Patent US5833685A successfully refreshed from Google Patents.
US5833685A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cryosurgical technique and devices
Assignee: Individual
•
Filing: 1995-09-15
•
Granted: 1998-11-10
•
Expires: 2015-09-15
Abstract
Abstract Devices and method for freezing of tissues. Devices comprise a cryosurgical probe that can be very slim with diameter up to a fraction of a millimeter for very focal freezing application, and an insulating canula for adjusting freeze zone. A cryosurgical probe with solid and liquid cold sources, wherein the solid cold source forms the portion of the probe inserted to tissue for thermal exchange while the liquid cold source maintains the operating temperature of said solid cold source. Method for rupturing targeted cells during freezing while minimizing freezing of nearby tissues and vasculatures.
Inventors
- 👤 Proserfina R. Tortal
- 👤 Grace Tortal-Quirong
- 👤 Rolando A. Quirong
- 👤 Eleazar R. Tortal
- 👤 Jocelyn Fonacier Tortal
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:23
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/02; A61B2018/0231; A61B2018/0262; Y; Y10; Y10S; Y10S128/00; Y10S128/27
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
143 words
A cryosurgical device for freezing of tissues comprising: a cylindrical vacuum walled handle; a solid cold source having a length with a proximal end and a distal end, wherein an insulating tube circumscribes the length of the solid cold source with the exception of a freeze zone and a thermal heat exchange area, and further wherein the proximal end of the solid cold source including the heat exchange area is located within the handle and the distal end is adapted to contact and freeze tissue; a thermoconductive parabolic tube located within the handle and in contact with the thermal heat exchange area of the solid cold source; and a liquid cold source connected to the parabolic tube such that the liquid cold source circulates a coolant in contact with the solid cold source to maintain the operating temperature of the solid cold source.
Claim 2
Dependent Claim
143 words
A cryosurgical device for freezing of tissues comprising: a cylindrical vacuum walled handle; a solid cold source having a length with a proximal end and a distal end, wherein an insulating tube circumscribes the length of the solid cold source with the exception of a freeze zone and a thermal heat exchange area, and further wherein the proximal end of the solid cold source including the heat exchange area is located within the handle and the distal end is adapted to contact and freeze tissue; a thermoconductive parabolic tube located within the handle and in contact with the thermal heat exchange area of the solid cold source; and a liquid cold source connected to the parabolic tube such that the liquid cold source circulates a coolant in contact with the solid cold source to maintain the operating temperature of the solid cold source.
Claim 3
Dependent Claim
25 words
A cryosurgical device as in claim 1 wherein said solid cold source is in the shape of a slender rod that extends from the handle.
Claim 4
Dependent Claim
14 words
A cryosurgical device as in 1 wherein said solid cold source is carbon dioxide.
Claim 5
Dependent Claim
14 words
A cryosurgical device as in 1 wherein said solid cold source is carbon dioxide.
Claim 6
Dependent Claim
17 words
A cryosurgical device as in claim 3 wherein said carbon dioxide is at -196° C. or below.
Claim 7
Dependent Claim
15 words
A cryosurgical device as in claim 1 where said liquid cold source is liquid nitrogen.
Claim 8
Dependent Claim
28 words
A cryosurgical device as in claim 1 wherein said parabolic tube is made from a thermoconductive material chosen from the group of thermoconductive polyester, stainless steel or copper.
Claim 9
Dependent Claim
32 words
A cryosurgical device as in claim 6 wherein the vertex of the parabolic tube is in contact with the proximal end of the solid cold source at the thermal heat exchange area.
Claim 10
Dependent Claim
49 words
A cryosurgical device as in claim 6 wherein one end of the parabolic tube receives liquid nitrogen from a high pressure chamber of a liquid nitrogen storage pump, and the opposite end of the parabolic tube returns the liquid nitrogen to a low pressure chamber of the storage pump.
Claim 11
Dependent Claim
25 words
A cryosurgical device as in claim 1 wherein the insulating tube consists of polyurethane lined with polyethylene on an inside surface of the insulating tube.
Claim 12
Dependent Claim
44 words
A cryosurgical device as in claim 1 wherein the insulating tube is in the shape of a hollow rod adapted for bayonet coupling with the solid cold source, and further wherein the insulating tube tapers in proximity to the distal end of the tube.
Claim 13
Dependent Claim
49 words
A cryosurgical device as in claim 1 wherein the handle includes a distal base with an opening for bayonet coupling with the proximal portion of the insulating tube, and a proximal base which includes two openings through which an inlet and an outlet portion of said parabolic tube pass.
Claim 14
Dependent Claim
41 words
A cryosurgical device as in claim 1 and further including an insulating cannula for guiding the freeze zone of the solid cold source to tissue, the cannula including a lumen through which the solid cold source and insulating tube are inserted.
Claim 15
Dependent Claim
32 words
A cryosurgical device as in claim 12 wherein the insulating cannula is in the shape of a hollow rod with open ends, the hollow rod further being tapered toward a distal end.
Claim 16
Dependent Claim
21 words
A cryosurgical device as in claim 12 wherein the insulating cannula consists of polyurethane lined with polyethylene on an inside surface.
References Cited (Backward Citations)
US3298371A
Cited
US3421508A
Cited
US3948269A
Cited
US4275734A
Cited
US5108390A
Cited
GB2236253A
Cited
US5254116A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2001-11-09 | 2002-05-11 | 2002-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2005-11-09 | 2006-05-11 | 2006-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2009-11-09 | 2010-05-11 | 2010-11-10 | $7700.00 | Window Closed / Lapsed |