Thyroid dysfunction in critically ill patients in a tertiary care hospital in Sikkim, India

M Suresh, Nitin K Srivastava, Amit Kumar Jain, Parvati Nandy

Thyroid Research and Practice 2017 14(2):58-62

Background: During critical illness, patients with no history of thyroid disorders may experience multiple changes in their thyroid hormone levels. Such changes are termed as euthyroid sick syndrome. The extent of change correlates with the severity of the illness and its outcomes in critically ill patients. Objectives: The aim of this study was to identify critically ill patients and grade them clinically according to the Acute Physiology and Chronic Health Evaluation II (APACHE II) severity scale and evaluate the thyroid function tests (TFTs) and to document the outcome and relate the APACHE II severity scale with TFTs. Methods: A descriptive, observational hospital-based study was conducted on critically ill patients admitted to the Intensive Care Unit who fulfilled the inclusion criteria. All data were entered into Microsoft Excel sheet and were analyzed using GraphPad InStat software. Results: The majority of the patients belonged to geriatric age group (49%) and were male (55%). Cardiovascular diseases (43%) constituted the major morbidity. The majority had APACHE II score ≥20 (71%) and succumbed (45%) to their illness within 10 days. The majority of them had a low total triiodothyronine (T3) (49%), and there was a significant inverse correlation (P = 0.0235) between severity of illness and low serum total T3 levels whereas there was no relationship between total thyroxine or thyroid-stimulating hormone levels and severity of illness. Conclusions: Serum T3 has a significant inverse relationship to the severity of critically ill patients.

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