RU185917U1 - REMOVABLE Y-DRAINAGE DEVICE - Google Patents

Abstract

A priority utility model has been developed - a removable Y-shaped drainage device containing a two-channel tubular casing, divided into two branches, characterized in that it is equipped with a flexible monoactive electrode located inside the tubular casing, each channel of which is connected to the corresponding branch of the casing and equipped with a wick hydrophilic thread with an atraumatic needle at the free end, while the free end of the thread is in direct contact with the electrode channel, and the other end of each thread is rigidly connected tsya fixation by tying knots at ushkoobraznom protrusion with a hole in the wall of each branch unit. The principal difference of the proposed device is that the Y-shape of the branches and the body of the removable drainage device is used, at the inner ends of the branches of which an ear-shaped protrusion is created with a hole in the center. These features of the device allow optimizing its non-invasiveness, simplify manufacturing and create a wide selection of suture material used in the device. The removable Y-shaped drainage device was successfully tested in 20 bench experiments and 14 animal experiments.

Description

The proposed utility model relates to medical equipment, namely to devices used in surgery, and is intended for drainage of hollow organs and narrow cavities.

The following device is known: drainage T-shaped device [1] The prototype has the following disadvantages:

a) The branches of the drainage T-shaped device extend from the tubular body at a right angle of -90 °. When removing such a drainage device, lateral pressure of the branches occurs on the tissue of the drainage canal and at this moment the wound canal created, for example, in the chest wall during the operative installation of the drainage is injured. Removing such drainage causes pain and bleeding resulting from the removal of the T-shaped drainage device.

b) At the inner ends of the drainage T-shaped device there are hydrophobic or hydrophilic wick filaments that have active ends equipped with atraumatic needles and passive ends that are rigidly fixed to the internal branches of the drainage T-shaped device, for example, soldered into the walls of the internal branches of the housing. This type of fixation is technically difficult to accomplish and does not allow the use of selectively suture wick hydrophobic or hydrophilic material during the operation.

The tasks to which the claimed technical solutions are directed are to optimize non-invasiveness, simplify manufacturing, and make a wide choice of applicability of suture material for a removable Y-shaped drainage device.

These tasks are solved due to the fact that

1) The Y-shape of the branches and body of the removable Y-shaped drainage device is used;

2) At the ends of the internal branches of the removable Y-shaped drainage device, an ear-shaped protrusion is created, with a hole in the center, in the wall of each branch.

A removable Y-shaped drainage device is illustrated in FIG. 1. It consists of a two-channel, tubular Y-shaped body 1, which is bifurcated to give it a Y-shape into two branches 2, 3 and is made, for example, of silicone rubber. The branches bifurcate at an obtuse angle, for example 135 ° with respect to the longitudinal axis of the housing 1. Each of the bifurcated branches of the tubular housing 2, 3 has a fixation device consisting of channels 4, 5 of the electrode 10, active 6 and passive 7 ends of the threads. Each bifurcated channel 4, 5 of the electrode 10 is located in the lumen of the corresponding branches 2, 3 of the two-channel tubular Y-shaped body 1, in the wall of which is placed a flexible monoactive electrode 10, made, for example, of a silver-plated stranded copper wire whose channels are directly in contact with wick hydrophilic threads that have active ends 6, equipped with atraumatic needles 8 and passive ends 7, which are rigidly fixed to the branches 2, 3 of a two-channel, tubular Y-shaped body 1 removable for enazhnogo fixation device by tying knots at ushkoobraznom protrusion with a central hole 9 in the wall of each branch 2 and 3 (FIG. 2)

Wick hydrophilic threads with atraumatic needles are made separately and used in the form of sets of different diameters or types of threads. The holding and fixing of threads to the ends of the branches of the device is shown in FIG. 2. and can be performed before surgery.

The device is used as follows [Fig. 3]. After the end of the surgical intervention on the organs of the chest cavity, a removable Y-shaped drainage device is introduced into the pleural cavity from the side of the surgical access. Through a separate section of all layers of the chest wall 15, from the inside of the pleural cavity 14, a two-channel tubular Y-shaped body 1 of a removable drainage device containing a flexible monoactive electrode 10 is brought out onto the skin surface 12.

In the pleural cavity, branches 2, 3 of the two-channel tubular Y-shaped body 1, together with the channels 4, 5 of the electrode 10, are each parted in their respective directions, one, 2, 4 - to the dome, the other 3, 5 - to the diaphragmatic sinus of the pleural cavity 16. Then, branches 2, 3 of a two-channel, tubular removable Y-shaped body are fixed in the lumen of the pleural cavity 14 with an atraumatic needle and thread by stitching the costal pleura and adjacent tissues. Active 6 and passive 7 ends of the threads are fixed by surgical nodes 8, located as close as possible to the branches 2 and 3 of the housing 1, and are cut short (Fig. 3).

The postoperative wound is sutured tightly. Through the gaps of the branches 2, 3 of the two-channel, tubular Y-shaped body of the removable drainage device, the contents are drained from the pleural cavity 14. After the drainage is completed, the passive electrode 13 from the apparatus for high-frequency surgery, for example, type EN-57N, is placed on the patient’s skin 12 and flexible monoactive electrode 10, previously freed from the insulating shell of the housing, join the monoactive electrode of the apparatus for high-frequency surgery and pass the high-frequency discharge.

As a result of the wetting of the filaments with tissue fluid and an electric discharge on the channels 4, 5 of the flexible monoactive electrode 10, the active ends of the filaments 6, which are in direct contact with the channels 4, 5 of the monoactive electrode 10, instantly burn out. Burnout occurs inside branches 2 and 3 of the two-channel, tubular Y-shaped case 1 of a removable drainage device, and the burn-out time is so short that it does not allow to damage the walls of branches 2 and 3 of case 1, surrounding tissue 15, lung 11, and the device, together with active 6 and passive 7 con threads that are fixed on the branches 2 and 3 of the two-channel, tubular Y-shaped body 1 of the removable drainage device by tying the fixing knots on the ear-shaped protrusion with a hole in the center 9, in the wall of each branch 2 and 3. (Fig. 2), is atraumatically removed from the pleural cavity.

The thickness of the monoactive electrode is selected empirically and is equal to the thickness of the applied ligature. The experimentally selected voltage of the high-frequency current required to burn the threads, and it corresponds to division 6 of the rheostat of the apparatus EN-57N for high-frequency surgery. The fundamental difference between the proposed device and the known one is that in order to reduce the trauma of removing the device, its branches are Y-shaped forks at an obtuse angle, for example 135 °, with respect to the longitudinal axis of the housing, and also, in order to simplify the manufacturing, wide of choice of suture material used at the ends of the inner branches of the removable Y-shaped drainage device, an ear-shaped protrusion is created, with a hole in the center, in the wall of each branch

Bench tests of the proposed two-channel, tubular removable Y-shaped drainage devices (20 pcs.) Were carried out: a dummy made of foam rubber was placed on the passive electrode of the EN-57N high-frequency surgery apparatus, the proposed devices were fixed to the dummy and covered with a second layer of foam rubber, which was sewn to the lower layer . All foam was impregnated with a 0.9% sodium chloride solution, and the active electrode of the high-frequency surgery apparatus was connected to a flexible monoactive electrode of the drainage device. As a result of the wetting of the filaments and the high-frequency discharge, the filaments fixing the branches of a removable Y-shaped drainage device burned out, and the device itself was removed from the foam rubber and microscopic under a magnifying glass MBS-9.

In all cases, removable Y-shaped drainage devices were completely removed, the drainage housing was not damaged, and the fixing ligatures remained on the device. The results of bench experiments using various types and sizes of suture material are presented in the table.

2 series of experiments were conducted on 14 rabbits. All animals on the back had a skin incision in the paravertebral zone, a pocket was formed, on the bottom of which they were laid and hemmed, in the first series of experiments, 7 animals, a removable Y-shaped drainage device, and, in the second series of experiments, 7 animals, a T-drainage shaped device. The branches of all drainage devices were fixed at opposite ends of the formed pocket. The wound was sutured in layers tightly, and the two-channel tubular body of a removable Y-shaped drainage device or a T-shaped drainage device was brought to the surface. After a two-day exposure, devices from animals were removed by connecting a monoactive electrode from a device for high-frequency surgery to a flexible monoactive electrode, and a passive electrode of a device for high-frequency surgery was connected to the rabbit's skin, after it was abundantly wetted with tap water. After the fixing threads burned out, all the devices were removed atraumatically, at exactly the specified time. In the first series of experiments, from the channel of the wall of the pocket in which the removable Y-shaped device was located, the blood flowed liquid was released for 3-5 minutes, then the release of the blood flowed liquid stopped on its own. In the second series of experiments, in all cases from the channels of the wall of the pocket in which the drainage T-shaped device was located, after its removal bleeding developed, which in rabbits required clamping of the channel for 20-30 minutes, in 3 rabbits, to stop the bleeding, it was necessary to flush the channel single seam.

The source of information

1. Samsonov V.P., Tyurikov P.P., Zavarzina E.V. Drain T-shaped device. Patent for invention No. 2211053. Discoveries and inventions, 2003, No. 24.

Claims (1)

A removable Y-shaped drainage device containing a two-channel tubular casing, divided into two branches, characterized in that it is equipped with a Y-shaped flexible monoactive electrode located inside the tubular casing, each channel of which is connected to the corresponding branch of the casing and equipped with a wick hydrophilic thread with atraumatic needle at the free end, while the free end of the thread is in direct contact with the channel of the electrode, and the other end of each thread is rigidly connected by tying the fixation nodes on ushkoobraznom protrusion with a hole in the center, the wall of each branch unit.

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