Camille Bonis1, Françoise Lorenzini1,2, Monelle Bertrand3, Olivier Parant2, Pierre Gourdy1, Charlotte Vaurs1, Laurent Cazals1, Patrick Ritz3, Hélène Hanaire4,5. 1. Department of Diabetology, Metabolic Diseases, and Nutrition, CHU Toulouse, Toulouse, France. 2. Department of Obstetrics and Gynecology, Paule de Viguier Hospital, CHU of Toulouse, Toulouse, France. 3. Nutrition Unit, Cardiovascular and Metabolism Division, Larrey Hospital, CHU of Toulouse, Toulouse, France. 4. Department of Diabetology, Metabolic Diseases, and Nutrition, CHU Toulouse, Toulouse, France. hanaire.h@chu-toulouse.fr. 5. University of Toulouse 3, Toulouse, France. hanaire.h@chu-toulouse.fr.
Abstract
BACKGROUND: The diagnosis of gestational diabetes mellitus (GDM) usually requires an oral glucose tolerance test, but this procedure seems inappropriate after gastric bypass surgery (Roux-en-Y gastric bypass (RYGB)) due to specific altered glycemic responses. We aimed here at describing continuous glucose monitoring (CGM) profile of pregnant women after RYGB. METHODS: CGM was performed in 35 consecutive pregnant women after RYGB at 26.2 ± 5 weeks of gestation. RESULTS: After RYGB, pregnant women display high postprandial interstitial glucose (IG) peaks and low IG before and 2 h after meals. The postprandial IG peak is reached early, within 54 ± 9 min. The maximum IG values reach 205 mg/dl, and the percentage of time above 140 mg/dl (6.6 ± 7 %) is similar to what is described in GDM women. CONCLUSIONS: This study is the first to describe CGM profile in pregnant women after RYGB. CGM features are similar to those of non-pregnant post-RYGB patients, characterized by wide and rapid changes in postprandial IG, and high exposure to hyperglycemia. The exposure to hyperglycemia is similar to what is reported in GDM although the time to postprandial peak is shorter. CGM could be an additional useful approach to screen for glucose intolerance during pregnancy after RYGB.
BACKGROUND: The diagnosis of gestational diabetes mellitus (GDM) usually requires an oral glucose tolerance test, but this procedure seems inappropriate after gastric bypass surgery (Roux-en-Y gastric bypass (RYGB)) due to specific altered glycemic responses. We aimed here at describing continuous glucose monitoring (CGM) profile of pregnant women after RYGB. METHODS: CGM was performed in 35 consecutive pregnant women after RYGB at 26.2 ± 5 weeks of gestation. RESULTS: After RYGB, pregnant women display high postprandial interstitial glucose (IG) peaks and low IG before and 2 h after meals. The postprandial IG peak is reached early, within 54 ± 9 min. The maximum IG values reach 205 mg/dl, and the percentage of time above 140 mg/dl (6.6 ± 7 %) is similar to what is described in GDM women. CONCLUSIONS: This study is the first to describe CGM profile in pregnant women after RYGB. CGM features are similar to those of non-pregnant post-RYGB patients, characterized by wide and rapid changes in postprandial IG, and high exposure to hyperglycemia. The exposure to hyperglycemia is similar to what is reported in GDM although the time to postprandial peak is shorter. CGM could be an additional useful approach to screen for glucose intolerance during pregnancy after RYGB.
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