Patent US4924291A successfully refreshed from Google Patents.
Patent US5312331A successfully refreshed from Google Patents.
US5312331A
Expired / Lapsed
US
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Method and apparatus for talc pleurodesis
Assignee: NuSurg Medical Inc
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Filing: 1993-04-15
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Granted: 1994-05-17
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Expires: 2013-04-15
Abstract
Abstract An apparatus for conducting a talc pleurodesis includes a thoracic tube which includes a talc chamber. At one end of said tube is a rubber bulb. In the opposite end of the tube is a tip that includes a constriction or valve. Talc is placed into the talc chamber and the tip is inserted into the chest cavity between the lung and the chest cavity. The bulb is then pressed forcing air through the tube and forcing talc into the chest cavity. The constriction prevents the talc from free flowing through the end of the tube. However, the constriction is such that under pressurized air, the talc can flow from the tip. This permits pleurodesis to be conducted with dry talc very easily and evenly under direct vision with the aid of a thorascope.
Inventors
- 👤 Dennis J. Knoepfler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 18:42
CPC Classifications
A; A61; A61M; A61M31/00; A61B; A61B17/00; A61B17/00234
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
150 words
An apparatus for applying powdered talc in a chest cavity comprising: an elongated tube having a first end and a second end opposite said first end and a talc chamber means intermediate said first and second ends, said talc chamber means containing powdered talc for performing a pleurodesis procedure on a patient; means at said second end to force air from said second end to said first end; and, a constriction formed in an outlet chamber means at said first end which prevents said powdered talc from flowing out of said first end except when pressurized air is forced through said tube, said constriction being formed by a plug centrally disposed in said outlet chamber means said plug including spaced axial ridges on an outer surface thereof which define a plurality of restricted pathways between said outer surface of said plug and an inner wall of said outlet chamber means.
Claim 2
Independent Claim
150 words
An apparatus for applying powdered talc in a chest cavity comprising: an elongated tube having a first end and a second end opposite said first end and a talc chamber means intermediate said first and second ends, said talc chamber means containing powdered talc for performing a pleurodesis procedure on a patient; means at said second end to force air from said second end to said first end; and, a constriction formed in an outlet chamber means at said first end which prevents said powdered talc from flowing out of said first end except when pressurized air is forced through said tube, said constriction being formed by a plug centrally disposed in said outlet chamber means said plug including spaced axial ridges on an outer surface thereof which define a plurality of restricted pathways between said outer surface of said plug and an inner wall of said outlet chamber means.
Claim 3
Dependent Claim
23 words
The apparatus claimed in claim 1 wherein said talc chamber means is immediately downstream of said means to force air through said tube.
Claim 4
Dependent Claim
22 words
The apparatus claimed in claim 2 wherein said talc chamber means includes an access opening and means to seal said access opening.
Claim 5
Dependent Claim
28 words
The apparatus claimed in claim 1 wherein said plug is a cylindrical member and wherein said outlet chamber means includes axial flutes disposed on said inner wall thereof.
Claim 6
Independent Claim
138 words
A method of conducting a pleurodesis comprising: forming an incision to access an area between a patient's chest cavity and lung and draining fluid within said area; inserting a rigid tube into said incision wherein a tip of said tube is between a surface of said lung and said chest cavity to coat the pleuro; placing powdered talc into said tube, permitting said talc to flow to said tip by gravity force and preventing the flow of said talc from exiting said tube through said tip by providing an obstruction of an outlet opening of said tip; forcing air through said tube to force talc out of said outlet opening of said tip and into said area by compressing a bulb attached to a second end of said tube to force air in said bulb through said tube.
Claim 7
Independent Claim
138 words
A method of conducting a pleurodesis comprising: forming an incision to access an area between a patient's chest cavity and lung and draining fluid within said area; inserting a rigid tube into said incision wherein a tip of said tube is between a surface of said lung and said chest cavity to coat the pleuro; placing powdered talc into said tube, permitting said talc to flow to said tip by gravity force and preventing the flow of said talc from exiting said tube through said tip by providing an obstruction of an outlet opening of said tip; forcing air through said tube to force talc out of said outlet opening of said tip and into said area by compressing a bulb attached to a second end of said tube to force air in said bulb through said tube.
Claim 8
Dependent Claim
46 words
The method of claim 5 further comprising the step of: adding additional talc into said tube and forcing air through said tube again to force said talc into said cavity wherein at least about 1 to about 10 grams of talc is injected into said area.
Claim 9
Dependent Claim
44 words
The method of claim 5 wherein said obstruction is a plug disposed within said tip and having spaced axial ridges on an outer surface thereof and said step of forcing air through said tube further comprises forcing said talc between said spaced axial ridges.
Claim 10
Dependent Claim
51 words
The method of claim 7 wherein said tip includes an inner surface having axial flutes disposed thereon and the step of forcing air through said tube further comprises: forcing talc between said axial flutes as well as between said flutes and said ridges and out said outlet opening of said tip.
References Cited (Backward Citations)
US1732566A
Cited
DE619625C
Cited
US2122234A
Cited
US2570774A
Cited
US2754097A
Cited
FR2608930A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-05-16 | 1997-11-15 | 1998-05-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-05-16 | 2001-11-15 | 2002-05-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-05-16 | 2005-11-15 | 2006-05-17 | $7700.00 | Window Closed / Lapsed |