Examkin

Question

Difficulty: HardNeurocognitive Disorders

A 73-year-old retired architect is evaluated in the hospital for severe agitation. He was admitted 24 hours ago for cellulitis of the right lower extremity, for which wound cultures grew methicillin-resistant *Staphylococcus aureus* (MRSA). His medical history is significant for bipolar I disorder (not currently taking mood stabilizers), severe osteoarthritis (managed with scheduled tramadol), and a 3-year history of progressive cognitive decline, prominent visual hallucinations of small animals, and a resting tremor. He has a documented diagnosis of major neurocognitive disorder with Lewy bodies.

Currently, he is severely agitated, attempting to pull out his intravenous line, and striking at the nursing staff. He is unable to cooperate with a medical examination or verbal de-escalation. His husband, who is his legally appointed healthcare proxy, requests that the medical team administer medication to calm him down. However, the patient's daughter, who just arrived, demands that no mind-altering medications be given and suggests using physical restraints instead.

Which of the following is the most appropriate next step in the management of this patient?

  1. A
    Initiate intravenous linezolid to treat the cellulitis
  2. B
    Administer sertraline monotherapy for behavioral control
  3. Administer low-dose quetiapine with the husband's consentAnswer
  4. D
    Initiate risperidone therapy for schizophreniform disorder
  5. E
    Apply physical restraints as requested by the daughter

Answer

The most appropriate next step is to administer low-dose quetiapine with the consent of the patient's husband.
The correct action is to administer low-dose quetiapine. This patient has major neurocognitive disorder with Lewy bodies (DLB) and is presenting with acute delirium secondary to an infection, resulting in dangerous agitation. In DLB, patients have a severe sensitivity to neuroleptics (antipsychotics with strong dopamine D2 receptor antagonism, such as haloperidol or risperidone), which can cause irreversible parkinsonism, impaired consciousness, and autonomic dysfunction. When non-pharmacological interventions fail and the patient poses an immediate danger to themselves or staff, the safest pharmacological options are low-dose quetiapine or clozapine, as they have the lowest D2 receptor affinity. Furthermore, the patient's husband is the legally appointed healthcare proxy; his consent for pharmacological treatment legally overrides the daughter's objections.

Step-by-Step Solution

1
Identify the primary diagnosis and current acute complication.
The patient has Dementia with Lewy Bodies (DLB) and is experiencing acute hyperactive delirium secondary to an MRSA infection.
Understanding the underlying neurocognitive disorder is essential, as DLB dictates specific pharmacological contraindications.
2
Evaluate the ethical conflict regarding consent for treatment.
The husband's consent for pharmacological treatment is legally binding.
The husband is the legally appointed healthcare proxy, meaning his medical decisions override the conflicting requests of the daughter.
3
Select the most appropriate and safe intervention for severe agitation in DLB.
Low-dose quetiapine is the treatment of choice.
Patients with DLB have severe neuroleptic sensitivity. Typical antipsychotics and most atypicals (like risperidone) can cause life-threatening parkinsonism. Quetiapine has low D2 receptor affinity and is safer.
4
Rule out contraindicated medications based on the patient's history and current medication list.
Avoid linezolid (risk of serotonin syndrome with tramadol) and SSRI monotherapy (risk of manic switch in bipolar I).
Comprehensive management requires checking for dangerous drug-drug interactions and psychiatric contraindications.

Key Concept

Management of severe agitation in Dementia with Lewy Bodies (DLB)
Estimated Time:2m 0s
Rate this question

Topics

Neurocognitive Disorders

More questions from this topic