RU2623300C2 - Endoscopic injector - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: injector is movable in the endoscope instrumental channel and consists of an external catheter, a coaxially housed internal catheter with a metal needle and a fixation device. The working end of the external catheter before its narrowing is made in the form of a self-opening umbrella with a possibility of folding when the injector is removed. The umbrella is made of a transparent material and has a diameter larger than the endoscope diameter.

EFFECT: ensuring endoscope lens protection against blood getting on it in case of jet bleeding.

3 dwg

Description

The invention relates to medicine, namely to intraluminal surgical endoscopy.

Injectors for flexible endoscopy are intended for the introduction of drugs into the mucous membrane of the digestive tract during endoscopic procedures, including for performing infiltration hemostasis. Infiltration hemostasis is the most effective and affordable of endoscopic hemostasis methods. The technique of infiltration hemostasis is simple: the needle of the endoscopic injector is injected into the bleeding zone, then the treatment solution is injected in an amount of up to 50-300 ml for complete hemostasis or a sharp decrease in bleeding intensity. Modern endoscopy involves the injection of hemostasis with simultaneous coagulation. The first reports on the use of endoscopic injectors date back to the 80s of the last century (A.M. Granov, S.K. Aiskhanov, N.A. Smirnova, V.A. Venzik. The use of oil preparations for hemostasis in gastroduodenal bleeding. - Bulletin of Surgery named after I.I. Grekov, 1986, 11, pp. 24-26; GA Valenzuella, D. McGroarty, E. Pizzani, T. Devis Jr / Endoscopic injection therapy for acute upper GI bleeding // VaMed. , 1989, Dec, 116 (12), p. 507-509), while the design of the injectors themselves remains unchanged.

Known endoscopic injector (Fig. 1), consisting of an external catheter 1 and an internal catheter 2, coaxially placed in the external catheter 1. At the working end of the inner catheter 2 is fixed a metal needle 3, and at the opposite end is a locking device 4, which serves to limit the level of movement of the inner catheter 2 relative to the outer 1. The working end of the outer catheter 1 is made tapering (Pat. 2098143 RF. Endoscopic injection needle, publ. 12/10/1997; catalog of endotherapeutic instruments from OLYMPUS, Japan, 2010, p. 62-64). The main disadvantage of this tool is the impossibility of its use in case of severe, jet bleeding, and bleeding from the fornix of the stomach, since the lens of the endoscope is instantly filled with blood. This injector is selected for the prototype.

The objective of the invention is to increase the efficiency of endoscopic hemostasis.

The technical result consists in providing protection for the endoscope lens from getting blood on it during jet bleeding.

This is achieved due to the fact that the working end of the external catheter before narrowing is made in the form of a self-expanding umbrella with the possibility of folding when removing the injector, while the umbrella is made of transparent material and has a diameter larger than the diameter of the endoscope.

A self-opening umbrella provides cover for the lens of the endoscope during jet bleeding, which instantly floods it, closing the view. The transparent material of the umbrella provides visualization of the site of bleeding, and a diameter larger than the diameter of the endoscope is necessary to prevent blood from entering the lens of the endoscope. The umbrella is made with the possibility of folding when removing the injector. The umbrella is folded under the action of traction at the distal end of the instrument channel of the endoscope.

Images explaining the essence of the invention:

FIG. 1 - endoscopic injection needle (prototype);

FIG. 2 - endoscopic injector;

FIG. 3 - performing hemostasis.

The proposed injector (Fig. 2) consists of an external catheter 1 and an internal catheter 2 coaxially placed in the external catheter 1. At the working end of the internal catheter 2, a metal needle 3 is fixed, and on the opposite, a fixation device 4 restricting the level of movement of the internal catheter relative to the external ; the working end of the external catheter 1 before its narrowing is made in the form of a self-opening umbrella 5 with the possibility of folding when removing the injector, while the umbrella is made of transparent material and has a diameter larger than the diameter of the endoscope.

The injector is used as follows: the umbrella (Fig. 3) is manually folded in front of the working end of the instrument, the injector is inserted into the instrument channel of the endoscope, passed through it into the lumen of the organ under investigation, where the umbrella is self-opening, and after hemostasis, the injector is folded out at the distal end of the instrument channel.

Claims (1)

An injector made with the possibility of moving in the instrument channel of the endoscope and consisting of an external catheter, an internal catheter coaxially placed in it with a metal needle and a fixation device, characterized in that the working end of the external catheter before it is narrowed is made in the form of a self-expanding umbrella with the possibility of folding when removed injector, while the umbrella is made of transparent material and has a diameter larger than the diameter of the endoscope.

Images