The effects of a practice guideline on endoscopic sinus surgery at an academic center

Practice guidelines (PG) (or clinical pathways) are increasingly important tools for standardizing health care delivery, improving efficiency, monitoring quality, and controlling costs. Health services researchers divide the delivery of health care into three stages: structure, process, and outcome. PGs are a technique to standardize the process of health care delivery, which may result in improved clinical outcomes or may maintain clinical outcomes while increasing process efficiency and decreasing costs. We describe the development and implementation of a PG for endoscopic sinus surgery at an academic center, and report preliminary results on the effects of the PG on the health care process. The PG was developed using a multidisciplinary combination of consensus-building and evidence-based techniques. Initially, participation in the PG was voluntary and at the attending physician's discretion. One year after implementation of the PG, 41 patients had been enrolled by members of the medical school's full-time faculty. Process and short-term outcome variables on those patients were compared to a random sample of 50 patients treated by the same physicians, but not using the PG. There was no evidence of selection bias into the PG based on demographics, severity of sinusitis, or the presence of comorbid factors. There were no differences in time spent in the operating room, postanesthesia care unit, or day surgery observation unit, between patients using the PG and not using the PG. However, patients not using the PG had a significantly higher rate of unplanned admission. Patients using the PG had significantly lower median hospital costs and charges than did patients not using the PG. In addition, median hospital costs and charges decreased steadily for all patients (not just those using the PG), simultaneous with the development and implementation of the PG. There were no differences in short-term clinical outcomes between PG and non-PG patients. In summary, the development and implementation of a PG for endoscopic sinus surgery resulted in lower hospital costs and charges while maintaining acceptable short-term clinical outcomes. PGs have important implications for improving the efficiency of the health care process.