A 68-year-old man with severe, untreated major depression has a gangrenous diabetic foot ulcer. The surgical team recommends a life-saving below-the-knee amputation. The patient refuses, stating, "It doesn't matter, I'm a worthless person and I deserve to die anyway." He can repeat the risks of refusal but consistently links his decision to feelings of worthlessness.
What is the most appropriate next action?
- Request an urgent psychiatric consultation to formally assess his decision-making capacity. (correct answer)
- Respect the patient's decision and provide wound care and antibiotics only.
- Seek a court order to compel the surgery.
- Initiate an SSRI and re-address the surgery in 4-6 weeks.
Explanation: While adults generally have the right to refuse medical treatment, this right depends on their having decision-making capacity. Capacity can be compromised by a psychiatric condition like severe depression. Because the patient's refusal is directly linked to depressive cognitions ("I deserve to die"), there is a strong reason to suspect he lacks capacity to make this specific decision. The most appropriate next step is to obtain a formal psychiatric consultation to assess capacity. Proceeding with a court order is premature without this assessment. Respecting the decision would be inappropriate if it is not capacitous. Waiting for an SSRI to work is not feasible given the urgent, life-threatening nature of the gangrene.