Expandable nasal stent

• US 5,336,163 A
• Filed: 01/06/1993
• Issued: 08/09/1994
• Est. Priority Date: 01/06/1993
• Status: Expired due to Fees

• Current Assignee: Gyrus ACMI, Inc. (Olympus Corporation)
• Original Assignee: Smith & Nephew Richards Incorporated (Smith & Nephew PLC)
• Inventors: Schwarz, Robert, DeMane, Catherine
• Primary Examiner(s): Rosenbaum, C. Fred
• Assistant Examiner(s): GRING, NOELLE K
• Application Number:
  US08/001,064
• Time in Patent Office: 580 Days
• Field of Search: 128/858, 128/206.11, 602/42, 602/46, 602/74, 604/11, 604/381, 604/307, 604/304, 606/23.2, 606/191, 606/192, 606/196, 606/199
• US Class Current: 602/46
• CPC Class Codes: A61F 13/2005 specially adapted for the nose cavity
• CPC Class Codes: A61F 13/36 Surgical swabs, e.g. for absorbency or packing body cavities during surgery A61F13/38 takes precedence

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.

Claims

1. 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.

2. 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.

3. The nasal stent of claim 1, wherein the minimally porous outer surface has a thickness of 0.001-2 mm.

4. The nasal stent of claim 1, wherein the body and outer surface are chemically the same.

5. The nasal stent of claim 1, wherein the outer surface includes a non-porous portion for sufficient rigidity to form a splint.

6. The nasal stent of claim 5, wherein the non-porous portion is about 2 mm. thick and is chemically the same as the body.

7. 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.

8. The nasal stent of claim 7 wherein the trough includes a minimally porous outer surface.

9. The nasal stent of claim 1, and further including an opening extending through the expandable nasal stent from end to end.

10. The nasal stent of claim 9, wherein the surface of the body defining the opening is minimally porous.