RU2347533C1 - Device for collection of diagnostic material - Google Patents

Abstract

FIELD: medical equipment.

SUBSTANCE: device comprises conductor with flexible distal end arranged as hollow. Stem is installed inside conductor. End of stem installed inside conductor is rigidly connected to distal end. External end of stem is connected with handle. Slits are arranged at distal end to arrange long strips. Strips are bent whenever stem extends from conductor. Clearances for collection of biological material are created between strips. Conductor is equipped by limiter installed on conductor surface.

EFFECT: validity of microscopic examination performance.

3 dwg

Description

The invention relates to medicine, in particular to devices when performing a biopsy, and can be used, for example, in gynecology to excise pieces of tissue from the walls of the uterine cavity with the aim of conducting diagnostic studies to determine the precancerous and cancerous state, including endometrial cancer.

A device for collecting diagnostic material is known, comprising a hollow conductor with an elastic working end provided with holes for collecting biological material; a piston fixed to the rod is placed inside the conductor ("Intrauterine suction curette" of the company "Medscand", Sweden).

A disadvantage of the known design is that this device does not allow to excise pieces of tissue from the walls of the uterine cavity due to the fact that the elements for collecting biological material are made of easily absorbed material, as a result of which the material is removed only from the surface of the uterine walls, which reduces the reliability of microscopic studies.

Closest to the claimed technical solution is a device for collecting diagnostic material containing a hollow conductor with a flexible distal end, a rod placed inside the conductor, equipped with a handle, a depth gauge for introducing the conductor into the uterine cavity (patent RU No. 2250078 C1, IPC АВВ 10/00, published on April 20, 2005).

A disadvantage of the known design is that this device does not allow to excise pieces of tissue from the walls of the uterine cavity due to the fact that the elements for collecting biological material are made in the form of a flexible elastic structure (brush, brush, bundle of loop-like threads, etc.) As a result, the reliability of microscopic studies is reduced.

The technical result of the invention is the collection of diagnostic material by excising pieces of tissue from the surface of the walls of the uterus with the aim of reliability of microscopic studies.

This object is achieved in that in the device for collecting diagnostic material containing a hollow conductor with a flexible distal end, a rod placed inside the conductor, equipped with a handle, a depth gauge for introducing the conductor into the uterine cavity, the stem end is rigidly connected to the flexible distal end of the conductor, on which cuts are made, forming longitudinal strips with the possibility of their bending and the formation of gaps between them to collect diagnostic material when the rod is extended from the conductor.

Performing longitudinal cuts at the distal end of the conductor leads to the formation of separate strips fixed from the ends, which, when the rod extends from the conductor, bend, take an arcuate shape, resulting in gaps between them. The edges of the strips during rotation of the conductor act as scrapers and excise pieces of tissue from the walls of the uterus in the amount necessary for the reliability of microscopic studies. Due to the flexibility of the distal end of the conductor, the collection of biological material is painless, which eliminates trauma to the uterine cavity.

A rigid connection of the rod end to the flexible distal end of the conductor leads to bending of the strips when the rod extends from the conductor and the formation of gaps between them, as a result of which it is possible to collect biological material on the inner surface of the strips.

The invention is illustrated by drawings, where

figure 1 presents a General view of the described device;

figure 2 shows the device in working condition with the extended stem and curved strips of the distal end, a longitudinal section;

figure 3 is a section aa in figure 2, the distal end with diluted strips.

A device for collecting diagnostic material contains a hollow conductor 1, equipped with a flexible distal end 2 (figure 1). A rod 3 is located inside the conductor. The end face of the distal end 2 is rigidly connected to the end of the rod 3 (FIG. 2). The outer end of the rod 3 is connected to the handle 4. At the distal end 2 of the conductor 1, longitudinal cuts are made with the formation of individual strips 5, fixed from the ends. The number of cuts can be different, in the example, four cuts are made (figure 3). The conductor is equipped with a limiter 6 in the form of a ring placed on the surface of the conductor 1. The limiter 6 provides the introduction of the conductor 1 into the uterine cavity by the required amount to prevent injury to the uterus.

The device operates as follows.

To take the biological material, the conductor 1 is inserted into the uterus to the limiter 6. Holding the conductor 1, the rod 3 is led out of the conductor 1 by the handle 4. Due to the fact that the distal end 2 is rigidly connected to the end of the rod 3, the strips 5 are bent, depart from the rod 3 to the sides and take an arcuate shape (figure 2), and the distal end 2 is an egg-shaped. Between the strips 5 gaps are formed (figure 3). The conductor 1 with the distal end 2 of the handle 4 is given a rotation of about 3-4 revolutions. During the rotation of the edges of the strips 5, the tissue pieces are excised from the walls of the uterine cavity. The collected biological material is held on the inner surface of the strips 5. Then the rod 3 is moved in the opposite direction, which helps to return the strips 5 to its original position and close the gaps. Next, the conductor 1 with biological material is removed from the uterine cavity and sent for diagnostic tests.

Thus, the design of the proposed device is simple to manufacture and use, provides a biopsy by excising pieces of tissue from the walls of the uterine cavity in the right amount for the reliability and accuracy of biological research.

Claims (1)

A device for collecting diagnostic material containing a hollow conductor with a distal end, a rod placed inside the conductor, equipped with a handle, a depth gauge for introducing the conductor into the uterine cavity, characterized in that the end of the rod is rigidly connected to the distal end of the conductor, on which longitudinal sections are made to form strips with the possibility of bending and the formation of gaps between them when the rod is extended from the conductor, as well as tissue excision during rotation of the conductor, collection of diagnostic material and return at the initial position when moving the rod in the opposite direction.

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