Anesthesia for morbidly obese patients.

Bariatric surgery is the most effective method for treating patients with morbid obesity, and participation of the anesthesiologist in the treatment of these patients is more and more frequent. Therefore it is important for anesthesiologists to be familiar with anatomic and physiologic implications and the pharmacologic changes associated with obesity, so they can offer optimal perioperative treatment. The present study describes a series of 37 patients with an average body mass index of 50.3 kg/m2 who underwent bariatric surgery in a third-level teaching hospital in Mexico City. Preoperative assessment, airway management, perioperative treatment, and the incidence of complications are analyzed. We found a high frequency of associated diseases, among which diabetes mellitus and systemic arterial hypertension were the most prominent. Cardiorespiratory complications such as obstructive sleep apnea syndrome and obesity-hypoventilation syndrome were particularly frequent (16.2% and 22.0%, respectively). Both general anesthesia and mixed anesthesia (peridural block plus light general anesthesia) were employed. The incidence of complications related to perioperative and anesthetic management was low. We discuss and propose protocols for the evaluation and management of airway and associated cardiorespiratory complications.

Risk factors for operative morbidity in patients with systemic lupus erythematosus: an analysis of 63 surgical procedures.

The surgical morbidity rate of patients with Systemic Lupus Erythematosus is considered very high; however, the experience in the literature is small. This study will determine the rate of surgical morbidity and the existence of predictive factors in patients with such a disease. The medical records of 53 patients with Systemic Lupus Erythematosus who underwent 63 major operations were analyzed retrospectively. The rate and causes of operative morbidity were registered. Univariate and multivariate statistical analysis was performed to ascertain the existence of predictive factors for morbidity. The overall morbidity and mortality were 16% and 6% respectively. Lymphopenia, hypoalbuminemia, increased SGOT and SGPT, urgent indication of operation, the physical status of the American Society of Anesthesiology, as well as a shorter duration of Systemic Lupus Erythematosus showed a significant correlation with operative morbidity in the univariate analysis; high blood urea nitrogen showed marginal significance. Physical status, urgent indication, and blood urea nitrogen remained as significant variables with the multivariate logistic regression analysis. The surgical morbidity rate of these patients may be lower than previously estimated. The physical status, urgency of operation, and level of blood urea nitrogen seemed to be the most useful independent predictors for surgical morbidity risk in patients with Systemic Lupus Erythematosus.

Long-term evolution of asymptomatic cholelithiasis diagnosed during abdominal operations for variceal bleeding in patients with cirrhosis.

To define the risk of complications in cirrhotic patients with asymptomatic cholelithiasis and the possible benefit of incidental cholecystectomy during abdominal operations in these patients, a retrospective cohort of cirrhotic patients who had asymptomatic cholelithiasis and underwent abdominal operations for portal hypertension was analyzed. Of 338 patients operated on during the last 15 years, 34 patients were found with asymptomatic cholelithiasis, all of whom had long-term follow-up. At a mean follow-up of 70.5 +/- 8.6 months (SEM), 28 patients remained asymptomatic (82%), 6 patients have developed symptoms (18%), (4 patients had acute cholecystitis and 2 chronic cholecystitis), and 3 of these patients (8.8%) died due to complications of acute cholecystitis. The results suggest that the risk for the development of complications is low but that the mortality associated with acute episodes of cholecystitis is high. Incidental cholecystectomy is not justified in cirrhotic patients with asymptomatic cholelithiasis, but close follow-up with early elective operation when symptoms supervene should be recommended.