RU2553499C2 - Device for fixation of external endoscope catheter - Google Patents

Abstract

FIELD: medicine.

SUBSTANCE: invention relates to medicine and can be applied for the fixation of an external endoscope catheter. Fastening elements are made in the form of two mechanically conjugated semi-rings, facing opposite sides, the internal diameter of which corresponds to the external diameter of the catheter and the external diameter of the endoscope, the width of the smaller ring constitutes 2-6 catheter diameters, and the width of the larger ring constitutes 1-4 endoscope diameter(s).

EFFECT: device makes it possible to increase exploitation reliability.

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Description

The invention relates to medicine, namely to devices for fixing an external endoscope catheter.

A known endoscope containing a housing made in the form of a working part, a hollow flexible tube, separated inlet and outlet channels and placed hermetically in the outlet channel (1 - RF patent 2014095, A61M 9/00, 1990). This device is taken as an analog.

Closest to the proposed device is an extractor for extracting stones from the ureters (2 - RF patent 2221504, 2002), containing a flexible probe with a basket-trap with capture elements - prototype. A flexible probe is placed in a tubular guide and ends with a guide-conductor with an olive at the end. The trap basket is located in the part of the probe, which is displayed on the outer side surface of the tubular guide through the hole. The tubular guide is provided with drainage holes evenly spaced along the entire length.

However, the prototype device is relatively difficult to disassemble, and its reliability is limited, since the probe is often deformed at the point of transition from the connecting connector to the working part, its outer shell cracks and breaks. This reduces the therapeutic effect of the procedures and the operational reliability of the device.

The aim of the invention is to increase the effectiveness of therapeutic effects while increasing the operational reliability of an external catheter.

The technical result is achieved by the fact that the fastening elements are made in the form of two mechanically conjugated half rings facing in opposite directions, the inner diameter of which corresponds to the outer diameter of the catheter and the outer diameter of the endoscope, the width of the smaller ring being 2-6 of the diameter of the catheter, and the width of the larger ring is 1 -4 diameters of the endoscope, and the free ends of the half rings are equipped with spring elements.

An endoscope with a fixed catheter (probe, other executive organ) is assembled as follows (Fig. 1, 2). A device for fixing an external catheter is put on with a half-ring 1 of larger diameter on the body of the endoscope 2 and placed at a distance of 5-10 cm from the proximal end of the endoscope. Then an additional catheter 3 is inserted inside the half ring 4 of smaller diameter. The half rings 1 and 4 are equipped with spring elements. The main mechanical load on the device fixing the catheter falls on a half-ring of a larger diameter, placed on the body 2 of the endoscope, another half-ring holds the catheter 3 near the body 2 of the endoscope. Due to the fact that the width of the smaller ring is 2-6 of the diameter of the catheter, and the width of the larger ring is 1-4 of the diameter of the endoscope, the catheter 3 retains its flexibility and at the same time is protected from excessive deformation leading to its breakage. If necessary, 2-3 or more devices can be installed sequentially on endoscope 2 for fixing an additional catheter 3. This can further improve the operational reliability of the catheter assembly with the endoscope. This fixation device allows a quick change of a used catheter with a new one or replacement of a catheter with another instrument additional to the endoscope. Element 4 can be made in the form of a semicircle with spring-loaded ends 5 (Fig. 1) or a complete ring conjugated with element 1 (Fig. 2).

The device operates as follows.

In patients, endoscopically detect arrozed vessels, polyps, bleeding ulcers. For additional manipulations, biopsy forceps, coagulators, extractors, catheters for manometry, chromoscopy are attached to the external surface of the endoscope using a fixation device, thereby converting a standard diagnostic endoscope into two (or more) surgical ones.

A device for fixing an external catheter is put on with a half-ring 1 of larger diameter on the body of the endoscope 2 and placed at a distance of 5-10 cm from the proximal end of the endoscope. Then an additional catheter 3 is inserted inside the half ring 4 of smaller diameter. The main mechanical load on the device fixing the catheter falls on a half-ring of a larger diameter, placed on the body 2 of the endoscope, another half-ring holds the catheter 3 near the body 2 of the endoscope. Due to the fact that the width of the smaller ring is 2-6 of the diameter of the catheter, and the width of the larger ring is 1-4 of the diameter of the endoscope, the catheter 3 retains its flexibility and at the same time is protected from excessive deformation leading to its breakage.

Example 1

Patient N., 39 years old, was admitted with complaints of pain in the epigastric region, increasing at night. An endoscopic examination revealed an ulcer of the antrum and arrosion of the vessel of the edge of the ulcer with bleeding. For simultaneous argon plasma coagulation, an external probe is attached to the endoscope.

The device for fixing the external catheter (probe) is two mechanically conjugated half rings facing in opposite directions, the inner diameter of which corresponds to the outer diameter of the catheter and the outer diameter of the endoscope, the width of the smaller ring being 2 diameters of the catheter and the width of the larger ring being 1 diameter of the endoscope, moreover, the free ends of the half rings are equipped with spring elements (Fig. 1).

The device for fixing the external probe is put on with a half-ring 1 of larger diameter on the body of the endoscope 2 and placed at a distance of 5 cm from the proximal end of the endoscope. Then an additional probe 3 is inserted inside the half ring 4 of smaller diameter. The main mechanical load on the device fixing the probe falls on a half-ring of a larger diameter, placed on the body 2 of the endoscope, another half-ring holds the probe 3 near the body 2 of the endoscope. Due to the fact that the width of the smaller ring is two diameters of the catheter, and the width of the larger ring is equal to the diameter of the endoscope, probe 3 retains its flexibility and is at the same time protected from excessive deformation leading to its breakdown. The supply of the ends of the semicircles 1 and 4 with spring-loaded elements increases the reliability of fixing the probe on the endoscope body.

The probe is a Teflon tube with a ceramic tip that contains an electrode. The generator allows you to set the argon feed rate from 0.9 l / min. Power from 60 watts. After the system is activated, a simultaneous supply of gas and electric voltage occurs, which makes argon ionized. The plasma flow is directed to the most closely located areas, which allows coagulation to be performed tangentially with respect to the wall of the hollow organ. The coagulation zone in this case is from 1.5 mm. Duration of exposure 2 sec. Coagulation without direct contact of the electrode with tissues without appropriate adhesion, as well as the shallow depth of thermal damage to the tissue indicates the advantages of the argon plasma coagulation method. Repeated endoscopic examination revealed successful coagulation. An analysis of feces for occult blood for three days is negative, the level of hemoglobin increased during the same period. The conclusion is made about the reliable fixation of the probe to the endoscope body during argon plasma coagulation.

Example 2

Patient I., 47 years old, was admitted with complaints of hunger pain in the right hypochondrium. An endoscopic examination revealed a bleeding ulcer of the bulbar part of the duodenum. For simultaneous electrocoagulation, an external probe is attached to the endoscope.

The device for fixing the external catheter (probe) is two mechanically conjugated half rings facing one side, the inner diameter of which corresponds to the outer diameter of the catheter and the outer diameter of the endoscope, the width of the smaller ring being 6 diameters of the catheter and the width of the larger ring being 4 diameters of the endoscope, moreover, the free ends of the large half-ring are equipped with spring elements (Fig. 2).

A device for fixing the external actuator is put on with a half-ring 1 of larger diameter on the body of the endoscope 2 and placed at a distance of 10 cm from the proximal end of the endoscope. Then an additional catheter 3 is inserted inside the half ring 4 of smaller diameter. The main mechanical load on the device fixing the catheter falls on a half-ring of a larger diameter, placed on the body 2 of the endoscope, another half-ring holds the catheter 3 near the body 2 of the endoscope. Due to the fact that the width of the smaller ring is 6 diameters of the catheter, and the width of the larger ring is 4 diameters of the endoscope, the catheter 3 retains its flexibility and at the same time is protected from excessive deformation, leading to its breakage.

The patient underwent endoscopic electrocoagulation using an external probe. Bleeding is stopped. The patient was prescribed conservative therapy that improves blood coagulation. An analysis of feces for occult blood for three days is negative. Repeated endoscopic examination, conducted a week later, revealed successful coagulation. The hemoglobin level increased during the same period. It is concluded that the probe is securely fixed to the endoscope body during electrocoagulation.

Example 3

Patient K., 42 years old, was admitted with complaints of a feeling of nausea and loss of appetite. An endoscopic examination revealed two polyps in the antrum of the stomach measuring 1.5 × 0.7 cm and 1.2 × 0.5 cm on a thick base. For simultaneous electrocoagulation, an external catheter with an instrument for electroexcision of polyps is attached to the endoscope.

The device for fixing the external catheter is two mechanically conjugated half rings facing one side, the inner diameter of which corresponds to the outer diameter of the catheter and the outer diameter of the endoscope, the width of the smaller ring being 5 diameters of the catheter and the width of the larger ring being three diameters of the endoscope, with free ends the large half rings are equipped with spring elements (Fig. 2).

The device for fixing the catheter is put on a half-ring 1 of a larger diameter on the body of the endoscope 2 and placed at a distance of 8 cm from the proximal end of the endoscope. Then an additional catheter 3 is inserted inside the half ring 4 of smaller diameter. The main mechanical load on the device fixing the catheter falls on a half-ring of a larger diameter, placed on the body 2 of the endoscope, another half-ring holds the catheter 3 near the body 2 of the endoscope. Due to the fact that the width of the smaller ring is 5 diameters of the catheter, and the width of the larger ring is three diameters of the endoscope, the catheter 3 retains its flexibility and at the same time is protected from excessive deformation leading to its breakage.

The patient underwent endoscopic electroexcision using an external catheter. Bleeding is stopped. The patient was prescribed conservative therapy that improves blood coagulation. An analysis of feces for occult blood for three days is negative. Repeated endoscopic examination, conducted a week later, revealed the successful conduct of electroexcision. The hemoglobin level increased during the same period. It is concluded that the catheter is securely fixed to the endoscope body during electroexcision.

Information sources

1. RF patent 2014095, A61M 9/00, 1990.

2. RF patent 2221504, 2002.

Claims (1)

A device for fixing an external endoscope catheter containing fastening elements, characterized in that the fastening elements are made in the form of two mechanically conjugated half rings facing in opposite directions, the inner diameter of which corresponds to the outer diameter of the catheter and the outer diameter of the endoscope, the width of the smaller ring being 2-6 the diameter of the catheter, and the width of the larger ring is 1-4 of the diameter of the endoscope.

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