Robert C Dahla, Age 84PO Box 1042, Alamo, CA 94507
Robert Dahla Phones & Addresses
Alamo, CA
1342 Hollenbeck Ave, Sunnyvale, CA 94087 (408) 730-9793
1798 Magnolia Cir, Pleasanton, CA 94566 (925) 399-5538 (925) 462-9734 (925) 462-9784
Danville, CA
San Ramon, CA
Santa Clara, CA
San Leandro, CA
Mentions for Robert C Dahla
Publications & IP owners
Us Patents
Electrosurgical Ablation And Aspiration Apparatus Having Flow Directing Feature And Methods Related Thereto
US Patent:
6949096, Sep 27, 2005
Filed:
Jan 21, 2003
Appl. No.:
10/264308
Inventors:
Terry S. Davison - Redwood City CA, US
Theodore C. Ormsby - Escondido CA, US
Jean Woloszko - Mountain View CA, US
Robert H. Dahla - Sunnyvale CA, US
Theodore C. Ormsby - Escondido CA, US
Jean Woloszko - Mountain View CA, US
Robert H. Dahla - Sunnyvale CA, US
Assignee:
Arthrocare Corporation - Austin TX
International Classification:
A61B018/14
US Classification:
606 41, 604 35
Abstract:
Electrosurgical methods, systems, and apparatus for the controlled ablation of tissue from a target site of a patient. An electrosurgical apparatus of the invention includes an active electrode assembly having an active electrode screen surrounded by a plurality of flow protectors. Each flow protector defines a shielded region of the active electrode screen, each shielded region of the screen characterized by enhanced plasma formation. The active electrode assembly is adapted for removing tissue from a surgical site, and the active electrode screen is adapted for digesting fragments of resected tissue. In one embodiment, the apparatus is particularly suited to simultaneously removing both hard and soft tissue in, or around, a joint.
Electrosurgical Apparatus And Methods For Treatment And Removal Of Tissue
US Patent:
7186234, Mar 6, 2007
Filed:
Feb 5, 2002
Appl. No.:
10/072599
Inventors:
Robert H. Dahla - Sunnyvale CA, US
Jean Woloszko - Austin TX, US
Jean Woloszko - Austin TX, US
Assignee:
ArthroCare Corporation - Austin TX
International Classification:
A61B 17/20
US Classification:
604 22, 606 32
Abstract:
Apparatus and methods for ablating, severing, cutting, shrinking, coagulating, or otherwise modifying a target tissue to be treated. In a method for treating a target tissue, an active electrode of an electrosurgical probe is positioned in at least close proximity to the target tissue in the presence of an electrically conductive fluid. A high frequency voltage is then applied between the active electrode and a return electrode, wherein, the high frequency voltage is sufficient to volumetrically remove (ablate), sever, or modify at least a portion of the target tissue. The probe comprises a multi-lumen shaft having a plurality of internal lumens, and a return electrode coil oriented substantially parallel to the shaft distal end. The active electrode may be in the form of a metal disc, a hook, or an active electrode coil. In the latter embodiment, the active electrode coil is typically arranged substantially orthogonal to the return electrode coil.
Electrosurgical Apparatus And Methods For Treatment And Removal Of Tissue
US Patent:
7270661, Sep 18, 2007
Filed:
Feb 5, 2002
Appl. No.:
10/068533
Inventors:
Robert H. Dahla - Mountain View CA, US
Jean Woloszko - Austin TX, US
Jean Woloszko - Austin TX, US
Assignee:
ArthoCare Corporation - Austin TX
International Classification:
A61B 18/18
US Classification:
606 41, 606 48
Abstract:
Apparatus and methods for ablating, severing, cutting, shrinking, coagulating, or otherwise modifying a target tissue to be treated. In a method for treating a target tissue, an active electrode of an electrosurgical probe is positioned in at least close proximity to the target tissue in the presence of an electrically conductive fluid. A high frequency voltage is then applied between the active electrode and a return electrode, wherein, the high frequency voltage is sufficient to volumetrically remove (ablate), sever, or modify at least a portion of the target tissue. The probe comprises a multi-lumen shaft having a plurality of internal lumens, and a return electrode coil oriented substantially parallel to the shaft distal end. The active electrode may be in the form of a metal disc, a hook, or an active electrode coil. In the latter embodiment, the active electrode coil is typically arranged substantially orthogonal to the return electrode coil.
Temperature Indicating Electrosurgical Apparatus And Methods
US Patent:
7297143, Nov 20, 2007
Filed:
Feb 5, 2004
Appl. No.:
10/774222
Inventors:
Jean Woloszko - Austin TX, US
Robert H. Dahla - Sunnyvale CA, US
Michael A. Baker - Austin TX, US
James L. Pacek - Lakeway TX, US
Robert H. Dahla - Sunnyvale CA, US
Michael A. Baker - Austin TX, US
James L. Pacek - Lakeway TX, US
Assignee:
ArthroCare Corporation - Austin TX
International Classification:
A61B 18/18
A61B 5/00
A61B 5/00
US Classification:
606 41, 607102
Abstract:
Systems, apparatus, and methods for monitoring temperature at a region near a surgical site during a procedure. A temperature-indicating element of an electrosurgical device comprises an indicator composition adapted to undergo a change in appearance in response to a pre-defined temperature range. The change in appearance of the temperature-indicating element indicates to the operator of the device a temperature condition at the working end of the device.
Electrosurgical Probe With Movable Return Electrode And Methods Related Thereto
US Patent:
7419488, Sep 2, 2008
Filed:
Jan 3, 2005
Appl. No.:
11/028709
Inventors:
Scott A. Ciarrocca - Stockton NJ, US
Francois Antounian - San Francisco CA, US
Jean Woloszko - Austin TX, US
Robert H. Dahla - Sunnyvale CA, US
Francois Antounian - San Francisco CA, US
Jean Woloszko - Austin TX, US
Robert H. Dahla - Sunnyvale CA, US
Assignee:
ArthroCare Corporation - Austin TX
International Classification:
A61B 18/14
US Classification:
606 41, 606 32, 606 48, 606 49, 606 50
Abstract:
The present invention provides systems, apparatus, and methods for dissecting, resecting, severing, cutting, contracting, coagulating, or otherwise modifying a tissue or organ of a patient. An apparatus of the invention includes an electrosurgical probe configurable between an open configuration and a closed configuration, the probe including an active electrode terminal, a fixed return electrode disposed proximal to the active electrode terminal, and a movable return electrode configured to move linearly with respect to the active electrode terminal between the open configuration and the closed configuration. A method of the present invention comprises clamping a blood vessel between the active electrode terminal and the movable return electrode, coagulating the clamped blood vessel by application of a first high frequency voltage, and severing the coagulated blood vessel by application of a second high frequency voltage.
Systems And Methods For Electrosurgical Tissue Treatment
US Patent:
7435247, Oct 14, 2008
Filed:
Jun 27, 2002
Appl. No.:
10/187733
Inventors:
Jean Woloszko - Austin TX, US
Michael A. Baker - Austin TX, US
Robert H. Dahla - Sunnyvale CA, US
Hardev Kahlon - San Jose CA, US
Adelina Villaruel - San Jose CA, US
Cindy Truc Nguyen - San Jose CA, US
Irma Gutierrez - San Jose CA, US
Michael A. Baker - Austin TX, US
Robert H. Dahla - Sunnyvale CA, US
Hardev Kahlon - San Jose CA, US
Adelina Villaruel - San Jose CA, US
Cindy Truc Nguyen - San Jose CA, US
Irma Gutierrez - San Jose CA, US
Assignee:
ArthroCare Corporation - Austin TX
International Classification:
A61B 18/18
US Classification:
606 41
Abstract:
Systems and methods are provided for applying a high frequency voltage in the presence of an electrically conductive fluid. High frequency voltage is then applied between the active electrode(s) and one or more return electrode(s) to volumetrically remove or ablate at least a portion of the target tissue. In one embodiment a tissue treatment surface includes spacers or a chamber for containing the electrodes.
Fuse-Electrode Electrosurgical Apparatus
US Patent:
7632267, Dec 15, 2009
Filed:
Jul 6, 2005
Appl. No.:
11/176803
Inventors:
Robert H. Dahla - Sunnyvale CA, US
Assignee:
ArthroCare Corporation - Austin TX
International Classification:
A61B 18/14
US Classification:
606 41, 606 45, 606 48, 606 49, 606 50
Abstract:
An electrosurgical apparatus for performing a surgical procedure on a target site, comprising a shaft having a distal end portion, the distal end portion comprising an active electrode including a fuse leg, the fuse leg adapted to break and disable the instrument upon applying a voltage differential between the active electrode and a return electrode for a predetermined amount of time. In another embodiment, the present invention is a method of performing an electrosurgical procedure on a target tissue, comprising: placing an electrosurgical instrument in close proximity to the target tissue, the electrosurgical instrument comprising an active electrode having a pre-selected portion adapted to break and disable the instrument upon applying a voltage differential thereto for a working time; and applying the voltage differential.
Rotary Electrosurgical Apparatus And Methods Thereof
US Patent:
8012153, Sep 6, 2011
Filed:
Jul 16, 2004
Appl. No.:
10/565116
Inventors:
Jean Woloszko - Mountain View CA, US
Robert H. Dahla - Sunnyvale CA, US
Robert H. Dahla - Sunnyvale CA, US
Assignee:
ArthroCare Corporation - Austin TX
International Classification:
A61B 18/14
US Classification:
606 48, 606 50
Abstract:
Electrosurgical systems, apparatus, and methods for the controlled removal and treatment of a target tissue. An instrument of the invention includes a rotating member housed longitudinally within a shaft, a tissue removal port disposed at the shaft distal end portion, and an active electrode disposed at the instrument distal end. The active electrode is adapted to electrosurgically remove at least a portion of the target tissue as the rotating member rotates within the shaft. According to alternative embodiments, the active electrode may be disposed on the rotating member or on the shaft.
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