JP3126094B2 - L-shaped clip for catheter fixation in ventricular shunt - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a catheter for fixing a catheter in a ventricle-peritoneal shunt or a ventricle-atrial shunt (hereinafter referred to as "ventricular shunt") which is implanted in a patient with hydrocephalus by surgery. Related to L-shaped clips.

[0002]

2. Description of the Related Art A conventional ventricular shunt as shown in FIG. 8 has been proposed. That is, the ventricular shunt is a tubular ventricular catheter 2 inserted into the ventricle.
And a shunt body 1 composed of a reservoir 3 and a valve 4 connected to the ventricular catheter 2, a tubular abdominal catheter or atrial catheter 5 connected to the shunt body 1 and inserted into the abdominal cavity or atrium. Consists of
The ventricular catheter 2 is fixed by an L-shaped clip 6.

That is, as shown in FIG. 9, the L-shaped clip 6 is formed by bending a hollow cylindrical body at a substantially right angle, and has support portions 6a, 6a of the ventricular catheter 2 formed at the front and rear ends. I have. Reference numeral 6b indicates a slit for inserting a catheter formed on each back surface of the support portion 6a. The shunt body 1 and the L-shaped clip 6 are embedded under the head.

[0004]

As described above, the conventional L-shaped clip is formed in an L-shape as a whole, and is disposed with its lower end facing a circular hole formed in the skull. However, there is a possibility that cerebrospinal fluid leaks from a gap between the outer peripheral surface of the L-shaped clip and the inner peripheral surface of the circular hole, and FIG.
As shown in (1), there is a problem that the L-shaped clip 6 may fall into a circular hole 7a formed in the skull 7. Reference numeral 8 in FIG. 10 indicates the scalp, and reference numeral 9 indicates the dura.

[0005] Conventional L-shaped clip der synthetic resin
Hard for that, there is also a problem that the adverse effects on the human body. An object of the present invention is to provide an L-shaped clip for fixing a catheter in a ventricular shunt that has solved such a problem.

[0006]

In order to achieve the above object, an L-shaped clip for fixing a catheter in a ventricular shunt according to claim 1 is a cylinder which can be inserted into a clip insertion hole formed in a skull. A ventricular catheter having a main body as a body and a dome part integrally formed on the upper part of the main body and having a brim part having a larger diameter than the circular hole and protruding from the periphery thereof, penetrating the main body and the dome part And a clip portion having a holding portion capable of elastically holding the ventricular catheter is integrally formed with the dome portion, and the cylindrical portion is formed as the cylindrical body.
Has a depth substantially equal to the depth of the circular hole.
Thereby, the collar part is seated on the upper surface of the skull, and
It is characterized in that it is configured to close the circular hole .

According to a second aspect of the present invention, there is provided an L-shaped clip for fixing a catheter in a ventricular shunt according to the first aspect of the present invention. Each of them is characterized in that it is formed in a circular shape in a plan view and is formed as an integrally molded product having no squared portion including the clip portion.

According to a third aspect of the present invention, there is provided an L-shaped clip for fixing a catheter in a ventricular shunt according to the first aspect of the present invention. It is characterized in that each of the clip portions is formed as an integral molded product of silicon rubber.

[0009]

In the above-described L-shaped clip for fixing a catheter in the above-mentioned ventricular shunt of the present invention, a collar portion having a diameter larger than the diameter of the clip insertion hole formed in the skull falls into the hole of the L-shaped clip. In addition, the collar portion closes the hole and prevents leakage of cerebrospinal fluid. In addition, since the entire L-shaped clip is formed by silicone rubber into a shape having no squared portions, it does not give excessive stimulation to the human body.

[0010]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view of an L-shaped clip for fixing a catheter in a ventricular shunt according to an embodiment of the present invention; FIG. 4 is a front view as viewed in the direction of the arrow B in FIG. 1, FIG. 5 is a side view as viewed in the direction of the arrow C in FIG. 1, and FIGS. 6 and 7 are schematic views showing a state of attachment to the skull. 1 to 7, the same reference numerals as those in FIGS. 8 to 10 indicate substantially the same members.

[0011] L-shaped clip 10 shown in FIG. 6, 7 of the embodiment is made entirely of molded articles in which the silicone rubber as a raw material, as shown in FIG. 1-5, the clip insertion skull 7
A circular shape in a plan view, which is made of a molded product made of silicon rubber and has a flange portion 12 in a plan view having a circular shape in a top portion of a main body 11 as a cylindrical body having substantially the same depth as the depth of the circular hole 7a. Dome 13 is seated on the upper surface of the skull 7 through the collar 12
It is formed so as to be integrally formed.

In order to insert the ventricular catheter 2 into the main body 11 and the dome portion 13, the main body 11 and the dome portion
A ventricular catheter placement passageway 14 communicating with 13 is formed. An arcuate wall surface 14 a for bending the ventricular catheter 2 by approximately 90 ° is formed in the disposing passage 14, and one end of the disposing passage 14 is formed on the lower end surface of the main body 11. Communicating with the insertion circular hole 11a of the chamber catheter 2;
The other end of 14 communicates with the insertion hole 13b of the ventricular catheter 2 formed on the side surface of the dome portion 13.

A clip portion 15 is provided protruding from one side of the dome portion 13 to fix the ventricular catheter 2.
The clip portion 15 is made of silicone rubber, is integrally formed with the dome portion 13, and is capable of holding (fixing) the ventricular catheter 2 from both sides by the elastic force of the silicone rubber. It has 15b.

The pair of holding portions 15a, 15b extend linearly from the center of the dome portion 13 toward one side edge in parallel with each other, and are substantially between the opposing inner wall surfaces of both holding portions 15a, 15b. An arrangement path 15d for the ventricular catheter 2 having a circular cross section is formed, and a slit 15c narrower than the diameter of the ventricular catheter 2 is formed between the upper edges of the sandwiching portions 15a and 15b. slit
The inner end of 15c is formed in the center of the upper surface of the dome portion 13 and has the same diameter as the ventricular catheter 2 as a circular hole 13a (the circular hole 13a
Communication). The inner end of the arrangement path 15d communicates with the insertion circular hole 13b.

The flange 12 protrudes from the periphery of the connecting portion between the main body 11 and the dome portion 13 and has a larger diameter than the main body 11 and a larger diameter than the clip insertion hole 7 a formed in the skull 7. It is formed in a shape. The flange portion 12, insertion hole of the thread for sewing the L-shaped clip 10 to the scalp 12 a (3 pieces) is provided. The L-shaped clip 10 is formed into a smooth outer surface shape without point that angular as a whole.

In the above configuration, the setting of the ventricular catheter 2 to the L-shaped clip 10 is performed as follows. That is, the main body 11 is inserted into the circular hole 7a formed in the skull 7. At this time, the main body 11 is almost the same as the circular hole 7a.
The same body 11 is inserted into the circular hole 7
Is kept stable and causes interference with the dura 9
There is no. Since the flange 12 having a diameter larger than the diameter of the circular hole 7a is integrally formed at the upper portion of the main body 11, the flange 12 is prevented from dropping into the circular hole 7a while the L-shaped clip 10 is being dropped.
The seating of the twelve skulls 7 on the upper surface is performed stably .

Next, the ventricular catheter 2 is connected to the dome portion 13.
From the circular hole 13a formed in the center of the upper surface of the upper part of the figure, through the arrangement passage 14 and the insertion circular hole 11a in this order, it is vertically inserted into the ventricle 20 to a predetermined depth in the arrow F direction (FIG. 3). The state shown by the two- dot chain line and the state shown in FIG. 6). After that, the portion of the ventricular catheter 2 protruding from the upper surface of the dome portion 13 is tilted to the left in FIGS. Fifteen
Insert in d.

At this time, the holding portions 15a, 15a are deformed by elasticity to allow the ventricular catheter 2 to pass through the slit 15c, and are restored by the elastic force immediately after the ventricular catheter 2 passes through the slit 15. The ventricular catheter 2 is elastically held by the holding portions 15a, 15a (the state shown by the solid line in FIG. 3 and the state shown in FIG. 7). After setting the ventricular catheter 2 to the L-shaped clip 10 in this way,
The mold clip 10 is covered with the scalp 8, and the insertion hole 12a is
And sewn to the scalp 8.

As described above, the L-shaped clip of this embodiment
10 keeps the insertion state of the main body 11 into the circular hole 7a stable.
Uruhoka, since the flange portion 1 2 of large diameter is formed integrally with the upper portion of the body 11 is properly seated on the upper surface of the skull 7, there is no possibility that the L-shaped clip 10 from falling into the circular hole 7a, further circular hole 7a Gatsuba section 1 there is no fear that a gap spinal fluid leaking from between the circular hole 7a and the main body 11 because it is closed by two. The main body 11, the flange portion 12 and the dome portion 13 are both formed in a circular shape in plan view, and is formed into a smooth outer surface shape without partial or uneven portions angular whole, yet entirely rich in elasticity And because it is made of soft silicone rubber, it does not irritate the living body.

[0020]

As described in detail above, according to the L-shaped clip for fixing a catheter in a ventricular shunt of the present invention,
The following effects or advantages can be obtained. (1) Almost the same as the clip insertion hole formed in the skull
The main body of the depth is stably inserted into the same hole,
Head flange portion of the large diameter formed in the dome portion periphery of the body top
Seated on the upper surface of the lid bone, since the flange portion to prevent drop of a to L-shaped clip of the circular hole, stabilize the L-shaped clip
It can be properly mounted in the above-mentioned circular hole. (2) The above-mentioned hole is sufficiently closed by the above-mentioned collar .
Thus, it is possible to prevent the cerebrospinal fluid in the skull from leaking from the same hole . (3) the entire L-shaped clip is formed in the outer surface shape without having angle aeration portion of the dome portion, and since the silicone rubber, it is not possible to stimulate biological. (4) The collar is formed around the dome.
Suitable for insertion into narrow spaces between scalp and skull
Done in

[Brief description of the drawings]

FIG. 1 is a plan view of an L-shaped clip for fixing a catheter in a ventricular shunt as one embodiment of the present invention.

FIG. 2 is a bottom view of the same.

FIG. 3 is a sectional view taken along the line AA of FIG. 1;

FIG. 4 is a front view as viewed in the direction of arrow B in FIG. 1;

FIG. 5 is a side view of FIG.

FIG. 6 is a schematic diagram showing a state of attachment to a skull.

FIG. 7 is a schematic diagram showing a state of attachment to a skull.

FIG. 8 is a schematic configuration diagram of a conventional ventricular shunt.

FIG. 9 is a perspective view of the catheter fixing L-shaped clip.

FIG. 10 is a schematic cross-sectional view showing a state where an L-shaped clip has dropped into a circular hole formed in the skull.

[Explanation of symbols]

Reference Signs List 1 shunt body 2 ventricular catheter 3 reservoir 4 valve 6,10 L-shaped clip 7 skull 7a clip insertion hole 8 scalp 9 dura 11 body 11a insertion hole 12 collar 12a thread insertion hole 13 dome 13a, 13b Insertion hole 14 Arrangement passage of ventricular catheter 14a Arc-shaped wall surface 15 Clip part 15a, 15b Nipping part 15c Slit

Continuation of the front page (56) References JP-A-59-74 (JP, A) JP-A-60-100973 (JP, A) JP-A-7-506994 (JP, A) (58) Fields investigated (Int) .Cl. ⁷ , DB name) A61M 25/02 A61M 1/00 520

Claims (3)

(57) [Claims] 1. A main body as a cylindrical body that can be inserted into a clip insertion hole formed in a skull, and a flange formed integrally with an upper portion of the main body and having a larger diameter than the circular hole protrudes from a peripheral edge. A dome portion is provided, and a catheter arrangement passage is formed through the main body and the dome portion so that the ventricular catheter can be bent at approximately 90 °, and the dome portion can elastically hold the ventricular catheter. Clip part with a
The main body as the columnar body has a depth substantially equal to the depth of the circular hole.
By having the same depth, the collar part is
An L-shaped clip for fixing a catheter in a ventricular shunt, wherein the L-shaped clip is configured to be seated on an upper surface of the ventilator to close the circular hole . 2. The L-clip for fixing a catheter in a ventricular shunt according to claim 1, wherein the main body, the collar, and the dome are each formed in a circular shape in plan view and include the clip. An L-shaped clip for fixing a catheter in a ventricular shunt, wherein the L-shaped clip is formed as an integral molded article having no squared portions as a whole. 3. The L-clip for fixing a catheter in a ventricular shunt according to claim 1, wherein the main body, the collar, the dome, and the clip are all formed as an integrally molded product of silicone rubber. An L-shaped clip for fixing a catheter, characterized in that: