Temperature Dysregulation in Elderly Patients

Life-Threatening Conditions Requiring Immediate Evaluation

Elderly patients may present with atypical fever patterns or hypothermia during serious infections, making temperature dysregulation a red flag for sepsis, according to the Centers for Disease Control and Prevention (CDC) 1, 2
The CDC recommends looking specifically for altered mental status, leukopenia, thrombocytopenia, and elevated liver enzymes in elderly patients with suspected sepsis 1, 2
Blood cultures, urinalysis, and complete blood count must be obtained immediately before initiating empiric antibiotics, as recommended by the CDC 1, 2
The American Heart Association suggests that heat exhaustion or early heat stroke can present with nausea, temperature dysregulation, and altered mental status, with critical distinguishing features including recent heat exposure and inability to cool down 3, 4

Cyclic Vomiting Syndrome (CVS) can present with prodromal symptoms including feeling hot or cold, nausea, mental fog, anxiety, and diaphoresis, according to the American Gastroenterological Association 5, 6
The CDC recommends that viral gastroenteritis can cause nausea with subjective temperature dysregulation, and critical distinction should be made if symptoms persist beyond 24-48 hours or worsen, escalating evaluation for serious infection 1, 2

The Society of Critical Care Medicine recommends obtaining core temperature measurement, complete blood count with differential, comprehensive metabolic panel, blood cultures, and urinalysis urgently 1, 2, 7

The Society of Critical Care Medicine suggests that if infection is suspected with high probability, antibiotics should not be delayed waiting for procalcitonin results, and broad-spectrum coverage should be initiated immediately after cultures are obtained 7
The American Heart Association recommends that if hyperthermia with altered mental status is present, emergency response should be activated, and immediate cooling should be initiated, targeting a core temperature <39°C 4