Method of Determining Body Thickness from Weight and Height

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  • 体重と身長から体厚を求める方法
  • 臨床技術 体重と身長から体厚を求める方法
  • リンショウ ギジュツ タイジュウ ト シンチョウ カラ タイコウ オ モトメル ホウホウ

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With attention given to the fact that information on weight and height is available in advance from electronic medical charts, we devised a method for determining body thickness on the basis of a simple calculation. The formula is as follows: body thickness=weighta×heightb×f. In order to obtain body thickness from the above formula, it is necessary to determine optimal factors of a, b, and f. Therefore, the formula is modified to give f=body thickness/weighta×heightb. Then, a multiplier of a with b is changed to determine a combination in which f is varied to the smallest extent. Every site of the body is checked to find that an optimal multiplier of a with b is weight0.6×height–0.8. This multiplier is applicable to all sites of the body. Then, f is given as a median of 15 to 74 cases in which calculation is made for each case based on the formula of weight0.6×height–0.8 and the body thickness. A difference between calculation values and measured values is equivalent to the variation of f in which the median is given as 100%. The variation of f at all sites of the body is 3% to 11% in terms of average absolute deviation. The calculation difference is obtained by the formula of body thickness×average absolute deviation. Where the calculation difference is within the above range, clinical practices will be influenced to a small extent. Thus, this study will provide an effective method for determining body thickness.

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