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Dilatation Catheter

A technology for dilating catheters and catheter shafts, applied in catheters, balloon catheters, etc., can solve the problem of difficult extraction of balloon catheters, and achieve the effects of preventing breakage, reducing deflection, and preventing falling off

Active Publication Date: 2013-04-17
GOODMAN & COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] On the other hand, the inventors of the present application have found that the elongated member has the following problem, that is, when the balloon is deflated to extract the balloon catheter from the body, the balloon catheter will be damaged by the lesion (for example, calcined lesion) or the indwelling stent. The problem of being stuck and difficult to remove

Method used

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Effect test

no. 1 approach

[0062] Hereinafter, a first embodiment embodying the present invention will be described with reference to the drawings. figure 1 is a schematic overall side view of the balloon catheter 10 .

[0063] Such as figure 1 As shown, the balloon catheter 10 has: a catheter tube (catheter shaft) 11, a bushing 12 attached to the proximal end (base end) of the catheter tube 11, and a distal end attached to the catheter tube 11. (Front end portion) of the balloon 13.

[0064] The catheter tube 11 is composed of a plurality of tubes (tubular shafts), and has an inner and outer multi-tube structure (inner and outer double tube structure) at least from a midway position in the longitudinal direction (axial direction) to the position of the balloon 13 . Specifically, the catheter tube 11 has an outer tube (outer tube) 15 and an inner tube (inner tube) 16 having an inner diameter and an outer diameter smaller than the outer tube 15, and the inner tube 16 is inserted into the outer tube 15 ...

no. 2 approach

[0099] Figure 7 It is a sectional view showing the balloon catheter 10a of the second embodiment. The balloon catheter 10a is different from the first embodiment in that an urging spring 79 is provided between the stopper 81 and the movable mounting member 71 . The urging spring 79 can absorb the remaining length of the linear member 31 by urging force when the balloon 13 is contracted, thereby further reducing the deflection of the linear member 31 .

[0100] Applying force spring 79 can not only be Figure 7 The metal coil spring shown may be, for example, a spring-functioning resin member formed of an elastic polyamide-based elastomer as a base material. It should be noted that the urging spring 79 is also referred to as a urging member.

[0101] For example, the second embodiment has a remarkable effect when the bending rigidity of the linear member 31 is small and it is difficult to expect a restoring force, or when the balloon 13 is set long to cope with a long-term ...

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Abstract

Provided is a technology for suppressing the trapping of an elongated element included in a balloon catheter. The present invention provides a dilatation catheter. This dilatation catheter (10) comprises: catheter shafts (15, 16); a dilatation element (13) connected to one end of the catheter shaft and having a dilatation area to be dilated in the diametrical direction; and an elongated element (31) arranged along the outer circumferential surface of the dilatation area and deforming outward along with the dilatation of the dilatation area by being mounted on the catheter shafts (15, 16) at a first mounting position and a second mounting position across the dilatation area. The dilatation catheter is characterized in that a specific mounting position (45b, 71) that is at least one of the first and second mounting positions is movable relative to the catheter shafts (15, 16), and that the movement of the specific mounting position is restricted in the restricting direction that is at least one direction.

Description

technical field [0001] The present invention relates to a balloon catheter which is inserted into a living body and used for dilation treatment of a narrowed part or a blocked part of a blood vessel. Background technique [0002] Conventionally, balloon catheters have been used for treatments such as PTCA (percutaneous transluminal coronary angioplasty). It has also been proposed for balloon catheters to have an elongated element around the balloon. For example, in the balloon catheter disclosed in Patent Document 1, an elongated element is provided on the outer peripheral side of the balloon so as to straddle the balloon in the longitudinal direction. The elongated element can engage the lesion with the inflation of the balloon, thereby forming a lumen (flow path) in the axial direction in the lesion. The elongated element also has the effect of being able to inhibit slippage between the balloon and the lesion. [0003] On the other hand, the inventors of the present app...

Claims

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Application Information

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IPC IPC(8): A61M25/00
CPCA61M25/10A61M25/1006A61M2025/105A61M2025/1081A61M2025/1093
Inventor 岩野健志三宅孝政
Owner GOODMAN & COMPANY
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