US5176618A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for preventing closure of passageways
Assignee: Koninklijke Philips NV
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Filing: 1990-08-27
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Granted: 1993-01-05
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Expires: 2010-08-27
Abstract
Abstract An apparatus and method are provided which utilize either the attracting forces of dissimilar pole magnets, or the repelling forces of similar pole magnets, to keep passageways open in living organisms. These passageways might otherwise collapse and close involuntarily due to dysfunction, thus impeding flow of vital gaseous or liquid fluids. Embodiments are described for both permanently implanted and for removable magnets, which may or may not interact with externally attached magnets, thus maximizing the convenience of utilizing this system for the patient. A method of preventing accidental extubation is also described.
Inventors
- 👤 George Freedman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:22
CPC Classifications
A; A61; A61N; A61N2/00; A61N2/004; A61F; A61F2/00; A61F5/00; A61F5/56; A61N2/06; A61F2210/00; A61F2210/009; A61F2240/00; A61F2240/001; A61M; A61M25/00; A61M25/01; A61M25/0105; A61M25/0127
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
154 words
Apparatus for preventing apnea which involves involuntary closure of an airway passageway in the body of humans and animals in the vicinity of the larynx or pharynx in which the airway consists of tubular airway walls of tissue wherein at least one first region of said wall tissue is relatively soft and movable and one second region of said wall tissue opposite said first region is relatively rigid, said apparatus comprising: a) a first magnet adapted to be disposed external to said body and adjacent said first region for generating a first magnetic field within said passageway; b) a second magnet of a size and shape to be implanted within said first region of said passageway in adjacent proximity to said second region for generating a second magnetic field which reacts with said first field to exert a force against said first region which acts in a direction away from closure of said passageway.
Claim 2
Dependent Claim
154 words
Apparatus for preventing apnea which involves involuntary closure of an airway passageway in the body of humans and animals in the vicinity of the larynx or pharynx in which the airway consists of tubular airway walls of tissue wherein at least one first region of said wall tissue is relatively soft and movable and one second region of said wall tissue opposite said first region is relatively rigid, said apparatus comprising: a) a first magnet adapted to be disposed external to said body and adjacent said first region for generating a first magnetic field within said passageway; b) a second magnet of a size and shape to be implanted within said first region of said passageway in adjacent proximity to said second region for generating a second magnetic field which reacts with said first field to exert a force against said first region which acts in a direction away from closure of said passageway.
Claim 3
Dependent Claim
20 words
The apparatus of claim 1 including means for holding the first magnet against the soft tissue of the first region.
Claim 4
Dependent Claim
33 words
Apparatus in accordance with claim 2, wherein a surface of the second magnet faces a surface of the first magnet and is of opposite magnetic polarity to the surface of the first magnet.
Claim 5
Dependent Claim
28 words
The apparatus of claim 1 wherein the first and second magnet is formed of material having an energy product in the range from 18 to 35 million gauss/oersted.
Claim 6
Dependent Claim
15 words
The apparatus of claim 1 wherein the second magnet is coated with a biocompatible polymer.
Claim 7
Dependent Claim
69 words
Apparatus in accordance with claim 1 which includes an externally attached electronic sensing and instrumentation system including electronic circuit means for sensing, which reacts to variations in magnetic fields generated by said first and second magnets, such that monitoring of magnet movement, as a result of passageway movement, can be quantitatively observed and utilized, and a determination made that the magnets are locked into their desired locations and orientation.
Claim 8
Dependent Claim
29 words
Apparatus in accordance with claim 1 which includes a mechanical extender attached to one of said magnets, so as to enlarge its area of mechanical influence on passageway tissue.
Claim 9
Dependent Claim
19 words
Apparatus of claim 7 wherein the extender is made of a tissue-compatible, non-metallic material, not affected by magnetic fields.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1996-01-05 | 1996-07-06 | 1997-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-01-05 | 2000-07-06 | 2001-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-01-05 | 2004-07-06 | 2005-01-05 | $7700.00 | Window Closed / Lapsed |