Consent and Capacity for Catheter Placement in a Confused Patient
An 82-year-old woman with advanced dementia and hospital-acquired pneumonia is referred for a PICC to receive 10 days of IV antibiotics. She is awake but confused, does not consistently recognize her surroundings, and cannot repeat back the risks and benefits of the procedure. Her daughter is present and says, 'Just put it in, she won't understand anyway.' There is no documented advance directive or healthcare proxy in the chart. The patient pulls at her IV lines and has removed a peripheral catheter twice.
1. How would you assess decision-making capacity, and who can consent?
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Capacity is decision-specific and assessed at the time of the decision. The relevant elements are whether the patient can:
- Understand the relevant information about the PICC (purpose, risks, alternatives).
- Appreciate how it applies to her situation.
- Reason about the options.
- Communicate a choice.
Her inability to repeat back risks and her disorientation suggest she likely lacks capacity for this decision, but the assessment should be documented explicitly rather than assumed from the dementia diagnosis alone.
Consent: because there is no documented proxy or advance directive, the daughter cannot simply consent on her own authority. The appropriate step is to identify the legally recognized surrogate under state law and facility policy (which may require a formal proxy designation or guardianship), and to involve the ethics committee or risk management if no surrogate can be identified. The daughter's statement that 'she won't understand anyway' is not sufficient authorization.
2. How do the patient's line-pulling behavior and the goal of therapy influence your recommendation?
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The behavior is clinically relevant: a patient who has pulled out peripheral lines twice is at high risk of self-removal of a PICC, which carries risks of air embolism, bleeding, and infection, and could interrupt the antibiotic course. This should be addressed in the plan - for example, a securement device, clothing, or increased supervision - and discussed with the team.
Regarding goals: if the pneumonia is treatable and the patient's overall goals favor curative treatment, a PICC is reasonable once consent is properly obtained. If the goals are comfort-focused, a prolonged IV antibiotic course may not align with the patient's wishes, and this should be clarified with the surrogate and care team before proceeding.
The judgment being tested is separating the technical question ('can we place a PICC?') from the ethical one ('should we, and who decides?'), and documenting both.