OBJECTIVE: To assess glucose homeostasis and weight loss in morbidly obese patients undergoing Silastic® ring sleeve gastrectomy. METHODS: This was a prospective clinical study. Thirty-three female patients with a mean body mass index (BMI) of 42.33 ± 1.50 kg/m² (range: 40-45 kg/m²), a mean age of 36.7 ± 9.4 years and a mean waist circumference of 118.7 ± 5.98 cm were included in this study. Type 2 diabetes mellitus was observed in 11 patients (33.3%), and glucose intolerance was observed in 4 patients (12.1%). Mean plasma fasting glucose levels were 109.77 ± 44.19 mg/dl (75-320) in the preoperative period. All Silastic® ring sleeve gastrectomy procedures were performed by the same surgical team using the same anesthetic technique. The patients were monitored for at least 12 months after surgery. RESULTS: The mean weight of the patients decreased from 107.69 ± 6.57 kg to 70.52 ± 9.36 kg (p < 0.001), the mean BMI decreased to 27.4 ± 2.42 kg/m² (p < 0.001), and the mean waist circumference decreased to 89.87 cm ± 6.66 (p < 0.001) in the postoperative period. Excess BMI loss was 86.5 ± 14.2%. Fasting glucose levels were reduced to 80.94 ± 6.3 mg/dl (p < 0.001). Remission of diabetes and glucose intolerance was observed in all patients. CONCLUSION: Silastic® ring sleeve gastrectomy was effective in promoting weight loss, waist circumference reduction and control of glucose homeostasis in morbidly obese patients.

OBJETIVOS: Avaliar o impacto da cirurgia bariátrica na síndrome metabólica (SM) e quais os critérios que mais contribuíram para sua remissão após cirurgia. A evolução da leucometria também foi analisada. MATERIAL E MÉTODO: 47 mulheres obesas com SM foram avaliadas. Todas as pacientes foram operadas pela técnica da gastroplastia vertical em Y-de-Roux, com colocação de anel de contenção na anastomose gastro-jejunal (Fobi-Capella). Pacientes foram avaliadas antes da cirurgia e no primeiro ano pós-operatório. RESULTADOS: A glicemia de jejum apresentou queda relevante nos 3 primeiros meses. Ao final de 12 meses, todas as 20 pacientes que tinham DM2 ou glicemia de jejum alterada apresentavam níveis glicêmicos e hemoglobina glicosilada normais. Nenhuma delas estava usando drogas anti-diabéticas. Valores de triglicerídeos reduziram 49,2%. O HDL-colesterol aumentou 27,2%. A redução da pressão arterial foi, em média, de 28,7 mmHg na sistólica e de 20,8 na diastólica. A contagem de leucócitos caiu de 7671/µL para 6156/µL. Glicemia de jejum, triglicerídeos, pressão diastólica e sistólica e HDL-colesterol foram as variáveis que mais contribuíram para a extinção da SM. No final do primeiro ano, essa extinção ocorreu em 80,9% das pacientes. DISCUSSÃO: Cirurgia bariátrica reduz a resistência à insulina e conseqüentemente os riscos cardiovasculares.

OBJECTIVES: To evaluate the impact of bariatric surgery on the metabolic syndrome (MS) and what are the criteria that contribute the most for its exclusion after surgery. The progress of leucometry was also analyzed. METHODS AND PROCEDURES: 47 obese women with MS were evaluated. All patients were operated with the Roux-en-Y vertical gastric bypass technique, with the insertion of a contention ring on the gastro-jejune anastomosis (Fobi-Capella). Patients were evaluated before and on the first year post-surgery. RESULTS: Fasting glucose presented a relevant decrease at 3 months after surgery. After 12 months, all 20 patients who had DM2 or altered fasting glucose presented normal levels of fasting glucose and glicated hemoglobin, and none of them was using any anti-diabetic drug. Triglycerides levels were reduced by 49.2%, whereas HDL-cholesterol increased by 27.2%. Systolic and diastolic blood pressures were reduced by an average of 28.7 and 20.8 mmHg, respectively. Leucocytes counting fell from 7671/µL to 6156/µL. Fasting glucose, triglycerides, DBP, SBP and HDL-cholesterol were the variables that contributed most for the reduction of MS. At the end of the first year, elimination of MS occurred in 80.9% of the patients. DISCUSSION: Bariatric surgery reduces resistance to insulin and consequently the cardiovascular risk factors.