Rationale-Adrenal insufficiency is a clinical condition associated with fluid-and catecholamine-resistant hypotension.Objectives-The objectives of this study were to determine the prevalence of adrenal insufficiency, risk factors and potential mechanisms for its development, and its association with clinically important outcomes in critically ill children.Correspondence and requests for reprints should be addressed to Kusum Menon, M.Sc., Pediatric Intensive Care Unit, Children's Hospital of Eastern Ontario, 401 Smyth Road, Ottawa, ON, K1S 3H2 Canada. menon@cheo.on.ca. * Canadian Critical Care Trials AIP Study Group: Institutions, site investigators, research coordinators, and research assistants (numbers of enrolled patients are shown in parentheses): British Columbia Children's and Women's Hospital, Vancouver, BC, Canada
Conflict of Interest Statement:None of the authors has a financial relationship with a commercial entity that has an interest in the subject of this manuscript.The CIHR and CHEORI had no role in the design and conduct of the study, in the collection, analysis and interpretation of the data, or in the preparation of the manuscript. Assistance in the design of the study was provided by the Canadian Critical Care Trials Group. This article has an online supplement, which is accessible from this issue's
CIHR Author Manuscript
CIHR Author Manuscript
CIHR Author ManuscriptMethods-A prospective, cohort study was conducted from 2005 to 2008 in seven tertiary-care, pediatric intensive care units in Canada on patients up to 17 years of age with existing vascular access. Adrenocorticotropic hormone stimulation tests (1 μg) were performed and adrenocorticotropic hormone levels measured in all participants.
Measurements and MainResults-A total of 381 patients had adrenal testing on admission. The prevalence of adrenal insufficiency was 30.2% (95% confidence interval, 25.9-35.1). Patients with adrenal insufficiency had higher baseline cortisol levels (28.6 μg/dl vs. 16.7 μg/dl, P < 0.001) and were significantly older (11.5 yr vs. 2.3 yr, P < 0.001) than those without adrenal insufficiency. Adrenal insufficiency was associated with an increased need for catecholamines (P <0.001) and more fluid boluses (P = 0.026). The sensitivity and specificity of the low-dose adrenocorticotropic hormone stimulation test were 100% and 84%, respectively.Conclusions-Adrenal insufficiency occurs in many disease conditions in critically ill children and is associated with an increased use of catecholamines and fluid boluses. It is likely multifactorial in etiology and is associated with high baseline cortisol levels. Further research is necessary to determine which of these critically ill children are truly cortisol deficient before any treatment recommendations can be made.
Keywords adrenal gland; adrenal function; adrenocorticotropic hormoneAdrenal insufficiency is a clinical condition associated with hypotension that can be resistant to fluid and catecholamine therapy and, if untreated, can result in increased morta...