RU2765916C1 - Double-lumen injector-nozzle drainage tube with screw fixation - Google Patents

Abstract

FIELD: medical equipment.

SUBSTANCE: invention relates to medical equipment, namely to double-lumen drainage apparatuses primarily for drainage of purulent cavities: abscess, phlegmon, and is also suitable for drainage of pleural and abdominal cavities. The double-lumen injector-nozzle drainage tube is made in the form of a screw and consists of an external tube with a thread, located between the turns whereof are drainage holes, and an internal tube with four nozzle-type injectors at the top. The proximal section of the drainage tube is equipped with two holes: the central hole - also referred to as the proximal hole of the central canal - and the peripheral hole.

EFFECT: invention is characterised by high efficiency of irrigation of the drained cavity or wound with an antiseptic, allows for a reduction in the time of sanitation and improvement in the cosmetic effect due to the increased mobility of the drainage tube inside the cavity and the absence of additional fixation to the tissues, facilitation of drainage of the cavity, removal of the drainage tube for maintenance and replacement with a drainage tube of another caliber.

1 cl, 2 dwg

Description

SUBSTANCE: invention relates to medical equipment, namely to drainage devices mainly for drainage of purulent cavities: abscess, phlegmon, and is also suitable for drainage of pleural and abdominal cavities.

Drainage of wounds and body cavities in the postoperative period is a widely used method to prevent purulent-septic complications. Drainage allows you to ensure the outflow of exudate and speed up the healing process. In addition, drainage allows for antibacterial treatment of the cavity or wound and the introduction of drugs into it.

In medical practice, a large number of surgical drains are used: tampon drains (RF Patent 2516076, IPC A61M 27/00), Penrose drainage, one-, two- and multi-lumen drains, etc. The materials from which they are made are also diverse: capillary dressings , rubber, polymer films made of acetate, cellulose, polyethylene, silicone, PVC, plexiglass, glass and metal drains.

However, none of these drains fully meets the modern requirements for them: biocompatibility of the material used, ease of installation and minimal trauma to surrounding tissues, drainage functions for a long time.

A well-known device for drainage of the abdominal cavity, which is a perforated elastic tube [Borisov A.E. (ed.) Videoendoscopic interventions on the organs of the abdomen, chest and retroperitoneal space. - St. Petersburg: EFA Enterprise, Janus. - 2002. - S. 58-60]. The technical complexity of installing and fixing such a drainage device in the cavity is due to the plasticity of the material. Due to the impossibility of maintaining the given position of the drainage device, additional attachment to the tissues is required, the introduction of solutions into the cavity becomes more difficult, as well as the outflow and aspiration of its contents.

Known drainage device, which is a tube with drainage holes at the end. Inside the tube passes an additional pipeline for supplying a flushing agent [Patent CN 201618293, IPC A61M 27/00]. The main disadvantage of such a drainage device is the small total area of the drainage holes, which leads to a low efficiency of removing fluids from the cavities, and due to the tight fit of the device to the wound walls, the holes are covered with tissues, cellular detritus, which leads to a violation of drainage functions.

A drainage device is known, including an aspiration device made in the form of a flexible pipe having the shape of a hollow cylinder, the interior of which is divided into irrigation channels by longitudinal partitions having a curved cross section. Moreover, each channel is made with through slotted windows located along a helical line in the surface of the pipeline, and the proximal end of the pipeline is connected through an adapter with an exhaust tube [RF Patent 2619246, IPC A61M 27/00]. The disadvantage of such a drainage device, as described above, is the need for additional fixation to the tissues, as well as the low area of the drained surface.

Close in technical characteristics to the proposed one is a two-lumen drainage device having a silicone tube with large and small channels, in the small channel of which a metal rod is installed [RF Patent 2313371, IPC A61M 27/00]. The significant rigidity of the materials used for the manufacture of the drainage device contributes to additional tissue trauma and damage to the pyogenic membrane, which can lead to the spread of infection. Drainage holes and holes of the irrigator (injector, nozzle) due to the tight fit of the device to the walls of the wound are covered with tissues, cellular detritus disrupting the main drainage functions. Double-lumen silicone drainage, which has a metal rod in one of its channels, requires a significant incision at the installation stage, sealing the wound with sutures, fixation, and, if necessary, re-fixation, which subsequently worsens the cosmetic effect.

The technical result achieved by the present invention is to increase the mobility of the drainage device due to the elastic-screw design of the device and the absence of additional fixation to the tissues, and the use of a relatively soft material - silicon-containing rubber (silicones) reduces the pain of the patient. This design makes it possible to more effectively sanitize cavities, and, if necessary, to remove a double-lumen injector-nozzle drain with screw fixation for maintenance or replacement with a drain of a different caliber. An inner smooth tube with four nozzle-type injectors on top allows spraying the wash solution under pressure created by the syringe plunger in the form of a fine suspension over a large area of the drained cavity. Also, due to low tissue trauma and more efficient drainage, the invention allows to reduce the time of sanitation and improve the cosmetic effect.

In FIG. 1 shows a general view of a double-lumen injector-nozzle drainage with screw fixation.

In FIG. 2 shows a longitudinal section of a double-lumen injector-nozzle drainage with screw fixation.

The invention is a double-lumen injector-nozzle drainage, having the form of an elastic screw, which is an outer tube made of a relatively soft material - silicon-containing rubber (silicone) (Fig. 1).

The length of the drainage varies from 3 to 20 cm, having a diameter of 4 to 18 mm.

On the body of the drain, between the threads (5), there is a row of drainage holes with a diameter of 1-4 mm, in the amount of 3 to 10 pieces, which minimizes the effect of "sticking" by reducing their cover by tissues and cellular detritus (1). An inner smooth tube with four nozzle-type injectors at the top (2) allows for more efficient sanitation of cavities: the antiseptic is injected under pressure created by the syringe plunger and sprayed in the form of a fine suspension.

The central channel has an internal diameter of up to 2.5 mm (3). This simplifies the installation of the drainage device along the conductor due to rotational movements in the direction of the thread.

The proximal drainage section is equipped with two holes: the central hole (it is also the central channel), corresponding to the size of a standard cannula, and the peripheral one (4) - of a larger diameter, which in combination contribute to the unhindered introduction of solutions into the cavity, as well as outflow and aspiration of its contents.

Drainage is used as follows:

1. Estimate the size of the drained cavity in order to adequately select the diameter and length of the drainage device and the number of holes (physical examination, ultrasound, CT, MRI, fistulography, etc.).

2. Calculate the size of the tissue incision corresponding to the diameter of the drainage without taking into account the height of the thread.

3. A bellied probe (conductor) is inserted into the wound, through which drainage is introduced into the wound with rotational movements, in the direction of the threads.

4. The probe (conductor) is removed.

5. Using a syringe, aspirate the contents, if necessary, with the variable administration of an antiseptic.

6. Due to the elastic thread, the drainage is securely fixed in the tissues, having sufficient freedom of movement. Additional fixing is not required.

7. Through the central drainage channel, an antiseptic is fed into the cavity under excess pressure created by a Janet-type syringe.

8. Aspiration is carried out passively through the peripheral channel or with the help of a medical aspirator with adjustable vacuum.

9. By moving the drainage in the wound, a better irrigation of the cavity with antiseptics and aspiration of the discharge are achieved.

The control of the residual cavity is carried out with the help of fistulography.

The effectiveness of treatment is assessed by the amount and nature of the discharge, clinical signs, the patient's condition, laboratory data, and local signs.

Claims (1)

Double-lumen injector-nozzle drainage, made in the form of a screw, characterized in that it consists of an outer tube with a thread, between the turns of which there are drainage holes, and an inner tube with four injectors of the type of nozzles on top, while the proximal section of the drainage is equipped with two holes: the central opening - it is also the proximal opening of the central canal - and the peripheral one.

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