RU2234870C1 - Instrument for withdrawal of elongated tubular bones from pivotal joints - Google Patents

Abstract

FIELD: surgical instruments for withdrawal of whole bones, may be used in forensic medicine.

SUBSTANCE: instrument has working part and handle. Working part has oval-spherical spoon-like shape, with end portion being defined by two side edges arranged at acute angles. One of edges is made sharpened and arc-shaped, with arc facing with its concave portion to center of working part. Other edge is made with obtuse faces and adapted for delaminating/separating of soft tissues from bone.

EFFECT: increased efficiency by avoiding additional damage to joint fragments and, accordingly, provision for full-value withdrawal of bone head.

2 cl, 2 dwg

Description

The invention relates to medical equipment and, in particular, to surgical instruments for bone removal entirely and can be used in forensic medicine.

To extract bone preparations, exarticulation from articulated joints, rib knives or scalpels are used (A.T. Khazanov, I.A. Chalisov Sectional course manual, 1984). But the disadvantage of these tools is that they injure the object - the head of the bone and articular cavity, destroying the hyaline cartilage, as they cannot penetrate the joint cavity due to its curvature, narrowness of the joint gap, and when the humerus, femurs are removed (exarticulation) - and a powerful intraarticular ligament. With surgical interventions, or with a forensic study of intraarticular fractures in the usual way, additional trauma to the fragments of the joint occurs, which prevents the complete removal of the bone head and subsequent fractological examination.

The task is to eliminate additional trauma to the fragments of the joint, which prevents the complete removal of the bone head through the use of a special tool.

The tool for removing long tubular bones from the articulated joints consists of a working part and a handle. The working part has an oval-spherical spoon-shaped shape with an end formed by two lateral edges located at an acute angle. One of the edges is sharpened and has the shape of a curved arc, facing concavity to the center of the working part. The other edge is made obtuse to exfoliate / separate soft tissues from the bone. In particular cases of its implementation and / or use, the tool may contain a sharpened edge 30 mm long, a blunt edge 25 mm long, an angle between the side faces of 70 °, a handle 100 mm long and 25 mm in diameter.

The invention is illustrated by drawings, where figure 1 shows a side view of a tool for removing long tubular bones from articulated joints; figure 2 is a front view of this tool.

The tool for removing long tubular bones from the articulated joints contains an oval-spherical working part 1, elongated at one distal end and rounded at the opposite end to which the handle 2 is attached. The distal end of the working part 1 has an angular shape formed by two lateral edges of which one edge 3 is sharpened and has the shape of a concave arc facing concavity to the center of the working part 1, and the other edge 4 is obtuse and repeats the outlines of the working part 1 of the tool positive edge 3.

The tool has an oval-spherical shape in order to easily penetrate into the cavity of any articulated joint of a person, passing along the joint space of the joint, repeating the shape of the head of the joint, dissecting powerful intraarticular ligaments with an edge 3, while its concave shape facilitates efforts when crossing the internal ligaments, t .to. a reduction in the oncoming cutting angle reduces the force of resistance of the material during cutting. The blunt edge 4 is conveniently blunt (as is customary in surgery and forensic medicine) to peel / separate soft tissue from the bone.

Advantages of the proposed tool:

- reduction of joint trauma during exarticulation of the bone from the joint;

- facilitating the intersection of inaccessible intraarticular ligaments of spherical joints;

- facilitating the separation of soft tissues from the bone;

- a combination of a sharp object (scalpel) and a blunt object (spatula) in the tool.

Claims (2)

1. A tool for removing long tubular bones from articulated joints, consisting of a working part and a handle, characterized in that the working part has an oval-spherical spoon-shaped shape with an end formed by two lateral edges located at an acute angle, while one of the edges is sharpened and has the shape of a curved arc, facing concavity to the center of the working part, and the other edge is made obtuse for peeling / separation of soft tissues from the bone. 2. The tool according to claim 1, characterized in that the sharpened edge has a length of 30 mm, the obtuse edge has a length of 25 mm, the angle between the side edges is 70 °, the handle has a length of 100 mm and a diameter of 25 mm.

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