John S Zhang

US Patent:

7862497, Jan 4, 2011

Filed:

Nov 5, 2007

Appl. No.:

11/935348

Inventors:

L. Michael Cutrer - Huntington Beach CA, US
Fredrick Wintch - Snohomish WA, US
Richard A. Terwilliger - Venice CA, US
John Zhang - Lake Forest Park WA, US
David Bossi - Simi Valley CA, US

Assignee:

Portola Medical, Inc. - Portola Valley CA

International Classification:

A61N 5/00

US Classification:

600 3

Abstract:

A brachytherapy device may include a plurality of rods, each configured to move between a straightened position and a bowed position, the plurality of rods configured to collectively form a shaft while each rod is in the straightened position and to collectively form at least one cage while at least some of the rods are in the bowed position, at least some of the rods having lumens that are configured to receive and hold radioactive material. A brachytherapy device may further include a rotatable mechanism configured to cause at least some of the plurality of rods to move between the straightened position and the bowed position upon rotation of the rotatable mechanism.

US Patent:

8137256, Mar 20, 2012

Filed:

Dec 16, 2005

Appl. No.:

11/305437

Inventors:

L. Michael Cutrer - Chatsworth CA, US
Richard A. Terwilliger - Venice CA, US
Fredrick Winch - Snohomish WA, US
John Zhang - Lake Forest Park WA, US
Wayne Higgins - Seattle WA, US
Terence Ellard - Seattle WA, US
David Bossi - Simi Valley CA, US

Assignee:

Portola Medical, Inc. - Portola Valley CA

International Classification:

A61N 5/00

US Classification:

600 3

Abstract:

The present disclosure provides a brachytherapy apparatus that delivers a low dose, partial breast irradiation treatment for post-lumpectomy patients via introduction of a catheter-like device through a cannula. The apparatus may be introduced post-surgically with local anesthesia under image guidance into the previous excision site and into a cavity by a surgeon. The brachytherapy apparatus includes a seed containment device configured to contain a plurality of low-dose radioactive seeds therein. The seed containment device may be one or more thin-walled tubes. The apparatus is further configured to expand so that at least a portion of the seed containment device is positioned against the remaining tissue and the plurality of radioactive seeds are disposed at the perimeter of the seed containment device. Also described are various clamps for the apparatus, and sleeves for adjusting the size of the device to fit a cavity when the apparatus is in use.

US Patent:

8226539, Jul 24, 2012

Filed:

Sep 4, 2009

Appl. No.:

12/554732

Inventors:

L. Michael Cutrer - Huntington Beach CA, US
Richard A. Terwilliger - Grants Pass OR, US
Fredrick W. Winch - Snohomish WA, US
John Zhang - Lake Forest Park WA, US
Wayne Higgins - Malden MA, US
Terence Ellard - Seattle WA, US
David Bossi - Simi Valley CA, US

Assignee:

Portola Medical, Inc. - Portola Valley CA

International Classification:

A61N 5/00

US Classification:

600 3

Abstract:

The present disclosure provides a brachytherapy apparatus, system and method that delivers partial breast irradiation treatment for post-lumpectomy patients via introduction of a catheter-like device through a trocar. The apparatus may be introduced post-surgically with local anesthesia under image guidance into the previous excision site and into a cavity by a surgeon. The brachytherapy apparatus includes one or more thin-walled tubes, each of said thin-walled tubes being configured to contain one or more radioactive sources, at least one radiation source configured to deliver a prescribed dose of radiation, a whisk adjuster configured to permit adjustment of each of the one or more thin-walled tubes so that the tubes substantially conform to a size of the body cavity; and an expansion element configured to expand outwardly said one or more thin-walled tubes within the cavity so that the thin-walled tubes substantially conform to a shape and/or size of the body cavity.

US Patent:

20070270627, Nov 22, 2007

Filed:

Apr 21, 2006

Appl. No.:

11/379739

Inventors:

L. Cutrer - Chatsworth CA, US
Richard Terwilliger - Venice CA, US
Fredrick Wintch - Snohomish WA, US
John Zhang - Lake Forest Park WA, US
Wayne Higgins - Malden MA, US
Terence Ellard - Seattle WA, US
David Bossi - Simi Valley CA, US

International Classification:

A61M 36/12

US Classification:

600007000

Abstract:

The present disclosure provides a brachytherapy apparatus, system and method that delivers partial breast irradiation treatment for post-lumpectomy patients via introduction of a catheter-like device through a trocar. The apparatus may be introduced post-surgically with local anesthesia under image guidance into the previous excision site and into a cavity by a surgeon. The brachytherapy apparatus includes one or more thin-walled tubes, each of said thin-walled tubes being configured to contain one or more radioactive sources, at least one radiation source configured to deliver a prescribed dose of radiation, a whisk adjuster configured to permit adjustment of each of the one or more thin-walled tubes so that the tubes substantially conform to a size of the body cavity; and an expansion element configured to expand outwardly said one or more thin-walled tubes within the cavity so that the thin-walled tubes substantially conform to a shape and/or size of the body cavity.