Patent US3189988A successfully refreshed from Google Patents.
US4407281A
Expired / Lapsed
US
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Intratracheal tube
Assignee: Individual
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Filing: 1981-07-23
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Granted: 1983-10-04
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Expires: 2001-07-23
Abstract
Abstract An intratracheal tube for giving respiration to a patient, specially during narcosis with a mixture of oxygen and narcotic gas, wherein the intratracheal tube has a respirator hose adapted to be pushed in the windpipe of the patient, the forward end of said hose being surrounded by a blocking sleeve inflatable from the outside with a filling gas and in inflated state abutting closely on the windpipe wall, wherein the inner space of said blocking sleeve is connected in gas-conveying manner, via a connecting hose, to a diffusion vessel situated outside the patient, the surface size, wall thickness and material of said diffusion vessel being chosen so as to make it impervious to the filling gas while permitting the outward diffusion of narcotic gas, specially nitrous oxide gas, in an amount corresponding approximately to the amount diffused into said blocking sleeve.
Inventors
- 👤 Ludwig Brandt
- 👤 Hellmut Pokar
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:02
CPC Classifications
A; A61; A61M; A61M16/00; A61M16/04; A61M16/0434; A61M16/044; A61M16/0486
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
158 words
An intratracheal tube for giving respiration to a patient, specially during a narcosis with a mixture of oxygen and narcotic gas, wherein the intratracheal tube comprises a respirator hose adapted to be pushed in the windpipe of the patient, the forward end of said hose being surrounded by a blocking sleeve permeable to narcotic gas and inflatable from the outside with a filling gas and in inflated state abutting closely on the windpipe wall, wherein the inner space of said blocking sleeve is connected in gas-conveying manner, via a connecting hose, to an inflation port and to a diffusion vessel PG,20 situated outside the patient, the surface size, wall thickness and material of said diffusion vessel being chosen so as to make it impervious to the filling gas, but pervious to narcotic gas, thereby permitting the outward diffusion of narcotic gas, specially nitrous oxide gas, in an amount corresponding approximately to the amount diffused into said blocking sleeve.
Claim 2
Dependent Claim
158 words
An intratracheal tube for giving respiration to a patient, specially during a narcosis with a mixture of oxygen and narcotic gas, wherein the intratracheal tube comprises a respirator hose adapted to be pushed in the windpipe of the patient, the forward end of said hose being surrounded by a blocking sleeve permeable to narcotic gas and inflatable from the outside with a filling gas and in inflated state abutting closely on the windpipe wall, wherein the inner space of said blocking sleeve is connected in gas-conveying manner, via a connecting hose, to an inflation port and to a diffusion vessel PG,20 situated outside the patient, the surface size, wall thickness and material of said diffusion vessel being chosen so as to make it impervious to the filling gas, but pervious to narcotic gas, thereby permitting the outward diffusion of narcotic gas, specially nitrous oxide gas, in an amount corresponding approximately to the amount diffused into said blocking sleeve.
Claim 3
Dependent Claim
69 words
An intratracheal tube according to claim 1, wherein the surface size, wall thickness and material of said diffusion vessel and the inner diameter of said connecting hose are chosen so that in the sealed system comprised of blocking sleeve, connecting hose and diffusion vessel there is attained a diffusion equilibrium whereby the inner pressure of said system is kept at an almost constant final value after a start-up time.
Claim 4
Dependent Claim
49 words
An intratracheal tube according to claim 1, wherein said connecting hose between said blocking sleeve and said diffusion vessel is attached with said respirator hose at least in the area where said respiration hose of the intratracheal tube extends into and within the windpipe of the patient in use.
Claim 5
Dependent Claim
20 words
An intratracheal tube according to claim 3, wherein said connecting hose is incorporated into the wall of said respiration hose.
Claim 6
Dependent Claim
18 words
An intratracheal tube according to claim 3, wherein said connecting hose at least partly encompasses said respirator hose.
References Cited (Backward Citations)
US3848605A
Cited
US4324235A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-10-03 | 1987-04-04 | 1987-10-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-10-03 | 1991-04-04 | 1991-10-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-10-03 | 1995-04-04 | 1995-10-04 | $7700.00 | Window Closed / Lapsed |