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Esophageal liquid-supply catheter, and intermediate component of esophageal liquid-supply catheter

A catheter and liquid delivery technology, applied in catheters, parts of surgical instruments, contraceptives, etc., can solve the problems of unable to completely prevent temperature transmission, unable to efficiently reduce temperature transmission, unable to efficiently deliver liquid, etc.

Pending Publication Date: 2021-07-23
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] However, in the case of feeding liquid to the esophagus with the catheter tube represented by Patent Document 1, the esophagus may not be efficiently delivered in a state where the esophagus is pressed from the outside due to the state of the patient, the weight of the organs, etc. Possibility of liquid delivery
[0012] In addition, even if the position of the esophagus is changed as in Patent Document 2, there is a possibility that the temperature transfer cannot be completely prevented.
[0013] In Patent Document 3, temperature adjustment is performed by bringing a balloon that circulates a liquid into contact with the esophagus. However, since the temperature adjustment is only performed at the contact portion of the balloon, it may not be as efficient as the method of directly supplying liquid into the esophagus. Reduces the possibility of temperature transfer

Method used

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  • Esophageal liquid-supply catheter, and intermediate component of esophageal liquid-supply catheter
  • Esophageal liquid-supply catheter, and intermediate component of esophageal liquid-supply catheter
  • Esophageal liquid-supply catheter, and intermediate component of esophageal liquid-supply catheter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] A hose made of polyvinyl chloride having an outer diameter of 4.7 mm, an inner diameter of 3.8 mm, and a length of 550 mm was formed and provided as a cylindrical member 2 .

[0063] A hose made of polyurethane with an outer diameter of 2.3 mm, an inner diameter of 1.2 mm, and a length of 580 mm was formed and installed as a shaft 4 . Only a copper wire with a diameter of 0.1 mm and a length of 650 mm coated with an electrically insulating protective coating made of polytetrafluoroethylene and a wire with a diameter of 0.1 mm and a length of 650 mm coated with an electrically insulating protective coating made of polytetrafluoroethylene are used. The ends of the two metal wires of the copper wire are welded together to form a thermoelectric pair, and the soldered thermoelectric pair is fixed inside a SUS304 tube with an outer diameter of 2.5 mm, an inner diameter of 2.3 mm, and a length of 4.4 mm, thereby forming a temperature sensor 8 . Three temperature sensors 8 are...

Embodiment 2

[0068] The liquid feeding catheter for esophagus of Example 2 (hereinafter, "Example 2") was produced in the same manner as in Example 1 except that the width of the vinyl chloride flat plate used as the arm 3 was changed to 0.9 mm. The maximum width of the section of the arm 3 is 1.0 mm.

Embodiment 3

[0072] An esophagus liquid feeding catheter of Example 3 (hereinafter referred to as "Example 3") was fabricated in the same manner as in Example 1 except that the width of the vinyl chloride flat plate used as the arm 3 was changed to 0.5 mm. The maximum width of the section of the arm 3 is 0.7 mm.

[0073] Hereinafter, the method and result of comparative evaluation using Example 1, Example 2, Comparative Example 1, and Example 3 are shown.

[0074] (Temperature transfer reduction effect)

[0075] Figure 8 It is a schematic diagram of the evaluation system for confirming the effect of reducing the temperature transmission by the esophageal liquid feeding catheter. In this evaluation, an ablation catheter with a balloon capable of heating the balloon in the atrium was assumed, and a polyurethane balloon with a thickness of 30 μm and a diameter of 30 mm was installed as the heat source 18 by circulating warm water at 70° C. at a rate of 1 L / min. By circulation of this warm...

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Abstract

The present invention discloses an esophageal liquid-supply catheter with which it is possible to efficiently supply a liquid to the esophagus and thereby reduce temperature conduction during heating, cooling, etc., caused by ablation of the esophagus. This esophageal liquid-supply catheter comprises a cylindrical member, a plurality of arms of which the proximal-end parts are secured to a distal-end part of the cylindrical member, and a distal-end tip secured to the distal ends of the arms, the esophageal liquid-supply catheter being such that the plurality of arms are capable of deforming and extending outward in the radial direction of the cylindrical member. For example, a shaft that is inserted into the cylindrical member and has the distal end thereof secured to the distal-end tip is provided, and the shaft is caused to slide toward the proximal-end side relative to the cylindrical member, thereby making it possible to cause the arms to extend radially outward.

Description

technical field [0001] The present invention relates to a liquid delivery catheter for esophagus and an intermediate part for manufacturing the liquid delivery catheter for esophagus. Background technique [0002] Catheter ablation for treating cardiac arrhythmias such as atrial fibrillation is a method in which a catheter is inserted into the body and the end of the catheter is heated or cooled to destroy a target site in the heart. [0003] As an ablation catheter used in this treatment method, various catheters have been developed. For example, an ablation catheter with a balloon in which a balloon is installed at the end of the catheter and the balloon can be heated in the atrium, and an ablation catheter with a balloon capable of cryoablation are known. balloon ablation catheter. [0004] In the case of intracardiac ablation in this way, the influence (temperature) of the ablation may be transmitted to the esophagus close to the heart to cause complications of the esop...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61M25/00A61F7/12A61B18/00
CPCA61B2018/00577A61B2018/00351A61F7/123A61F2007/0086A61F2007/0095A61M25/0074A61B2018/00488A61F2007/0092A61F7/12A61M25/0026A61M25/0097A61M19/00A61B18/1492A61M2210/105A61B2018/00011A61B2018/00791A61B18/00A61B2018/00029
Inventor 山本昌弘中嶋博树池田智彦松熊哲律冈田达弥
Owner TORAY IND INC
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