Patent US3880168A successfully refreshed from Google Patents.
US3880168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endotracheal tube
Assignee: Individual
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Filing: 1973-12-21
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Granted: 1975-04-29
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Expires: 1993-12-21
Abstract
Abstract An endotracheal tube adapted to be easily inserted into one bronchus without obstructing fluid flow from the other bronchus, comprising a tapered distal section for ease of insertion and a multiplicity of openings in the wall of the tapered section to permit full fluid flow therethrough without the reduced flow other wise imposed by the constriction in the tube due to the tapered end. A tapered tamponading elastomeric balloon is formed about the outside circumference of the tube to splint the vocal chords against movement.
Inventors
- 👤 Robert A Berman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:11
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/04; A61M16/0402; A61M16/0404; A61M16/0434; A61M16/0445
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
220 words
An endotracheal tube having a distal end and a near end, comprising: a. a tapered portion, said tapered portion extending from a larger outside diameter between the distal and near ends to a smaller outer diameter at the distal end, b. a plurality of holes formed in the wall of the endotracheal tube within said tapered portion, c. said plurality of holes containing a total cross-sectional area which is greater than the difference between the crosssectional area of the bore of the tube at its largest inner diameter and the cross-sectional area of the bore of the tube at its smallest inner diameter, d. a tapered elastomeric balloon extending circumferentially about the exterior of the endotracheal tube, e. said tapered balloon tapering from a larger outer diameter to a smaller outer diameter in a direction toward said distal end of the tube, f. the taper of said tapered balloon being a continuation of the taper of said tapered portion of the tube, g. the thickness of the wall of said tube decreases on said tapered portion toward said distal end, thereby making said tubing progressively more flexible in a direction toward said distal end, h. said tapered resilient balloon engaging against and splinting a patient''s vocal cords to prevent movement of said vocal cords relative to said tapered resilient balloon.
Claim 2
Dependent Claim
220 words
An endotracheal tube having a distal end and a near end, comprising: a. a tapered portion, said tapered portion extending from a larger outside diameter between the distal and near ends to a smaller outer diameter at the distal end, b. a plurality of holes formed in the wall of the endotracheal tube within said tapered portion, c. said plurality of holes containing a total cross-sectional area which is greater than the difference between the crosssectional area of the bore of the tube at its largest inner diameter and the cross-sectional area of the bore of the tube at its smallest inner diameter, d. a tapered elastomeric balloon extending circumferentially about the exterior of the endotracheal tube, e. said tapered balloon tapering from a larger outer diameter to a smaller outer diameter in a direction toward said distal end of the tube, f. the taper of said tapered balloon being a continuation of the taper of said tapered portion of the tube, g. the thickness of the wall of said tube decreases on said tapered portion toward said distal end, thereby making said tubing progressively more flexible in a direction toward said distal end, h. said tapered resilient balloon engaging against and splinting a patient''s vocal cords to prevent movement of said vocal cords relative to said tapered resilient balloon.
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) | 1978-04-28 | 1978-10-28 | 1979-04-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-04-28 | 1982-10-28 | 1983-04-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-04-28 | 1986-10-28 | 1987-04-29 | $7700.00 | Window Closed / Lapsed |