Drainage tube for sinus maxillaris, a means for its insertion and a means for making a hole for its positioning

• US 5,139,502 A
• Filed: 02/16/1990
• Issued: 08/18/1992
• Est. Priority Date: 08/19/1987
• Status: Expired due to Fees

• Current Assignee: DNB Nor Bank ASA Norge Filial Sverige
• Original Assignee: Atos Medical AB (Coloplast A/S)
• Inventors: Berg, Olle, Lejdeborn, Lars
• Primary Examiner(s): Rosenbaum, C. Fred
• Assistant Examiner(s): Maglione, C.
• Application Number:
  US07/465,122
• Time in Patent Office: 914 Days
• Field of Search: 604/8, 604/11, 604/15, 604/264, 604/285, 606/79, 606/80, 606/108-109, 606/167, 606/170, 606/180, 606/184
• US Class Current: 606/108
• CPC Class Codes: A61M 27/002 Implant devices for drainage of body fluids from one part of the body to another intraocular A61F9/00781; middle ear A61F11/202

Abstract

A drainage tube (1) for drainage of sinus maxillaris consists of a middle portion (1b) having an exterior dimension adapted to a hole made in the bone wall between nasal cavity and sinus maxillaris, an extendible end portion preferably outwardly foldable legs (6) and an opposite end portion (2) widened compared with the middle portion (1b), preferably a collar. For making the hole in the bone wall is developed a tube-formed drill, which in its free end edge is formed with a toothed cutter, and for the insertion of the drainage tube in position between nasal cavity and sinus maxillaris is developed a particular insertion instrument.

Claims

1. An apparatus for treatment of infections in a sinus maxillaris including:

a drainage tube adapted to be positioned in a hole made in a wall between a nasal cavity and the sinus maxillaris and arranged for permanent positioning in the wall during an entire treatment time before its removal by extraction, the drainage tube comprising;

a middle portion having an exterior dimension closely adapted to the dimension of the hole and having an interior dimension sufficiently large for guaranteeing continuous flow of suppuration and secretions as well as gas exchange through the drainage tube,

an extendible end portion extending from the middle portion and automatically extendable to a larger dimension than the middle portion to be arranged in the sinus maxillaris, and

a collar-like end portion extending from the middle portion opposite the extendible end portion and having a dimension larger than the middle portion to be arranged in the nasal cavity, wherein the length of said middle portion is sized for substantially fixed arrangement of the drainage tube at the wall due to the close adaptment of the middle portion thickness to the wall thickness, the extendible end portion and collar-like end portion abutting against surfaces around said hole, the extendible end portion abutting the side of the wall of the sinus maxillaris and the collar-like end portion abutting the side of the wall in the nasal cavity; and

means for inserting the drainage tube in the wall between the nasal cavity and the sinus maxillaris, the means for inserting being tube-formed and having a free end portion and an exterior dimension substantially corresponding to the dimension of the hole in the wall and an interior dimension substantially corresponding to the exterior dimension of the middle portion of the drainage tube, the free end portion being formed to hold the extendible end portion of the drainage tube in a nonextended position corresponding in dimension to the outer dimension of the middle portion and with a part of said extendible end portion projecting out of the free end portion, the means for inserting being provided with support means for abutment against the surface of the collar-like end portion of the drainage tube faced away from the extendible end portion.

2. An apparatus for treatment of infections in a sinus maxillaris including:

a drainage tube adapted to be positioned in a hole made in a wall between a nasal cavity and the sinus maxillaris and arranged for permanent positioning in the wall during an entire treatment time before its removal by extraction, the drainage tube comprising;

a middle portion having an exterior dimension closely adapted to the dimension of the hole and having an interior dimension sufficiently large for guaranteeing continuous flow of suppuration and secretions as well as gas exchange through the drainage tube,

an extendible end portion extending from the middle portion and automatically extendable to a larger dimension than the middle portion to be arranged in the sinus maxillaris, and

a collar-like portion extending from the middle portion opposite the extendible end portion and having a dimension larger than the middle portion to be arranged in the nasal cavity, wherein the length of said middle portion is sized for substantially fixed arrangement of the drainage tube at the wall due to the close adaptment of the middle portion thickness to the wall thickness, the extendible end portion and collar-like end portion abutting against surfaces around said hole, the extendible end portion abutting the side of the wall of the sinus maxillaris and the collar-like end portion abutting the side of the wall in the nasal cavity; and

means for making a hole in the wall between a nasal cavity and the sinus maxillaris for positioning of the drainage tube, the means for making comprising a tube-formed drill having a free end edge at one end of said drill, the free end edge being formed as a circular cutter.