic leakage after low anterior resection, particularly in male patients."

"ABSTRACTPurpose: Postoperative pneumonia affects the length of stay and mortality after surgery in elderly patients with colorectal cancer (CRC). We aimed to determine the risk factors of postoperative pneumonia in elderly patients with CRC, and to evaluate the impact of laparoscopic surgery on elderly patients with CRC.Methods: We retrospectively investigated 1473 patients ≥ 80 years of age who underwent surgery for stage 0-III CRC between 2003 and 2007. Using a multivariate analysis, we determined the risk factors for pneumonia occurrence from each baseline characteristic.Results: Among all included patients, 26 (1.8%) experienced postoperative pneumonia, and restrictive respiratory impairment, obstructive respiratory impairment, history of cerebrovascular events, and open surgery were determined as risk factors (odds ratio [95% confidence interval], 2.78 [1.22-6.20], 2.71 [1.22-6.30], 3.60 [1.37-8.55], and 3.57 [1.22-15.2], respectively). Furthermore, postoperative pneumonia was more frequently accompanied by increasing cumulative numbers of these risk factors (area under the receiver operating characteristic curve = 0.763).Conclusions: Laparoscopic surgery may be safely performed in elderly CRC patients, even those with respiratory impairment and a history of cerebrovascular events."