RU168636U1 - Device for arthroscopic dissection of the anterior cruciate ligament in patients with connective tissue dysplasia - Google Patents

Abstract

The utility model relates to medicine, namely to devices used in surgery. A device for arthroscopic dissection of the anterior cruciate ligament in patients with connective tissue dysplasia is designed to prevent restoration of the integrity of the anterior cruciate ligament after dissection during arthroscopic intervention in patients with connective tissue dysplasia. The authors propose changing arthroscopic forceps, consisting of an outer casing, a handle and an internal movable mechanism, by adding an additional crescent-shaped element having a cutting edge from the concave side, while the crescent-shaped element is movably attached to the working part of the outer casing so that it is in the idle position is a continuation of the working part of the outer case, and when you press the handle protrudes above it at least 45 ° from the main axis of the outer case, in addition, on the cutting edge crystals of artificial corundum.

4 ill.

Description

The technical field to which the utility model relates.

The utility model relates to medicine, namely to devices used in surgery.

State of the art

With a number of diseases and injuries of the knee joint, it is necessary to dissect the anterior cruciate ligament of the knee joint. Currently, dissection of the anterior cruciate ligament of the knee joint during surgery from open access is not practiced. It is generally accepted to dissect the anterior cruciate ligament of the knee joint during arthroscopy. However, in patients with connective tissue dysplasia, due to the features of the regeneration of connective tissue, it is possible to re-merge the dissected edges of the anterior cruciate ligament of the knee joint. As a result, there is a need for a second operation.

Two types of devices can be used to dissect the anterior cruciate ligament of the knee joint during arthroscopic surgery:

a) monolithic knives of various shapes,

b) tongs or nippers with a movable element.

An example of a knife is “Hook-shaped knife with a cutting edge of 90 degrees” [Source http://www.endosurgical.ru/artro_kniv/]. The disadvantage of this device is the presence of an open blade of a straight or curved shape, which can injure the surrounding tissue both at the time of insertion and at the time of dissection of the anterior cruciate ligament of the knee joint. In addition, during dissection, an incision is made with straight edges, which can lead to the restoration of the integrity of the anterior cruciate ligament of the knee joint.

As a prototype, we used the second option - "Nippers, curved to the right / left" [Source http://www.endosurgical.ru/artro_clamp/]

However, the device described above has several disadvantages.

1. Dissection of the anterior cruciate ligament of the knee joint is possible only by biting the ligament “away from you”, while the movable ligament may deviate in the direction of dissection, which may lead to partial dissection of the anterior cruciate ligament of the knee joint and its subsequent restoration.

2. During dissection, an incision is made with straight edges, which can lead to the restoration of the integrity of the anterior cruciate ligament of the knee joint.

3. The slipping of the anterior cruciate ligament of the knee joint when it is dissected may result in injury to the surrounding tissue.

Utility Model Disclosure

The authors propose a device for arthroscopic dissection of the anterior cruciate ligament in patients with connective tissue dysplasia, which is arthroscopic forceps consisting of an external casing, a handle and an internal movable mechanism, characterized in that the device is equipped with an additional crescent-shaped element having a cutting edge on the concave side, while the crescent-shaped element is movably attached to the working part of the outer casing in such a way that in the idle position it is a continuation the working part of the outer casing, and when you press the handle protrudes above it at least 45 ° from the main axis of the outer casing, in addition, artificial corundum crystals are deposited on the cutting edge of the crescent-shaped element.

The device we offer has several advantages.

1. Dissection of the anterior cruciate ligament of the knee joint is carried out by cutting the ligament "on itself", while the movable ligament is stretched and cannot deviate, the device can only be released when the anterior cruciate ligament of the knee joint is completely dissected.

2. During dissection, an incision is obtained with torn, loosened edges due to the action of artificial corundum crystals deposited on the cutting edge of the crescent-shaped element (acts as sandpaper, dispersing the dissected edges of the ligament).

3. Elimination of the anterior cruciate ligament of the knee joint during its dissection is excluded, which reduces the risk of injury to surrounding tissues.

The technical result of using the proposed device is to ensure complete dissection of the anterior cruciate ligament of the knee joint with the disengagement of its edges to prevent its recovery in patients with connective tissue dysplasia.

To characterize the utility model, in particular, the following features of the device are used:

- equipped with an additional crescent-shaped element having a cutting edge from the concave side,

- the crescent-shaped element is movably attached to the working part of the outer casing in such a way that in the idle position it is a continuation of the working part of the outer casing, and when you press the handle protrudes above it at least 45 ° from the main axis of the outer casing,

- crystals of artificial corundum are deposited on the cutting edge of the crescent-shaped element.

Brief Description of the Drawings

In FIG. 1 shows "Hook-shaped knife with a cutting edge of 90 degrees" [Source http://www.endosurgical.ru/artro_kniv/].

In FIG. 2 depicts "Curved left / right forceps" [Source http://www.endosurgical.ru/artro_clamp/].

In FIG. 3 shows a diagram (side view in section) of the proposed device in the open state (ready for dissection of the ligament):

position 1 - outer casing;

position 2 - sickle-shaped cutting element;

position 3 - crystals of artificial corundum;

position 4 - internal movable mechanism;

position 5 - handle.

In FIG. 4 shows a diagram (side view in section) of our device in the closed state (ready for insertion into the arthroscope channel):

position 1 - outer casing;

position 2 - sickle-shaped cutting element;

position 4 - internal movable mechanism;

position 5 - handle.

Utility Model Implementation

The claimed device can be applied as follows:

- the device is sterilized by the method adopted in this medical institution;

- the device is brought into the closed position (the crescent-shaped element does not protrude above the outer casing) (Fig. 4);

- the device is inserted into the joint cavity through the manipulation channel of the arthroscope;

- the device is transferred to the open state (the crescent-shaped element protrudes above the outer casing by at least 45 ° from the main axis of the outer casing (Fig. 3);

- the crescent-shaped element of the device is wound behind the anterior cruciate ligament of the knee joint;

- by moving the device back and forth or up and down, the anterior cruciate ligament of the knee joint intersects with its simultaneous release due to the action of crystals from artificial corundum;

- after complete dissection of the anterior cruciate ligament of the knee joint, the device is brought into the closed position (the crescent element does not protrude above the outer casing);

- the device is removed from the joint cavity through the arthroscope manipulation channel.

Claims (1)

A device for arthroscopic dissection of the anterior cruciate ligament in patients with connective tissue dysplasia, which is arthroscopic forceps consisting of an outer casing, a handle and an internal movable mechanism, characterized in that the device is equipped with an additional crescent-shaped element having a cutting edge on the concave side, the crescent-shaped element is movably attached to the working part of the outer casing in such a way that in the idle position it is a continuation of the working part zhnogo body and pressing on the handle protrudes above it is not less than 45 ° from the major axis of the outer shell, furthermore, on the cutting edge of the crescent-shaped member coated crystals of synthetic corundum.

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