Surgery – Instruments – Cyrogenic application
Reexamination Certificate
2006-04-11
2006-04-11
Leubecker, John P. (Department: 3739)
Surgery
Instruments
Cyrogenic application
C606S021000, C606S023000, C606S024000, C600S104000
Reexamination Certificate
active
07025762
ABSTRACT:
A method and apparatus to treat Barrett's tissue, a pre-cancerous condition, by removing the epithelium above the lower esophageal sphincter through cryo-ablation. An endoscope with fiber optics is used to view the operation, and a catheter for supplying liquid nitrogen is passed through the lumen of the endoscope. Liquid nitrogen at low pressure is sprayed directly onto the Barrett's tissue through the catheter while the physician views the operation through the fiberoptics of the endoscope and controls the spray via a valve. Freezing is indicated by whiteness and shows that the epithelium has been cryoablated. The apparatus can also be used to treat various other gastrointestinal tract lesions. The catheter is insulated to withstand extremely cold temperatures without becoming stiff and without affecting the inherent flexibility and maneuverability of the endoscope.
REFERENCES:
patent: 3298371 (1967-01-01), Lee
patent: 3507283 (1970-04-01), Thomas, Jr.
patent: 3823575 (1974-07-01), Parel
patent: 3948269 (1976-04-01), Zimmer
patent: 4116199 (1978-09-01), Bryne
patent: 4202336 (1980-05-01), van Gerven
patent: 4946460 (1990-08-01), Merry et al.
patent: 5152277 (1992-10-01), Honda et al.
patent: 5417653 (1995-05-01), Sahota et al.
patent: 5520682 (1996-05-01), Baust et al.
patent: 5658276 (1997-08-01), Griswold
patent: 5814040 (1998-09-01), Nelson et al.
patent: 5846235 (1998-12-01), Pasricha et al.
patent: 5899897 (1999-05-01), Rabin et al.
patent: 5906612 (1999-05-01), Chinn
patent: 6540740 (2003-04-01), Lehmann et al.
patent: 6562030 (2003-05-01), Abboud et al.
patent: 2001/0009997 (2001-07-01), Pope et al.
Sampliner et al,Gastrointestinal Endoscopy, 44:5, pp. 532-535, [1996 ].
Bremner et al,Gastrointestinal Endoscopy, 43:4 (abstract 6) [1996 ].
Overholt et al,Seminars in Surgical Oncology, 11, pp. 372-376, [1995 ].
Ertan et al,American Journal of Gastroenterology, 90:12, pp. 2201-2203, [1995 ].
Rodgers et al,Cryobiology, 22, pp. 86-92, [1985 ].
Heier et al,Gastrointestinal Endoscopy, 43:4, (abstract 185), [1996 ].
Cartledge Jennifer B.
Johnston Mark H.
CryMed Technologies, Inc.
DLA Piper Rudnick Gray Cary US LLP
Leubecker John P.
LandOfFree
Method and apparatus for cryogenic spray ablation of... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for cryogenic spray ablation of..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for cryogenic spray ablation of... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3575550