ICU · Resuscitation
Acute severe community-acquired pneumonia: special populations — elderly
Also known as CAP in the elderly · Pneumonia in older ICU patients · Atypical presentation of pneumonia in elderly · Geriatric ICU
CAP in the elderly (over 65 years) presents differently and has worse outcomes than in younger adults. Reported symptom prevalence falls with age even after adjustment for comorbidity and severity: fever may be absent, and confusion or altered mental status may be the ONLY presenting symptom, with falls, functional decline, anorexia, and incontinence dominating the picture. Mortality rises steeply with age, driven by reduced physiological reserve, comorbidities, immunosenescence, malnutrition, polypharmacy, and aspiration risk (swallowing impairment). Management: lower threshold for hospital and ICU care, antibiotics within one hour in sepsis, swallow assessment before oral intake, comprehensive geriatric assessment, delirium prevention, early mobilisation, and vaccination (pneumococcal PCV20 or PCV15 plus PPSV23, annual high-dose influenza, RSV) before or at discharge.
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Red flags
- Elderly patient with new confusion, falls, or functional decline = consider pneumonia (may not have fever or cough)
- Elderly CAP patients are often AFEBRILE — absence of fever does NOT exclude infection (reported symptom prevalence falls with age)
- Aspiration risk high in elderly: assess swallow (SLT) before oral intake
- Polypharmacy: review ALL medications — drug interactions, nephrotoxicity, deliriogenic drugs
Meet the patient
An 82-year-old woman with dementia and an old stroke is brought from her nursing home after being found on the floor. She cannot give a history; her temperature is 36.1, she is breathing 28 times a minute, her saturation is 88 percent, and she is more confused than her usual self. Her family say she has been off her food and less mobile for two days, and the chest film shows a right lower-lobe consolidation.[1]
This is the textbook geriatric presentation — the fever and the cough never arrived, and the fall and the confusion did. Hold her story and the four elderly-specific traps line up at once: atypical presentation, the age built into every score, the silent aspiration, and the goals-of-care conversation that should not wait for a crisis.[4]
References17ShowHide
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