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Table 13 Figure-of-eight swelling measurements: Overall Study Results

From: Prospective study of recovery from copperhead snake envenomation: an observational study

  Discharge Day 3 Day 7 Day 14 Day 21 Day 28
  Median Range Median Range Median Range Median Range Median Range Median Range
Upper extremity measurement (cm) 47.0 38.0, 51.8 46.7 38.0, 51.6 45.0 37.5, 50.5 45.0 37.5, 51.5 45.5 37.5, 50.0 46.5 37.2, 50.3
Upper extremity, difference from measurement at hospital discharge (cm) -- -- −0.9 −3.5, 0.0 −2.0 −3.7, 0.0 −2.0 −3.6, +0.1 −2.8 −4.0, 0.5 −1.3 −3.8, +1.0
Lower extremity measurement (cm) 54.5 49.3, 61.0 55.8 49.0, 61.1 53.9 46.5, 60.8 52.0 47.0, 60.2 51.8 46.7, 56.5 52.0 46.4, 57.0
Lower extremity, difference from measurement at hospital discharge (cm) -- -- +0.5 −2.5, +3.5 −1.3 −2.8, +1.4 −2.2 −3.5, +1.0 −2.7 −4.5, +0.5 −2.7 −4.5, +1.0
  1. Measurements around the wrist/hand or ankle/foot [23-26]. Upper extremity measurements based on 10 subjects with upper extremity envenomation except for the Day 7 and Day 14 measurements (n-9). Lower extremity measurements based on 10 subjects with lower extremity envenomation except for the Day 3 measurement (n = 9). Higher numbers indicate more swelling. The day of envenomation is Day 0.