Electrosurgical generator

Details Electrosurgical generator Electrosurgical generator

2007-05-01

2007-05-01

Peffley, Michael (Department: 3739)

Surgery

Instruments

Electrical application

C606S039000, C606S040000

Reexamination Certificate

active

10743095

ABSTRACT:
An electrosurgical generator for supplying RF power to an electrosurgical instrument for cutting or vaporising tissue has an RF output stage (42) with an RF power bridge (Q1, Q2, Q3, Q4), a pair of output lines (74) and a series-resonant output network (48). The output impedance of the output stage (42) at the output lines (74) is less than 200/√P ohms, where P is the maximum continuous RF output power of the generator. The generator offers improved cutting and vaporising performance, especially in relation to the reliability with which an arc can be struck when presented with an initial low impedance load. Overloading of the output stage is prevented by rapidly operating protection circuitry responsive to a predetermined electrical condition such as a substantial short-circuit across the output lines. In the preferred embodiment, the output stage is capable of maintaining output pulses at least 1kW peak by supplying the power bridge from a large reservoir capacitor (60). Pulsing is dynamically variable in response to load conditions by controlling the maximum energy per pulse in response to the reservoir capacitor voltage.

REFERENCES:
patent: 3685518 (1972-08-01), Beuerle et al.
patent: 3768482 (1973-10-01), Shaw
patent: 4038984 (1977-08-01), Sittner
patent: 4092986 (1978-06-01), Schneiderman
patent: 4117846 (1978-10-01), Williams
patent: 4188927 (1980-02-01), Harris
patent: 4492231 (1985-01-01), Auth
patent: 4517976 (1985-05-01), Murakoshi et al.
patent: 4543474 (1985-09-01), Horsma et al.
patent: 4590934 (1986-05-01), Malis et al.
patent: 4727874 (1988-03-01), Bowers et al.
patent: 5067953 (1991-11-01), Feucht
patent: 5122137 (1992-06-01), Lennox
patent: 5134356 (1992-07-01), El-Sharkawi et al.
patent: 5318563 (1994-06-01), Malis et al.
patent: 5346491 (1994-09-01), Oertli
patent: 5423810 (1995-06-01), Goble et al.
patent: 5445638 (1995-08-01), Rydell et al.
patent: 5451224 (1995-09-01), Goble et al.
patent: 5496312 (1996-03-01), Klicek
patent: 5496313 (1996-03-01), Gentelia et al.
patent: 5628771 (1997-05-01), Mizukawa et al.
patent: 5693045 (1997-12-01), Eggers
patent: 5716366 (1998-02-01), Yates
patent: 5720744 (1998-02-01), Eggleston et al.
patent: 5757445 (1998-05-01), Vu et al.
patent: 5766153 (1998-06-01), Eggers et al.
patent: 5836943 (1998-11-01), Miller, III
patent: 5885281 (1999-03-01), Urueta
patent: 5931836 (1999-08-01), Hatta et al.
patent: 6033399 (2000-03-01), Gines
patent: 6074386 (2000-06-01), Goble et al.
patent: 6093186 (2000-07-01), Goble
patent: 6106524 (2000-08-01), Eggers et al.
patent: 6132426 (2000-10-01), Kroll
patent: 6142992 (2000-11-01), Cheng et al.
patent: 6228080 (2001-05-01), Gines
patent: 6228081 (2001-05-01), Goble
patent: 6235020 (2001-05-01), Cheng et al.
patent: 6296636 (2001-10-01), Cheng et al.
patent: 6398779 (2002-06-01), Buysse et al.
patent: 6413255 (2002-07-01), Stern
patent: 2002/0052599 (1992-06-01), Goble
patent: 2002/0097042 (2002-07-01), Kawate et al.
patent: 2002/0165530 (2002-11-01), Harano et al.
patent: 2003/0069579 (2003-04-01), Truckai et al.
patent: 2003/0078573 (2003-04-01), Truckai et al.
patent: 2003/0078577 (2003-04-01), Truckai et al.
patent: 2003/0078578 (2003-04-01), Truckai et al.
patent: 2004/0030329 (2004-02-01), Hagg
patent: 2005/0177150 (2005-01-01), Amoah et al.
patent: 0 247 717 (1987-12-01), None
patent: 0 386 425 (1990-09-01), None
patent: 0 517 243 (1992-09-01), None
patent: 0 694 290 (1996-01-01), None
patent: 0 754 437 (1997-01-01), None
patent: 1 034 746 (2000-09-01), None
patent: 1 053 719 (2000-11-01), None
patent: 1 157 667 (2001-11-01), None
patent: 1 053 720 (2002-11-01), None
patent: WO 96/14021 (1996-05-01), None
patent: WO 97/24073 (1997-07-01), None
patent: WO 98/27880 (1998-07-01), None
patent: WO 99/20213 (1999-04-01), None
patent: WO 00/54683 (2000-09-01), None
patent: WO 02/21992 (2000-11-01), None
patent: WO 02/36028 (2002-05-01), None
patent: WO 02/53048 (2002-07-01), None
U.S. Appl. No. 09/984,252, filed Oct. 29, 2001, Goble.
U.S. Appl. No. 10/186,710, filed Jul. 2, 2002, Goble.

Affiliated with

Also associated with

Rating

Electrosurgical generator does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Electrosurgical generator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electrosurgical generator will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3724950