1
Hosheng Tu, Weng Kwen Raymond Chia, Cary Hata: Catheter probe for treating focal atrial fibrillation in pulmonary veins. Irvine Biomedical, April 17, 2001: US06217576 (354 worldwide citation)

An improved catheter system and methods for ablating cardiac tissues via a steerable ablation catheter having a liquid-permeable shaft, a liquid-permeable electrode, or a distal opening at its tip section with fluid infusion and irrigation for ablating intracardiac tissues by applying radiofrequency ...


2
Weng Kwen Raymond Chia, Hosheng Tu: Steerable catheter having a loop electrode. Irvine Biomedical, April 27, 1999: US05897554 (311 worldwide citation)

An electrophysiology catheter suitable for radiofrequency ablation of cardiac tissues comprises a proximal section, a catheter shaft section and a distal section whereby a distal loop electrode having a temperature sensor and a close-loop temperature control. A conducting wire extends through the lu ...


3
Weng Kwen Raymond Chia, Hosheng Tu: Catheter system and methods thereof. Irvine Biomedical, March 2, 1999: US05876399 (302 worldwide citation)

This invention discloses an ablation catheter system with fixation means for use in treatment of cardiac tissues and in other medical applications, such as ablating tumors in a natural body conduit or cavity by applying RF energy, and an inner catheter having alternate energy sources for enhanced ab ...


4
Hosheng Tu, Weng Kwen Raymond Chia: Ablation apparatus with ultrasonic imaging capabilities. Irvine Biomedical, March 2, 1999: US05876340 (229 worldwide citation)

An RF ablation apparatus has a delivery catheter with distal and proximal ends. A handle is attached to the proximal end of the delivery catheter. The delivery catheter has an electrode deployment means where said electrode deployment means includes a retractable tip section comprising a deployable ...


5
Weng Kwen Raymond Chia, Hosheng Tu: Catheter system having a porous shaft and fluid irrigation capabilities. Irvine Biomedical, June 22, 1999: US05913856 (221 worldwide citation)

An improved ablation catheter having a distal tip section made of flexible porous plastic material for fluid infusion and irrigation at its electrode comprises a catheter shaft having a distal section and at least one lumen extending therebetween, wherein the catheter is inserted into the chambers o ...


6
Hosheng Tu, Weng Kwen Raymond Chia: Catheter having cooled multiple-needle electrode. Irvine Biomedical, August 11, 1998: US05792140 (200 worldwide citation)

An improved ablation catheter with at least one multiple-needle electrode can be used in ablating the arrhythmogenic region instead of an arrhythmogenic point of a patient. This catheter is particularly useful for treating the patient with atrial fibrillation (AFib) indications. A catheter suitable ...


7
Hosheng Tu, Weng Kwen Raymond Chia: Catheter system having parallel electrodes. Irvine Biomedical, April 6, 1999: US05891138 (194 worldwide citation)

A catheter system comprising a delivery catheter with distal and proximal ends; a handle attached to the proximal end of the delivery catheter; the delivery catheter having an electrode deployment means where said electrode deployment means includes a retractable tip section comprising a plurality o ...


8
Hosheng Tu, Weng Kwen Raymond Chia: Catheter system having a ball electrode. Irvine Biomedical, December 1, 1998: US05843152 (131 worldwide citation)

An improved catheter system having at least one electrode at its tip section, can be used in ablating the arrhythmogenic point of a patient. A catheter suitable for radiofrequency ablation of cardiac tissues comprises a catheter shaft having a distal section, a distal end, a proximal end and at leas ...


9
Hosheng Tu, Weng Kwen Raymond Chia: Catheter having multiple-needle electrode and methods thereof. Irvine Biomedical, August 24, 1999: US05941845 (121 worldwide citation)

An improved ablation catheter with at least one multiple-needle electrode can be used in ablating the arrhythmogenic region instead of an arrhythmogenic point of a patient. This catheter is particularly useful for treating the patient with atrial fibrillation (AFib) indications. A catheter suitable ...


10
Hosheng Tu, Weng Kwen Raymond Chia, Cary Hata: Self-guiding catheter system for tissue ablation. Irvine Biomedical, September 18, 2001: US06290697 (119 worldwide citation)

An improved guiding catheter system having inflated balloon at its tip section, wherein the inflated balloon having a plurality of electrodes is heated to a predetermined temperature as an ablation means for delivering the thermal energy to a tissue by deploying the balloon to contact the tissue to ...