John R Parrish

US Patent:

52500250, Oct 5, 1993

Filed:

Jan 10, 1992

Appl. No.:

7/819452

Inventors:

Stephen A. Sosnowski - Oceanside CA
John H. Parrish - La Jolla CA
Alan J. Schempp - San Clemente CA

Assignee:

Intramed Laboratories - San Diego CA

International Classification:

A61M 3100
A61M 2900

US Classification:

604 51

Abstract:

A percutaneous access catheter is employed for examining and treating internal body cavities and organs via an access tract. For example, the catheter can be employed for examining and treating the gallbladder via a transhepatic tract. The examination may employ endoscopic, fluoroscopic, ultrasonic, or other techniques; the treatment may employ surgical, chemical, or physical modalities. The catheter includes two inflation elements. These inflation elements control hemorrhaging and leakage of fluids from the internal body cavity or organ and reduce migration of the catheter within the internal body cavity or organ during the examination and/or treatment. The first inflation element is a toroidal elastic balloon located at the distal end of the device which serves to restrict the accidental or unintended removal of the distal end from the internal body cavity or organ. The second inflation device is an inflatable nondistensible sleeve which serves to anchor the device to the access tract during the medical procedure. The two inflation elements can act cooperatively so as to anchor the internal body cavity or organ to the access tract and so as to reduce the migration of the distal end of the device within the internal body cavity or organ.

US Patent:

49111485, Mar 27, 1990

Filed:

Mar 14, 1989

Appl. No.:

7/323304

Inventors:

Stephen A. Sosnowski - Oceanside CA
Nadhir B. Kosa - San Diego CA
Steven W. Kovalcheck - San Diego CA
John H. Parrish - La Jolla CA

Assignee:

Intramed Laboratories, Inc. - San Diego CA

International Classification:

A61B 106

US Classification:

128 6

Abstract:

An endoscope having a deflectable tip configured so as to have a small outer diameter of approximately 0. 15 inch or less. The endoscope includes a flexible shaft subassembly comprised of a conduit having a deflectable end segment at its distal end which can be controlled by a manually operable mechanism on a handle subassembly. The shaft subassembly further includes a cone subassembly at its proximal end including means for structurally connecting to the handle subassembly. Illumination fibers, an imaging fiber, a pull wire and a working channel extend through the shaft subassembly from its distal end to terminals in the cone subassembly for interfacing to the handle subassembly. The handle subassembly comprises an optical component which allows for the viewing of an image emanating from the shaft subassembly imaging fiber, a deflection mechanism which incorporates a means for physical attachment and axial displacement of the shaft subassembly pull wire, and a locking mechanism for attaching the shaft subassembly to the handle subassembly.