Patent US4305392A successfully refreshed from Google Patents.
US4305392A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endotracheal tube with suction device
Assignee: Individual
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Filing: 1978-09-29
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Granted: 1981-12-15
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Expires: 1998-09-29
Abstract
Abstract An endotracheal tube of the inflatable cuff type and having a suction chamber adjacent the upper side of the cuff. The suction chamber is in the shape of a bulge having four ports equally spaced about the periphery of the bulge and facing upwardly. Suction applied to the chamber will extract fluids from the trachea above the cuff without invaginating the tracheal mucosa. Medicinal fluids may also be introduced into the trachea via the suction chamber and ports.
Inventors
- 👤 Martin H. Chester
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:46
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/04; A61M1/00; A61M1/84; A61M1/85; A61M16/0463; A61M16/0475; A61M16/0477; A61M16/0479; A61M16/0486; A61M16/0402; A61M16/0431; A61M16/0434
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
203 words
An endotracheal tube for insertion into the trachea and having a proximal and a distal end, said tube comprising: (a) a main lumen having a cylindrical wall; (b) an inflatable cuff on said main lumen between said proximal and distal ends; (c) a cuff-inflating lumen extending along said cylindrical wall between said cuff and the proximal end of said main lumen; (d) a suction chamber disposed on said main lumen adjacent the proximal side of said cuff, said chamber having a larger diameter than said main lumen and being in the shape of a bulge having a surface inclined at an acute angle to the vertical axis of said main lumen, said chamber containing a plurality of ports located on said inclined surface and spaced inwardly of the outer dimension of said chamber so that said ports do not contact the trachea when the endotracheal tube is inserted therein; (e) a chamber lumen extending along said wall between said chamber and the proximal end of said main lumen for suctioning out fluids in the trachea above said cuff and for introducing medicinal fluids into the trachea without causing trauma to the tracheal mucosa; and (f) means for applying suction to said chamber lumen.
Claim 2
Dependent Claim
203 words
An endotracheal tube for insertion into the trachea and having a proximal and a distal end, said tube comprising: (a) a main lumen having a cylindrical wall; (b) an inflatable cuff on said main lumen between said proximal and distal ends; (c) a cuff-inflating lumen extending along said cylindrical wall between said cuff and the proximal end of said main lumen; (d) a suction chamber disposed on said main lumen adjacent the proximal side of said cuff, said chamber having a larger diameter than said main lumen and being in the shape of a bulge having a surface inclined at an acute angle to the vertical axis of said main lumen, said chamber containing a plurality of ports located on said inclined surface and spaced inwardly of the outer dimension of said chamber so that said ports do not contact the trachea when the endotracheal tube is inserted therein; (e) a chamber lumen extending along said wall between said chamber and the proximal end of said main lumen for suctioning out fluids in the trachea above said cuff and for introducing medicinal fluids into the trachea without causing trauma to the tracheal mucosa; and (f) means for applying suction to said chamber lumen.
Claim 3
Dependent Claim
26 words
An endotracheal tube as defined in claim 1 wherein the outer diameter of said suction chamber is approximately one-third greater than that of said main lumen.
Claim 4
Dependent Claim
15 words
An endotracheal tube as defined in claim 1 wherein said ports are ovoid in shape.
Claim 5
Dependent Claim
16 words
An endotracheal tube as defined in claim 3 wherein said chamber lumen is ovoid in cross-section.
Claim 6
Dependent Claim
24 words
An endotracheal tube as defined in claim 1 wherein said suction chamber contains four ports equally spaced around the inclined surface of said chamber.
Claim 7
Dependent Claim
24 words
An endotracheal tube as defined in claim 1 wherein said cuff-inflating and suction chamber lumens are located within the wall of said main lumen.
Claim 8
Dependent Claim
21 words
An endotracheal tube as defined in claim 1, further comprising means for applying a fluid jet stream to said suction lumen.
Claim 9
Dependent Claim
37 words
An endotracheal tube as defined in claim 1, wherein the diameter of said suction chamber is less than that of the inflated cuff, and wherein said ports are located immediately adjacent the wall of said main lumen.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-12-14 | 1985-06-15 | 1985-12-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-12-14 | 1989-06-15 | 1989-12-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-12-14 | 1993-06-15 | 1993-12-15 | $7700.00 | Window Closed / Lapsed |