BALLOON CATHETER ABLATION SYSTEM

• US 20160235477A1
• Filed: 02/16/2016
• Published: 08/18/2016
• Est. Priority Date: 02/13/2015
• Status: Abandoned Application

• Current Assignee: Japan Electel Inc
• Original Assignee: Japan Electel Inc
• Inventors: SATAKE, Shutaro
• Application Number:
  US15/044,551
• Publication Number:
  US 20160235477A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: A61B 18/1492 having a flexible, catheter-like structure, e.g. for heart ablation A61B18/1477 takes precedence
• CPC Class Codes: A61B 2018/00023 closed, i.e. without wound contact by the fluid
• CPC Class Codes: A61B 2018/0019 vibrating
• CPC Class Codes: A61B 2018/0022 Balloons
• CPC Class Codes: A61B 2018/00375 Ostium, e.g. ostium of pulmonary vein or artery
• CPC Class Codes: A61B 2018/00577 Ablation
• CPC Class Codes: A61B 2018/00875 Resistance or impedance
• CPC Class Codes: A61B 2090/065 for measuring contact or contact pressure

Abstract

Provided is a hot balloon catheter ablation system capable of achieving pulmonary vein isolation or ablation of atrial fibrillation in a safe and efficient manner. A highly directional pressure sensor 51 is provided coaxially in an anterior portion of a catheter shaft 1 within a balloon 6. As the result, there is monitored a pressing force against the balloon onto the tissue as well as a temperature of the balloon 6, impedances, potentials, and an energization time. Further, since the directional pressure sensor 51 is provided inside the balloon 6, there is monitored a pressing force from the balloon 6 onto the tissue with accuracy without being influenced by the swirls T of the liquid, thereby securing effective ablation of the target tissues.

Claims

1. A balloon catheter ablation system comprising:

a catheter shaft comprising an inner tube and an outer tube which are slidable to each other;

a balloon provided between distal ends of the inner tube and the outer tube;

a first electrode for delivery of radiofrequency current, a temperature sensor, and a directional pressure sensor, all of which being provided within the balloon;

a radiofrequency generator, a thermometer, and a pressure gauge respectively connected to the electrode for delivery of radiofrequency current, the temperature sensor, and the directional pressure sensor via a first connecting wire;

a solution transport path defined by the outer tube and the inner tube, the solution transport path being in communication with an inside of the balloon;

a syringe for deflating and inflating the balloon and a vibration generator for agitating the inside of the balloon, the syringe and the vibration generator each connected to the solution transport path;

a second electrode provided on the catheter shaft and the outside of the balloon; and

an electric impedance measuring multimeter and a voltage amplifier, each connected to the second electrode via a second connecting wire.

2. The balloon catheter ablation system according to claim 1, wherein the pressure sensor is arranged at a distal end of the catheter shaft within the balloon, comprising an input surface that is parallel to the catheter shaft and faces toward the distal end of the catheter shaft.

3. The balloon catheter ablation system according to claim 2, further comprising a breakwater cylinder arranged on a periphery of the input surface of the pressure sensor.

4. The balloon catheter ablation system according to claim 2, further comprising a breakwater funnel tube on a periphery of the input surface of the pressure sensor.

5. The balloon catheter ablation system according to claim 2, further comprising an interference tube anterior to the input surface of the pressure sensor.

6. The balloon catheter ablation system according to claim 1, wherein the pressure sensor is a gauge pressure sensor connected to the pressure gauge through the first connecting wire.

7. The balloon catheter ablation system according to claim 1, wherein the pressure sensor is an optical fiber pressure sensor connected to the pressure gauge located outside of a living body through an optical fiber serving as the first connecting wire.

8. The balloon catheter ablation system according to claim 1, wherein the balloon catheter ablation system is configured to simultaneously monitor and compare:

an electric impedance across the balloon;

an electric potential;

a balloon temperature; and

a pressure applied from the balloon to a tissue.