DEVICE FOR MEASURING ANTHROPOMETRICAL VALUES OF LONG TUBULAR BONES Russian patent published in 2005 - IPC

FIELD: medical engineering.

SUBSTANCE: device is manufactured from transparent polymethyl methacrylate of 1 cm in thickness. The device has base, fastening belts and opening. The base is rectangular and has width of 40 cm and length of 60 cm. Rulers of different direction are available on upper base surface edges scaled from 56,0 to 0,0 cm and having tick value of 0.1 cm. Three angular scales are available as 90є-0є-90є protractors having their centers arranged in the middle of base width near the supporting platform of radii 20,0; 30,0 and 40,0 cm. Protractor scale tick value is equal to 1 grade. Five through holes are available on each side some distance far from lateral surfaces of the base. The holes are arranged at the level of 10, 19, 28, 37 and 46 cm and are used for attaching the fastening belts and fixing the device in folded state. Four holes of diameters 0,5 and 0,3 cm are available on each side some distance far from the frontal and back base edge for fixing walls. Flexible thread is available on the lower base surface. The thread is tightly attached to the rest side center and is easily movable on the opposite side. The thread is used for drawing longitudinal bone axis. Flexible thread is attached to lateral surfaces by means of sliding clamps for drawing additional bone axes. Device for measuring angles (protractor of radius 20 cm) is attached to the measuring side by means of fastening stainless steel members at an angle of 90є. Two holes united with base holes of diameter 0,3 cm are available on the lower wall surface for making fixation by means of screws, two built-in rods of diameter 0,3 cm enable one to rigidly attach the wall to the base. Easily movable arrow-ruler having tick value equal to 0.1cm and reading origin at the upper plane of device base, is mounted on below the frontal surface of the protractor by means of fastening member. 0є-90є-0є scale of tick value equal to 1 grade is available at the top on the frontal protractor surface with reading origin set on upper base surface. One hole on each side is available some distance far from lateral surfaces for folding the device by making protractor wall close to the upper base surface. Supporting wall of 8,0 cm in height and width equal to base width is attached at an angle of 90є to base supporting wall by means of screws and stainless steel rods built-in into the supporting wall. The wall is 1,0 cm thick. Two holes united with base holes of diameter 0,3 cm are available on the lower supporting wall surface for making fixation by means of supporting screws. Two built-in rods of diameter 0,3 cm enable one to rigidly attach the wall to the base. One hole on each side is available some distance far from lateral surfaces for folding the device by making the supporting wall close to the upper base surface, when transporting the device.

EFFECT: high accuracy of measurements.

13 cl