JPH1066731A - Catheter introducing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid the over-fastening of a valve pressure adjusting member and prevent the excessive deformation of a hemostatic valve having a screw type rear end face and the pressable valve pressure adjusting member by providing a display means indicating the valve pressure level by the valve pressure adjusting member. SOLUTION: A hemostatic mechanism 5 having a catheter communication hole communicated with the inside of a sheath and preventing a leak of blood is provided with a flexible hemostatic valve 5a inserted into a valve fitting section 3b" and a valve pressure adjusting member 5d fitted to the end section 3c of a catheter introducing body 3 via a screw mechanism. The pressed/opened state of the valve pressure adjusting member 5d is displayed by the positional relation between three marks 3i, 3i', 3i" and one mark 5d" marked on the outer peripheral wall of the end section 3c of the catheter introducing body 3 and the outer peripheral wall of the valve pressure adjusting member 5d. The deformation or breakage caused by the excessive screwing of a catheter 4 is avoided, and the remarkable distortion of the hemostatic valve 5a is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a catheter introduction device for introducing a catheter into a blood vessel.
The present invention relates to a hemostatic mechanism for preventing blood from leaking.

[0002]

2. Description of the Related Art Lesions such as ischemic heart disease caused by arteriosclerosis in coronary arteries or cerebral disease caused by cerebral hemorrhage or cerebral thrombosis are located at sites where direct visual observation is difficult. Therefore, a catheter with a smaller diameter than the endoscope used for definitive diagnosis and treatment of the digestive, respiratory and urinary organs is introduced into coronary arteries, cerebral blood vessels, etc., and directly observed visually, Techniques have been developed for use in dilatation of stenosis. In order to introduce such a catheter into a blood vessel, a catheter introduction device is used.

[0003]

Here, the structure of a conventional catheter introduction device will be described below with reference to FIG.

In FIG. 1, reference numeral 11 denotes a catheter introduction device. In the catheter introduction device 11, a hollow tubular sheath 2 to be introduced into a blood vessel is attached to one end (tip) 13a via a connecting member 2a. And sheath 2
A catheter introduction body 13 having a catheter conduction hole 13b communicating with the inside of the inside, and a valve mounting portion (expanded portion) 13b ″ in which the inner diameter of the catheter conduction hole 13b is enlarged and formed with a step 13b ′ at the rear end thereof. And a hemostatic mechanism 15 for preventing blood from leaking from the catheter passage hole 13b.

[0005] Such a hemostasis mechanism 15 of the catheter introduction device 11 is provided with a valve attachment portion 1 of the catheter passage hole 13b.
3b ", and a cylindrical flexible hemostatic valve 15a having one end face fixed to the step 13b ', and fitted and inserted into the valve mounting portion 13b" adjacent to the hemostatic valve 15a. Pressed tube 15b and end portion 1 of catheter introduction body 13
3c is provided with a projection 15c "to be pressed against the pressing tube 15b by a screw mechanism.
And is constituted by. Each of the hemostatic valve 15a, the pressing tube 15b and the valve pressure adjusting member 15c has through holes 15a ', 15b' and 15 through which the catheter 4 is to be conducted.
c 'is formed to be able to communicate.

In the catheter introduction device 11 having such a configuration, when the valve pressure adjusting member 15c is screwed in, the pressing tube 15b is pressed toward the step 13b ', and the hemostatic valve 1 is pressed.
5a is elastically deformed, and its through-hole 15a 'is narrowed and closed. In this state, the sheath 2 is introduced into the blood vessel, the tip of the sheath 2 is sent to the observation site, and then the tip of the catheter 4 is pushed into the depth of the through hole 15a 'of the valve pressure adjusting member 15c.
The once closed through-hole 15a 'of the hemostatic valve 15a is pushed and expanded, and is introduced into the sheath 2 through the catheter passage 13b. Here, as shown in FIG. 7, since the through hole of the hemostatic valve 15a is narrowed and closely attached to the outer periphery of the catheter 4,
Blood leakage is prevented.

[0007]

However, the hemostasis mechanism 15 of the conventional catheter introduction device 11 has the following problems.

That is, the hemostatic condition is set in a state where the valve pressure adjusting member 15c is pushed in. The setting depends on the user's sense of manual adjustment, and the catheter 4 is deformed due to excessive tightening of the valve pressure adjusting member 15c.・ Damage may be caused.

[0009] In view of the above problems, an object of the present invention is to provide a catheter introduction device that can easily introduce a catheter into a blood vessel without causing deformation and breakage of the catheter.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a catheter connecting a distal end side of a hollow tubular sheath for introducing a catheter into a blood vessel and communicating with a hollow of the sheath. A catheter introduction body having a hole, and a hemostatic mechanism for preventing blood from leaking from the inside of the catheter conduction hole at the rear end side of the catheter introduction body, wherein the hemostatic mechanism is provided at the rear end side of the catheter introduction body. A flexible hemostatic valve having a through hole through which the catheter passes, and a valve pressure adjusting member capable of screwing and pressing the rear end surface of the hemostatic valve, which is housed in a valve mounting portion communicating with the catheter passage hole. And a display means for indicating a valve pressure increase / decrease by the valve pressure adjusting member.

[0011] In the configuration including the display means for indicating the valve pressure increase / decrease, it is possible to prevent the valve pressure adjusting member from being excessively tightened, so that the hemostatic valve can be prevented from being excessively deformed, and the hemostatic operation can be facilitated. In addition, deformation and breakage of the catheter can be reliably prevented.

In particular, when the display means is a mark indicating the rotation position of the valve pressure adjusting member on the outer peripheral surface of the catheter introduction body and the valve pressure adjusting member, the display means itself is not bulky and the manufacturing cost is low. It also contributes to the development.

[0013]

Next, an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 is a sectional view showing the structure of the catheter introduction device according to the present embodiment. In FIG. 1, reference numeral 1 denotes a catheter introduction device. In the catheter insertion device 1, a hollow tubular sheath 2 to be introduced into a blood vessel is attached to one end (a distal end) 3 a, and is inserted inside the sheath 2. The catheter introduction body 3 having the catheter conduction hole 3b communicating therewith and the other end (rear end) 3c of the catheter introduction body 3 are arranged to prevent blood from leaking from the catheter conduction hole 3b. It is constituted by the hemostatic mechanism 5. Here, the catheter introduction body 3 is a sheath attachment member 3d in which the distal end portion 2a 'of the connecting member 2a of the sheath 2 is screwed to form an inner screw portion 3d to be attached.
And a catheter introducing member 3f having a physiological saline introducing hole 3f 'which is connected to the sheath attaching member 3d via a packing 3e and branches off at an intermediate portion of the catheter conducting hole 3b. In a catheter through hole 3b penetrating the inside of the sheath attachment member 3d and the catheter introduction member 3f, a valve attachment portion (enlarged diameter portion) 3b ″ having an inner diameter enlarged by a step portion 3b ′ is formed.

On the other hand, the hemostatic mechanism 5 includes the catheter through-hole 3.
b, a rigid holding tube 5b fitted to the valve mounting portion 3b ″ and fixed to the stepped portion 3b ′, and a flexible disk-shaped hemostatic valve 5a fitted to the valve mounting portion 3b ″. And a rigid holding tube 5c which is inserted into the valve mounting portion 3b "in a state where the hemostatic valve 5a is held between the holding tube 5b and the end portion protruding from the catheter through hole 3b; And a valve pressure adjusting member 5d attached to the end 3c by forming a screw mechanism.

Each of the hemostatic valve 5a, the holding tubes 5b and 5c, and the valve pressure adjusting member 5d is formed with through holes 5a ', 5b', 5c 'and 5d' through which the catheter 4 can communicate. I have.

FIG. 2 is a cross-sectional view showing the shape of the hemostatic valve 5a. Tapered ends 5e 'and 5f' are formed on both end surfaces 5e and 5f of the hemostatic valve 5a toward the through holes 5a '. Thus, the thickness of the through hole 5a 'is thinner than the surrounding area. By these tapers 5e 'and 5f', the end faces 5e and 5f of the hemostatic valve 5a and the holding tubes 5b and 5C are in contact with the through hole 5a 'with a gap.

Further, as shown in FIG. 3, three engraved marks 3i, 3i ',
3i "is pressed, while one stamp 5d" is pushed on the outer peripheral wall of the valve pressure adjusting member 5d, and the stamp 5d "and the stamp 3 are pressed.
The pressed / open state of the valve pressure adjusting member 5d is indicated by the positional relationship of i, 3i ', 3i ". For example, by setting the mark 5d" between the marks 3i, 3i', an appropriate mark is set. The pressing force deforms the hemostatic valve 5a, and the catheter 4
Can be set to the closed state of the through hole 5a 'without excessively tightening and deforming.

In the catheter introduction device 1 having such a configuration, when the valve pressure adjusting member 5d is screwed until the mark 5d ″ is located between the marks 3i and 3i ′ of the catheter introduction body 3, the holding tube 5c stops hemostasis. When the valve 5a is pressed toward the holding tube 5b, the hemostatic valve 5a is deformed so that the through hole 5a 'is narrowed and closed.
e ', 5f' are formed, and the wall thickness of the through hole 5a 'is smaller than that of the periphery, so that the pressing force around the through hole 5a' is lower than the outer peripheral side. Is added. Therefore, the deformation of the hemostatic valve 5a is concentrated on the side of the through hole 5a 'without bias, and the through hole 5a' is closed without distortion. In this state, the sheath 2 is introduced into the blood vessel, and the distal end thereof is sent to the observation site. Then, the catheter 4 is introduced into the catheter conduction hole 3b. At this time, the catheter 4 introduced from the through hole 5d 'of the valve thickness adjusting member 5d is easily guided into the through hole 5a' by the taper 5f 'of the hemostatic valve 5a. Further, the catheter 4 is fed through the catheter passage 3b, and is introduced into the sheath 2. At this time, since the contact area between the catheter 4 and the hemostatic valve 5a is small, the frictional force is reduced, so that the catheter 4 can be easily introduced. In this state, as shown in FIGS. 4 and 5, the hemostatic valve 5a is in close contact with the outer periphery of the catheter 4, and the hemostatic state is maintained. Here, the through hole 5a '
Is uniformly reduced and closed, and the hemostatic valve 5a is in close contact with the catheter 4 with a uniform thickness, so that the hemostatic state can be reliably maintained and the catheter 4 does not deform.

Further, stamps 3i, 3i ', 3i "and 5
Since d ″ indicates the screwed / open state of the valve pressure adjusting member 5d, excessive screwing can be avoided, and significant distortion of the hemostatic valve 5a does not occur. Therefore, deformation and breakage of the catheter 4 can be prevented.

[0021]

As described above, since the present invention is provided with the display means for indicating the valve pressure increase / decrease, it is possible to avoid excessive tightening and to prevent the hemostatic valve from being excessively deformed. This facilitates simplification and can reliably prevent deformation and breakage of the catheter.

In particular, when the display means is a mark indicating the rotational position of the valve pressure adjusting member on the outer peripheral surface of the catheter introduction body and the valve pressure adjusting member, the display means itself is not bulky and the manufacturing cost is low. It also contributes to the development.

[Brief description of the drawings]

FIG. 1 is a sectional view showing the structure of a catheter introduction device according to an embodiment of the present invention.

FIG. 2 is a sectional view showing a structure of a hemostatic valve in the catheter introduction device.

FIG. 3 is a perspective view of the vicinity of a valve pressure adjusting member showing a configuration of a display means in the catheter introduction device.

FIG. 4 is a cross-sectional view around a hemostasis mechanism showing a hemostasis state in the catheter introduction device.

FIG. 5 is a sectional view taken along the line AA ′ in FIG. 4;

FIG. 6 is a cross-sectional view showing the structure of a conventional catheter introduction device.

FIG. 7 is a cross-sectional view around a hemostasis mechanism showing a hemostasis state in the catheter introduction device shown in FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Catheter introduction device 3 ... Catheter introduction body 3b ... Catheter conduction hole 3i, 3i ', 3i ", 5d" ... Marking 5 ... Hemostatic mechanism 5a ... Hemostatic valve 5b, 5c ... Clamping tube 5d ... Valve pressure adjustment member.

Claims (2)

[Claims] 1. A catheter introducer having a catheter passage hole connectable to a distal end side of a hollow tubular sheath for introducing a catheter into a blood vessel and communicating with a hollow of the sheath, and a rear end side of the catheter introducer. A hemostatic mechanism for preventing blood from leaking from the inside of the catheter through-hole, wherein the hemostatic mechanism is housed in a valve mounting portion communicating with the catheter through-hole at the rear end side of the catheter introduction body, In a catheter introduction device having a flexible hemostatic valve having a through hole through which a catheter passes, and a valve pressure adjusting member capable of screwing and pressing a rear end surface of the hemostatic valve, the catheter introduction device includes: A catheter introduction device comprising a display means for indicating the pressure of a valve. 2. The catheter according to claim 1, wherein the display means is a mark on an outer peripheral surface of the catheter introduction body and the valve pressure adjusting member, which indicates a rotation position of the valve pressure adjusting member. Introduction device.