RU167743U1 - Trocar for insertion into the abdominal cavity or pleural cavity of the system for ventriculoperitonial and ventriculopleural drainage - Google Patents

Abstract

The utility model relates to medical equipment and can be used for ventriculoperitoneal drainage. A trocar for insertion into the abdominal cavity or pleural cavity of the system for ventriculoperitoneal drainage includes a sleeve in the wall of which a longitudinal cut is made with a width of 4-5 mm, the edges of which are rounded. The stylet, which enters the sleeve along a sliding fit, runs along the stylet a rectangular protrusion equal to the thickness of the sleeve wall, which enters the slot of the sleeve. The proposed trocar design allows to reduce excessive intracranial pressure using a system, one end of which enters the cavity of the brain, and the other into the pleural cavity of the lung or abdominal cavity. 3 ill.

Description

The utility model relates to medical equipment and can be used for ventriculoperitonial and ventriculopleural drainage.

A trocar containing a tube is known from the prior art, in which a tool with a sealant and a valve mechanism can be moved in the form of a shutter blocking the tube cross section (German Patent 4213691, class IPC АВВ 17/34, 1995).

Known trocar containing a cannula, on the outer surface of which at a distance of 19-21 mm from its end, a longitudinal guide is made in the form of a groove 2 mm deep, 2 mm wide, 6-9 cm long, and the protruding edges of the groove are rounded (patent RU No. 2408310? C. IPC А61В 17/34, 2011).

Also known is a trocar having a sleeve and a stylet installed in it (German Patent 4205823, CL IPC AB 17/34, 1995).

The closest to the proposed utility model and taken by the authors for the prototype is the "Wing drainage sleeve" of the "Wing" company of the city of Voronezh, published on the website http://krvlo.ru/instrument/troakarv-torakoportv in 2015, containing the sleeve and installed in it stylet, along the sleeve on the outside there is a longitudinal guide in the form of a groove.

All of the above devices are designed for the introduction of endoscopic instruments into the cavity during laparoscopic and thoracoscopic operations, as well as for the extraction of removed tissue or organ fragments from the cavities, such as the gall bladder. They are not designed for ventricular drainage in order to reduce intracranial pressure. For example, drainage from the cranial cavity to the abdominal cavity or pleural cavity, since after the introduction of drainage originating from the cranial cavity and fixed therein into the chest or abdominal cavity through the sleeve, this sleeve cannot be removed from the drainage due to its continuity, but drainage in the cavity (after removing the sleeve) using conventional surgical instruments is extremely inconvenient and dangerous.

Technical result

Providing ventriculoperitonial drainage from the cranial cavity to the abdominal cavity or pleural cavity.

The technical result is achieved due to the trocar, which includes a sleeve, in the wall of which there is a longitudinal slot 4-5 mm wide, the edges of which are rounded, a stylet entering the sleeve along a sliding fit along which a rectangular protrusion passes, a height equal to the thickness of the sleeve wall, a protrusion enters the slot of the sleeve, the edges of the protrusion and the slot of the sleeve are rounded.

In FIG. 1 shows a general view of a trocar;

In FIG. 2 general view of the stylet;

In FIG. 3 section A.A of FIG. 1 enlarged view.

The trocar contains a sleeve 1, in the wall of which is made a longitudinal slot 2 with a width of 4-5 mm, the edges of which are rounded. Stylet 3 enters the sleeve on a sliding fit. A rectangular protrusion 4 extends along the stylet 3. The height of the protrusion is equal to the wall thickness of the sleeve 1. The protrusion 4 enters the slot 2. The lateral edges of the protrusion are also rounded. The sliding fit of the stylet into the sleeve and the height of the stylet protrusion equal to the thickness of the sleeve wall ensure the unhindered introduction of the trocar and the removal of the drainage system outside the sleeve and its removal, leaving drainage in the cavity. To relieve intracranial pressure, a standard, well-known circular system is used.

The system passing from the cavity of the brain into the pleural cavity through the trocar is as follows. Drainage is carried out subcutaneously, according to the standard method, to the point of immersion in the selected cavity. A trocar is inserted into the pleural cavity or abdominal cavity so that the end of the slot 2 of the sleeve is at a depth of 5-10 mm in the cavity. After the introduction of the trocar, for example, into the pleural cavity, the stylet is removed. A drainage system is introduced into the sleeve 1 so that the tip of the system exits from the groove 2 into the pleural cavity. After the system is removed from the sleeve, the trocar is removed from the hole, and the tip of the system remains in the pleural cavity, the wound is sutured.

The essence of the utility model.

The proposed trocar design allows you to remove excess intracranial pressure using a system, one end of which enters the cavity of the brain, and the other into the pleural cavity or abdomen through the opening of the sleeve, the end of which is located, for example, in the pleural cavity, and the system itself moves through the longitudinal a groove made in the sleeve beyond the walls of the sleeve of the trocar. After removing the sleeve of the trocar from the wound hole, the end of the system remains inside the pleural cavity.

Claims (1)

The trocar for insertion into the abdominal cavity or pleural cavity of the system for ventriculoperitoneal drainage includes a sleeve, in the wall of which there is a longitudinal slot 4-5 mm wide, the edges of which are rounded, the stylet, which enters the sleeve along a sliding fit, passes a rectangular protrusion equal to the thickness along the stylet the wall of the sleeve, which enters the slot of the sleeve.

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