John Zhang
Medical Practice at 17 Ave, Seattle, WA

2013013, May 23, 2013

Nov 19, 2012

13/680709

Michael Blaivas - Cumming GA, US
Timothy Chinowsky - Seattle WA, US
Kurt Duclos - Kenmore WA, US
John Zhang - Seattle WA, US

A61B 8/14, A61B 8/00

600424

A neuro-vasculature access system and device for placing a cannula adjacent to a nerve. The neuro-vasculature access system and device includes a needle injector pivotally attached to an ultrasound transceiver which is operated to place a sterilizable needle or needle/cannula unit within the neuro-vasculature of a patient by a single user-device operator in which the neuro-vasculature is made visible in a monitor image by ultrasound insonification. A guidance template having an expected path trajectory is overlaid on at least one of a transverse short axis, a longitudinal long axis, or a three-dimensional image of the neuro-vasculature and predicts path of the needle or needle with overlapping cannula when it undergoes movement implemented by a controller located on the needle injector. The needle injector, ultrasound transceiver, and needle or needle/cannula unit may be contained within a flexible sheath capable of being sterilized.

2013013, May 23, 2013

Nov 19, 2012

13/681105

Michael Blaivas - Cumming GA, US
Timothy Chinowsky - Seattle WA, US
Kurt Duclos - Kenmore WA, US
John Zhang - Seattle WA, US

A61M 25/00

604173

A cartridge for use with a blood vessel access system and device. The cartridge includes a slideable needle mount and a slideable cannula mount, the slideable needle mount having a needle in slideable connection with a lumen of a cannula held by the needle mount. The slideable needle mount and the slideable cannula mount are removeably attachable with separate moveable platforms of a needle injector that is pivotally attached to a handheld ultrasound transceiver in signal communication with a computer processing unit connected with a monitor. Upon insonification of a patient's vasculature using the handheld ultrasound transceiver pressed against the surface of the patient, needle injection and subsequent cannulation of a targeted blood vessel appearing on the monitor is accomplished by deploying the needle and cannula from the cartridge via motorization of the moveable platforms that is initiated by the user operating a controller on the device's needle injector.

8226539, Jul 24, 2012

Sep 4, 2009

12/554732

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

Portola Medical, Inc. - Portola Valley CA

A61N 5/00

600 3

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.

2013013, May 23, 2013

Nov 19, 2012

13/680999

Michael Blaivas - Cumming GA, US
Timothy Chinowsky - Seattle WA, US
Kurt Duclos - Kenmore WA, US
John Zhang - Seattle WA, US

A61B 8/14, A61M 5/46, A61B 8/00

600424

An access system and device having a needle injector pivotally attached to an ultrasound transceiver is operated to place a sterilizable needle or needle/cannula unit within a blood vessel by a single user-device operator in which the blood vessel is made visible in a monitor image by ultrasound insonification. A guidance template having an expected path trajectory is overlapped on at least one of a transverse short axis, a longitudinal long axis, or a three-dimensionally imaged blood vessel that illustrates the predicted path of the needle or needle with overlapping cannula when it undergoes movement implemented by a controller located on the needle injector. In alternate embodiments the needle injector, ultrasound transceiver, and needle or needle/cannula unit may be contained within a flexible sheath that is capable of being sterilized.

8137256, Mar 20, 2012

Dec 16, 2005

11/305437

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

Portola Medical, Inc. - Portola Valley CA

A61N 5/00

600 3

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.

7862497, Jan 4, 2011

Nov 5, 2007

11/935348

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

Portola Medical, Inc. - Portola Valley CA

A61N 5/00

600 3

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.