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Clinical features of symptomatic hypoglycemia observed after bariatric surgery.

Surgery for obesity and related diseases : official journal of the American Society for Bariatric Surgery(2018)

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Abstract
BACKGROUND:Literature directly looking at post-bariatric surgery hypoglycemia consists mostly of small case series. The rate, severity, and outcomes of treatment in a large bariatric population are less characterized. OBJECTIVE:To determine the rate of post-bariatric surgery hypoglycemia, its clinical features and management outcomes over a 13-year period at our institution. SETTING:An academic center in the United States. METHODS:Patients who underwent bariatric surgery at a single academic center between 2002 and 2015 and had a postdischarge glucose level of ≤70 mg/dL were studied. RESULTS:Of 6024 patients who underwent bariatric procedure, 118 patients (2.0%) had a postoperative glucose level ≤70 mg/dL. Eighty-three patients (1.4%) had symptomatic hypoglycemia. The known underlying causes of symptomatic hypoglycemia included postprandial hyperinsulinemic hypoglycemia (n = 32, 38%), infection (n = 8, 10%), diabetic medications (n = 8, 10%), and poor oral intake (n = 8, 10%). Overall, 9 patients required intervention for nutritional supplementation including enteral (n = 9) and intermittent parenteral (n = 2) nutrition. No patients required reversal of their bariatric surgeries or pancreatic resection for management of hypoglycemia. The majority of the symptomatic patients had resolution of their symptoms (n = 76, 92%). Thirty-two patients had postprandial hypoglycemia with a median onset of hypoglycemia after bariatric surgery of 790 days (interquartile range 388-1334). All 32 patients with postprandial hypoglycemia had dietary adjustment and 53% received pharmacotherapy, which resulted in complete resolution of hypoglycemia (n = 29, 91%) and resolution with minimal disability (n = 3, 9%). CONCLUSION:The rate of symptomatic hypoglycemia and postprandial hypoglycemia after bariatric surgery were 1.4% and .5%. The majority of patients were successfully managed with dietary counseling, nutritional intervention, and occasionally pharmacotherapy. No surgical reversal or pancreatic procedures were performed.
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