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Investigators who developed the Mercy method of estimating pediatric weight prospectively compared the performance of the 2D- and 3D-Mercy TAPE with the Broselow tape method in 624 children aged 2 months to 16 years (median age, 8.5 years; 77% white). The 2D-Mercy TAPE is a two-sided tape that measures humeral length on one side and mid-upper arm circumference on the other; the 3D- device is a single-sided tape that is folded to measure the mid-upper arm circumference and half-humeral length from a single position. Each length measurement corresponds to a weight value, with total estimated weight calculated by the sum of these fractional values.
Based on body mass indexes, 4% of children were underweight, 57% were normal weight, 14% were ove…