title: A prospective observational study comparing a physiological scoring system with time-based discharge criteria in pediatric ambulatory surgical patients.
abstract: OBJECTIVE
  Discharge criteria based on physiological scoring systems can be used in the postanesthesia care unit (PACU) to fast-track patients after ambulatory surgery; however, studies comparing physiological scoring systems with traditional time-based discharge criteria are lacking. The purpose of this study was to compare PACU discharge readiness times using physiological vs time-based discharge criteria in pediatric ambulatory surgical patients.
  
  
  METHODS
  We recorded physiological observations from consecutive American Society of Anesthesiologists physical status I-III patients aged 1-18 yr who were admitted to the PACU after undergoing ambulatory surgery in a tertiary academic pediatric hospital. The physiological score was a combination of the Aldrete and Chung systems. Scores were recorded every 15 min starting upon arrival in the PACU. Patients were considered fit for discharge once they attained a score ≥12 (maximum score, 14), provided no score was zero, with the time to achieve a score ≥12 defining the criteria-based discharge (CBD) time. Patients were discharged from the PACU when both the CBD and the existing time-based discharge (TBD) criteria were met. The CBD and TBD data were compared using Kaplan-Meier and log-rank analysis.
  
  
  RESULTS
  Observations from 506 children are presented. Median (interquartile range [IQR]) age was 5.5 [2.8-9.9] yr. Median [IQR] CBD and TBD PACU discharge readiness times were 30 [15-45] min and 60 [45-60] min, respectively. Analysis of Kaplan-Meier curves indicated a significant difference in discharge times using the different criteria (hazard ratio, 5.43; 95% confidence interval, 4.51 to 6.53; P < 0.001). All patients were discharged home without incident.
  
  
  CONCLUSIONS
  This prospective study suggests that discharge decisions based on physiological criteria have the potential for significantly speeding the transit of children through the PACU, thereby enhancing PACU efficiency and resource utilization.
authors.affiliation: Department of Anesthesia and Pain Medicine, The Hospital for Sick Children, University of Toronto, 555 University Avenue, Toronto, ON, M5G 1X8, Canada.
authors.forename: James
authors.initials: J
authors.lastname: Armstrong
authors.forename: Helen
authors.initials: H
authors.lastname: Forrest
authors.forename: Mark W
authors.initials: MW
authors.lastname: Crawford
mesh_terms: D000293:Adolescent; D000556:Ambulatory Surgical Procedures / Q000379:methods*; D000762:Anesthesia Recovery Period; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D053208:Kaplan-Meier Estimate; D010351:Patient Discharge / Q000592:standards*; D011446:Prospective Studies; D062606:Tertiary Care Centers; D013997:Time Factors