DOUGLAS O CHINN, MD PC
Urology in Arcadia, CA

5976092, Nov 2, 1999

Jun 15, 1998

9/097400

Douglas O. Chinn - Arcadia CA

A61B 800

600459

A stereotactic surgical guide to be coupled to the shaft of a conventional ultrasonic probe for use during cryosurgery to enable a surgeon to easily, efficiently and accurately position one or more cryosurgical probes in the body of the patient for producing iceballs to kill cancer cells at a localized tissue area. The stereotactic surgical guide includes a laser carrying plate that carries a laser and is coupled to a worm drive. The distance between the ultrasonic probe and the organ in need of treatment is visually determined on the monitor of an ultrasound machine, and the worm drive is rotated to cause the laser carrying plate to move a corresponding distance, whereby the laser will be positioned in spaced opposing alignment with the organ. The laser is then energized and a light beam aimed towards the patient's body to establish a target through which the cryosurgical probe will be inserted to penetrate the body.

7524288, Apr 28, 2009

Feb 22, 2005

11/062218

Douglas O. Chinn - Arcadia CA, US

A61B 8/00

600439

A holder for a conventional high intensity focused ultrasound (HIFU) probe to be interfaced with a stepper atop a conventional tripod, or the like, to enable a physician/surgeon to image and visually inspect the rectal and prostate areas of a patient for signs of cancer and other abnormalities so that a treatment plan can be outlined and implemented. The probe holder includes a base, a pair of wall members detachably connected to one another at the front end of the base, and a pair of stand members detachably connected to one another at the rear end of the base. A first opening is formed between the pair of wall members to enclose and reliably support the proximal end of the probe. A second opening is formed between the pair of stand members to enclose and reliably support the distal end of the probe. A continuous cable passageway is established at the rear end of the base and past the lower stand member to permit the power cable to the probe to rotate freely in the event that the probe is correspondingly rotated relative to the base.

5906612, May 25, 1999

Sep 19, 1997

8/934497

Douglas O. Chinn - Arcadia CA

A61B 1736

606 20

A cryosurgical probe and method for treating cancer by cryosurgically destroying cancer cells by way of an ice ball formed at the distal end of the cryosurgical probe being located in proximity to the cancerous tissue to be treated. The probe is surrounded by a thermally insulating sheath. By varying the length and thickness of the thermally insulating sheath as well as the length of the unsheathed distal tip of the probe, the size and shape of the ice ball produced by the cryosurgical probe can be controllably tailored to correspond to the size, shape and location of the cancerous tissue so as to localize the cryogenic effect. Alternatively, the size and shape of the ice ball can be controlled by surrounding the cryosurgical probe with a heated sheath having a heating element and a temperature sensor to detect the temperature to which the sheath is heated.

2002008, Jul 4, 2002

Jan 4, 2001

09/755956

Paul Mikus - Aliso Viejo CA, US
Sanford Damasco - Irvine CA, US
Douglas Chinn - Arcadia CA, US
Gregory Kelly - Margarita CA, US

Endocare, Inc.

A61B018/02

606/021000

Apparatus and methods are provided for placing an introducer sheath into a subcutaneous tissue region, such as a prostate, e.g., to facilitate insertion of a cryogenic probe. In one embodiment, a dilation apparatus is provided that includes an introducer sheath containing a dilator that, in turn, contains a stylet. A pointed tip of the stylet is inserted into a patient's skin and the dilator is advanced over the inserted stylet to dilate surrounding tissue. The introducer sheath is then advanced over the dilator through the tissue to provide access to a target tissue region, such as the prostate. The stylet and dilator are removed from the introducer sheath, leaving the introducer sheath in place. A cryogenic probe may be inserted into the introducer sheath, and may be coupled to a cryosurgical system, e.g., to ablate or otherwise treat the target tissue region.

2006011, Jun 8, 2006

Dec 6, 2004

11/003971

Douglas Chinn - Arcadia CA, US

A61B 18/04, A61B 18/18, A61F 7/00, A61F 7/12, A61B 19/00

128898000, 607105000, 607113000, 606027000, 606041000

A tissue protective system and method having particular application in thermoablative surgical therapies where heat or cold is used to create a kill zone for treating cancer cells as well as malignant or benign tumors in a targeted internal tissue area (e.g., the prostate) of a patient while sparing an adjacent benign internal tissue area (e.g., a neurovascular bundle). One of a hollow sheath or a balloon that is carried by a balloon catheter is located within an access opening that is made by a needle trocar inserted between the targeted tissue area in need of treatment and the benign tissue area to be protected in order to hold the protected tissue area off the targeted tissue area and away from the lethal temperature of the kill zone. The balloon of the balloon catheter is inflated in the access opening via a balloon channel which runs longitudinally through the catheter. At least one temperature sensor is mounted on the balloon and responsive to the temperature near the benign tissue area to be protected. Heat or cold is provided to the balloon from a heating wire or a circulating fluid, depending upon the temperature that is sensed by the temperature sensor.

2008022, Sep 18, 2008

May 22, 2008

12/154545

Douglas O. Chinn - Arcadia CA, US

A61B 18/04, A61B 18/18, A61F 7/00, A61F 7/12

128898, 606 27, 606 41, 607105, 607113

A tissue protective system and method having particular application in thermoablative surgical therapies where heat or cold is used to create a kill zone for treating cancer cells as well as malignant or benign tumors in a targeted internal tissue area (e.g., the prostate) of a patient while sparing an adjacent benign internal tissue area (e.g., a neurovascular bundle). One of a hollow sheath or a balloon that is carried by a balloon catheter is located within an access opening that is made by a needle trocar inserted between the targeted tissue area in need of treatment and the benign tissue area to be protected in order to hold the protected tissue area off the targeted tissue area and away from the lethal temperature of the kill zone. The balloon of the balloon catheter is inflated in the access opening via a balloon channel which runs longitudinally through the catheter. At least one temperature sensor is mounted on the balloon and responsive to the temperature near the benign tissue area to be protected. Heat or cold is provided to the balloon from a heating wire or a circulating fluid, depending upon the temperature that is sensed by the temperature sensor.

5647868, Jul 15, 1997

Apr 28, 1995

8/430294

Douglas Owen Chinn - Arcadia CA

A61B 1736

606 21

The present cryosurgical system and method accurately locates relative to a defined internal area of a living body, an ultrasonic probe and, using stereotactic guide, a series of cooling probes and temperature probes, then presents in the same visual field an integrated ultrasonic display and temperature display to assist the surgeon in accurately sculpting and limiting the field of cooling.