JPS6034281Y2 - Neurosurgical reservoir - Google Patents

Description

[Detailed explanation of the device] This device is used for brain surgery, especially when bleeding occurs in the brain parenchyma or subdural area due to a blow to the head or a traffic accident. This reservoir was developed to inject liquid medicine underneath, and can also be used as a reservoir for chronic subdural hematoma.

This will be explained in detail below with reference to the accompanying drawings.

FIG. 1 shows a cross section of the reservoir according to the invention, and FIG. 2 shows the back side of the reservoir. 1 is a liquid storage chamber, 2 is a sheet-like substrate, 3 is an annular burr hole, and 4 is a connecting tube.

The liquid reservoir chamber 1 has a hollow semi-molded shape, and is formed integrally with the substrate 2.

A bar hole portion 3 consisting of an annular side wall is formed integrally with the lower surface of the substrate 2, and a cutout portion 3a is provided in the side wall at a symmetrical position (a position symmetrical to the central axis of the annular bar hole portion). ing.

This notch is used as an air escape to prevent air from entering the skull, and is also used to reduce the diameter of the burr hole by pressing it with your fingers when fitting the burr hole into the hole in the skull. This is provided to make it easier to enter the hole.

Note that although the figure shows a case in which the notches 3a are provided at two locations, the notches may be provided at two or more locations.

The coupling tube 4 is provided so as to pass through the substrate 2 from approximately the center of the burr hole portion 3 and communicate with the liquid reservoir chamber 1, and its lower end is long enough to be flush with the lower surface of the burr hole portion. is set.

In the figure, 4a shows an auxiliary L-shaped tube connected to the tip of the coupling tube 4, but a straight tube may be used as necessary.

Note that silicone rubber is suitable as the rubber-like elastic body that is harmless to living organisms and forms the reservoir.

Figure 3 shows the state in which the reservoir of this invention is used for chronic subdural hematoma, where A is the scalp, B is the skull, C is the dura mater, and D
is the arachnoid membrane, and E is the brain parenchyma.

The reservoir of the present invention is fixed by fitting into a hole drilled in the skull B.

The hematoma cavity offering enters from the L-shaped tube 4a, passes through the connecting tube 4, and accumulates in the liquid reservoir chamber 1.

The accumulated blood and other liquid substances are sucked out by inserting a needle into the liquid reservoir chamber 1 from above the scalp A.

Conversely, by injecting the chemical liquid into the liquid storage chamber 1, the chemical liquid can also be ejected from the tip of the L-shaped tube 4a.

In this case, to prevent penetration of the injection needle, an annular plate 5 made of metal or plastic, such as stainless steel or fluororesin, may be provided at the base of the inner wall of the liquid reservoir 1, as shown in FIG.

Further, this plate 5 may be formed integrally with the coupling tube 4.

The reservoir of this invention is used by fitting the burr hole part 3 into a hole drilled in the skull.

Even if the hole drilled in the skull is smaller than the outer diameter of the burr hole 3, since the burr hole has a notch 3a, if pressure is applied from the side, the burr hole 3 will be centered as shown in Figure 4. It can be installed tilted in any direction.

In addition, since the burr hole part 3 is annular and the tip of the connecting tube 4 exposed from the center is flush with the bottom surface of the burr hole part, connection with the L-shaped tube is possible inside the burr hole, and the annular burr hole If the height of the skull is set to a height that takes into account the thickness of the skull, for example, 5 questions, the reservoir can be installed without damaging the brain parenchyma.

[Brief explanation of the drawing]

Figure 1 is a sectional view of the proposed reservoir, Figure 2 is a back view, and Figure 3 is a cross-sectional view of the proposed reservoir.
FIG. 4 and FIG. 4 are explanatory diagrams of usage modes, respectively. 1...Liquid reservoir chamber, 2...Sheet-like substrate,
3...Bar hole part, 3a...Notch part, 4...Connection tube, 4a...L-shaped tube.

Claims (1)

[Scope of utility model registration request] A hemispherical liquid reservoir 1 is formed on a sheet-like substrate to be embedded between the scalp A and the skull B, and a hemispherical liquid reservoir 1 is formed on the underside of the substrate to fit into a hole drilled in the skull B. It has a burr hole part 3 consisting of an annular side wall, and a connecting tube 4 formed so as to penetrate the substrate from approximately the center of the burr hole part 3 and communicate with the liquid reservoir chamber 1, and the entirety thereof is harmless to living organisms. The side wall is made of a rubber-like elastic material, and the side wall has at least two holes symmetrical to the central axis of the annular bar hole.
Two notches 3a are provided, and the lower surface of the burr hole part 3 and the lower end of the connecting tube 4 are formed on the same plane. A neurosurgical reservoir used for injecting medical solutions.