DR. PAUL WALINSKY, M.D.
Osteopathic Medicine at Chestnut St, Philadelphia, PA

5150717, Sep 29, 1992

Sep 18, 1990

7/584061

Arye Rosen - Cherry Hill NJ
Paul Walinsky - Philadelphia PA

A61B 1736

128804

An angioplasty catheter includes a coaxial transmission line with an elongated center conductor and outer conductor. The transmission line terminates at the distal end in an antenna and a balloon. A longitudinal central bore through the center conductor is dimensioned to accept the guide filament. The center conductor is made from a metallized TEFLON polytetrafluoroethylene fluorocarbon tube.

4641649, Feb 10, 1987

Oct 30, 1985

6/792895

Paul Walinsky - Philadelphia PA
Arye Rosen - Cherry Hill NJ
Arnold J. Greenspon - Jenkintown PA

RCA Corporation - Princeton NJ

A61N 132

1283031

A medical procedure for treatment of tachycardia (rapid heartbeat) or cardiac disrhythmia uses a catheter which includes a flexible coaxial transmission line (coax) terminated by an antenna. The antenna and coax are introduced into a chamber of the heart. The antenna is brought into contact with a wall of the heart. Action potentials generated by the heart are coupled through the antenna and the coaxial cable to a standard electrocardiograph apparatus for display. Other electrodes placed about the body also produce action potentials which are displayed by the electrocardiograph. The position of the antenna in the chamber of the heart is adjusted with the aid of the displayed action potentials until the antenna is in contact with the region to be ablated or injured as indicated by its characteristic electrical signature. When the antenna is adjacent to or in contact with the desired location, radio frequency or microwave frequency electrical energy is applied to the proximal end of the coax and through the coax to the antenna. The action potentials may be viewed while the electrical energy is applied.

4643186, Feb 17, 1987

Oct 30, 1985

6/792852

Arye Rosen - Cherry Hill NJ
Paul Walinsky - Philadelphia PA

RCA Corporation - Princeton NJ

A61N 132

1283031

Percutaneous transluminal electromagnetic (EM) catheter angioplasty is performed using radio frequency (RF) or microwave frequency power. The catheter includes a coaxial transmission line terminated at its distal end in an antenna. The antenna includes an extension of the coaxial center conductor past the outer conductor. A treatment includes orienting the catheter in the lumen of a cardiac artery adjacent stenotic plaque, and applying sufficient electric power to cause arcing for electroabrasion of the plaque. Another catheter includes a balloon located at the distal end of the the catheter and surrounding the antenna. In use, the balloon is pressurized so as to apply lumen-expanding force against the plaque. The antenna radiates EM energy, heating and softening the plaque, thereby allowing the plaque to be compressed and the stenotic lumen to have increased patency. In another embodiment, a portion of the interior surface of the balloon is metallized so that, when inflated, the metallized surface of the balloon coacts with the antenna to form a reflector.

5108370, Apr 28, 1992

Oct 3, 1989

7/416709

Paul Walinsky - Philadelphia PA

A61M 2900

604 96

A perfusion balloon catheter, as for angioplasty, has the balloon formed so that, when inflated within a vas or coronary artery, one or more channels are provided for the flow of bodily fluids or blood past the inflated balloon. In one embodiment, the balloon has a toroidal shape which defines a central open channel. In another embodiment, the balloon defines a multiply-lobed form which allows flow between the lobes. Balloon catheters with open channels, when used for angioplasty, reduce the likelihood of early termination of the procedure due to chest pain.

5129396, Jul 14, 1992

Sep 18, 1990

7/584062

Arye Rosen - Cherry Hill NJ
Paul Walinsky - Philadelphia PA

A61B 500

1286531

A multipurpose catheter apparatus for microwave aided balloon angioplasty includes a balloon capable of being filled with a lossy dielectric liquid, and bearing a metallization pattern. The catheter includes an electromagnetic transmission line. Radio frequency energy applied to the proximal end of the electromagnetic transmission line is radiated by an antenna within the balloon. The metallization pattern causes a portion of the energy applied to the proximal end of the transmission line to be reflected, which affects a characteristic such as impedance, return loss or time of reflection. A measurement apparatus measures the characteristic, and the distention of the balloon is determined from the measured characteristic. A guide filament may extend through the transmission line.

5240004, Aug 31, 1993

Feb 14, 1992

7/837375

Paul Walinsky - Philadelphia PA
Peter A. Lewin - Wyndmoor PA
John M. Reid - Strafford PA

Thomas Jefferson University - Philadelphia PA
Drexel University - Philadelphia PA

A61B 812

12866206

Novel intravascular, ultrasonic imaging catheters are provided which utilize thin layers of a flexible plastic material, such as PVDF, which can be spot polarized in active regions which are to serve as piezoelectric transducers. Thin layer metallic electrodes are deposited on opposing surfaces of these active regions. Strips of the appropriately configured material also having shielding and backing and/or core forming portions are spiral wound into a completed catheter. Alternatively, the catheters are fabricated from extruded PVDF tubing which may be formed around a central core which carries those electrodes which are to contact the inner surface of the extruded tube.

5109861, May 5, 1992

Apr 28, 1989

7/344919

Paul Walinsky - Philadelphia PA
Peter A. Lewin - Wyndmoor PA
John M. Reid - Strafford PA

Thomas Jefferson University - Philadelphia PA
Drexel University - Philadelphia PA

A61B 812

12866206

Novel intravascular, ultrasonic imaging catheters are provided which utilize thin layers of a flexible plastic material, such as PVDF, which can be spot polarized in active regions which are to serve as piezoelectric transducers. Thin layer metallic electrodes are deposited on opposing surfaces of these active regions. Strips of the appropriately configured material also having shielding and backing and/or core forming portions are spiral wound into a completed catheter. Alternatively, the catheters are fabricated from extruded PVDF tubing which may be formed around a central core which carries those electrodes which are to contact the inner surface of the extruded tube.