Intestinal obstruction following gastric bypass.

PURPOSE: To draw the attention of the medical community to a differential diagnosis of intestinal obstruction due to bezoar in the late postoperative period of gastric bypass that requires diagnosis and emergency management. METHODS: We report 8 cases of patients with intestinal obstruction due to bezoar in the late postoperative period of gastric bypass who required surgical intervention. CONCLUSION: Intestinal obstruction due to fruit pomace is a late complication that may require urgent surgical intervention and should be considered in the differential diagnosis.

Risk Factors for Explantation of Breast Implants: A Cross-Sectional Study.

BACKGROUND: Explantation of breast implant surgery (EBIS) is an emerging surgical field. Precise information about patients undergoing EBIS is important for preoperative planning of breast, augmentation, complications management, and to address any medicolegal issues. OBJECTIVES: The aim of this study was to further extend current knowledge of EBIS risk factors. METHODS: An analytic cross-sectional study was conducted involving patients who had previously undergone cosmetic breast augmentation and were seeking EBIS. RESULTS: The study recruited 138 patients. The average time from implant placement and decision to explantation was 59.1 months. On average, each 1-year increase in age resulted in a 4% increase in the relative risk (RR) of explantation (confidence interval (CI), 1.07-1.21). Patients who were obese or overweight present a 1.5 times higher risk of EBIS (CI 95%, 1.03-2.29). On average, this RR was 40% lower (CI 95%, 0.33-0.91) in patients who never smoked compared with those with a history of tobacco use. Women with mastalgia had a 72% higher RR for EBIS (CI 95%, 1.11-2.65). The RR of EBIS was 5.6 times higher (CI 95%, 2.42-11.47) in patients presenting major Shoenfeld's criteria for autoimmune/inflammatory syndrome induced by adjuvants (ASIA). The RR of EBIS was 4.3 times higher (CI 95%, 1.96-8.63) in patients presenting minor Shoenfeld's criteria for ASIA. CONCLUSIONS: EBIS poses a higher risk to patients who are overweight/obese, have a history of tobacco use, suffer from mastalgia, or present Shoenfeld's criteria for ASIA. It is important to assess properly these individuals before performing implant surgery for breast augmentation.

Vitamin B12 supplementation orally and intramuscularly in people with obesity undergoing gastric bypass.

PURPOSE: Although bariatric surgery can facilitate weight loss and improve many diseases, it impairs the absorption of many vitamins and micronutrients. Vitamin B12 is important for these patients and should be controlled and supplemented postoperatively. The aim of this paper is to compare serum vitamin B12 levels in two forms of supplementation (oral vs. intramuscular) for 6 months after gastric bypass. METHODS: In a prospective controlled cohort study, people with obesity patients undergoing gastric bypass received vitamin B12 supplementation either orally or intramuscularly. The patients were followed for 6 months, receiving serial doses of vitamin B12 and methylmalonic acid assessment at 6 months. RESULTS: A total of 53 patients were divided into two homogeneous groups: an oral group (n=24) and an intramuscular group (n=29). Serum vitamin B12 was measured preoperatively and postoperatively at 1, 2, 3, and 6 months. Serum methylmalonic acid was measured at 6 months. At each point, the serum vitamin B12 level remained within reference values in both groups, although it was higher in the oral group (p<0.001). Methylmalonic acid also remained within reference values in both groups, with no significant differences. CONCLUSION: Despite the anatomical and functional alterations that impair vitamin B12 absorption after gastric bypass, oral vitamin B12 supplementation was as effective as intramuscular in this population.