Clinical Practice and Care Management of the Acutely Ill Adult-Gerontology Population
What the exam tests
The clinical domain asks you to build a differential from a focused history and exam, manage the unstable adult, and anticipate complications across the aging trajectory. Master these clusters: oxygen delivery and hemodynamics (cardiac output = heart rate × stroke volume; preload, afterload, contractility; MAP ≈ (SBP + 2·DBP)/3), sepsis recognition and bundle timing, acute coronary syndrome, heart failure profiles (wet/dry, warm/cold) and diuretic strategy, hypoxemic versus hypercapnic respiratory failure and lung-protective ventilation, acute kidney injury (prerenal, intrinsic, postrenal; urine output criteria; nephrotoxin avoidance), glycemic control, delirium, falls, pressure injury, nutrition, and care transitions.
Geriatric physiology carries heavy weighting. Decreased glomerular filtration, reduced hepatic first-pass metabolism, blunted baroreflex, impaired thirst, and attenuated fever responses change both drug handling and symptom presentation. Polypharmacy, anticholinergic burden, Beers Criteria drugs, renal dosing, and deprescribing are frequent targets.
Traps
- Assuming that the absence of fever rules out infection in an older adult.
- Confusing delirium with dementia; delirium is acute, fluctuating, and marked by inattention.
- Treating a number rather than a person, such as tight glycemic targets in limited life expectancy.
- Trusting a 'normal' creatinine that masks reduced GFR in low-muscle-mass elders.
Rule of thumb
Acute mental status change in an older adult is delirium until proven otherwise. Hunt the trigger: drugs, electrolytes and dehydration, infection, retention, ischemia, restraints and immobility, unfamiliar environment, metabolic derangement, and sensory deficits.
Worked example
An 84-year-old with two days of confusion, no fever, WBC 11.2, and creatinine 1.1 (baseline 0.8). Assume delirium. Obtain urinalysis and culture, ECG and troponin, review the medication list for anticholinergics and sedatives, and assess for urinary retention and constipation. Treat the cause; avoid reflexively ordering a sedative.