SU1578734A1 - Model of fracture of distal section of shoulder bone - Google Patents

Abstract

The invention relates to teaching aids for traumatology and orthopedics, and allows for increased consistency in demonstrating possible mutual positions of fragments and bones. The model contains a bracket on which mechanisms for fixation of the humerus 5 and the forearm bones are mounted, made in the form of female-shaped holders 6 and clamps 7, connected by a screw 8. To realize angular and linear displacements of bones and fragments, angular and linear displacements are used as far as possible from the elbow joint of cylindrical bulges 13, 14 with large-scale nets. The lateral displacement is performed by the lateral displacement mechanism, which is fixed on the bracket and is a housing 15 with a scale of 16, an adjusting screw 18 and guides 17. 1 sludge.

Description

The invention relates to medicine, in particular to training manuals on traumatology and orthopedics, and can be applied in medical educational institutions as an in-depth manual.

The aim of the invention is to increase the consistency in demonstrating the possible mutual positions of fragments and bones.

In addition, the model makes it possible to work out methods for conducting radiological studies in determining the size of fragments displacements.

The drawing schematically shows a model of a fracture of the distal end of the humerus.

The fracture model consists of a bracket on which the mechanisms of fixation of the humerus are mounted, the mechanism of fixation of the bones of the forearm, means for carrying out linear and angular displacements of the bones

The bracket is a vertical plate 1 with a support 2 in the form of a round rod, perpendicular to the plate 1, and a support 3, in the form of an adjustable helical rack. Plate 1 has a notch 4. All the structural elements of the model are located on the opposite side of the plate so that when working out the techniques of X-ray diffraction in the lateral projection, nothing prevents the plate from being placed on the table.

00

00 4

ten

IS

gene apparatus and placing on the table a cassette with a film.

The humeral fixation mechanism is designed to hold the humerus 5 (its proximal fragment) 0 It consists of a holder 6 and a clamp 7, covering the bone and connected with a screw 8 "

The bone fixation mechanism of the forearm serves to hold the bones of the forearm 9, consists of a holder 10 and a clamp 11, covering the bones 9 and connected with a screw 12 Bones 9 are a group of connected, for example, tape, bones: radiation, elbow and distal fragments of the humerus,

Means for carrying out the displacements consist of the following parts: artificial cylindrical thickenings 13 (on the humerus) and 14 (on the bones of the forearm), coaxial axes, with scale grids of linear (in millimeters) and angular (in degrees) on the cylinders offsets; the mechanism of lateral displacement of the bone 5 in the form of a housing 15 fixed on an arm with a scale 16, two guides 17 and an adjusting screw 18, 30 on which a bone fixation mechanism 5 is mounted, the holder 6 of which has a movable connection with the guides and a threaded connection with screw 18.

Regarding the plate 1, the axes of the bones 5 and 9 are located at a distance of not

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To make the bone move in length and rotate, the screw 8 or 12 is loosened and the bone is displaced or rotated by the required amount, which can be removed along the scale grid applied to the bulges 13 and 140. Then the bone is fixed again with the help of a clamping screw.

Lateral displacement of the bones is performed by moving the bone 5 relative to the bone 9. On this, the adjusting screw 18 rotates, and the holder 6 moves along the guides 17.

On the bracket plate 1, holes q are provided for fastening the housing 15, allowing the angle 0 to change between bones 5 and 9. As a result, bones 5 and 9 can be attached to any mutual positions encountered in practice

For direct radiography, a cassette 19 is placed under the elbow joint (as shown in the drawing), the model is rotated and placed on the X-ray machine with the back side of plate 1, and a plate 1 is placed in the notch 4 of the plate 1 under the elbow joint.

If necessary, rotate the bracket in a vertical plane (for example, when the angle is about to change), coinciding with the surface of the plate 1, rotate the screw 3.

20

25

35

less than a quarter of the length of the x-ray film.

Thickening 13 and 14 on the bone and the mechanisms of fixation are as far as possible from the elbow joint. The thickenings are made of polymeric materials, for example, epoxy resin, as the most accessible and easy-to-use material.

The thickening 14 is made coaxially with the ulna, and a cut is made under the radius. Connecting them with each other as well as with distal CQs mounted on an arm, placed by the humeral bone fragment, make it possible for models on one side of the arm not to be complicated, and, if necessary, made into

change their relative position.

The model is used as follows .55

In the assembled model, the bones 5 and 9 are laid at a given angle b on the holders 6 and 10 and clamped by the clamps 7 and And with screws 8 and 12,

Claims (1)

Formula of the Invention Model of a distal humerus fracture, containing bones of the forearm and fragments of the humerus, characterized in that, in order to increase its visibility in demonstrating possible mutual positions of fragments and bones, a bracket in the form of a vertical plate with supports was inserted into it, the mechanism of fixation of the humerus and the mechanism of fixation of the bones of the forearm, fixation of the holders and clamps connected by a screw, two mechanisms of angular and linear displacements as far as possible from the elbow joint and placed coaxially on the bone with cylindrical bulges with scale grids applied to them and 51578734 the mechanism of lateral displacement in the video guides, passing through the body of the wrist fastened on the bracket, made in one month by the scale, with the adjusting screw of the ihanisms. 12 1B P 18