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Ductus bursae

A technology of catheters and inner tubes, applied in the field of balloon catheters, can solve the problems of increased burden on patients and insufficient inflation of the balloon, and achieve the effect of easy selection

Inactive Publication Date: 2008-06-11
VAYU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Therefore, if the balloon is stretched too far, problems can arise: where, in an attempt to dilate a curved vessel, the vessel is forcibly stretched; where the ends of the balloon may locally exert stress on the outer wall of the curved vessel; and where the inside of the curved portion of the bladder is bent and the bladder does not inflate adequately
In the case where the length of the sac is shortened in order to reduce this problem, there has been a problem because the burden on the patient becomes larger because the sac needs to be transferred several times and repeatedly if the extent of the blood vessel to be expanded is longer than the length of the sac expand

Method used

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Examples

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Embodiment Construction

[0026] Embodiments of the present invention

[0027] Embodiments of the present invention are described below by way of example.

[0028] The balloon catheter 1 shown in FIG. 1 includes a long shaft 3 , a balloon 5 arranged at the distal end of the shaft 3 , and a connector 7 arranged at the proximal end of the shaft 3 .

[0029] The shaft 3 is a double tube constructed by inserting the inner tube 13 into the inner hollow portion of the outer tube 11 . The distal end of the outer tube 11 is connected to the proximal end of the balloon 5 in a fluid-tight manner, and the inner hollow of the outer tube 11 communicates with the interior of the balloon 5 . The inner tube 13 extends further in the distal direction than the connection between the outer tube 11 and the balloon 5 and passes through the interior of the balloon 5 . The distal end of the balloon 5 is connected to the peripheral surface of the distal end of the inner tube 13 in a fluid-tight manner.

[0030] The outer t...

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PUM

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Abstract

A balloon catheter capable of expanding the stenosed part of a blood vessel near a bent portion and capable of forming the shape of a balloon in a specific bent shape without performing delicate control. The balloon (5) of the balloon catheter (1) is molded in a shape having the bent portion beforehand. When the internal pressure of the balloon (5) is increased, the balloon is expanded so as to be formed in the bent shape provided at the time of molding. Since the bent shape is maintained even if the internal pressure of the balloon (5) is increased, the bent angle, diameter, and length of the balloon (5) are not changed according to a rise in the internal pressure of the balloon (5). Thus, the balloon (5) can be expanded to the predetermined bent shape unless the internal pressure of the balloon (5) is delicately controlled.

Description

technical field [0001] The present invention relates to a balloon catheter for percutaneous transluminal angioplasty. In particular, the present invention relates to balloon catheters for dilating tortuous blood vessels at anastomotic sites between artificial and native blood vessels, shunt anastomotic sites resulting from surgical reconstruction, and stenotic sites in blood vessels in dialysis patients. Background technique [0002] Conventional balloon catheters for percutaneous transluminal angioplasty include a type of balloon catheter that has a straight-shaped balloon when inflated. For such balloon catheters with a straight-shaped balloon, the stiffness of the balloon after inflation is generally high, and the stiffness generally tends to increase especially when the balloon is inflated by higher pressures. [0003] Thus, problems may arise if the balloon is overstretched: wherein, in an attempt to dilate a tortuous vessel, the vessel is forcibly stretched; wherein b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M25/00A61F2/958
CPCA61M25/1002A61M25/1006A61M25/104A61M25/0041
Inventor 宫田昭筒井宣政筒井康弘新海知之志津妥典
Owner VAYU
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