Donald Cohen has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
Abstract: An endoscope has a handle and a bendable tube extending distally away from the handle. The tube has a selectively deflectable distal segment. An activating wire is connected to the distal segment and to the handle, and the handle has a knob which can be turned to impart force to the wire and thereby cause the distal segment of the tube to deflect. The wire is held by a hypotube column support which is attached to the handle and to the deflectable distal segment, such that when the knob is turned, the column support transfers the force of the wire to the handle to prevent buckling of the bendable tube when the distal segment deflects.
Abstract: A device for axially advancing a surgical instrument into the brain of a patient includes an advancer that is engageable with the gooseneck of a surgical apparatus. The is axially telescoping, and the advancer can selectively grip the surgical instrument. Accordingly, the surgical instrument can be gripped by the advancer and the advancer telescoped to advance the instrument into the brain along a predetermined path.
Abstract: An optical valvulotome having a replaceable blade head for in situ cutting of venous valves has a catheter that can be pushed through a vein. An anchor is attached to the catheter, and a cutting head can be releasably engaged with the anchor to cut the valves as the catheter is pushed through the vein. The cutting head has two spaced apart cutting blades that form a light passageway between the blades. An optical fiber is disposed in the catheter for collecting light from the light passageway between the blades, and the optical fiber is engaged with a display apparatus for displaying a video image of the blades and vein as the catheter is pushed through the vein. The catheter can be retrieved from the vein, and the cutting head easily disconnected from the anchor and replaced with another cutting head having a size larger or smaller than the first head, as appropriate for the changing width of the lumen of the vein.
Abstract: A suction ablation catheter, for use in inactivating portions of the heart's conduction system to prevent abnormal heartbeat rates, comprises a tubular body having an open, distal end and a proximal aperture for applying suction through the catheter and through the distal end. The catheter also has an electrode at or adjacent the distal end, and an electrode lead extending along the catheter for communication by the electrode with a power source. In accordance with this invention, a tubular, insulating member made of refractory material is positioned adjacent the distal end, the electrode being positioned within the insulating member to localize the effects of electrical pulses emitted from the electrode.
Abstract: Apparatus for locating and ablating cardiac conduction pathways is provided herein. This includes a catheter tube which carries, at its distal end, at least one electrode for sensing membrane potentials within a heart. The catheter also carries a device for ablating at least a portion of the thus located pathway.
Abstract: A catheter houses an elongated flexible fiber optic member having a light transmitting core for transmitting light received at its proximal end to its distal end at which the light is reflected back to the proximal end. The fiber optic member is coaxially surrounded by cladding throughout essentially all of its length, except for an uncladded portion of its length adjacent the distal end. A pressure transducer is located adjacent the distal end alongside the uncladded core portion. The transducer is constructed of light absorbing material having a portion thereof making variable surface area contact with the uncladded core portion in dependence upon transversely applied pressure forces. The variations in surface area contact cause changes in the light refraction characteristics. This modulates the intensity of light passing through the core proximate thereto.