Rock quotient

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The rock quotient (FQ for short) is a measure of the body proportions of women, which was used in medicine and especially in plastic surgery . It was introduced by C. Fels in 1995, but could not prevail due to a lack of objectivity and a lack of attention to constitutional factors.

determination

The chest circumference in centimeters and the total percent body fat percentage serve as a basis for calculating the FQ, wherein the chest circumference than the circumference of the upper body incl. Breasts at the level of the nipple is defined.

To determine the percentage of body fat, the thickness of the subcutaneous fat tissue (measured with special pliers) in different parts of the body (arm, stomach, thigh) was used in the past. In the meantime, a more precise measurement method is available with the electrical impedance measurement of the body. Using standardized conditions (time of day of the measurement, defined temperature, food, fluid intake), the impedance measurement delivers values ​​that are significantly more reliable than the clamp measurement.

The quotient of the chest circumference in centimeters and the percentage of body fat is subject to a normal distribution. The ideal dimension is given as a z-value and is set to 1:

  • z> 1 = large chest size and relatively small body fat percentage
  • z <1 = small chest size and relatively large body fat percentage

application

In the past, the FQ was used in plastic surgery or in “aesthetic surgery” to justify the indication for breast enlargement or reduction . Due to a lack of objectivity and a lack of consideration of constitutional factors, the FQ has not been able to establish itself and is only mentioned sporadically in the literature.

Individual evidence

  1. ↑ C. Fels: Body proportions and their application in plastic breast surgery. Handchir. Microchir. plast.Chir. 12 (1995) pp. 363-364