RU173622U1 - DEVICE FOR DETERMINING THE STRENGTH OF SEAMS OF THE ESOPHAGUS IN THE EXPERIMENT - Google Patents

Abstract

The utility model relates to medicine, namely to experimental surgery. The device includes a pressure gauge, syringe and catheter, at the distal sealed end of which a balloon is attached, connected using a tee and fitting into a single closed system. The device allows to inflate the balloon inserted into the excised esophagus so that the projection of the balloon is at the level of the sutures placed on the gap of the esophagus and, using a pressure gauge, record the pressure sufficient to rupture the joints.

Description

The utility model relates to medicine, namely to experimental surgery.

A device is known for measuring the tensile strength of a postoperative scar in an experiment (Pat. PM RU 105824 of 09/01/2010). The device consists of laboratory racks, clamps, a fragment of biological tissue, attachment slings, graduated containers with water or another liquid of known density, connecting tubes with a shut-off valve. The principle of operation is to determine the volume of fluid that led to tissue rupture and to quantify the exact amount of force required to rupture biological tissue using the formula F = m · g, where m is the weight of the load leading to tissue rupture, g is the force of gravity .

The disadvantages of the device - the working surface of the clamps injures the tissue, it is impossible to use such a device to determine the strength of the postoperative scar on the esophagus, since its tissues have less strength than the skin tissue.

The urological Foley catheter is known (operative urology: guidance / edited by N.A. Lopatkin, I.P. Shevtsov: Medicine, 1986. - 220 p.), Which has a tube, at the end of which a balloon is fixed. The length of the catheter is from 280 to 360 mm, the diameter is more than 4.7 mm and the volume of the balloon is from 1.5 ml (cm ³ ) to 30 (ml / cm ³ ), which does not allow it to be used for manipulating the esophagus of experimental animals, which are much smaller length and cross section.

The Fogarty catheter is known (medical products, found on the Internet http://medams.ru/kateter-polimernyy-dlya-embolektomii-i-trombektomii). It has a tube with a diameter of one to 2.7 mm, ends blindly with a soft atraumatic tip. At the end of the tube there is a balloon made of latex, additionally fixed with silk thread. The proximal catheter is connected via a Luer connector to a syringe.

However, the device is not suitable for estimating the pressure inside the catheter and balloon.

Both of the above catheters do not allow an assessment of the tension required to break the seams of the esophagus after restoring its integrity in the experiment.

The technical result is a quantitative assessment of the strength of the joints of the esophagus after restoring its integrity in the experiment, ease of manufacture and low cost of the device.

The device includes a manometer (1), a rubber tube (2), a tee (3), a syringe (4), a fitting (5), a catheter (6) having a sealed distal end (9), a balloon (7), and cylinder attachment threads ( 8).

To create the device, a manometer (1) from a mechanical tonometer was used. The catheter (6) was taken from the system for intravenous infusion of infusion solutions, the length is not more than 150 mm, diameter up to 7 mm (medical infusion system products, found on the Internet http://medkim.ru/sistemy-infuzionnye-i- transfuzionny).

The distal end (9) of the catheter (6) is sealed. At a distance of 2-3 cm from the sealed end, one hole is made in the catheter (6) for air to enter the balloon (7). The cylinder (7) is made of natural high-quality latex, for example, from a product under registration certificate: FSZ 2010/07025 from 08/08/2014 by cutting sleeves from 2.5 to 4 cm long from the middle part of the product. The middle of the cut sleeve is combined with a hole done in the catheter (6) and fastened with glue and threads (8) to the catheter (6), departing 0.2-0.3 cm from the edge of the sleeve. Thus, a balloon (7) is obtained. From the distally located threads (8) that fix the balloon (7) to the sealed distal end (9), about one centimeter of free space remains on the catheter (6) to secure the distal esophagus (12).

A tee (3) is attached to the proximal end of the catheter (6), connected to a syringe (4) and a rubber tube (2). The other end of the rubber tube (2) is connected to a pressure gauge (1).

The device operates as follows.

After modeling Burhave syndrome, a torn esophagus is sutured with traumatic suture materials. The seam (13) is imposed, departing from the edge of the gap 1 mm, the distance between the seams 3 mm. The proximal (11) and distal (12) sections of the esophagus are excised. In the direction from the proximal (11) to the distal (12) sections, a catheter (7) is inserted into the excised esophagus. The balloon (6) should be positioned so that its projection (14) is under the sutures (13), superimposed on the site of rupture of the esophagus.

The distal (12) section of the esophagus is fixed with ligatures (10) to the catheter (6) at the sealed distal end (9). The proximal (11) section of the esophagus is fixed with ligatures (10) to the catheter (6) above the excision site.

A syringe (4) injects air into the device, the flows of which through the tee (3) enter the pressure gauge (1) and the catheter (6). Through the hole in the catheter (b), air enters the balloon (7) inflating it. During the air supply, the pressure on the manometer (1) is constantly monitored, the pressure value is fixed at the time of seam rupture of the esophagus (13). Then the air is evacuated from the system using a syringe (4), after which the ligatures (10) securing the proximal (11) and distal (12) esophagus to the catheter (6), the device is removed.

Thus, the developed device can be manufactured with minimal time and material resources, while obtaining the ability to accurately quantify the effort required to assess the strength of the sutures placed on the esophagus when modeling the Burhave syndrome.

FIG. 1. General view of the device

1. pressure gauge

2. rubber tube

3. tee

4. syringe

5. fitting

6. catheter

7. cylinder

8. cylinder mount threads

9. sealed distal end of the catheter

FIG. 2. Preparation of the experiment to determine the strength of the joints - dissected esophagus with a catheter inserted

6. Catheter

10. ligatures for attaching the esophagus to the catheter

11. proximal esophagus

12. distal esophagus

13. sutures placed on the gap of the esophagus

14. projection of the location of the balloon attached to the catheter, immersed in the esophagus

Claims (1)

A device for evaluating the tensile strength of the esophagus sutures in an experiment, including a catheter inserted into the esophagus, the distal end of which is sealed and a latex balloon, pressure gauge and syringe are fixed to this end, while the pressure gauge is connected to the syringe and catheter using a tee and tubes, and the syringe is connected to the tee with the possibility of pumping and evacuating air from the device, and at a distance of 2-3 cm from the sealed distal end, a hole was made in the catheter for supplying air to the balloon.

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