Altman et al have patented this already.

This study evaluates nurses' use of CHOICE, a handheld-computer-based support system for preference-based care planning, which assists nurses in eliciting patient's preferences for functional performance at the bedside. Specifically, it evaluates the effects of system use on nurses' care priorities, preference achievement, and patients' satisfaction.

A method for interviewing, eliciting responses and recording patient responses.

Abstract: ...it is important that patients be able to formulate and express preferences, ...made known to the clinician at the time of care, ...inform care activities. Decision theory and health informatics offer promising strategies...that drives health choices. Computer-based elicitation and reporting tools... attention toward building computer-based applications that support clinicians in the complex cognitive process of integrating patient preferences with scientific knowledge, clinical practice guidelines, and ...contemporary health care.