Inpatientvs. outpatient bowel preparation for elective colorectal surgery

BACKGROUND: Recent pressures to decrease the cost of medical care have mandated preoperative outpatient bowel preparation (OBP) for elective colorectal surgery without any data documenting equivalent quality of care. This study examined the safety and efficacy of OBP compared with inpatient bowel preparation (IBP). METHODS: Records of all patients who underwent OBP for elective colorectal resection since the inception of the OBP program from July 1993 to June 1994 were compared with records of all patients who received IBP for elective procedures from January to June 1993. RESULTS: The two groups, 90 patients who underwent OBP and 98 patient who had IBP, were well matched for age, sex, diagnosis, and operations performed. The OBP group had a shorter length of hospital stay (median, 7vs.9 days;P< 0.0001; chi-squared analysis), whereas the complication rate was similar (19 percent in the OBP groupvs.18 percent in the IBP group), including infectious complications (10 percent in the OBP groupvs.7 percent in the IBP group). Although operating time was similar (mean, 199vs.213 minutes) and estimated blood loss (mean, 528vs.536 ml), the OBP group had significantly higher perioperative fluid requirements: intraoperative fluids (median, 4300vs.3700 ml;P< 0.05; Student'st-test), intraoperative colloid administration (48vs.29 percent;P< 0.0002; chi-squared), 24-hour postoperative fluids (3224vs.2700 ml;P< 0.0001; Student'st-test), and postoperative fluid challenges (50vs.20 percent;P<0.0001; chi-squared analysis). CONCLUSION: Outpatient bowel preparation for elective colorectal surgery is safe and effective. It offers shorter hospital stay, and, therefore, potentially reduces medical care cost. Patients with multiple medical problems may not tolerate extensive fluid shifts; therefore, other preoperative arrangements, such as inpatient or outpatient intravenous fluid therapy, need to be considered to minimize complications that may outweigh potential cost savings.Poster presentation at the meeting of The American Society of Colon and Rectal Surgeons, Montreal, Quebec, Canada, May 7 to 12, 1995.