MARK ANDREW RITCHART
Pilots at Eagles Nest Ct, Murrieta, CA

5928164, Jul 27, 1999

Jan 9, 1998

9/004737

Fred H. Burbank - San Juan Capistrano CA
Thomas J. Fogarty - Portola Valley CA
Wayne E. Manska - Anaheim CA
Mark A. Ritchart - Murrieta CA
Timothy J. Ryan - Los Gatos CA
Elias A. Zerhouni - Baltimore MD

Ethicon Endo-Surgery, Inc. - Cincinnati OH

A61B 500

600567

A method and device for the automated biopsy and collection of soft tissue having a piercing needle with a receiving port to trap tissue prior to cutting. A motor drive directs and positions the tissue receiving port at a lesion site in arbitrary positions about and along the longitudinal axis of the device. A cutter advances into the receiving chamber and severs tissue which has prolapsed into the receiving port. The severed tissue is then removed from the receiving port without removing the piercing needle receiving port from the lesion site, thus allowing for the accurate, rapid removal of an arbitrary number of core samples with only one insertion. A tissue sample cassette provides storage for the samples as well as a means for coding and decoding the location from which the samples were obtained. Together, these features allow for more accurate and complete sampling of large lesions, for the complete removal of small lesions or removal of other tissue for a variety of reasons.

2011030, Dec 15, 2011

Jun 15, 2011

13/161182

Jeffrey E. Hull - Midlothian VA, US
Mark A. Ritchart - Murrieta CA, US
David K Wrolstad - Yucaipa CA, US

BAJA RESEARCH , LLC. - San Clemente CA
CAYMUS MEDICAL, INC. - Murreta CA

A61B 17/11

606151

A system for creating an arteriovenous (AV) fistula comprises a vessel access sheath having a hollow interior and an exit port, a side access needle catheter configured to fit within the hollow interior of the sheath, a needle configured to be inserted into a blood vessel through the side access needle catheter, a toggle delivery catheter configured to fit within the hollow interior of the sheath, and a toggle apparatus configured to be delivered into a vessel through the toggle delivery catheter. The toggle apparatus comprises a shaft and a toggle member pivotably attached to a distal end of the shaft. A source of RF energy or resistive heat energy may be provided for application to the toggle member and/or to a heater insert in the toggle delivery catheter, for the purpose of creating the fistula.

5775333, Jul 7, 1998

May 13, 1996

8/645225

Fred H. Burbank - San Juan Capistrano CA
Thomas J. Fogarty - Portola Valley CA
Wayne E. Manska - Anaheim CA
Mark A. Ritchart - Murrieta CA
Timothy J. Ryan - Los Gatos CA
Elias A. Zerhouni - Baltimore MD

Ethicon Endo-Surgery, Inc. - Cincinnati OH

A61B 1000

128754

A method and device for the automated biopsy and collection of soft tissue having a piercing needle with a receiving port to trap tissue prior to cutting. A motor drive directs and positions the tissue receiving port at a lesion site in arbitrary positions about and along the longitudinal axis of the device. A cutter advances into the receiving chamber and severs tissue which has prolapsed into the receiving port. The severed tissue is then removed from the receiving port without removing the piercing needle receiving port from the lesion site, thus allowing for the accurate, rapid removal of an arbitrary number of core samples with only one insertion. A tissue sample cassette provides storage for the samples as well as a means for coding and decoding the location from which the samples were obtained. Together, these features allow for more accurate and complete sampling of large lesions, for the complete removal of small lesions or removal of other tissue for a variety of reasons.

5769086, Jun 23, 1998

Dec 6, 1995

8/568143

Mark A. Ritchart - Murrieta CA
Fred H. Burbank - San Juan Capistrano CA

Biopsys Medical, Inc. - Irvine CA

A61B 1000

128753

An automatic control system for a vacuum-assisted automatic core biopsy device (10) is provided, wherein the automatic core biopsy device (10) comprises a housing (12), out of which extends a needle assembly (14) including a hollow outer piercing needle (16), an inner cutter (18) having a lumen (20), a probe housing (22), and a tissue receiving notch (24). The automatic control system (92) is computerized to move the hollow outer piercing needle (16) automatically to the target tissue lesion, as was true in the prior art, but also is programmed to automatically control the rotational orientation of the piercing needle (16), and its associated tissue receiving notch (24), as well as the axial positioning and rotation of the cutting cannula (18). Consequently, a clinician user need only mark the desired locations within the target location from which tissue samples are desired and the automatic control system will operate the device to retrieve samples from the marked locations.

7887476, Feb 15, 2011

Nov 8, 2006

11/557747

George D. Hermann - Portola Valley CA, US
Gail S. Lebovic - McKinney TX, US
Mark A. Ritchart - Murrieta CA, US

Cianna Medical, Inc. - Aliso Viejo CA

A61N 5/00

600 3, 600 8

Apparatus, systems, and methods are provided for delivering brachytherapy into a target tissue region, e. g. , a breast. In some embodiments, a flexible brachytherapy device is implanted that includes a therapy delivery portion having one or more radioactive sources securely retained thereto, and a tail portion extending from the therapy delivery portion. The brachytherapy device may be implanted in a helical configuration within the target tissue region. To assist in placement and removal of the brachytherapy device, a tubular sheath may be implanted by attaching (e. g. , sliding over) a helically coiled needle that is advanced into the body by screw-like rotation. Once implanted, the sheath and the brachytherapy device may extend outside the body, where they may be folded and secured flat against the skin. The device and sheath may be removed at therapy completion.

2013028, Oct 24, 2013

Feb 8, 2013

13/763501

Brad M. Kellerman - Escondido CA, US
David Trottingwolf Aldridge - Laguna Hills CA, US
David K. Wrolstad - Yucaipa CA, US
Mark A. Ritchart - Murrieta CA, US
Jeffrey E. Hull - Midlothian VA, US
Gene Reu - San Juan Capistrano CA, US

Baja Research, LLC - San Juan Capistrano CA
Caymus Medical, Inc. - San Juan Capistrano CA

A61B 18/04, A61B 18/08

606 29, 606 28

A catheter-based device tracks over a guidewire which has been placed from a first blood vessel into a second blood vessel. The distal tip of the catheter is advanced into the second vessel while a proximal member remains in the first vessel. Matching blunt tapered surfaces on each of the distal tip and the proximal member are clamped together, with adjacent walls of each vessel between them, after which a known, controlled pressure is applied between the two surfaces. Heat energy is then applied to the blunt surfaces for approximately 1-30 seconds to weld the walls of the two vessels together. After coaptation of the vessel walls, the heat is increased to then cut through the vessel walls to create a fistula of the desired size.

6017316, Jan 25, 2000

Jun 18, 1997

8/878468

Mark A. Ritchart - Murrieta CA
Fred H. Burbank - San Juan Capistrano CA
Seth A. Foerster - San Clemente CA
John L. Wardle - San Clemente CA

Biopsys Medical - Irvine CA

A61B 1000

600567

An automatic control system for a vacuum-assisted automatic core biopsy device (10) is provided, wherein the automatic core biopsy device (10) comprises a housing (12), out of which extends a needle assembly (14) including a hollow outer piercing needle (16), an inner cutter (18) having a lumen (20), a probe housing (22), and a tissue receiving notch (24). The automatic control system (92) is computerized to move the hollow outer piercing needle (16) automatically to the target tissue lesion, as was true in the prior art, but also is programmed to automatically control the rotational orientation of the piercing needle (16), and its associated tissue receiving notch (24), as well as the axial positioning and rotation of the cutting cannula (18). Consequently, a clinician user need only mark the desired locations within the target location from which tissue samples are desired and the automatic control system will operate the device to retrieve samples from the marked locations.

6976968, Dec 20, 2005

Jun 28, 2001

09/894356

Mark A. Ritchart - Murrieta CA, US
George White - Diamond Bar CA, US

A61B010/00

600567, 600566, 606167

A tissue sampling apparatus comprises a tubular body having a primary lumen for receiving a tissue sample. The tubular body includes a distal end, a proximal end, and a longitudinal axis extending from the proximal end to the distal end. The tissue sampling apparatus further comprises a cutting cylinder having a distal cutting edge, which is movable both distally and proximally relative to the tubular body. A band having an eyelet disposed therein extends across a distal end of the tissue sampling apparatus, wherein the eyelet is advantageously movable relative to the distal cutting edge in order to sever a distal end of the tissue sample.

2005016, Jul 28, 2005

Dec 12, 2003

10/734671

Seth Foerster - San Clemente CA, US
Fred Burbank - San Juan Capistrano CA, US
Mark Ritchart - Murrieta CA, US
Elias Zerhouni - Baltimore MD, US

A61B006/00, A61B017/34, A61B010/00

600431000, 600562000, 606185000

In order to later identify the location of a biopsy or surgery, various means and methods for permanently and non-surgically marking selected tissue in the human body are used. Later visualization of the markers is readily accomplished using state-of-the-art imaging systems.

5308336, May 3, 1994

Sep 28, 1982

7/952300

Charles C. Hart - Huntington Beach CA
Mark A. Ritchart - Murrieta CA

Applied Medical Resources - Laguna Hills CA

A61M 5178

604167

An access device has an axis extending between a proximal end and an opposing distal end, and properties for facilitating introduction into the body of an instrument having a pointed distal tip. The device includes a housing having walls defining a channel extending through the device and a valve disposed in the housing across the channel and adapted to form a seal around the instrument. The valve includes inner portions defining an aperture to receive the instrument and outer portions extending radially outwardly of the inner portions. Means carried by the housing is positioned to be disposed between the instrument and at least the outer portion of the seal for isolating the seal from the pointed distal tip during insertion of the instrument.