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Correlation between hyperglycemia and mortality in a medical and surgical intensive care unit
V Gabbanelli1, S Pantanetti, A Donati
1Department of Medical and Surgical Emergencies, Polytechnic University of Marche, Ancona, Italy. Vincenzo_Gabbanelli@tin.it
Insights
Strict blood glucose control in intensive care units (ICUs) is crucial. Maintaining blood glucose levels below 141.7 mg/dL significantly reduces mortality risk in ICU patients.
Area of Science:
- Critical Care Medicine
- Endocrinology
- Clinical Research
Background:
- Hyperglycemia is common in intensive care unit (ICU) patients.
- The association between hyperglycemia and patient outcomes requires further investigation.
Purpose of the Study:
- To determine the correlation between hyperglycemia and mortality in medical and surgical ICU patients.
- To assess if hyperglycemia worsens patient outcomes based on ICU admission reasons.
Main Methods:
- Retrospective clinical study involving 412 adult ICU patients.
- Blood glucose levels measured at admission and daily; intensive insulin therapy initiated for levels >180 mg/dL.
Main Results:
- A mean blood glucose level of 141.7 mg/dL was identified as a threshold for mortality risk.
- Patients with mean glucose >141.7 mg/dL had a 26.62% mortality rate versus 13.55% with strict control (P=0.0017).
Conclusions:
- Strict blood glucose control is essential in medical and surgical ICUs.
- Intensive insulin therapy is vital for normalizing blood glucose levels and improving patient outcomes.
Aim:
The aim of this study was to assess the correlation between hyperglycemia and mortality in a group of patients admitted to a medical and surgical ICU and to evaluate if the association between hyperglycemia and reason of ICU admission significantly worsens patients' outcomes.
Methods:
A retrospective clinical study was conducted in the ICU of a University Hospital. Four-hundred and twelve adult patients admitted to our ICU were enrolled. The blood glucose level was measured at the time of admission and daily at 2-4 h intervals. When the glucose level exceeded 180 mg/dL, an insulin bolus or a continuous infusion were performed to maintain the glucose level at or below 180-200 mg/dL.
Results:
Analysing the mean blood glucose levels of patients with the receiver operating characteristic (ROC) curve, it resulted that the blood glucose level of 141.7 mg/dL had higher sensitivity (76%) and specificity (56.5%) to discriminate the probability of death. In other words, in patients in whom the mean blood glucose levels were greater than 141.7 mg/dL, the probability of death was higher (26.62%) than in the group of patients in whom a strict blood glucose control was maintained (13.55%) (P = 0.0017).
Conclusions:
A strict blood glucose control seems to be crucial, even in a medical and surgical ICU. The need for intensive insulin therapy, even by means of continuous infusion of insulin, to obtain the normalization of blood glucose levels, appears essential.
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