JP2000135291A - Medical valve disk - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a medical valve disk which can reduce the insertion resistance when such an inserting article as a catheter is inserted, which can be easily operated, which doesn't produce leakage of blood, etc., when the inserting article is inserted, which is simple-structured, and whose cost can be reduced. SOLUTION: A dent 12 is formed on the board surface 10 of this medical valve material into which a guide wire or catheter is inserted, and a groove 13 extending in the radial direction is formed on the board surface 11 from which the inserted guide wire or catheter protrudes. And in the valve part 16, a slit 17 is formed in the thickness direction of a thin part 15 formed between the groove 13 and the dent 12. On the opposite side to the insertion side, ends of the slit 17 are made to extend toward the thick parts 18 formed around the thin part 15. Therefore, compared with a board-type valve disk, this valve material allows an inserting article such as a guide wire or catheter to be inserted more easily with less insertion resistance.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a medical valve used for a catheter introducer when a medical tube such as a catheter is introduced into a body (particularly a blood vessel).

[0002]

2. Description of the Related Art When inserting catheters into the body for the purpose of diagnosis or treatment, particularly when inserting a vascular balloon catheter, an angiographic catheter, or a catheter with a sensor for detecting temperature, pH, oxygen, etc. Safe and secure means are needed.

For example, angiographic catheters are widely used for diagnosis and treatment of organs and blood vessels. This catheter is inserted into a guide wire previously inserted into a blood vessel, and after inserting a dilatation tubule, is inserted to a target position in the blood vessel.

As a method of using a tool as an auxiliary means for percutaneously introducing a vascular catheter into a blood vessel, a cell singer method is known. In this method, a hollow needle with an inner needle is percutaneously penetrated through the skin and introduced into a blood vessel, and then a guide wire is inserted into the hollow needle from which the inner needle has been removed, and the hollow needle is removed and guided. Leaving only the wire,
Next, an introduction tool is inserted along the guide wire, and a catheter that has been opened to the distal end and penetrated to the terminal is inserted into a blood vessel.

[0005] The introduction tool (catheter introducer) used here has a valve body made of an elastic material for preventing outflow of blood. When the catheter penetrates through the main body of the catheter introducer through the valve body. In this penetrating state, backflow and outflow of blood are prevented.

As a conventional valve body, for example, a first valve member having a small hole in the center and a second valve member having a Y-shaped slit are provided.
There has been proposed a device that is presumed to be used in a state of being joined to a valve member. When the two valve members are joined and used as described above, it is difficult to keep both members in close contact with each other, and when the two valve members are separated from each other, blood leakage occurs. I do. Further, since two valve members are required, there is a problem that not only the structure becomes complicated but also the cost becomes high.

To solve this problem, Japanese Utility Model Application Laid-Open No. 1-8
In No. 7746, the valve body is a single disc-shaped valve body, a mortar-shaped cutting portion is formed on one side of the valve body, a fine hole is provided at the center, and the cut is made to pass through the center of the fine hole. Things have been suggested.

[0008]

However, when the insertion and withdrawal of the catheter is repeated or the indwelling is performed for a long time, for example, the incision extends to reach the surface on the pore side, and the crack spreads. There was a problem that a liquid (blood) leak occurred. In order to solve this problem, it is conceivable to increase the thickness of the valve body itself and reduce the leakage of liquid, but in this case, the insertion resistance at the time of insertion of the catheter or the like increases,
There is a problem that operation becomes difficult.

SUMMARY OF THE INVENTION An object of the present invention is to solve the conventional problems, and an object of the present invention is to reduce the insertion resistance at the time of inserting a catheter, to operate the catheter easily,
An object of the present invention is to provide a medical valve element that does not leak blood or the like when an insertion object such as a guidewire or a catheter is inserted, has a simple structure, and can be reduced in cost.

[0010]

In order to achieve the above-mentioned object, a first aspect of the present invention is to provide a medical valve body comprising a valve portion formed so that an object can be inserted therein and made of a flexible elastic material. In, on the insertion side surface where the insertion object is inserted,
A recess is formed, a groove extending in the radial direction is formed on the opposite side surface on which the inserted object projects, and the valve portion includes:
A slit is formed in a thickness direction of a thin portion formed between the groove and the concave portion, and a non-insertion side end portion of the slit on a bottom surface of the groove has a thick wall formed around the thin portion. The present invention provides a medical valve body formed to extend toward a part.

According to a second aspect of the present invention, there is provided a medical valve element according to the first aspect, wherein the plurality of grooves are radially formed around a predetermined position of the valve element. Claim 3
In the invention of claim 1 or 2, the cut length of the insertion-side end of the slit at the bottom surface of the recess is shorter than the diameter of the recess, and the counter-insertion end of the slit at the bottom surface of the groove. The incision length of the portion is a gist of a medical valve body having substantially the same length as the groove width.

[0012] The invention of claim 3 is claim 1 or claim 2.
The gist of the present invention is to provide a medical valve body in which a cut length of an insertion-side end of the slit on a bottom surface of the concave portion is shorter than a diameter of the concave portion.

The invention according to claim 4 is the invention according to claims 1 to 3.
In any one of the above aspects, a gist of the present invention is a medical valve body in which a cut length of an end of the slit on the side opposite to the insertion side of the slit is substantially equal to a width of the groove.

The invention according to claim 5 is the invention according to claims 1 to 4.
In any one of the above, a medical valve body in which a hole having a diameter substantially the same as the width of the groove is formed in the groove, and a non-insertion side end of the slit faces the hole. It is an abstract.

The invention of claim 6 is the first to fifth aspects of the present invention.
In any one of the above, the gist of the present invention is a medical valve body in which the width of the groove is shorter than the diameter of the recess.

The invention according to claim 7 is the invention according to claims 1 to 6.
In any one of the above, the gist of the present invention is a medical valve element in which the slit is formed in a tapered shape from an insertion side end to a non-insertion side end.

The invention according to claim 8 is the invention according to claims 1 to 7.
In any one of the above, the slit is a medical valve body formed in a Y-shape.
According to a ninth aspect of the present invention, in any one of the first to seventh aspects, the slit is a gist of a medical valve body formed in a straight line.

According to a tenth aspect of the present invention, in any one of the first to eighth aspects, the groove is formed in a Y-shape around a predetermined position of the valve body. It is the gist.

According to an eleventh aspect of the present invention, in any one of the first to tenth aspects, the groove extending from the center of the valve body to the peripheral portion is closed so as not to open at the peripheral portion. The gist is a medical valve element.

(Operation) According to the first aspect of the present invention,
When the insertion object is inserted into the recess on the insertion side of the medical valve,
Since the thin portion formed between the bottom surface of the concave portion and the bottom surface of the groove is thinner than the other portions, the insertion resistance is low and the thin portion can be easily inserted. Also, since the opposite end of the slit on the bottom surface of the groove is formed so as to extend toward the thick portion formed around the thin portion, when the insertion object is inserted, the same thick portion is formed. The occurrence of cracks in the part is prevented.

Since the insertion side surface of the valve body is formed with a concave portion, the progress of the crack is suppressed by the thick portion around the concave portion. According to the second aspect of the present invention, in addition to the function of the first aspect, the plurality of grooves are formed radially, so that when the insertion object is inserted into the slit, the thickness of the groove is reduced. Are easily bent and the insertion resistance is further reduced.

According to the third aspect of the present invention, the first aspect is provided.
Or, in addition to the effect of any one of claims 2, even when the insertion-side end portion of the slit has a crack in the groove width direction, the crack is restricted by the thick portion formed on the peripheral edge of the concave portion. The occurrence of cracks beyond the concave portions is prevented.

According to the fourth aspect of the present invention, the cut length of the slit at the end opposite to the insertion side on the bottom surface of the groove is substantially the same as the groove width. The cut end extending in the direction is restricted to a thick portion where no groove is formed, thereby preventing the occurrence of cracks.

According to the fifth aspect of the present invention, since the hole is formed in the groove and the end opposite to the insertion side of the slit faces, the thickness of the portion is further reduced and the insertion resistance is further reduced. . Further, when a small-diameter insertion object is inserted into the valve body, the film in the hole easily adheres to the insertion object, so that leakage of blood or the like can be prevented.

According to the sixth aspect of the present invention, since the width of the groove is shorter than the diameter of the recess, the insertion object having a diameter smaller than the diameter of the recess but larger than the groove width. Is inserted, the insertion resistance at that time is reduced.

According to the seventh aspect of the present invention, since the slit is formed so as to be tapered from the insertion side end to the non-insertion side end, it becomes easier for the inserted object to be inserted into the slit. The insertion resistance of the inserted object is reduced.

According to the eighth aspect of the present invention, in addition to the function of any one of the first to seventh aspects, the slit is formed in a Y-shape, so that the slit is formed in a Y-shape. In the portion formed in the above, the insertion resistance of the insertion object is reduced.

According to the ninth aspect of the present invention, in addition to the function of any one of the first to seventh aspects, the slit is formed in a straight line because the slit is formed in a straight line. The insertion resistance of the inserted object is reduced in the portion where the insertion is made.

According to the tenth aspect of the present invention, in addition to the function of any one of the first to eighth aspects, the groove is formed in a Y-shape with the predetermined position of the valve body as a center. With this configuration, when the insertion object is inserted into the slit, the thinned groove is easily bent, and the insertion resistance is further reduced.

According to the eleventh aspect, in addition to the function of any one of the first to tenth aspects, the groove extending from the center of the valve body to the peripheral portion is opened at the peripheral portion. By being closed so as not to be blocked, the closed portion becomes thick. Therefore, when assembling the medical valve body to the catheter introducer, the periphery thereof is made thick, so that the peripheral portion thereof can have a predetermined rigidity and the assembling property is improved.

[0031]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) A preferred first embodiment of a medical valve body embodying the present invention will be described below with reference to FIGS. 1 to 4 and FIG.

FIG. 16 is a sectional view of an example of the catheter introducer. As shown in FIG. 1, the catheter introducer 1 includes a main body 2, an end cap 3, and a medical valve body (hereinafter, referred to as a valve body) 4 made of an elastic material for preventing blood from flowing out. ing. The main body 2 is formed in a cylindrical shape, and is provided with a nozzle 6 to which a sheath 5 is attached at a distal end. A nozzle 7 for attaching a heparin injection pipe is formed on a side of the main body 2.

The end cap 3 has a small hole 8 at the center,
It is tightly fitted and fixed to the outer periphery of the base end of the main body 2. The valve body 4 is disposed between the base end of the main body 2 and the end cap 3, and is closely fitted to the inner peripheral surface of the end cap 3.

Next, the valve element 4 will be described in detail. The valve element 4 is
It is made of a flexible elastic material that has appropriate flexibility and is elastically deformed when an external force is applied, and quickly restores its original shape when the external force is removed. As the flexible elastic material, a material having high resilience such as polyurethane elastomer, polyamide elastomer, natural rubber, synthetic rubber, and silicone rubber is suitable. Desirably, medical silicone rubber made of dimethylpolysiloxane is used from the viewpoint of safety.

As shown in FIG. 1, the valve body 4 has a parallel plate surface 1.
It is formed in a disk shape having 0,11. The plate surface 10 constitutes the insertion side surface of an insert such as a catheter, and the plate surface 11
Constitutes the side surface on the non-insertion side. A depression 12 is formed at the center of the plate surface 10 as a recess. Depressed part 12
Is a central axis O of the valve body 4 as shown in FIGS.
Are concentric and coaxial with each other, and have a diameter substantially the same as or slightly larger than the diameter of the catheter 21 to be inserted.
The thickness between the bottom surface of the depression 12 and the plate surface 11 is determined by the groove 1 described later.
3 except for the same thickness. That is, the depth of the depression 12 from the plate surface 10 is the same throughout the entire area.

As shown in FIGS. 1 (b) and 1 (d), the groove 13 forming the groove is formed to extend over the entire diameter of the valve body 4 with respect to the plate surface 11. That is, the groove 13 is provided radially from the central axis O of the valve body 4. The groove portion 13 is recessed in a horizontal U-shape in cross section, and the groove width is constant over the entire length.

In this specification, the groove width of the groove 13 is orthogonal to the central axis O of the valve body 4 (which coincides with the insertion center through which an object such as a catheter is inserted) as shown in FIG. And groove 1 included in a plane along plate surface 11
3 indicates the total value (2d) of the distances d from the center line L (see FIG. 1D) to both sides defining the groove 13.

As shown in FIGS. 3C and 3D, a thin portion 15 is formed between the bottom surface of the groove 13 and the bottom surface of the depression 12. The thin portion 15 is provided with a valve portion 16. The valve portion 16 has a slit 17 in the thin portion 15.
It is formed by being cut in the thickness direction from the bottom surface of the depression 12 so as to be orthogonal to the center line L in FIG. The slit 1
7, as shown in FIG. 1C, the cut length M at the insertion-side end of the bottom surface of the depression 12 is shorter than the diameter of the depression 12. Also, the slit 17 is shown in FIG.
As shown in (d), the cut length N at the end opposite to the insertion side of the slit on the bottom surface of the groove 13 is substantially the same as the groove width (2d).

Next, the operation of the valve element 4 configured as described above will be described. Valve body 4 in catheter introducer 1
Is disposed between the base end of the main body 2 and the end cap 3. In a state of being tightly fitted to the inner peripheral surface of the end cap 3, the peripheral portion of the valve body 4 is pressed inward (toward the center),
Compressed. At this time, the slit 17 is tightly closed by the elastic force of the valve body 4 itself and the compressive force.

In this state, a small diameter (small diameter) is formed in the slit 17 from the plate surface 10 side, which is the insertion side surface, through the depression 12.
When the guide wire 20 is inserted, since the thin portion 15 has a small thickness, the insertion resistance is low and the thin portion 15 can be easily inserted. Since the portion of the valve portion 16 (hereinafter, referred to as a film) orthogonal to the groove width direction on the bottom surface of the groove portion 13 is thinner than the portion where the groove portion 13 is not formed, FIG.
As shown in (d), the guide wire 20 inserted through the slit 17 is turned up to the non-insertion side, and the restoring force of the film acts to press the side surface of the guide wire 20. For this reason,
As shown in FIG. 3 (b), the curled portion is the guide wire 2.
It elastically adheres to the 0 side surface.

The slit 17 is pushed and spread by the guide wire 20. The cut length N at the end opposite to the insertion side of the slit 17 is substantially the same as the groove width of the groove 13, and the cut end extending in the groove width direction is The cracks are prevented by the thick portions 18 where the grooves 13 are not formed. Since the cut length M at the insertion-side end of the slit 17 is longer than the diameter of the guide wire 20, at the insertion-side end, the surfaces facing each other (in the thin portion 15) in the slit 17 are aligned with the guide wire 20. Adheres to the side surface with elastic force.
Further, the close contact force acts on the side surface of the guide wire 20 by the compressive force acting from the peripheral portion of the valve body 4.

After the guide wire 20 has been pulled out,
The rolled-up membrane portion returns to the original state by the restoring force, and the slit 17 is formed by the elastic force of the valve body 4 itself and the compressive force.
Closed with close contact. Therefore, blood does not leak outside.

As shown in FIG. 4, a catheter 21 having a larger diameter than the guide wire 20 is inserted into the slit 17 through the recess 12 from the plate surface 10 which is the insertion side surface with respect to the valve body 4. When inserted, the groove 13 is formed over the entire length in the diameter direction of the valve body 4, so that in the groove 13, the entire valve body 4 easily bends toward the insertion direction with the groove 13 as a boundary. In other words, at the time of this bending, the groove 13 has a wider groove width near the plate surface 11, so that there is no restriction on this bending, and the groove 13 is easily bent. In addition, since the thickness of the thin portion 15 is small, the insertion resistance is low and the thin portion 15 can be easily inserted.

On the bottom surface of the groove 13, the side surface in the slit 17 of the valve portion 16 orthogonal to the groove width direction exerts a restoring force on the catheter 21 inserted in the slit 17 to press the side surface of the catheter 21. I do. For this reason, the side surface inside the slit 17 elastically adheres to the side surface of the catheter 21. The cut length N at the end opposite to the insertion side of the slit 17 is substantially the same as the groove width of the groove 13, and the cut end extending in the groove width direction is the thick portion 1 where the groove 13 is not formed.
8, the occurrence of cracks is prevented.

At the insertion-side end of the slit 17, the opposing surfaces (in the thin portion 15) in the slit 17 are brought into close contact with the side surface of the catheter 21 by elastic force. Further, the close contact force acts on the side surface of the catheter 21 also by the compressive force acting from the peripheral portion of the valve body 4.

Since the cut length M of the insertion side end of the slit 17 is shorter than the diameter of the catheter 21, a crack may be generated (see FIGS. 4B and 4C). 4B and 4C, the position indicated by the two-dot chain line is the position of the slit 17 before crack generation, and the position indicated by the solid line is the position in the case where a crack has occurred. FIG. 4 (b)
At the insertion side end of the slit 17, a crack is
4C shows a case where the crack has reached the periphery of the depression 12 at the insertion-side end of the slit 17.

As described above, even when the slit 17 is cracked in the width direction, the crack is restricted by the step with the annular thick portion 18 formed on the periphery of the depression 12, and the depression 17 The occurrence of cracks exceeding 12 is prevented.

With the above configuration, the present embodiment has the following effects. 1) In the present embodiment, a recessed portion 12 (recess) is formed on a plate surface 10 (insertion side surface) into which a guidewire or catheter is inserted, and a plate surface 11 (projection) from which the inserted guidewire or catheter projects. A groove 13 (groove) extending in the radial direction was formed on the side opposite to the insertion side. Also, the valve portion 16 is
The slit 17 is formed in the thickness direction of the thin portion 15 formed between the thin portion 15 and the concave portion 12, and the end of the slit 17 on the bottom surface of the groove portion 13 opposite to the insertion side has a thickness formed around the thin portion. It was formed so as to extend toward the meat portion 18.

As a result, an insertion object such as a guide wire or a catheter can be easily inserted and the insertion resistance can be reduced as compared with a plate-shaped valve element. 2) In the present embodiment, the groove 13 is formed in a straight line radially about the central axis O of the valve body 4. That is, since the groove portion 13 is formed over the entire length in the diameter direction of the valve body 4, the entire valve body 4 in the groove portion 13 easily bends toward the insertion direction with the groove portion 13 as a boundary. At the time of this bending, the groove 13 has a wider groove width near the plate surface 11.
There is no restriction on this bending, and it is easy to bend. together,
Since the thickness of the thin portion 15 is small, the insertion resistance is low, and an insertion object such as the guide wire 20 or a catheter can be easily inserted.

3) In the present embodiment, the cut length M of the insertion-side end of the slit 17 at the bottom surface of the depression 12 (recess) is shorter than the diameter of the depression 12. As a result, even if the slit 17 is cracked in the width direction,
The crack is restricted by a step with the annular thick portion formed on the periphery of the depression 12, and the generation of the crack beyond the depression 12 is prevented.

4) Further, in the present embodiment, the groove 13
Length N at the end opposite to the insertion side of the slit 17 in the bottom surface
Has a length substantially the same as the groove width 2d. As a result, slit 1
Although 7 is pushed and spread by the guide wire 20 and the catheter 21, the cut end extending in the groove width direction is restricted by the thick portion 18 where the groove 13 is not formed, so that generation of a crack can be prevented.

5) In this embodiment, the groove width of the groove 13 is shorter than the diameter of the depression 12, so that the diameter of the groove is smaller than the diameter of the depression 12, but the groove width is 2d.
When inserting an insertion object such as a catheter 21 larger than
The insertion resistance at that time can be reduced.

6) In the present embodiment, the slit 17 is
A tapered cut was formed from the insertion end to the non-insertion end. As a result, an insertion object such as the guidewire 20 or the catheter 21 can be easily inserted into the slit 17, and the insertion resistance of the insertion object can be reduced. (Second Embodiment) Next, as a second embodiment of the present invention,
A description will be given with reference to FIGS.

In the following embodiment, the first
The same components as those of the embodiment and the corresponding components are denoted by the same reference numerals, the description thereof will be omitted, and different portions will be mainly described.

In this embodiment, the groove 1 of the first embodiment is used.
Instead of providing the slit 3 and the slit 17 in a straight line, the groove 13 and the slit 17 are formed in a Y-shape around the central axis O of the valve body 4, and the groove 13 is formed at the opposite end of the slit 17 on the non-insertion side. The difference is that it is formed toward the thick portion 18 which is not formed.

Therefore, also in this embodiment, when an insertion object having a diameter larger than that of the guide wire 20 such as the catheter 21 is inserted from the plate surface 10 which is the insertion side surface through the depression 12, a Y-shape is formed. In the groove 13, the entire valve element 4 is easily bent toward the insertion direction with the groove 13 as a boundary.

When the catheter 21 is inserted (for convenience of explanation, the catheter has a cross section as a solid body in FIG. 7, but is actually tubular), the groove 13
Then, as shown in the drawing, the central portion swells against its elasticity, and spreads in the thick portion 18 in the direction of the arrow in the drawing. As described above, the valve element 4 is in close contact with the catheter 21 in a state where a compressive stress is applied, thereby preventing leakage of blood or the like.

With the above configuration, the present embodiment has the following effects. 1) The first embodiment refers to the groove 13 and the slit 1
7 is formed in a Y-shape instead of a straight line, but has the same effects as the effects 1) to 7) of the effects of the first embodiment.

Although the present invention has been described with reference to the preferred embodiments, the embodiments and the drawings are illustrative and do not limit the present invention. For example, the present invention may be realized as shown in FIGS.

(1) In the third embodiment shown in FIG. 8, the valve body 4 is arranged so that the groove 13 is arranged radially from the central axis O of the valve body 4.
Are arranged in a cross shape on the plate surface 11 side. The end of the slit 17 on the side opposite to the insertion side is formed toward the thick portion 18 where the groove 13 is not formed.

(2) In the fourth embodiment shown in FIG. 9, in the linearly arranged grooves 13 of the first embodiment, instead of keeping the groove width constant, the groove width is increased toward the periphery. Is gradually expanded. Conversely, the groove width may be narrower toward the periphery, and may be increased toward the center.

(3) In the fifth embodiment shown in FIG. 10, in the Y-shaped groove portion 13 of the second embodiment, instead of making the groove width constant, the groove width increases as the groove portion 13 moves toward the periphery. It is gradually expanded. Conversely, the groove width may be narrower toward the periphery, and may be increased toward the center.

(4) In the sixth embodiment shown in FIG. 11, in the cross-shaped grooves 13 of the third embodiment, instead of keeping the groove width constant, the groove width is increased toward the periphery. Is gradually expanded.

(5) FIGS. 12A and 12B
In the fourth embodiment, a peripheral thick part 22 having the same thickness as the thick part 18 is formed on the peripheral side of the groove 13, and the groove 13 is closed at the peripheral part.

(6) FIG. 12C shows that, in the first embodiment, a peripheral thick part 22 having the same thickness as the thick part 18 is formed on the peripheral side of the groove 13, and The part is closed.

(7) FIGS. 13A and 13B
In the fifth embodiment, a peripheral thick part 22 having the same thickness as the thick part 18 is formed on the peripheral side of the groove 13, and the groove 13 is closed at the peripheral part.

(8) FIG. 13C shows that, in the second embodiment, a peripheral thick part 22 having the same thickness as the thick part 18 is formed on the peripheral side of the groove part 13, The part is closed.

(9) FIGS. 14A and 14B
In the sixth embodiment (see FIG. 11), a peripheral thick portion 22 having the same thickness as the thick portion 18 is formed on the peripheral side of the groove 13, and the groove 13 is closed at the peripheral portion. Is what it is.

(10) FIG. 14C shows that in the third embodiment (see FIG. 8), a peripheral thick part 22 having the same thickness as the thick part 18 is formed on the peripheral side of the groove 13. , Groove 13
Is closed at the periphery.

(11) As shown in FIG. 15, in addition to the configuration of the first embodiment, a small hole having a diameter substantially equal to the width of the groove 13 is formed in the groove 13, and a slit 17 is formed in the small hole.
May be made to face the non-insertion side end. That is, the small hole 14 as the hole is located at the center of the bottom of the groove 13 (the valve body 4).
(The center of the groove 13) and is formed deeper than the depth of the bottom surface of the groove 13. In the small hole 14, the length of the groove 13 in the groove width direction is the same as the length of the groove 13.
The diameter is substantially the same as the diameter of the guide wire for guiding the expansion tubule and the like. In the small hole 14, the length of the groove 13 in the direction orthogonal to the groove width direction is slightly longer than the groove width.

(12) In each of the above embodiments, the depression 1
The depth from the second plate surface 10 is the same throughout the entire area, but it may be formed so that the center is the deepest and the depth decreases toward the periphery.

(13) In the above embodiments, the depression 1
The depth from the plate surface 10 was the same throughout the entire area, but it was formed in a double depression structure so as to form a step on the periphery, or in a triple depression structure to form one step. Alternatively, a shape in which two or more step portions are provided in the peripheral portion may be adopted.

(14) In each of the above embodiments, the grooves 13 are arranged radially around the central axis O of the valve body 4.
Groove portion 13 centered on a position offset from central axis O
May be formed radially, and the slit 17 may be formed to penetrate the plate surfaces 10 and 11 at the offset position.

The characteristic effects of the embodiments (1) to (11) will be described below. (1) FIG. 9, FIG. 10, FIG. 11, and FIG.
(B) In each embodiment of FIG. 14 (b), the degree of flexibility in the flexibility can be increased by gradually increasing the width of the groove toward the peripheral side, and the insertion object such as a catheter can be increased. When the is rotated, it can sufficiently bend following the rotation.

(2) FIGS. 12 (b), 12 (c), 1
3 (b), FIG. 13 (c), FIG. 14 (b), FIG. 14 (c)
In each of the above embodiments, the peripheral thick portion 22 having the same height as the thick portion 18 is provided on the peripheral side of the groove portion 13.

As a result, the groove extending from the central axis of the valve element to the peripheral portion is closed so as not to open at the peripheral portion, so that the peripheral thick portion 22 is thick. For,
When the valve body 4 is assembled in the main body 2 of the catheter introducer, the periphery thereof becomes thick, so that the periphery thereof can obtain a predetermined rigidity.

Then, when the end cap 3 of the catheter introducer 1 is sandwiched and fixed between the main body 2 and tightly fitted to the inner peripheral surface of the end cap 3, even compression from the peripheral portion of the valve body 4 is performed. The stress can be generated inward, and the force acting in the closing direction of the valve body 4 with respect to the slit 17 can be made more uniform as compared with the case where the peripheral portion thick portion 22 is not provided.

(3) According to the configuration of (11), the thickness of the portion is further reduced, and the insertion resistance can be further reduced. That is, when a small-diameter insertion object such as the guide wire 20 is inserted into the valve body,
Since the membrane of the valve section 16 orthogonal to the groove width direction is thinner than the groove section 13, the catheter 2 inserted through the slit 17
By (1), the membrane is turned to the non-insertion side, and the restoring force of the membrane acts to press the side of the catheter 21. For this reason, the rolled-up film elastically adheres to the side surface of the guide wire 20. At this time, the diameter of the small hole 14 is increased by the amount of the curl and the diameter of the catheter 21.

Therefore, the rolled-up membrane and the side surface inside the slit 17 elastically adhere to the side surface of the catheter 21. The cut length N at the end opposite to the insertion side of the slit 17 is the groove 1
3 is substantially the same length as the groove width, and the cut end extending in the groove width direction is regulated by the thick portion 18 in which the groove portion 13 is not formed, thereby preventing the occurrence of cracks. Thus, the small hole 1
Since the membrane in 4 easily adheres to the inserted object, leakage of blood or the like can be prevented.

Other technical ideas grasped by the above embodiments will be described below together with their effects. (1) The medical valve element according to any one of claims 1 to 11, wherein a width of the groove is constant in a radial direction. When the width of the groove is constant, the inserted object is inserted into the slit, and when the valve element bends through the groove,
It can bend at a portion along the groove.

(2) The medical valve element according to any one of claims 1 to 11, wherein the groove width of the groove is gradually increased toward the periphery of the valve element. By gradually increasing the width of the groove toward the circumferential side, the degree of flexibility of the flexibility can be increased, and when the catheter is rotated, the catheter sufficiently bends following the rotation. be able to.

[0082]

According to the first aspect of the present invention, the insertion resistance is small when the catheter is inserted, the operation can be easily performed, and the leakage of blood or the like occurs when the inserted object such as the guide wire or the catheter is inserted. Therefore, there is an effect that the structure is simple and the cost can be reduced.

According to the second aspect of the present invention, in addition to the effect of the first aspect, when the insertion object is inserted into the slit, the thinned groove is easily bent and the insertion resistance can be further reduced. According to the third aspect of the present invention, even if the insertion side end of the slit has a crack in the groove width direction, the crack is restricted by the thick portion formed on the peripheral edge of the recess, and the recess is formed. The generation of an excessive crack is prevented.

According to the fourth aspect of the present invention, the cut length at the end of the groove on the side opposite to the insertion side of the slit is substantially the same as the groove width. As a result, the slit is pushed open by the insertion object. The cut end extending in the direction is restricted to a thick portion where no groove is formed, thereby preventing the occurrence of cracks.

According to the fifth aspect of the present invention, since the hole is formed in the groove and the end opposite to the insertion side of the slit faces, the thickness of the portion is further reduced, and the insertion resistance can be further reduced.

According to the sixth aspect of the present invention, when inserting an object that is smaller in diameter than the recess but larger than the groove width,
The insertion resistance at that time can be reduced. According to the invention of claim 7, since the slit is formed by cutting in a tapered shape from the insertion side end to the non-insertion side end,
The inserted object can be easily inserted into the slit, and the insertion resistance of the inserted object can be reduced.

According to the eighth aspect of the present invention, the insertion resistance of the insertion object can be reduced in the Y-shaped portion. According to the ninth aspect, the insertion resistance of the insertion object can be reduced in the portion formed in a straight line.

According to the tenth aspect of the present invention, since the groove is formed in a Y-shape centered on a predetermined position of the valve body, when the inserted object is inserted into the slit, the groove becomes thinner. Are easily bent, and the insertion resistance can be further reduced.

According to the eleventh aspect of the present invention, the groove extending from the central axis of the valve body to the peripheral portion is closed so as not to open at the peripheral portion, so that the closed portion has a large thickness,
When assembling this medical valve body to the catheter introducer, the periphery thereof is made thick, so that the peripheral portion thereof can obtain a predetermined rigidity.

[Brief description of the drawings]

FIG. 1A is a perspective view of the valve element seen from the insertion side, and FIG.
Is a perspective view from the side opposite to the insertion side, (c) is a plan view of the valve body,
(D) is a bottom view of the valve body.

FIG. 2 is a sectional view of the valve body of the first embodiment taken along line XX of FIG. 1 (c).

FIG. 3A is a bottom view of a valve body before a guide wire is inserted,
(B) is a plan view when a guidewire is inserted, (c) is an end view taken along the line YY before the guidewire is inserted, and (d) is a cross-sectional view along the line ZZ when the guidewire is inserted.

4A is a perspective view of a valve body showing a state before a catheter is inserted, FIG. 4B is a cross-sectional view of the valve body showing a state of a slit in the first embodiment, and FIG. Sectional drawing of the valve body which shows FIG.

FIG. 5A is a plan view of a valve body according to a second embodiment. (B)
5A is a sectional view taken along the line 5b-5b of FIG. 5A, and FIG.

FIG. 6A is a perspective view of a valve element viewed from an insertion side of a second embodiment, and FIG. 6B is a perspective view of the valve element viewed from a non-insertion side.

FIG. 7 is an explanatory view showing the operation of the second embodiment.

FIG. 8 shows a valve element according to a third embodiment, wherein (a) is a plan view,
(B) is an 8b-8b line center sectional view of (a), (c) is a bottom view.

FIG. 9 shows a valve element according to a fourth embodiment, wherein (a) is a plan view,
(B) is a 9b-9b line center sectional view of (a), (c) is a bottom view.

10A and 10B show a valve body according to a fifth embodiment, wherein FIG. 10A is a plan view, FIG. 10B is a central sectional view, and FIG. 10C is a bottom view.

11A and 11B show a valve body according to a sixth embodiment, wherein FIG. 11A is a plan view, FIG. 11B is a central sectional view, and FIG. 11C is a bottom view.

12A is a plan view of the seventh embodiment, FIG. 12B is a bottom view of the same, and FIG. 12C is a bottom view of a modification of the seventh embodiment.

13A is a plan view of the eighth embodiment, FIG. 13B is a bottom view of the same, and FIG. 13C is a bottom view of a modification of the eighth embodiment.

14A is a plan view of the ninth embodiment, FIG. 14B is a bottom view of the same, and FIG. 14C is a bottom view of a modification of the ninth embodiment.

15A is a perspective view of another embodiment viewed from the insertion side of the valve body, FIG. 15B is a perspective view of the embodiment viewed from the opposite side to the insertion side, and FIG.
Is a plan view of the valve body, and (d) is a bottom view of the valve body.

FIG. 16 is a cross-sectional view of a catheter introducer.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Catheter introducer, 4 ... Valve element (constituting a medical valve element), 10 ... Plate surface, 11 ... Plate surface, 12 ... Depressed part (constituting a concave part), 13 ... Groove part (constituting a groove) ), 14 ... Small hole (constituting a hole part) 15 ... Thin part, 16 ... Valve part, 17 ... Slit, 18 ... Thick part, 20
... a guide wire, 21 ... a catheter.

Claims (11)

[Claims] 1. A medical valve body made of a flexible elastic material, comprising a valve portion formed so that an insertion object can be inserted therein, and a concave portion is formed on an insertion side surface into which the insertion object is inserted. A groove extending in a radial direction is formed on a side opposite to the insertion side from which the inserted object projects, and a slit is formed in a thickness direction of a thin portion formed between the groove and the recess in the valve portion. The medical valve body is characterized in that a non-insertion side end of the slit on the bottom surface of the groove is formed to extend toward a thick portion formed around the thin portion. 2. The medical valve element according to claim 1, wherein a plurality of grooves are formed radially around a predetermined position of the valve element. 3. The medical valve body according to claim 1, wherein a cut length of an insertion-side end of the slit on a bottom surface of the concave portion is shorter than a diameter of the concave portion. . 4. The slit according to claim 1, wherein a cut length of an end portion of the slit on a side opposite to the insertion side of the slit is substantially equal to a groove width. Item 14. The medical valve element according to Item. 5. The slot according to claim 1, wherein a hole having a diameter substantially equal to a width of the groove is formed in the groove, and an end opposite to the insertion side of the slit faces the hole. The medical valve element according to any one of the preceding claims. 6. The medical valve element according to claim 1, wherein a width of the groove is shorter than a diameter of the recess. 7. The slit is inserted from an insertion end thereof.
The medical valve body according to any one of claims 1 to 6, wherein the medical valve body is formed so as to be cut in a tapered shape up to the opposite end of the insertion side. 8. The medical valve element according to claim 1, wherein the slit is formed in a Y-shape. 9. The medical valve element according to claim 1, wherein the slit is formed in a straight line. 10. The medical valve element according to claim 1, wherein the groove is formed in a Y-shape around a predetermined position of the valve element. 11. The valve according to claim 1, wherein the groove extending from the center of the valve body to the peripheral portion is closed so as not to open at the peripheral portion. The medical valve element according to claim 1.