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Ann Emerg Med. 2013 Oct;62(4):332-339.e6. doi: 10.1016/j.annemergmed.2013.02.021. Epub 2013 Apr 17.

Evaluation of the Mercy TAPE: performance against the standard for pediatric weight estimation.

Author information

1
Division of Clinical Pharmacology and Medical Toxicology, Children's Mercy Hospitals and Clinics, Kansas City, MO, and the Department of Pediatrics, University of Missouri-Kansas City, School of Medicine, Kansas City, MO. Electronic address: srahman@cmh.edu.

Abstract

STUDY OBJECTIVE:

We assessed the performance of 2 new devices (2D- and 3D-Mercy TAPE) to implement the Mercy Method for pediatric weight estimation and contrasted their accuracy with the Broselow method.

METHODS:

We enrolled children aged 2 months through 16 years in this prospective, multicenter, observational study. Height/length, weight, humeral length, and mid-upper arm circumference were obtained for each child, using calibrated scales and measures. We then made measurements with blinded versions of the 2D- and 3D-TAPEs. Using height/length data, we calculated the weight estimated by the Broselow method. We contrasted measures with mean error, mean percentage error, and percentage predicted within 10% and 20% of actual.

RESULTS:

Six hundred twenty-four participants (median 8.5 years, 27.6 kg, 17.3 kg/m(2)) completed the study. Mean error was 0.3 kg (mean percentage error 1.6%), 0.2 kg (mean percentage error 1.9%), and -1.3 kg (mean percentage error -4.1%) for 2D-, 3D-, and Broselow, respectively. Concordance between both TAPE devices and the Mercy Method was greater than 0.99. The proportion of children predicted within 10% and 20% of actual weight was 76% and 98% for the 2D-TAPE and 65% and 93% for the 3D-TAPE. Excluding the 209 (33%) children who were too tall for the device, Broselow predictions were within 10% and 20% of actual weight in 59% and 91%.

CONCLUSION:

The 2D- and 3D-Mercy TAPEs outperform the Broselow tape for pediatric weight estimation and can be used in a wider range of children.

TRIAL REGISTRATION:

ClinicalTrials.gov NCT01507090.

PMID:
23602655
PMCID:
PMC4039210
DOI:
10.1016/j.annemergmed.2013.02.021
[Indexed for MEDLINE]
Free PMC Article
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