Patent US2501107A successfully refreshed from Google Patents.
Patent US3810471A successfully refreshed from Google Patents.
US3810471A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Surgical aspirating cannula
Assignee: Individual
•
Filing: 1972-03-22
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Granted: 1974-05-14
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Expires: 1992-03-22
Abstract
Abstract A surgical aspirating or draining device having means maintaining a zone of contamination free gas about the surgical site to reduce a minimum introduction of contaminated particulate and gaseous matter into the surgical site, cavity or wound.
Inventors
- 👤 A Truhan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:08
CPC Classifications
A; A61; A61M; A61M1/00; A61M1/84; A61M1/85; Y; Y10; Y10S; Y10S604/00; Y10S604/902
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
152 words
A surgical aspirating or draining device comprising a first aspirating cannula, means connecting one end of said first cannula to a source of reduced pressure, the other end of said aspirating cannula being open to its environment at a surgical site, a second cannula fixed relative to the first cannula in substantially parallel relationship therewith, means connecting one end of the second cannula to a source of pressurized contamination-free gas at a pressure greater than the pressure of the environment of the open end of the first aspirating cannula, a plurality of outlets for the pressurized gas, at least one of the outlets being adjacent the zone of the surgical site of the open end of the first cannula whereby the zone of aspiration of said first aspirating cannula is bathed in gas issuing from said second cannula to thereby reduce introduction of contaminated particulate and gaseous matter into the surgical site.
Claim 2
Dependent Claim
152 words
A surgical aspirating or draining device comprising a first aspirating cannula, means connecting one end of said first cannula to a source of reduced pressure, the other end of said aspirating cannula being open to its environment at a surgical site, a second cannula fixed relative to the first cannula in substantially parallel relationship therewith, means connecting one end of the second cannula to a source of pressurized contamination-free gas at a pressure greater than the pressure of the environment of the open end of the first aspirating cannula, a plurality of outlets for the pressurized gas, at least one of the outlets being adjacent the zone of the surgical site of the open end of the first cannula whereby the zone of aspiration of said first aspirating cannula is bathed in gas issuing from said second cannula to thereby reduce introduction of contaminated particulate and gaseous matter into the surgical site.
Claim 3
Dependent Claim
159 words
A surgical aspirating or draining device comprising a first aspirating cannula, means connecting one end of said first cannula to a source of reduced pressure, the otheR end of said aspirating cannula being open to its environment at a surgical site, a second cannula maintained in proximity to the first cannula, means connecting one end of the second cannula to a source of pressurized contamination-free gas at a pressure greater than the pressure of the environment of the open end of the first aspirating cannula, a plurality of outlets for the pressurized gas, at least one of the outlets being adjacent the zone of the environment of the surgical site of the open end of the first cannula whereby the zone of aspiration of said first aspirating cannula is bathed in gas issuing from said second cannula to thereby reduce introduction of contaminated particulate and gaseous matter into the surgical site, the first and second cannulae having concentric bores.
Claim 4
Dependent Claim
159 words
A surgical aspirating or draining device comprising a first aspirating cannula, means connecting one end of said first cannula to a source of reduced pressure, the otheR end of said aspirating cannula being open to its environment at a surgical site, a second cannula maintained in proximity to the first cannula, means connecting one end of the second cannula to a source of pressurized contamination-free gas at a pressure greater than the pressure of the environment of the open end of the first aspirating cannula, a plurality of outlets for the pressurized gas, at least one of the outlets being adjacent the zone of the environment of the surgical site of the open end of the first cannula whereby the zone of aspiration of said first aspirating cannula is bathed in gas issuing from said second cannula to thereby reduce introduction of contaminated particulate and gaseous matter into the surgical site, the first and second cannulae having concentric bores.
Claim 5
Dependent Claim
39 words
A surgical aspirating or draining device as defined in claim 1 wherein the area of the outlets in the second cannula progressively decrease in size from adjacent the open end of the first cannula toward said one end thereof.
References Cited (Backward Citations)
US2568566A
Cited
US2804075A
Cited
US3085573A
Cited
US3142298A
Cited
US3426759A
Cited
US3528427A
Cited
US3636940A
Cited
US3610238A
Cited
US3702115A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-05-13 | 1977-11-12 | 1978-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-05-13 | 1981-11-12 | 1982-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-05-13 | 1985-11-12 | 1986-05-14 | $7700.00 | Window Closed / Lapsed |