Electro-surgical needle apparatus

Details Electro-surgical needle apparatus Electro-surgical needle apparatus

2011-01-25

2011-01-25

Dvorak, Linda C (Department: 3739)

Surgery

Instruments

Electrical application

C606S032000, C606S034000

Reexamination Certificate

active

07875025

ABSTRACT:
A needle assembly (N) for RF ablation of target tissue in e.g. the liver (L) of a patient comprises a radial array of electrodes (1) in the form of loops which can be expanded by feeding the proximal ends of the Y electrodes along the bore of the needle assembly. An RF power supply (2) is connection between the array of electrodes and a skin pad (P) in contact with the skin (S) of a patient and, in accordance with the invention, is biased by a DC power supply4which generates electro-osmotic and/or electrolytic effects in the target tissue. In particular, chloride ions are discharged to generate chlorine which has a potent cytocidal effect and water can be attracted to the array of electrodes by electro-osmosis, thereby alleviating the problems of low electrical and thermal conductivity encountered with conventional apparatus.

REFERENCES:
patent: 4494539 (1985-01-01), Zenitani et al.
patent: 5328453 (1994-07-01), Sibalis
patent: 5419344 (1995-05-01), DeWitt
patent: 5476481 (1995-12-01), Schondorf
patent: 5536267 (1996-07-01), Edwards et al.
patent: 5567413 (1996-10-01), Klaveness et al.
patent: 5702359 (1997-12-01), Hofmann et al.
patent: 5800484 (1998-09-01), Gough et al.
patent: 5827276 (1998-10-01), LeVeen et al.
patent: 5855576 (1999-01-01), LeVeen et al.
patent: 5857992 (1999-01-01), Haak et al.
patent: 5873849 (1999-02-01), Bernard
patent: 5993434 (1999-11-01), Dev et al.
patent: 6258086 (2001-07-01), Ashley et al.
patent: 6278895 (2001-08-01), Bernard
patent: 6418341 (2002-07-01), Hofmann et al.
patent: 6889089 (2005-05-01), Behl et al.
patent: 7025767 (2006-04-01), Schaefer et al.
patent: 7113821 (2006-09-01), Sun et al.
patent: 7182761 (2007-02-01), Garabedian et al.
patent: 7306595 (2007-12-01), Ostrovsky et al.
patent: 7309336 (2007-12-01), Ashley et al.
patent: 7344518 (2008-03-01), McGuckin et al.
patent: 7344533 (2008-03-01), Pearson et al.
patent: 7412285 (2008-08-01), Schroeppel et al.
patent: 7419487 (2008-09-01), Johnson et al.
patent: 7431720 (2008-10-01), Pendekanti et al.
patent: 7447551 (2008-11-01), Kuo et al.
patent: 2001/0001819 (2001-05-01), Lee et al.
patent: 2001/0012956 (2001-08-01), Behl et al.
patent: 2002/0087112 (2002-07-01), Constantz et al.
patent: 2002/0103515 (2002-08-01), Davey et al.
patent: 2003/0083681 (2003-05-01), Moutafis et al.
patent: 2003/0125660 (2003-07-01), Moutafis et al.
patent: 2004/0025556 (2004-02-01), Klint et al.
patent: 2004/0143259 (2004-07-01), Mulier et al.
patent: 2004/0236320 (2004-11-01), Protsenko et al.
patent: 2005/0165393 (2005-07-01), Eppstein
patent: 2005/0182449 (2005-08-01), Auge et al.
patent: 2005/0197571 (2005-09-01), McVeigh
patent: 2005/0222646 (2005-10-01), Kroll et al.
patent: 2006/0058602 (2006-03-01), Kwiatkowski et al.
patent: 2006/0111705 (2006-05-01), Janzen et al.
patent: 03/026525 (2003-04-01), None
patent: WO 03026525 (2003-04-01), None
Vijh, A.K. “Electrochemical field effects in biological materials: electro-osmotic dewatering of cancerous tissue as the mechanistic proposal for the electrochemical treatment of tumors.” Journal of Materials Science: Materials in Medicine 10 (1999) pp. 419-423.
J.F. Cockburn et al., Bimodal Electric Tissue Ablation (Beta)—In Viv Evaluation of the Effect of Applying Direct Current Before and During Radiofrequency Ablationof Porcine Liver(2007) 62, pp. 213-220.
Christopher Dobbins et al., Bimodal Electric Tissue Ablation-Modified Radiofrequency Ablation With a Le Veen Electrode in a Pig Model; Journal of Sugical Research 144, (2008) pp. 111-116.

Affiliated with

Also associated with

Rating

Electro-surgical needle apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2636921