SU992044A1 - Device for dissection of tissue - Google Patents

Description

(54) DEVICE FOR CUTTING TISSUES

one

The invention relates to medicine, namely to devices for dissecting the femur, and can be used for the operative correction of the axis of the femur or for the extension of the femur.

A device is known comprising a housing and a cutting element for cutting tissue 1.

This device does not allow osteotomy from the side of the medullary canal.

The closest in technical essence and the achieved result to the proposed is a device for dissecting tissues, comprising a housing with a groove and a handle and a cutting element with a brush, installed in the groove of the housing with the possibility of extension 2.

However, this device also does not allow longitudinal osteotomy on the side of the medullary canal of the femur in places of excess bone tissue, which often forms in the region of the fusion of fragments. This is because the cutting element of the known device can extend only 2/3 of its length from the body, equal to the diameter of the body.

and excess bone tissue is often 2-3 times the diameter of normal parts of the femur.

The purpose of the invention is to achieve the possibility of carrying out the longitudinal osteo-tomy of excess bone tissue.

To achieve this goal, in a tissue cutting device, comprising a body with a groove and a handle, a cutting element with a tongue mounted in the housing groove with extension, the handle is connected to the housing with a threaded connection and provided with a thrust placed in the housing groove connected a plate that is hingedly connected to the cutting element, the cutting element being made with an oblique groove, and the specified pin is installed in the plates, near the body and in the oblique groove of the cutting element.

Claims (2)

FIG. 1 shows a device, a general view; in fig. 2 - section aa and n of fig. one; in fig. 3 - housing device in FIG. 4 is a section BB in FIG. 5 in FIG. 5 is a sectional view in FIG. 3; n FIG. 6 is a cross-section of the FIG. 3; in fig. 7 the working part of the device (the cutting element is extended beyond the side surface of the housing); in fig. 8 is a diagram of the introduction of the device into the femur; in fig. 9 is a scheme for initiating an osteotomy (the cutting part is removed from the body and partially hammered into the excess bone tissue). The device comprises a housing -1 with a handle 2, a cooperating threaded connection 3 with a threaded connection 4 of the housing 1, from which a groove 5 starts for the thrust 6, which with a protrusion 7 interacts with the annular groove 8 of the handle 2, and on the other side is pivotally connected the plates 9 with the clutch 10, passing through the window 11 of the housing I. The plates 9 at the other end are interconnected by a pin 12, passing through the longitudinal windows 13 of the housing 1 and through the oblique groove 14 of the cutting element 15, the end 16 of which is pointed, and the second rotated on the clip 17, held by es enclosure 1. The plates 9 are moved during operation of the device -Time in the recesses 18 of the housing 1 and the assembly does not extend beyond the outer circumference of the housing. The device works and is applied as follows. The patient is placed on the side, the operated limb is bent at the knee and hip joints (Fig. 5). A large skewer 19 makes a cut 20, drills the channel and the device according to ed. St. 707579 produces a Z-shaped osteotomy. At the same time, the areas of excess bone tissue 21 are partially cut, and the areas of normal bone 22 are through. Also through the intersection of the bone across (Fig. 6). The body 1 is inserted into the channel 23 of the medullary canal of the femur with the cutting part recessed into the groove 5. Then, turning the handle 2, the ledge 7 pulls the plates 9 towards the handle 2 through the pull 6. The pin 12 begins to move simultaneously in an oblique groove 14 and a window 13 and extends the cutting part of the cutting element 15 beyond the side surface of the body 1. A hammer is struck at the end of the body 1. If necessary, the cutting element 15 is extended and hit until the excess bone tissue 21 is broken, which splits the Pointed end 16 with a handle 2 immersed in the housing 1, rotated 180 °, and likewise supplied with the second half of the excess bone tissue 21, after which the device is removed from the channel 23 of the thigh. The hip lengthening after constriction and healing of wounds is performed by any known apparatus installed after osteotomy. The proposed device has an advantage over the known ones, since it allows, without destroying the soft tissues in the healthy areas of the femur, to approach locally to the site of excess bone tissue and to perform its longitudinal osteotomy. Claims A device for dissecting tissues, comprising a body with a groove and a handle, a cutting element with a tongue mounted in the groove of the body with extension, characterized in that, in order to be able to perform longitudinal osteotomy of excess bone tissue, the handle is connected to the body by a threaded connection and provided with a thrust placed in a groove of the body, associated with thrust plates, which are hingedly connected to the cutting element, the cutting element being made with an oblique groove, and said pin is installed in the plates, in housing window and in the oblique groove of the cutting element. Sources of information taken into account in the examination 1. The author's certificate of the USSR Ho 136970, cl. A 61 B 17/16, 1978. 2. USSR author's certificate No. 713564, cl. A 61 B 17/16, 1977. / 5 / 5x5 / J-. Yu // - / 5iO18 // X L a -eight FIG. 6-6 Fig.Z Yr Fy 6 Fig-5 7 DD cleared 2f 22/920 Fig.8 1 nineteen yy 21