SU39327A1 - Rahiotom - Google Patents

Description

Existing methods and tools for dissecting the spinal cord have many disadvantages. In order to open the spinal cord with an ordinary rachyotomy (Luer double saw), you need to turn the corpse upside down, cut soft parts over the vertebrae, manually cut the vertebrae, and it is easy to cut the intervertebral y3J bi, and it is very difficult to cut the arches near the occipital bone . To get the spinal cord with the brain, you need to rotate the corpse twice. All this together makes you spend a lot of time and labor on the autopsy.

The proposed version is free from the listed drawbacks. The disc is opened by the disk rachiotomy from the abdominal cavity after complete evisceration. A lumbar vertebra is cut out at the promontory (promontorium), a plate protecting the spinal cord, protruding beyond the cutting edge of the saw, is inserted into the spinal canal through the resulting opening and sawed in a plane parallel to the spinal cord, the cutting line goes at the level of attachment of the arms to vertebral bodies. The naked spinal cord is pulled out along with the brain in the usual way.

(137)

This device can be used to cut a cranial cap and cut other bones.

In the attached drawing of FIG. 1 depicts a rachiot in longitudinal section; FIG. 2 is the same, in cross section, passing through the axis of rotation of the saw blade (along the line AB of FIG. 1).

The proposed drill consists of a circular saw J, clamped by screws 4 between a horizontal gear 2 and a blade 5, mounted together with the saw in a key on the axle shaft 5 mounted on bearings 7. The shaft 5 is rotated through bevel gears

2 and 5, of which vertical gear 6, 1.5 cm in diameter, is equipped with half as many teeth as horizontal gear 2, having a diameter of 3 cm. Vertical gear 6 is mounted on a shaft 2 mounted on bearings connected to an electric motor with Ve to / 10

HP or with any other appropriate engine.

The entire mechanism of the device is enclosed in a case //, from which only a small segment of the blade with a width of

3ml {; the rear of the saw remains always completely closed. The upper and lower halves of the casing are screwed together with screws 12. The edge of the casing does not touch the saw, leaving a gap between it and the saw. To protect against the contamination of the transfer mechanism, leather or hard visors 75 are attached to the edges of this slot, on the upper and lower sides, and are in contact with flat saw surfaces. On the midline of the bottom surface of the casing, a plate 14 is installed (11 cm) narrow (17 mm), moving longitudinally in a bracket 15, fixed in the middle of the casing and fitted with a fastening screw 77. At the rear end of the plate 14 there is a tooth-shaped lock 16 for fixing it in the forward position, in which it, protruding behind the teeth of the saws, prevents deeper soft tissues (brain, nerve cracks, etc.) from accidental wounding.

The subject matter of the invention.

L Rahiotom with a circular saw driven through a gear drive from a mechanical engine, characterized in that the saw blade / vertebra for spreading the vertebrae is placed in a small open segment of the case that has a lower surface that serves to protect soft parts. from accidental damage to the plate 14, movable in the bracket 15 and fixed in the working position by means of a tooth-shaped lock 16 mounted on the tail end.

2. In the rachiotome according to claim 1, use the slot-passing through 7 saw-through opening in the case 77 to protect the inside of the case 77 from accidental soiling of the visors 75 that are in contact with their edges with the flat sides of the saw 7.