Upperto Lower Segment Ratio

Definition The ratio of the length of the upper part of the body to the length of the lower part of the body.

Landmarks The lower segment is measured from the top of the middle part of the public bone to the sole of the foot (Fig. 8.52). The upper segment is measured from the top of the middle part of the pubic bone to the top of the head. Upper segment and lower segment together equal total height.

Instruments Tape-measure or calipers

Position The individual is standing upright, and the top of the pubic bone is palpated.

Remarks In infants the upper segment approximately equals the sitting height. In older children and adults, the lower segment can be measured and subtracted from the height to establish the upper segment length. Normal values for upper and lower segment lengths to age 16 years are shown in Figs. 8.53 and 8.54. The upper-to-lower segment ratio

Figure 8.52 Measuring the lower segment in infants (a) and adults (b).

Upper segment Height Lower segment

Lower segment Lower segment

Figure 8.52 Measuring the lower segment in infants (a) and adults (b).

Upper Lower Segment Ratio
(b)
Upper Lower Segment Ratio
Figure 8.53 Upper segment length, both sexes, birth to 16 years. From Headings (1975), by permission.

decreases progressively during childhood.Adult males have smaller upper-to-lower segment ratios than females, since they generally have relatively longer legs.

Upper-to-lower segment ratios are useful in defining different forms of disproportionate growth and in distinguishing them from immaturity or retarded growth.

There are ethnic and family differences in the upper-to-lower segment ratio. As a generalization, the ratio is greater than 1.0 below age 10 years, 1.0 at 10 years at age, and less than 1.0 after age 10 years (Fig. 8.55).

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Responses

  • dieter weber
    How to measure upper to lower segment ratio in an an infant?
    6 years ago
  • kathrin
    How to compute for the upper to lower segment ratio?
    5 years ago
  • rudigar
    How to measure upper body lower body ratio?
    5 years ago
  • Ellis Baugh
    How to measure upper to lower body segment ratio?
    5 years ago
  • christian
    How to calculate upper to lower segment ratio?
    5 years ago
  • Oliwia
    What is a normal upper segment to lower segment ratio?
    5 years ago
  • matthias
    When are upper/lower segment ratios performed?
    5 years ago
  • Bryan
    How to measure head to body ratio?
    5 years ago
  • Gundobad
    How to calculate upper segment lower segment ratio in infants?
    4 years ago
  • meaza
    When should the upper/lower segment ratio be calculated?
    4 years ago
  • fnan
    How to measure upper segment lower segment ratio in children?
    4 years ago
  • CASTORE
    How to measure upper and lower body segments for marfans diagnosis?
    3 years ago
  • GABRIELE FUCHS
    When should upper/lower segment ratios be calculated?
    2 years ago
  • Kinfe
    How to measure lower segment marafans?
    1 month ago
  • Robert
    How to correctly measure lower segment?
    6 days ago

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