RU163813U1 - TOOL FOR REMOVING INTRAMEDOLLARY STRUCTURES - Google Patents

Abstract

A tool for removing intramedullary structures, including a body with a shock pad and a cylindrical impactor, moved along the center of the body and centered on it, characterized in that the device body consists of three hollow metal cylinders of the same diameter, connected to each other by threaded connections, moreover, the first cylinder of the housing has a T-shaped impact pad at one end, and an external thread for connecting to the second cylinder at the other end; the second cylinder has an internal thread at one end for connection to the first cylinder, and an external thread at the other end for connection to a third cylinder; the third cylinder has an internal thread at one end for connecting to a second or first cylinder, and a nozzle for connecting to an intramedullary metal retainer at the opposite end; the hammer has a handle and is a hollow cylinder, the inner diameter of which exceeds the diameter of the cylinders of the tool body.

Description

The utility model relates to the field of medicine, in particular surgery, traumatology and orthopedics, and is a tool for removing intramedullary metal structures.

A device is known for extracting a hollow metal nail from the bone, characterized in that a metal rod with grooves is inserted into the lumen of the nail channel, which is firmly fixed to the nail by inserting a peg into the ear and groove, the presence of an anvil on the device handle facilitates its removal from the bone (1) . The disadvantage of this device is the fact that when the metal retainer is removed, it loosens and not knocks out, which causes difficulties in its extraction.

A device for removing intraosseous pins, consisting of a body with an electromagnetic shock mechanism and a handle (2). The design of this device is complicated, its sterilization is difficult. The use of such a device increases the complexity of the operation.

A device for removing pins from long bones is known, having a body in the form of a rod, a hook for connecting to an intramedullary pin, a hammer pad and a massive cylindrical hammer, coaxially moved along the rod's length and centered on it (3). This device provides the extraction of massive intramedullary pins from large tubular bones. The disadvantage of this device is the fixed length of the rod, which significantly lengthens the extraction time and does not allow the device to be used when migrating the metal fixator, its deep lying in the bone marrow canal. This device is taken by us as a prototype.

The purpose of creating a utility model is to simplify the extraction of intramedullary metal fixators, including during their migration and deep occurrence in the bone marrow canal.

This goal is achieved in that the housing of the device consists of three hollow metal cylinders of the same diameter, connected to each other by threaded connections, the first cylinder of the body having a T-shaped impact pad at one end, and an external thread for connecting to the second cylinder at the other end ; the second cylinder has an internal thread at one end for connection to the first cylinder, and an external thread at the other end for connection to a third cylinder; the third cylinder has an internal thread at one end for connecting to a second or first cylinder, and a nozzle for connecting to an intramedullary metal retainer at the opposite end; the hammer has a handle and is a hollow cylinder, the inner diameter of which exceeds the diameter of the cylinders of the tool body.

The technical result of using this tool is to simplify the procedure for removing metal from the bone. The presence of an intermediate second cylinder makes it possible to change the length of the body depending on the depth of the metal fixator in the bone marrow canal. The presence of a handle on the drummer of the instrument facilitates its capture by the doctor and the extraction process of the metal fixator. Elements of the device are easily assembled and disassembled and sterilized.

A tool for removing intramedullary structures consists of three hollow metal cylinders of the same diameter, connected to each other by threaded connections. The first cylinder of the housing has a T-shaped impact pad at one end, and an external thread for connecting to the second cylinder at the other end. The second cylinder has an internal thread at one end for connection to the first cylinder, and an external thread at the other end for connection to the third cylinder. The third cylinder has an internal thread at one end for connecting to the second or first cylinder, and a nozzle for connecting to the intramedullary metal fixator at the opposite end. The drummer of the tool has a handle and is a hollow cylinder, the inner diameter of which exceeds the diameter of the cylinders of the housing.

The utility model is illustrated by graphic material. The figure 1 shows the tool in an assembled form, ready for use. The tool has a housing (1), consisting of a first cylinder (2) having a T-shaped impact pad (3) at one end and an external thread (4) at the other; a second cylinder (5) having an internal thread (6) at one end and an external thread (7) at the other; a third cylinder (8) having an internal thread (9) at one end and a nozzle (10) at the other end for connection with a metal fixator. The drummer (11) has a handle (12).

The tool works as follows. In the case of a deep metal fixator in the bone marrow canal, the first cylinder 2 of the instrument body 1 is connected via an external thread 4 to the internal thread 6 of the second cylinder 5, which, in turn, is connected to the internal thread 9 of the third cylinder 8 at the end which has a nozzle 10, which is connected to the metal retainer. When the metal fixator is shallow in the bone marrow canal, the first cylinder 2 of the instrument body 1 can be connected directly to the internal thread 9 of the third cylinder 8 by means of an external thread 4. The metal fixator is extracted by moving along the body 1 of the hammer 11, which the doctor holds by the handle 12, striking him along the T-shaped strike pad 3 of the first cylinder 2.

The use of the tool is illustrated by a clinical example. Patient K., 53 years old. Diagnosis: Chronic post-traumatic osteomyelitis of the left femur, fistulous form. Consolidated fracture of the left femur. Condition after intramedullary osteosynthesis with a pin. Metal fixation migration. Under operating conditions, access to the femur was performed under spinal anesthesia. Given the migration of the metal retainer deep into the bone marrow canal, it was decided to use an instrument to remove intramedullary structures, the body of which was assembled from three cylinders. Without complications, the migrated metal fixator was quickly extracted. The postoperative period was uneventful.

The proposed tool is possible and appropriate to use in the departments of traumatology and orthopedics, as well as other surgical departments.

Information sources

1. RF patent for utility model No. 59964, “Device for extracting a hollow metal nail from a bone”, authors Prokopyev N.Ya., Prokopyev AN

2. RF patent for utility model No. 2009966 “Device for removing intraosseous pins”, authors Klinushin VS, Veroman V.Yu., Kornilov NV, Marievsky VP, Tolcheev VN, Chudinov Yu ,AT.

3. RF patent for utility model No. 13536 “Device for removing pins from long tubular bones”, author Garasyuta EG

Claims (1)

A tool for removing intramedullary structures, including a body with a shock pad and a cylindrical impactor, moved along the center of the body and centered on it, characterized in that the device body consists of three hollow metal cylinders of the same diameter, connected to each other by threaded connections, moreover, the first cylinder of the housing has a T-shaped impact pad at one end, and an external thread for connecting to the second cylinder at the other end; the second cylinder has an internal thread at one end for connection to the first cylinder, and an external thread at the other end for connection to a third cylinder; the third cylinder has an internal thread at one end for connection to a second or first cylinder, and a nozzle for connection to an intramedullary metal fixator at the opposite end; the hammer has a handle and is a hollow cylinder, the inner diameter of which exceeds the diameter of the cylinders of the tool body.

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