Delirium versus 'Terminal Restlessness' in a Man Wanting to Go Home
Mrs. K is 84 with advanced COPD (FEV1 0.6 L, on 2 L home oxygen) and a new diagnosis of likely lung cancer (no tissue diagnosis; she declined bronchoscopy). She is admitted with worsening breathlessness. Over 24 hours she becomes agitated, pulling at her oxygen tubing, calling for her deceased husband, and is oriented only to person. She is tachypneic at 28, SpO2 90% on 4 L, has coarse crackles at both bases, and her medications include prednisone 20 mg daily, furosemide 40 mg daily, and morphine 2.5 mg subcutaneously every 4 hours as needed (she has had 4 doses in 24 hours). The family wants her 'comfortable' and asks if she can go home to die. Staff describe her as 'terminal.'
1. What is your differential for her agitation, and what bedside workup is justified given her goals?
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Delirium is the leading diagnosis, but the cause must be sought because many causes are reversible and she has expressed a preference (through family) for comfort that could include being more lucid.
Differential:
- Hypoxia/hypercapnia from COPD exacerbation or malignant pleural effusion or airway obstruction.
- Opioid or benzodiazepine accumulation (she is elderly, low body weight, possible renal/hepatic impairment).
- Infection (pneumonia, urinary tract infection).
- Metabolic: hypercalcemia, hyponatremia, hyperglycemia, uremia.
- Medication effects: corticosteroids (steroid psychosis), anticholinergics, recent sedatives.
- Urinary retention or fecal impaction.
- Intracranial event or brain metastases.
- Alcohol or benzodiazepine withdrawal if relevant history.
Justified workup given comfort-focused goals: focused history and medication review, bladder scan, abdominal exam, capillary glucose, pulse oximetry and if tolerated a blood gas or venous CO2, basic electrolytes, calcium, creatinine, complete blood count, and urinalysis. Chest imaging only if it would change management. Avoid invasive tests that would not alter comfort-directed care.
2. She is agitated and breathless. How do you manage symptoms while preserving the possibility of discharge home?
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Treat the underlying contributors and the symptoms together.
- Optimize breathlessness: controlled oxygen to target saturation (88-92% in COPD), consider bronchodilators, and if effusion is suspected and drainage would relieve breathlessness, consider a therapeutic thoracentesis (palliative intent).
- Opioids are first-line for refractory breathlessness; use low-dose opioids titrated to effect, watching for accumulation. Avoid escalating sedatives as a first response to agitation until delirium is addressed.
- For hyperactive delirium, use the lowest effective dose of an antipsychotic (e.g., haloperidol) for short-term symptom control, recognizing it treats symptoms not the cause; avoid in Parkinsonism or Lewy body disease. Benzodiazepines are generally avoided in delirium except in withdrawal or where antipsychotics are contraindicated.
- Non-pharmacologic: reorientation, familiar faces, glasses and hearing aids, daylight, minimize nighttime interruptions, involve family.
- Reassess frequently; document target symptoms and responses.
Discharge home: feasible if agitation and breathlessness are controlled, a care plan with anticipatory medications is in place, and the family has support. A short admission to stabilize, then a planned discharge with community palliative care, may be the best way to honor her wish. Discuss with the family that 'terminal' does not mean we stop treating reversible distress.