SU140951A1 - Excavator Forceps for Biopsy with Closed Laryngeal Tumors - Google Patents

Description

Carrying out an endolaryngological biopsy with known instruments when the larynx tumor is closed, has a broad base, a smooth surface, a dense consistency and is located in inaccessible parts of the larynx and larynx-pharynx is usually difficult or not at all possible, since the tool slides on a smooth, even the surface of the tumor, not having protrusions. Sometimes the tool captures only the surface layer of the mucous membrane, which sometimes leads to a diagnostic error.

The proposed tool, an excavator forceps, is equipped with an excavator tip with four simultaneously converging along two mutually perpendicular planes when they are inserted into the fabric.

Such an embodiment of the instrument allows biopsy on smooth, even surfaces.

To ensure the simultaneous alignment of all four knives of the excavator tip along two mutually perpendicular planes, the knives are hingedly connected with the tip body and the pusher moving inside the housing.

FIG. 1 shows the proposed excavator forceps in general; in fig. 2 shows the design of the tip in a section. The tool comprises a flat handle / with a lever-trigger 2 and a bent tube 5 with a pull 4, at the end of which there is a tip 5 with knives 6.

The proximal end of the gi 4 ends with a ball, which slides freely in the groove of the lever-trigger 2. The latter is pivotally connected to the handle; with the help of a plate retainer 7, which simultaneously presses the bent tube 3 to the upper part of the handle U at the distal ends of the rod 4 and the tubes 3 are threaded with one step

No. 140951- 2 On the tube 4 and the tube 3 the tip 5 is screwed on. The position of the tip 5 relative to the axis of the tube 3 is fixed by a lock nut 8.

The design of the tip 5 is made as follows (Fig. 2). Inside the tip body 5, screwed onto the tube 3, there is a pusher 9, which is screwed onto the sleeve 4. Four knives 6 are articulated with the body of the tip 5 and the pusher 9, which are mounted along mutually perpendicular planes.

When the trigger lever 2 is pressed, the distal end of the pull 4 moving inside the tube 3 somewhat extends from the latter and acts on the push rod 9. When moving the push rod 9 downward, each of the axes 10 rigidly connected to the push rod 9 slides in the groove of the corresponding knife . The latter at the same time rotate about their axes //, and the cutting edges (blades) of knives converge mutually perpendicular planes with each other oo. With the help of spring 12, the trigger lever 2 and, consequently, the pull 4 also returns B to the original position.

The Central Institute for the Advancement of Doctors of the USSR Ministry of Public Health (clinic for diseases of the ear, nose and throat) and the city hospital No. 40 (Moscow), where the instrument was officially tested, noted the usefulness of the proposed excavator forceps.

Subject invention

Claims (2)

1. Forceps-excavator for biopsy with closed laryngeal tumors, made in the form of a handle with a lever-trigger and a bent tube with a pull, characterized in that, in order to perform a biopsy on smooth, level surfaces, the tool is equipped with a four-excavator tip at the same time knives converging in two mutually perpendicular planes when they are inserted into the tissue. 2. An excavator forceps for biopsy with closed laryngeal tumors according to claim 1, characterized in that, in order to ensure the simultaneous alignment of all four knives of the excavator tip in two mutually perpendicular planes, the knives are jointly connected to the tip body and pusher moved inside the housing.