Differential Diagnosis for Generalized Weakness and Hypothermia

Primary Diagnostic Categories

• The American College of Critical Care recommends evaluating adrenal insufficiency with cortisol levels in all hypothermic patients 1

Initial Diagnostic Approach

• Measure core body temperature using esophageal, bladder, or rectal thermometry, as peripheral measurements are unreliable in hypothermia 1, 2
• Document temperature every 5-15 minutes depending on severity (every 5 minutes for moderate-severe hypothermia, every 15 minutes for mild cases) 1
• Obtain cortisol levels as recommended by Critical Care guidelines to evaluate for adrenal insufficiency 1

Critical Physical Examination Findings

• Evaluate cardiovascular status: bradycardia is expected in hypothermia, but arrhythmias indicate severe disease 1, 3

Common Pitfalls and Caveats

• Hypothermia is frequently overlooked during initial resuscitation, with one major trauma center documenting temperature in only 38% of trauma admissions 4
• Emphasis should be on prevention of further heat loss while the diagnostic workup proceeds, as it becomes increasingly difficult to rewarm patients once significant heat is lost 2
• Severe hypothermia can cause cardiac irritability, but this should not delay necessary diagnostic interventions including vascular access 3