Impact of perioperative hypoglycaemia in subjects with diabetes undergoing colorectal surgery.

INTRODUCTION: This study explores the association between perioperative hypoglycaemia and surgical outcomes in subjects with diabetes, undergoing colorectal surgery.

METHODS: A retrospective review of 149 subjects with Type 2 Diabetes Mellitus (DM) who underwent colorectal surgery between 2010 and 2015 was performed. Perioperative glucose levels, glycated haemoglobin (HbA1c) measurements within 3 months of surgery and surgical complications based on Clavien-Dindo classification were analysed.

RESULTS: The mean age was 67 years (67 ± 11.2). Perioperative hypoglycaemia was found in 7.4% of subjects. The mean HbA1c of subjects with Clavien 2 and above surgical complications were higher than patients with Clavien 1 or no complications, Hba1c 7.6% (7.6 ± 2.5%) and 7.0% (7.0 ± 1.1%, p = 0.008), respectively. Similar findings in subjects with Clavien 3 and above complications, HbA1c of 8.2% (8.2 ± 3.9%) as compared to those with Clavien 2 and below complications, 7.2% (7.2 ± 1.5%, p = 0.001). Adjusted multivariate analysis showed that hypoglycaemia was significantly associated with Clavien 2 and above surgical complications, OR of 19.0 (CI 2.23-162, p = 0.007). Preoperative hypoglycaemia was associated with Clavien 2 and above surgical complications, OR 10.7 (CI 1.22-94.1, p = 0.032). Suboptimal glycaemic control (Hba1c >8.0%) was significantly associated with Clavien 2 and above complications, OR 2.48 (CI 1.04-5.91, p = 0.04), but not with Clavien 3 and above complications, OR 1.50 (CI 0.450-4.98, p = 0.511).

CONCLUSION: Perioperative hypoglycaemia is associated with adverse surgical outcomes in diabetic patients undergoing colorectal surgery. Prevention of hypoglycaemia may improve surgical outcomes. HbA1c is an independent predictor for adverse surgical outcomes.