US5336163A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Expandable nasal stent
Assignee: Gyrus ACMI Inc
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Filing: 1993-01-06
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Granted: 1994-08-09
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Expires: 2013-01-06
Abstract
Abstract An expandable nasal stent for postoperative nasal packing is formed of a body with outer surfaces that correspond generally to the surfaces that define a human nasal cavity. The body is formed of a highly porous, pliable and absorbent foam material having a nonadherent, minimally porous outer surface.
Inventors
- 👤 Catherine DeMane
- 👤 Robert Schwarz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:01
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/36; A61F13/20; A61F13/2002; A61F13/2005
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
94 words
An expandable nasal stent for postoperative nasal packing, comprising: (a) a body having outer surfaces corresponding generally to the mucosal surfaces that define a human nasal cavity; (b) the body being formed of a unitary layer of inherently porous foam material capable of expanding outwardly, and having a nonadherent surface for absorbing fluids from the nasal cavity without adhering to the mucosal surfaces of the nasal cavity; and (c) the body being capable of providing a nasal stent for postoperative nasal packing so as to prevent adhesions and scar formation between the mucosal surfaces.
Claim 2
Dependent Claim
94 words
An expandable nasal stent for postoperative nasal packing, comprising: (a) a body having outer surfaces corresponding generally to the mucosal surfaces that define a human nasal cavity; (b) the body being formed of a unitary layer of inherently porous foam material capable of expanding outwardly, and having a nonadherent surface for absorbing fluids from the nasal cavity without adhering to the mucosal surfaces of the nasal cavity; and (c) the body being capable of providing a nasal stent for postoperative nasal packing so as to prevent adhesions and scar formation between the mucosal surfaces.
Claim 3
Dependent Claim
35 words
The nasal stent of claim 1, wherein the highly porous foam material is selected from a group consisting of medical grade polyurethane hydrophilic foams having a base material of polyether polyisocynate or other primary amines.
Claim 4
Dependent Claim
18 words
The nasal stent of claim 1, wherein the minimally porous outer surface has a thickness of 0.001-2 mm.
Claim 5
Dependent Claim
16 words
The nasal stent of claim 1, wherein the body and outer surface are chemically the same.
Claim 6
Dependent Claim
21 words
The nasal stent of claim 1, wherein the outer surface includes a non-porous portion for sufficient rigidity to form a splint.
Claim 7
Dependent Claim
23 words
The nasal stent of claim 5, wherein the non-porous portion is about 2 mm. thick and is chemically the same as the body.
Claim 8
Dependent Claim
36 words
The nasal stent of claim 1, wherein a trough is formed on the outer surface of the body allowing for the accommodation of a middle nasal turbinate on the lateral wall of a human nasal cavity.
Claim 9
Dependent Claim
15 words
The nasal stent of claim 7 wherein the trough includes a minimally porous outer surface.
Claim 10
Dependent Claim
21 words
The nasal stent of claim 1, and further including an opening extending through the expandable nasal stent from end to end.
Claim 11
Dependent Claim
18 words
The nasal stent of claim 9, wherein the surface of the body defining the opening is minimally porous.
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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) | 1997-08-08 | 1998-02-07 | 1998-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-08-08 | 2002-02-07 | 2002-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-08-08 | 2006-02-07 | 2006-08-09 | $7700.00 | Window Closed / Lapsed |