A knowledge-based decision support system for prevention and treatment of pressure ulcers.

As part of a research project intended to provide problem-based knowledge to clinicians at the point of care, we have developed a system that supports the nurse's development of patient-specific, guideline-based treatment plans for patients who have pressure ulcers or are at risk for developing them. The system captures coded data about assessment, diagnosis and interventions using a point-and-click interface. Knowledge is accessible to the user via: 1) hypertext links from the data entry screens; 2) explicit entry into an indexed version of the guideline; 3) imbedded knowledge-based rules that critique the diagnosis and offer guidance for treatment; and 4) explicit entry into interactive algorithms. The system has been implemented experimentally on one care unit at our hospital, where its impact will be assessed in comparison with a control unit. Data on 113 patients were entered during the 21-week experimental period. The system is being evaluated for its instructional adequacy, its impact on clinicians' decision-making and knowledge, and on processes of care. Users' perceptions of the system are also being evaluated. Dissemination issues in the context of today's health care environment are addressed.