WO2006059540A1

WO2006059540A1 - Valve body

Info

Publication number: WO2006059540A1
Application number: PCT/JP2005/021655
Authority: WO
Inventors: Takayuki Mori; Ryoichi Soba; Shigeki Numata; Hiroshi Yagi
Original assignee: Terumo Kabushiki Kaisha
Priority date: 2004-12-01
Filing date: 2005-11-25
Publication date: 2006-06-08

Abstract

A valve body is made of an elastic material and has an opening and closing section having slits that are opened and closed as an elongate member is inserted into and removed from the valve body. The opening and closing section of the valve body has a first slit running from the inside of the valve body only to the top of the valve body, a second slit running from the inside only to the bottom surface of the valve body and intersecting, in the inside, the first slit, and at least one auxiliary slit running from the inside only to the bottom surface and intersecting the second slit at a position away from the central portion of the second slit.

Description

Specification

Disc

Technical field

[0001] The present invention relates to a valve body having an opening / closing section composed of a plurality of slits that open and close when a long member such as a catheter, a guide wire, or a dilator is inserted or removed.

Background art

[0002] An introducer is used when a long member used for medical treatment such as a catheter or a guide wire is introduced into a living body. As this introducer, for example,

What is described in Japanese Patent Publication No. 2-949 is known.

[0003] This introducer has a tubular hub, a cap attached to one end of the hub, a sheath having a sheath tube connected to the other end of the hub, and introduction of the sheath into the living body. It is composed of a dilator that is inserted into the sheath and used for easy

. The cap is provided with an opening communicating with the hollow portion of the hub. A disc-shaped valve body is installed so as to cover the opening, that is, to maintain the liquid-tight state of the hollow portion of the hub.

[0004] The valve body is formed with two slits that cross in a cross shape. Both slits are in an open state when the long member (tubular body) is inserted into the sheath, and are in a closed state when the long member is removed.

[0005] However, when such a valve element is in a state in which a long member is inserted for a long period of time, or when a long member is frequently inserted and removed repeatedly, the slit is split. There is a fear.

[0006] When tearing occurs in the slit, even if the long member is removed and both slits are closed, the liquid tightness of the valve body (slit) may be reduced (damaged) due to the tearing. There was a problem.

Disclosure of the invention [0007] An object of the present invention is to provide a valve body in which a slit does not tear when a long member is inserted.

In order to achieve the above object, the present invention provides:

A valve body made of an elastic material and having an opening / closing portion composed of a plurality of slits that open and close as the long member is inserted and removed.

The opening / closing part is

An internal force of the valve body, a first slit that reaches only the top surface of the valve body;

A second slit that reaches only from the inside to the bottom surface of the valve body and intersects the first slit in the inside;

The internal force is at least one auxiliary slit that reaches only the bottom surface and intersects the second slit at a position away from the central force of the second slit.

[0008] Thereby, when inserting the long member, the slit does not tear.

In order to achieve the above object, the present invention provides:

The opening / closing part is

The second slit is a valve body characterized by having an auxiliary slit branched into a plurality at the end or in the middle thereof.

[0010] Thereby, when inserting the long member, the slit does not tear.

[0011] In the valve body of the present invention, it is preferable that two auxiliary slits are provided.

[0012] With this, when the long member is inserted into the valve body, the auxiliary slit is opened, and the internal stress acting near the center of the second slit can be dispersed (relaxed). It can prevent tearing (turtle cracking).

[0013] In the valve body of the present invention, the two auxiliary slits face each other toward the bottom surface of the valve body. It is shaped to approach the heel!

[0014] Thereby, when the long member is inserted into the valve body, the internal stress acting in the vicinity of the center of the second slit is suitably dispersed, so that the second slit is reliably prevented from being cracked. can do.

[0015] Further, in the valve body of the present invention, the two auxiliary slits face each other toward the bottom surface of the valve body.

V is formed so as to be spaced apart!

[0016] Thereby, when the long member is inserted into the valve body, the internal stress acting near the center of the second slit is suitably dispersed, so that the second slit is reliably prevented from being cracked. can do.

[0017] In the valve body of the present invention, it is preferable that the auxiliary slits are provided so as to be substantially equidistant through the central portion! /.

[0018] With this, when the long member is inserted into the valve body, the auxiliary slit is opened, and the internal stress acting near the center of the second slit can be dispersed (relaxed). It can prevent tearing (turtle cracking).

[0019] In the valve body of the present invention, it is preferable that the auxiliary slit has a single letter shape in plan view.

[0020] Thereby, the auxiliary slit can have a simple shape (configuration), and thus each auxiliary slit (opening / closing portion) can be opened and closed easily and reliably.

[0021] Further, in the valve body of the present invention, it is preferable that the auxiliary slit has a V shape in a plan view.

[0022] Thus, the auxiliary slit is formed so as to be inclined with respect to the opening direction of the second slit (in the inserted state) when the elongated member is inserted, so that the auxiliary slit is excessive in the inserted state. Can be prevented.

[0023] Further, in the valve body of the present invention, the auxiliary slit intersects the second slit at a valley portion in the V shape, and the valley portion is located on the center portion side. preferable.

[0024] Thereby, the auxiliary slits in the inserted state can be opened equally with respect to each other with respect to the second slit.

[0025] In the valve body of the present invention, the auxiliary slit has a U-shape in plan view. It is preferable.

[0026] Thereby, the auxiliary slit is formed so as to be inclined with respect to the opening direction of the second slit (in the inserted state) when the long member is inserted, and therefore the auxiliary slit is excessive in the inserted state. Can be prevented.

[0027] Further, in the valve body of the present invention, the auxiliary slit intersects the second slit at a valley portion in the U-shape, and the valley portion is located on the center portion side. preferable.

[0028] Thereby, the auxiliary slits in the inserted state can be opened equally with respect to each other with respect to the second slit.

[0029] In the valve body of the present invention, it is preferable that the depth of the auxiliary slit with respect to the valve body is substantially equal to the depth of the second slit with respect to the valve body.

[0030] With this, when the long member is inserted into the valve body, the auxiliary slit is opened, and the internal stress acting near the center of the second slit can be suitably dispersed, and thus the second slit It is possible to reliably prevent cracks from occurring.

[0031] In the valve body of the present invention, it is preferable that the auxiliary slit has a portion whose depth changes with respect to a longitudinal direction of the auxiliary slit.

[0032] With this, when the long member is inserted into the valve body, the auxiliary slit is opened, and the internal stress acting near the center of the second slit can be suitably dispersed, and thus the second slit It is possible to reliably prevent cracks from occurring.

[0033] In the valve body of the present invention, it is preferable that at least one of the first slit and the second slit has a single letter shape in plan view.

Thus, the slit can be formed into a simple shape (configuration), and thus the slit can be opened and closed easily and reliably.

[0035] In the valve body of the present invention, it is preferable that the elongated member is a dilator, a catheter, or a guide mechanism.

[0036] Thereby, the elongated member can be introduced into the living body.

Brief Description of Drawings

FIG. 1 is a partial longitudinal sectional view showing an introducer having a valve body of the present invention.

FIG. 2 is a perspective view showing a first embodiment of the valve body of the present invention. FIG. 3 is a plan view of the valve body shown in FIG. 2.

FIG. 4 is a bottom view of the valve body shown in FIG. 2.

FIG. 5 is a plan view showing a state in which a long member is passed through the valve body shown in FIG. 2.

6 is a bottom view showing a state in which a long member is passed through the valve body shown in FIG. 2. FIG.

FIG. 7 is a side view showing a second embodiment of the valve body of the present invention.

FIG. 8 is a side view showing a third embodiment of the valve body of the present invention.

FIG. 9 is a bottom view showing a fourth embodiment of the valve body of the present invention.

FIG. 10 is a bottom view showing a fifth embodiment of the valve body of the present invention.

FIG. 11 is a bottom view showing a sixth embodiment of the valve body of the present invention.

FIG. 12 is a bottom view showing a seventh embodiment of the valve body of the present invention.

FIG. 13 is a perspective view showing an eighth embodiment of the valve body of the present invention.

FIG. 14 is a perspective view showing a ninth embodiment of the valve body of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the valve body of the present invention will be described in detail based on preferred embodiments shown in the accompanying drawings.

FIG. 1 is a partial longitudinal sectional view showing an introducer having the valve body of the present invention, FIG. 2 is a perspective view showing the first embodiment of the valve body of the present invention, and FIG. 3 is shown in FIG. FIG. 4 is a bottom view of the valve body shown in FIG. 2, FIG. 5 is a plan view showing a state in which a long member is inserted into the valve body shown in FIG. The figure is a bottom view showing a state in which a long member is passed through the valve body shown in FIG. In the following, for convenience of explanation, the upper side in FIGS. 1 and 2 will be described as “upper” or “base end”, and the lower side will be described as “lower” or “tip”.

[0040] An introducer 1 shown in FIG. 1 is used to introduce a long member used for medical treatment such as a guide wire or a catheter into a living body (for example, a blood vessel or the like). .

[0041] The introducer 1 includes a hub 2, a tubular sheath tube 4 fixed to the distal end side of the hub 2, a sheath 7 having a sealing means 6, and introduction of the sheath 7 into the living body. It is composed of a dilator (expansion tube) 10 that is inserted into the sheath 7 for easy use.

[0042] The hub 2 is composed of a tubular body. [0043] On the outer periphery of the hub 2, a side port (connecting portion) 21 protruding sideways is provided. The side port 21 has a tubular shape, and a hollow portion (inside) 211 communicates with the inside of the hub 2. One end of a flexible tube 8 made of, for example, polyvinyl chloride / vinyl is connected to the side port 21 in a liquid-tight manner.

[0044] The sheath tube 4 is a member introduced into the living body, and is formed of a thin-walled tubular member. The sheath tube 4 has a proximal end portion fitted into a distal end portion of the hub 2.

[0045] A sealing means 6 for sealing the inside of the hub 2 is provided at the base end portion of the hub 2.

[0046] The sealing means 6 is a dilator (expansion tube) 10 or a catheter, or a valve body 61 through which a guide wire can pass, and a bottomed cylindrical shape that supports and fixes the valve body 61 to the sleeve 2 And the lid member 64.

The lid member 64 is fitted and attached to the base end outer peripheral portion 22 of the hub 2. At the bottom 641 of the lid member 64, an insertion port 65 through which the dilator 10, catheter or guide wire can be passed is formed.

[0048] Here, the dilator 10 will be described.

[0049] The dilator 10 is composed of a flexible tube (tube). The dilator 10 is inserted into the sheath 7 and inserted (introduced) into the living body while being fixed to the sheath 7. Further, in the dilator 10, for example, in order to facilitate introduction into a blood vessel, the tip portion 101 of the dilator 10 is reduced in diameter by directing the tip.

[0050] Such a dilator 10 is removed from the sheath 7 after the sheath tube 4 is inserted into the living body (blood vessel). Thereafter, a catheter or guide wire is inserted through the sputum inlet 65.

[0051] As described above, the sealing means 6 has the valve body 61.

As shown in FIG. 2, the valve body 61 is formed of an elastic body having a circular film shape (disk shape). The valve body 61 is fixed in a liquid-tight manner to the hub 2 by being sandwiched between the base end face 23 of the hub 2 and the bottom portion 641 of the lid member 64 (see FIG. 1).

The valve body 61 has an opening / closing part 66 that opens and closes as the dilator 10 is inserted and removed (see FIGS. 3 to 6).

[0054] As shown in FIG. 2, the opening / closing portion 66 includes a first slit 62, a second slit 63, and two complementary slits. It consists of auxiliary slits 67 and 67.

The first slit 62 is formed so that the internal force of the valve body 61 also reaches only the upper surface (top surface) 68 of the valve body 61. The first slit 62 has a single letter shape in plan view (see FIG. 3). As a result, the first slit 62 can have a simple shape (configuration), and thus the first slit 62 (opening / closing portion 66) can be opened and closed easily and reliably.

[0056] The depth of the first slit 62 is not particularly limited. For example, about 40 to 90% of the thickness of the valve body 61 is preferable, and about 40 to 70% is more preferable.

The second slit 63 is formed so that the internal force of the valve body 61 can reach only the lower surface (bottom surface) 69 of the valve body 61. The second slit 63 has a single letter shape in plan view (see FIG. 4). As a result, the second slit 63 can have a simple shape (configuration), and therefore the second slit 63 (opening / closing portion 66) can be easily and reliably opened and closed.

[0058] The depth of the second slit 63 is not particularly limited. For example, the depth of the valve body 61 is 40-9.

About 0% is preferable. About 40 to 70% is more preferable.

In addition, the first slit 62 and the second slit 63 as described above partially intersect with each other inside the valve body 61. In the configuration shown in the figure, the slits 62 and 63 intersect with each other in a cross shape, that is, the crossing angle between the slits 62 and 63 is 90 °. The crossing angle is not limited to 90 °.

[0060] The length L (see Fig. 2) of the intersection between the first slit 62 and the second slit 63 is not particularly limited, but is, for example, 20 to 50% of the thickness of the valve body 61 About 30 to 40% is preferable.

[0061] The two auxiliary slits 67 and 67 reach only the lower surface 69 from the inside of the valve body 61, respectively. The auxiliary slits 67 and 67 are formed at substantially the same distance from the central portion 631 of the second slit 63 and intersect only the second slit 63 at that position (FIG. 2, (See Figure 4).

In the illustrated configuration, each auxiliary slit 67 and the second slit 63 intersect with each other in a cross shape! That is, the intersection angle between each auxiliary slit 67 and the second slit 63 is: 90 ° . In other words, both auxiliary slits 67 and 67 are formed so as to be parallel to the first slit 62 and intersect the second slit 63.

[0063] By providing the auxiliary slit 67 having the above-described configuration, when the dilator 10 is inserted into the valve body 61, each auxiliary slit 67 opens and works near the central portion 631 of the second slit 63. It is possible to disperse (relax) the partial stress, and thus it is possible to prevent the second slit 63 (valve element 61) from cracking (cracking) (see FIG. 6).

Therefore, for example, even if the state in which the dilator 10 is inserted through the sheath 7 (the state shown in FIG. 1; hereinafter, this state is referred to as “assembled state”) is maintained for a long time, Since tearing of 61 is prevented, the sheath 7 and the dilator 10 can be shipped (sold) in an assembled state.

[0065] When the dilator 10 is inserted into the valve body 61 (opening / closing part 66), not only the first slit 62 and the second slit 63 but also the auxiliary slits 67 are opened (see FIG. 6). As a result, the dilator 10 can easily pass through the opening / closing portion 66, that is, the sliding resistance between the outer peripheral surface 102 of the dilator 10 and the valve body 61 is reduced (reduced).

[0066] As shown in FIG. 4, each auxiliary slit 67 has a single letter shape in plan view. As a result, each auxiliary slit 67 can have a simple shape (configuration), and thus each auxiliary slit 67 (opening / closing portion 66) can be opened and closed easily and reliably.

[0067] Note that, as shown in FIG. 2, the depth of the auxiliary slit 67 is preferably substantially the same as the depth of the second slit 63, but is not limited to this, for example, the second slit 63 It may be deeper than the depth of 63 or shallower than the depth of the second slit 63. When the depth of the auxiliary slit 67 is substantially equal to the depth of the second slit 63, the internal stress can be suitably dispersed, and thus the second slit 63 is torn (cracked). Can be surely prevented.

Further, as shown in FIG. 2, each auxiliary slit 67 is formed such that both end portions 678 and 678 are equal in length from the intersection 677 with the second slit 63. However, the length is not limited to this, and the lengths may be different.

[0069] The constituent material of the valve body 61 is not particularly limited. For example, natural rubber, isoprene rubber, silicone rubber, urethane rubber, styrene butadiene rubber, fluorine rubber, Examples include elastic materials such as various synthetic rubbers such as krill rubber, various thermoplastic elastomers such as polyamide and polyester.

[0070] By using the valve body 61 having such a configuration, liquid tightness is ensured not only when the dilator 10 is not inserted (inserted) into the valve body 61 but also when the dilator 10 is inserted. It is possible to reliably prevent leakage of the liquid (for example, blood) filled in the hub 2.

[0071] As shown in FIGS. 5 and 6, when the dilator 10 is inserted, the first slit 6

Since the second and second slits 63 are in close contact with the outer peripheral surface 102 of the dilator 10 from different directions and slide, the liquid tightness is ensured even when the dilator 10 is inserted through the valve body 61. Leakage of blood etc. is effectively prevented.

Further, as shown in FIGS. 3 and 4, the dilator 10 is replaced with a valve body 61 (introducer 1

) When the force is also removed, the valve body 61 is instantly restored to its original shape due to its elasticity, that is, the first slit 62, the second slit 63 and the auxiliary slit 67 are instantly closed and liquid tight. To prevent liquid leakage.

[0073] In the introducer 1, the valve body 61 is arranged so that the surface (the lower surface 69) on which the auxiliary slit 67 is formed is located on the base end side. The valve body 61 may be arranged so that the formed surface is located on the tip side.

[0074] Further, what is inserted into the sheath 7 via the valve body 61 is not limited to the dilator 10, but may be a catheter or a guide wire, for example.

[0075] <Second Embodiment>

Hereinafter, the second embodiment of the valve body of the present invention will be described with reference to this figure, but the description will focus on the differences from the above-described embodiment, and the description of the same matters will be omitted.

[0077] This embodiment is the same as the first embodiment except that the formation state of the auxiliary slits is different.

As shown in FIG. 7, the two auxiliary slits 67A and 67A are inclined with respect to the first slit 62, that is, approach each other toward the base end side (lower surface 69 side). It is formed as follows. As a result, the base end side of each auxiliary slit 67A is moved to the central portion 631 of the second slit 63. Therefore, when the dilator 10 is inserted (hereinafter, this state is referred to as “inserted state”), the internal stress near the base end portion (lower surface 69) of the central portion 631 is preferably dispersed. Therefore, it is possible to reliably prevent the second slit 63 from tearing.

[0079] The inclination angle of each auxiliary slit 67A with respect to the first slit 62 (the angle indicated by Θ in Fig. 7) is not particularly limited, and is preferably a force of 30 to 70 °, for example. More preferably, it is ˜60 °.

[0080] Further, the two inclination angles Θ are not limited to being equivalent, and may be different from each other.

[0081] <Third Embodiment>

Hereinafter, the third embodiment of the valve body of the present invention will be described with reference to this figure, but the description will focus on differences from the above-described embodiment, and the description of the same matters will be omitted.

[0083] This embodiment is the same as the first embodiment except that the formation state of the auxiliary slits is different.

[0084] As shown in FIG. 8, the two auxiliary slits 67B and 67B are inclined with respect to the first slit 62, that is, separated from each other toward the base end side (the lower surface 69 side). It is formed as follows. As a result, the distance between the auxiliary slits 67B and 67B is increased (widened) along the insertion direction of the dilator 10 (the direction from the upper surface 68 to the lower surface 69). Become.

[0085] Note that the angle of inclination of each auxiliary slit 67B with respect to the first slit 62 (indicated as Θ in FIG. 8).

2 angle) is not particularly limited, and is, for example, preferably a force of 30 to 70 °, and more preferably 40 to 60 °.

[0086] Further, the two inclination angles Θ are not limited to being equal, but may be different from each other.

2

[0087] <Fourth embodiment>

Hereinafter, the fourth embodiment of the valve body of the present invention will be described with reference to this figure, but the description will focus on the differences from the above-described embodiment, and the description of the same matters will be omitted. This embodiment is the same as the first embodiment except that the shape of the auxiliary slit is different.

[0090] As shown in Fig. 9, each auxiliary slit 67C has a V-shape in plan view. Accordingly, each auxiliary slit 67C is formed so as to be inclined with respect to the direction in which the second slit 63 opens when the dilator 10 is inserted (the vertical direction in FIG. 9). It is possible to prevent the auxiliary slit 67C from opening excessively.

[0091] Each auxiliary slit 67C is a valley 671 in the V-shape, intersects with the second slit 63, and the valley 671 is located on the center 631 side of the second slit 63. . Thereby, each of the auxiliary slits 67C in the inserted state can open the upper part 672 and the lower part 673 in the figure equally with respect to the second slit 63.

[0092] <Fifth Embodiment>

Hereinafter, the fifth embodiment of the valve body of the present invention will be described with reference to this figure, but the description will focus on the differences from the above-described embodiment, and the description of the same matters will be omitted.

[0094] The present embodiment is the same as the fourth embodiment except that the formation position of the auxiliary slit is different.

As shown in FIG. 10, the valley 671 of each auxiliary slit 67 D intersects the end 63 2 of the second slit 63. That is, the second slit 63 has auxiliary slits 67D and 67D branched into a plurality (two in the present embodiment) at the end 632 (or halfway). As a result, both end portions 632 and 632 can be largely opened in the inserted state, and thus the dilator 10 can easily insert the valve body 61.

[0096] In the fourth embodiment, it can also be said that the auxiliary slit is formed so as to branch into three from the end of the second slit.

[0097] <Sixth Embodiment>

Hereinafter, the sixth embodiment of the valve body of the present invention will be described with reference to this figure. However, the difference from the above-described embodiment will be mainly described, and description of similar matters will be omitted.

[0099] This embodiment is the same as the first embodiment except that the shape of the auxiliary slit is different. is there.

[0100] As shown in Fig. 11, each auxiliary slit 67E has a U-shape in plan view. Thus, each auxiliary slit 67E is formed so as to be inclined with respect to the direction in which the second slit 63 opens (the vertical direction in FIG. 9) when the dilator 10 is inserted. Each auxiliary slit 67E can be prevented from opening excessively.

[0101] Each auxiliary slit 67E is a valley 674 in the U-shape, intersects the second slit 63, and the valley 674 is located on the center 631 side of the second slit 63. . As a result, each of the auxiliary slits 67E in the inserted state can open the upper part 675 and the lower part 676 in the figure equally with respect to the second slit 63.

[0102] <Seventh embodiment>

[0103] Hereinafter, the seventh embodiment of the valve body of the present invention will be described with reference to this figure, but the description will focus on differences from the above-described embodiment, and the description of the same matters will be omitted.

[0104] The present embodiment is the same as the sixth embodiment except that the formation positions of the auxiliary slits are different.

As shown in FIG. 12, the valley 674 of each auxiliary slit 67 F intersects the end 63 2 of the second slit 63. That is, the second slit 63 has auxiliary slits 67F and 67F branched into a plurality (two in the present embodiment) at the end 632 (or halfway). As a result, both end portions 632 and 632 can be largely opened in the inserted state, and thus the dilator 10 can easily insert the valve body 61.

In the sixth embodiment, it can also be said that each auxiliary slit is formed so as to be branched into three end forces of the second slit.

Hereinafter, the eighth embodiment of the valve body of the present invention will be described with reference to this drawing. However, the description will focus on the differences from the above-described embodiment, and the description of the same matters will be omitted.

This embodiment is the same as the first embodiment except that the shape of the auxiliary slit is different. [0110] As shown in FIG. 13, the depth of each auxiliary slit 67G changes with respect to the longitudinal direction of the auxiliary slit, that is, the depth increases from the end 678 toward the intersection 677. Caro (gradual increase). In the illustrated configuration, the depth of each auxiliary slit 67G is almost zero at the end 678.

[0111] The auxiliary slit 67G having such a configuration can favorably disperse the internal stress in the inserted state, thereby reliably preventing the second slit 63 from cracking (cracking). That's right.

In the present embodiment, the maximum depth of each auxiliary slit 67G is substantially equal to the depth of the second slit 63.

[0113] <Ninth embodiment>

Hereinafter, the ninth embodiment of the valve body of the present invention will be described with reference to this figure, but the description will focus on the differences from the above-described embodiment, and the description of the same matters will be omitted.

[0115] The present embodiment is the same as the first embodiment except that the shape of the auxiliary slit is different.

As shown in FIG. 14, the depth of each auxiliary slit 67H changes with respect to the longitudinal direction of the auxiliary slit, that is, the depth gradually decreases partially.

[0117] With the auxiliary slit 67H having such a configuration, the internal stress can be suitably dispersed in the inserted state, and thus it is possible to reliably prevent the second slit 63 from being cracked. That's right.

[0118] Although the illustrated embodiment of the valve body of the present invention has been described above, the present invention is not limited to this, and each part constituting the valve body may be any arbitrary one that can exhibit the same function. It can be replaced with that of the configuration. Moreover, arbitrary components may be added.

[0119] Further, the valve body of the present invention may be a combination of any two or more configurations (features) of the above embodiments! /.

[0120] For example, the auxiliary slits of the fourth embodiment may be inclined like the auxiliary slits of the second embodiment or the third embodiment, respectively.

[0121] Further, the auxiliary slits of the fifth embodiment are respectively the second embodiment or the It may be inclined like the auxiliary slit of the third embodiment.

[0122] In addition, the auxiliary slit of the fifth embodiment may have a single letter shape in plan view like the auxiliary slit of the first embodiment.

[0123] Further, what is inserted into and removed from the valve body is not limited to a hollow body such as a pipe body (dilator), and may be, for example, a solid body.

[0124] The number of auxiliary slits formed is not limited to two, and may be one or three or more, for example.

[0125] Further, the first slit and the second slit are not limited to a single letter shape in plan view, and for example, only the first slit may be a single letter shape. However, only the second slit may have a single letter shape.

Example

Next, specific examples of the valve body of the present invention will be described.

[0127] 1. Fabrication of sheath (introducer)

(Example 1)

A valve body shown in FIGS. 2 to 4 was produced using silicone rubber, and a sheath (introducer) shown in FIG. 1 was produced by mounting this valve body.

[0128] (Example 2)

The valve body shown in FIG. 9 was produced using silicone rubber, and the sheath shown in FIG. 1 was produced by mounting this valve body.

[0129] (Comparative example)

Except for omitting the auxiliary slit, a valve body similar to that of Example 1 was prepared, and this valve body was attached to manufacture the sheath shown in FIG.

[0130] 2. Evaluation

Dilators were inserted into the sheaths produced in each of the examples and comparative examples, and heated in an oven in the state shown in FIG. The heating conditions were 60 ° C x 13 hours.

[0131] After the heating was completed, the tubular body introduction device force dilator produced in each of the examples and the comparative examples was removed, and the valve body was removed. Then, for each valve body, the state of the second slit is set. It was confirmed visually.

[0132] As a result, in each of the valve bodies of each of the examples, the second slit was not torn. O

[0133] On the other hand, in the comparative valve body, a clear tear was observed in the second slit.

Industrial applicability

[0134] The valve body of the present invention is a valve body made of an elastic material and having an opening / closing part made up of a plurality of slits that open and close as the long member is inserted and removed. Internal force of the valve body A first slit that reaches only the top surface of the valve body, and a second slit that reaches only the bottom surface of the valve body from the inside and intersects the first slit in the inside And at least one auxiliary slit that reaches only the bottom surface from the inside and intersects the second slit at a position away from the central force of the second slit. Therefore, even if the long member is inserted for a long period of time or the insertion / extraction of the long member is repeated frequently, it is possible to prevent the slits from tearing. Further, for example, the valve body of the present invention can be used (installed) in a sheath of an introducer that introduces a long member used for medical treatment such as a force tape or a guide wire into a living body. Therefore, the valve body of the present invention has industrial applicability.

Claims

The scope of the claims

[1] A valve body having an opening and closing portion made of an elastic material and made up of a plurality of slits that open and close as the long member is inserted and removed.

The opening / closing part is

The valve body having at least one auxiliary slit that reaches only the bottom surface and intersects the second slit at a position away from the central force of the second slit.

[2] A valve body having an opening and closing portion made of an elastic material and made up of a plurality of slits that open and close as the long member is inserted and removed.

The opening / closing part is

The valve body, wherein the second slit has an auxiliary slit branched into a plurality at an end portion or in the middle thereof.

[3] The valve body according to claim 1 or 2, wherein two auxiliary slits are provided.

[4] The valve body according to claim 3, wherein the two auxiliary slits are formed so as to approach each other toward the bottom surface of the valve body.

[5] The valve body according to claim 3, wherein the two auxiliary slits are formed so as to be separated from each other toward the bottom surface of the valve body.

[6] The valve body according to claim 3, wherein the auxiliary slits are provided so as to be substantially equidistant through the central portion.

[7] The valve element according to claim 1 or 2, wherein the auxiliary slit has a single letter shape in plan view.

[8] The valve body according to claim 1 or 2, wherein the auxiliary slit has a V shape in a plan view.

[9] The valve element according to claim 8, wherein the auxiliary slit intersects the second slit at a valley portion in the V-shape, and the valley portion is located on the center portion side. .

[10] The valve element according to claim 1 or 2, wherein the auxiliary slit has a U-shape in plan view.

[11] The valve body according to claim 10, wherein the auxiliary slit intersects the second slit at a valley portion in the U-shape, and the valley portion is located on the center portion side. .

12. The valve body according to claim 1 or 2, wherein a depth of the auxiliary slit with respect to the valve body is substantially equal to a depth of the second slit with respect to the valve body.

13. The valve element according to claim 12, wherein the auxiliary slit has a portion where the depth changes with respect to a longitudinal direction of the auxiliary slit.

14. The valve body according to claim 1 or 2, wherein at least one of the first slit and the second slit has a single letter shape in plan view.

15. The valve element according to claim 1, wherein the elongated member is a dilator, a catheter, or a guide wire.