Research

Hormonal

Roux-en-Y gastric bypass (RYGB) surgery increases glycemic variability and time in hypoglycemic ranges in both diabetic and non-diabetic patients within six months post-operation, with non-diabetic patients showing a significant decrease in time in range due to increased hypoglycemia.

If you undergo Roux-en-Y gastric bypass, expect your blood sugar to fluctuate more, including episodes of low blood sugar (hypoglycemia), even if you did not have diabetes before. This happens because the surgery speeds up how food enters your intestine. Use a continuous glucose monitor to track these changes, as standard HbA1c tests might miss these dangerous lows.

ModerateSupportsMEDIUM confidence
The CGM identified an increase in time below range in both groups undergoing RYGB after six months when compared to the preoperative period... In this same group [without T2DM], there was a significant decrease in TIR due to the increase in time in hypoglycemia. Such findings suggest a higher GV in patients with T2DM undergoing RYGB and even in patients without a diagnosis of T2DM before surgery.
Raquel do Amaral Prado Quevedo · 2024

Why this rating

Small sample size (14 operated patients + 7 controls) and short follow-up (6 months), though using continuous glucose monitoring.

Source

Avaliação da variabilidade glicêmica em pacientes submetidos à derivação gástrica em Y de Roux com ou sem diabete melito tipo 2

Raquel do Amaral Prado Quevedo · 2024

DOI 10.11606/d.5.2024.tde-02072024-161545

cohort · n=21
Read the paper
DOI resolved against Crossref · corpus check 2026-06-10

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