JPS58183174A - Cathetel introducing apparatus - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Regarding the catheter introduction device provided at the base of the sheath, catheters of different diameters can be introduced without worrying about blood leakage, and therefore catheters of different diameters can be introduced at the same time without changing the sheath. This book attempts to provide a catheter introduction device that can be used to prevent blood leakage with or without a catheter with a non-return valve, and that can further secure the catheter.

The present invention will be described in detail with reference to the embodiments illustrated below.
Reference numeral 1 denotes a flexible hollow tubular sheath, the distal end of which is introduced into the blood vessel using a guide wire or dilator. 2 is a sheath base having a hole 2a communicating with the sheath;
A mounting screw portion 3 is integrally provided on the outer periphery of the rear end portion. A connecting hole 3a communicating with the hole 28 is provided in the center of the mounting screw portion 3.
is the provision.

Reference numeral 4 denotes a catheter introducer, which is provided with an internal threaded part 5 that is screwed into the mounting threaded part 3, and a connecting tube b that fits into the connecting hole 3a in the center thereof, and a tube hole 6 of the connecting tube 6 in the connected state.
a and the hole 2a of the sheath base 2 are configured to communicate with each other. The tube hole 6a constitutes a catheter passage hole. A valve mounting hole 8 having a tapered valve pressing surface 7 is provided at the removed end of the pipe hole 6a, and in the case of the embodiment, the valve mounting hole 8 is opened outward as it is. Inside the valve mounting hole 8, two W holding pipes 9 and 10 made of synthetic resin are connected to the pipe hole 9m.
10 m is housed along the pipe hole 6a, and a check valve 11 is provided between these two clamping pipes 9 and 10. The check valve 11 is made of elastic synthetic rubber and has three divided holes 11 connected at the center.
m is provided along the radial direction. In addition, the valve mounting hole 8
A threaded portion 12 is provided on the outer periphery of the valve pressure adjusting member 13, and an internal threaded portion 13 of the valve pressure adjusting member 13 is screwed into the threaded portion 12. At the center of the internal threaded portion 13m is a valve press pipe 14.
is provided protrudingly, and the pipe 14 is configured to fit into the valve mounting hole 8 from the outside and press the clamping pipe IO. The lumen of the valve presser tube 14 is connected to the catheter introducer 4.
The catheter passage hole 15 is configured as follows. Note that the distal end surface of the valve pressing tube 14 may be configured to be tapered with respect to the clamping tube 10 as a valve pressing surface.

To explain how the device of the present invention is used based on the above-mentioned embodiments, when the internal thread 58 of the catheter introducer 4 is screwed into the mounting screw portion 3 of the sheath base 2 and dammed, the connecting tube 6 is attached to the sheath base 2. The tube hole 6a communicates with the hole 21 of the sheath base 2 as a catheter passage hole. Next, when the internal threaded part 13& of the valve pressure adjustment member 13 is screwed in along the threaded part 12 of the catheter introducer 4, the clamping pipes 9, 10 and the backflow prevention valve 11 in the valve mounting hole 8 are tapered by the valve pressing pipe 14. It will be pressed toward the --shaped valve pressing surface 7.

In this state, the slotted holes 2m, 6m, and 9m communicating with the sheath 1 are closed by the check valve 11, and when the sheath 1 is introduced into the blood vessel, the divided holes 11 of the check valve 11 are in close contact with each other.
Blood leakage is stopped by m. Next, when the catheter is inserted through the catheter introduction hole 15, the divided hole 11m of the check valve 11 is pushed open by the catheter, but the clamping tubes 9 and 1 are pressed by the tapered valve pressing surface 7.
The lumen 9a and 10a of 0 are in close contact with the periphery of the catheter,
Blood leakage from the gap between the catheter and its passage hole is also prevented. Further, when the catheter is pulled out, the dividing hole 111 of the check valve 11 closes as described above, and blood leakage is prevented. On the other hand, when a thin catheter of different diameter is passed through, the valve pressure adjusting member 13 is further screwed in to press tube 1.
4 increases the pressing force on the clamping pipes 9 and 10, and the pipe hole 9m,
It is sufficient to strengthen the adhesion to the 10 m outer circumference of the catheter. Additionally, the catheter can be fixed by the tightening force of the valve pressure adjusting member 13, which is convenient when injecting a contrast medium.

As described above, according to the device of the present invention, a check valve is provided in the catheter passage hole of the catheter introducer provided at the base of the sheath, which opens when the catheter is passed through the catheter, and which operates regardless of the presence or absence of the catheter, so that the valve pressure can be freely adjusted. With this configuration, catheters of different diameters can be introduced without worrying about blood leakage, and blood leakage can be prevented when changing catheters.Furthermore, when contrast medium is injected, catheters with different diameters can be introduced without worrying about blood leakage. It has the effect of being able to be fixed.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an embodiment of the apparatus of the present invention, FIG. 2 is a vertical sectional side view of the main part thereof, and FIG. 3 is an exploded perspective view showing the main part cut away and exploded. 1 Sheath 2 Sheath base 4 Catheter introducer 7 Valve pressing surface 8 Valve mounting hole 9, 10 Clasp tube 11 Backflow prevention valve 13 Valve pressure adjustment member patent applicant
Intertuba Co., Ltd. Figure 7 Figure 2 Figure C

Claims (2)

[Claims] (1) A catheter introducer is provided at the base of the sheath for introducing the catheter into the blood vessel, and a backflow prevention valve that opens when the catheter is introduced into the catheter introduction hole of the skeleton catheter introducer and operates regardless of the presence or absence of the catheter. A catheter introduction device that is provided with a valve pressure that can be freely adjusted. (2) A catheter introducer is provided at the base of the sheath for introducing the catheter into the blood vessel, a valve attachment hole having a tapered valve pressing surface is provided in the catheter introduction hole of the catheter introducer, and the valve is attached. A catheter introduction device comprising: a backflow prevention valve that opens when a catheter is passed through the hole, sandwiched between two flexible clamping tubes; and a valve pressure adjusting member capable of pressing the clamping tube against a valve pressing surface. .