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Published on: June 11, 2012
Strict glycemic targets need not be so strict: a more permissive glycemic range for critically ill children
Kalia Patricia Ulate1, Germano Correia Lima Falcao, Mark Richard Bielefeld
1Department of Pediatrics, Driscoll Children's Hospital, Corpus Christi, TX 78411, USA.
Insights
Postoperative hyperglycemia in children undergoing congenital heart defect surgery is linked to higher mortality. A more permissive blood glucose target reduces hypoglycemia without increasing death rates.
Area of Science:
- Pediatric critical care medicine
- Cardiovascular surgery
- Endocrinology
Background:
- Hyperglycemia is a common complication in critically ill pediatric patients, particularly after congenital heart defect surgery.
- The optimal glycemic target in this population remains debated, with concerns about hypoglycemia versus hyperglycemia-related morbidity and mortality.
Purpose of the Study:
- To investigate the association between postoperative glycemic control and outcomes in pediatric patients undergoing congenital heart defect surgery.
- To determine if a more permissive glycemic target reduces hypoglycemia incidence without increasing mortality.
Main Methods:
- Retrospective analysis of 177 pediatric patients undergoing 211 surgical procedures for congenital heart defects.
- Patients were stratified into glycemic groups: euglycemia, mild, moderate, and severe hyperglycemia.
- Outcomes were compared between glycemic groups and a permissive target group (90-140 mg/dL).
Main Results:
- Nonsurvivors exhibited higher peak glucose levels and a longer duration of hyperglycemia in the first 5 postoperative days.
- Moderate and severe hyperglycemia groups had significantly higher mortality rates compared to euglycemia and permissive target groups.
- The permissive target group showed a significantly lower incidence of hypoglycemia than the euglycemia group.
Conclusions:
- Postoperative hyperglycemia is a significant risk factor for increased morbidity and mortality in pediatric patients after congenital heart defect surgery.
- Implementing a more permissive glycemic target (90-140 mg/dL) is associated with reduced hypoglycemia without adversely affecting mortality rates.
Objective:
The goal was to determine whether a more permissive glycemic target would be associated with a decreased incidence of hypoglycemia but not increased mortality rates in critically ill pediatric patients.
Methods:
This retrospective study evaluated clinical and laboratory data for 177 patients who underwent 211 consecutive surgical procedures for repair or palliation of congenital heart defects at Driscoll Children's Hospital. To establish the relationship between postoperative glycemia and subsequent morbidity and mortality rates, patients were stratified into 4 groups according to their median glucose levels, that is, euglycemia (60-125 mg/dL, 3.3-6.9 mmol/L), mild hyperglycemia (126-139 mg/dL, 6.9-7.7 mmol/L), moderate hyperglycemia (140-179 mg/dL, 7.7-9.9 mmol/L), or severe hyperglycemia (>or=180 mg/dL, >or=9.9 mmol/L). Postoperative outcomes for those groups also were compared with outcomes for a more permissive glycemic target group (90-140 mg/dL, 5-7.7 mmol/L).
Results:
The peak and mean blood glucose measurements and duration of hyperglycemia were not different for survivors and nonsurvivors in the first 24 hours after surgery. Nonsurvivors had higher peak glucose levels (389.3 +/- 162 mg/dL vs 274.4 +/- 106.3 mg/dL, 21.4 +/- 8.9 mmol/L vs 15.1 +/- 5.9 mmol/L) and longer duration of hyperglycemia (3.06 +/- 1.67 days vs 2.11 +/- 0.92 days) during the first 5 postoperative days, compared with survivors. Mortality rates were significantly higher for the moderate (38.8%) and severe (58.3%) hyperglycemia groups, compared with the euglycemia (6.02%) and permissive target (4.69%) groups. The incidence of hypoglycemia was significantly higher in the euglycemia group (31.8%), compared with the permissive target group (17.18%).
Conclusions:
Postoperative hyperglycemia is associated with increased morbidity and mortality rates in children after surgical repair of congenital heart defects. A more permissive glycemic target is associated with a lower incidence of hypoglycemia but not increased mortality rates in these patients.
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