title: An assessment of the accuracy of a novel weight estimation device for children.
abstract: BACKGROUND
  We sought to validate the accuracy and assess the efficacy of a newly developed electronic weight estimation device (ie, the rolling tape) for paediatric weight estimation.
  
  
  METHODS
  We enrolled a convenience sample of children aged <17 years presenting to our emergency department who volunteered to participate in the study. The children's heights and weights were measured, and three researchers estimated these values using the rolling tape and Broselow tape at 5 min intervals. The weight estimates of researcher 1, researcher 2 and the Broselow tape were compared with measured values, and mean percentage error (MPE), root mean square error (RMSE) and percentage of estimates within 10% of the actual measured values were calculated. For 30 randomly selected subjects, we compared the time interval from the start of the measurement to the time that orders for epinephrine, defibrillation dose and instrument size could be given in a simulated arrest scenario.
  
  
  RESULTS
  We enrolled 906 children (median age 4.0 years). For researcher 1, researcher 2 and the Broselow tape, MPE values were 0.11% (RMSE 2.61 kg), 1.41% (RMSE, 2.61 kg) and 1.72% (RMSE 5.41 kg), respectively, and the percentages of children with predictions within 10% of their actual weight were 75.1%, 75.7% and 60.6%, respectively. In the 30 simulated cases, the mean time for measurement to ordering was significantly shorter (25.8 s vs 35.5 s, p<0.001) for the rolling tape compared with the Broselow tape method.
  
  
  CONCLUSIONS
  The rolling tape is a good weight estimation tool for children compared with other methods. The rolling tape method significantly decreased the time from weight estimation to orders for essential drug dose, instrument size and defibrillation dose for resuscitation.
authors.affiliation: Department of Emergency Medicine, Seoul National University Bundang Hospital, Seong-Nam, Korea.
authors.forename: Jae Yun
authors.initials: JY
authors.lastname: Jung
authors.affiliation: Department of Emergency Medicine, Seoul National University Hospital, Seoul, Korea.
authors.forename: Young Ho
authors.initials: YH
authors.lastname: Kwak
authors.affiliation: Department of Emergency Medicine, Seoul National University Hospital, Seoul, Korea.
authors.forename: Do Kyun
authors.initials: DK
authors.lastname: Kim
authors.affiliation: Department of Emergency Medicine, Seoul National University Hospital, Seoul, Korea.
authors.forename: Dongbum
authors.initials: D
authors.lastname: Suh
authors.affiliation: Department of Emergency Medicine, Seoul National University Hospital, Seoul, Korea.
authors.forename: Ikwan
authors.initials: I
authors.lastname: Chang
authors.affiliation: Interdisciplinary Programme of Bioengineering, Seoul National University Graduate School, Seoul, Korea.
authors.forename: Chiyul
authors.initials: C
authors.lastname: Yoon
authors.affiliation: Department of Biomedical Engineering, Seoul National University College of Medicine, Seoul, Korea.|Department of Biomedical Engineering, Seoul National University Hospital, Seoul, Korea.|Institute of Medical and Biological Engineering, Medical Research Centre, Seoul National University, Seoul, Korea.
authors.forename: Jung Chan
authors.initials: JC
authors.lastname: Lee
authors.affiliation: Department of Biomedical Engineering, Seoul National University College of Medicine, Seoul, Korea.|Department of Biomedical Engineering, Seoul National University Hospital, Seoul, Korea.|Institute of Medical and Biological Engineering, Medical Research Centre, Seoul National University, Seoul, Korea.
authors.forename: Hee Chan
authors.initials: HC
authors.lastname: Kim
authors.affiliation: Department of Emergency Medicine, Gachon University Gil Medical Centre, Incheon, Korea.
authors.forename: Jae Yeon
authors.initials: JY
authors.lastname: Choi
authors.affiliation: Department of Emergency Medicine, Seoul National University Hospital, Seoul, Korea.
authors.forename: HeeJeong
authors.identifier: http://orcid.org/0000-0002-1677-193X
authors.initials: H
authors.lastname: Ahn
mesh_terms: D000293:Adolescent; D000886:Anthropometry / Q000295:instrumentation / Q000379:methods*; D001835:Body Weight; D002648:Child; D002675:Child, Preschool; D004636:Emergency Service, Hospital / Q000458:organization & administration; D005260:Female; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D010372:Pediatrics / Q000379:methods; D056910:Republic of Korea; D014894:Weights and Measures / Q000295:instrumentation* / Q000592:standards*
keywords: paediatric emergency med; paediatric resuscitation; resuscitation