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US5246455A Expired / Lapsed US ⏱️ 0.0 years remaining

Middle meatal antrostomy ventilation tube

Assignee: Micromedics Inc
•
Filing: 1991-05-17
•
Granted: 1993-09-21
•
Expires: 2011-05-17
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Abstract

Abstract An implantable ventilation tube for insertion in bodily tissues is disclosed. A suggested use for such a tube is as a middle meatal antrostomy ventilation tube for use following endoscopic surgery. It consists of a pair of flanges and a central tubular vent section extending therebetween, having the flanges positioned perpendicular to the lumen of the central tubular vent section. The tube is preferably made of elastomeric material and may include grooves etched in the distal surface of the distal flange to assist in insertion by permitting materials of a higher durometer rating than silastic® to be folded then grasped during insertion. It is suggested that the proximal flange be generally rectangular shaped, while the distal flange be generally triangular shaped, to ease insertion yet enhance anchoring capabilities. Once properly positioned through an opening prepared in a body cavity or duct, the ventilation tube permits the unhindered flow of fluids, such as air, through the lumen.

Inventors

  • 👤 Alain H. Shikani

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-24 07:50
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/18; A61F11/00; A61F11/20; A61F11/202; A61F2/186; A61F2/82

Claims Analysis

Total Claims: 4
Claim 1
Independent Claim 198 words
An implantable stent for insertion into a lateral wall of a nasal cavity of a patient following functional endoscopic middle meatal antrostomy procedure for venting a maxillary sinus of said patient while establishing a barrier to the formation of adhesions and synechiae between said later wall and a middle turbinate of said patient, comprising: (a) a flexible, plastic, tubular vent member having first and second open ends and a lumen of a predetermined diameter extending therebetween, said vent member including (i) a first, generally rectangular, flexible flange member integrally formed on said first open end of said tubular vent member, said first flexible flange member having a width dimension approximately equal to said diameter of said lumen of said tubular vent member and said first flexible flange member having a length dimension from about five to six times said width dimension, (ii) a second, generally triangular, flexible flange member integrally formed on said second open end of said tubular vent member, said triangular flange member having height and base dimensions providing said triangular flange member with an area sufficient to effectively maintain separation between said lateral wall of said nasal cavity of said patient and said middle turbinate.
Claim 2
Dependent Claim 198 words
An implantable stent for insertion into a lateral wall of a nasal cavity of a patient following functional endoscopic middle meatal antrostomy procedure for venting a maxillary sinus of said patient while establishing a barrier to the formation of adhesions and synechiae between said later wall and a middle turbinate of said patient, comprising: (a) a flexible, plastic, tubular vent member having first and second open ends and a lumen of a predetermined diameter extending therebetween, said vent member including (i) a first, generally rectangular, flexible flange member integrally formed on said first open end of said tubular vent member, said first flexible flange member having a width dimension approximately equal to said diameter of said lumen of said tubular vent member and said first flexible flange member having a length dimension from about five to six times said width dimension, (ii) a second, generally triangular, flexible flange member integrally formed on said second open end of said tubular vent member, said triangular flange member having height and base dimensions providing said triangular flange member with an area sufficient to effectively maintain separation between said lateral wall of said nasal cavity of said patient and said middle turbinate.
Claim 3
Dependent Claim 16 words
The implantable stent as in claim 1 wherein said stent comprises a one-piece, molded, silastic device.
Claim 4
Dependent Claim 18 words
The implantable stent as in claim 1 wherein said base dimension is about equal to said height dimension.

References Cited (Backward Citations)

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WO1987006817A1 Cited
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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) 1996-09-20 1997-03-22 1997-09-21 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 2000-09-20 2001-03-22 2001-09-21 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 2004-09-20 2005-03-22 2005-09-21 $7700.00 Window Closed / Lapsed

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