Search Images Maps Play YouTube News Gmail Drive More »
Sign in
Screen reader users: click this link for accessible mode. Accessible mode has the same essential features but works better with your reader.

Patents

  1. Advanced Patent Search
Publication numberUS3721233 A
Publication typeGrant
Publication dateMar 20, 1973
Filing dateOct 30, 1970
Priority dateOct 30, 1970
Publication numberUS 3721233 A, US 3721233A, US-A-3721233, US3721233 A, US3721233A
InventorsHood E, Montgomery W
Original AssigneeHood E, Montgomery W
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
T-shaped tracheal stent
US 3721233 A
Abstract
A T-shaped stent for use following surgical reconstruction of the cervical trachea and surgical correction of tracheal and subglottic stenosis. The stent comprises a tubular intraluminal portion and a tubular tracheotomy portion connected thereto between its ends and provided with a removable plug. The tubular portions are of a resiliently yieldable stock enabling the ends of the intraluminal portion to be folded together or against the tracheotomy portion for insertion and removal through a tracheotomy orifice. The intraluminal portion provides internal support for the repaired part of the trachea and the cross sectional area of the tracheotomy portion increases at its junction with the intraluminal portion to an axial extent such that external tapering surfaces are provided for entry into the posterior end of the orifice to provide molding support for and overcorrecting the inferior margin of adjacent portions of the anterior tracheal wall.
Images(3)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

United States Patent 91 Montgomery et a1.

[ 5]March 20, 1973 [54] T-SHAPED TRACHEAL STENT [22] Filed: Oct. 30, 1970 [21] Appl. No.: 85,530

Primary Examiner-Channing L. Pace Attorney-Abbott Spear [57] ABSTRACT A T-shaped stent for use following surgical reconstruction of the cervical trachea and surgical correction of tracheal and subglottic stenosis. The stem comprises a tubular intraluminal portion and a tubular tracheotomy portion connected thereto between its ends and provided with a removable plug. The tubular portions are of a resiliently yieldable stock enabling the ends of the intraluminal portion to be folded together or against the tracheotomy portion for insertion and removal through a tracheotomy orifice. The intraluminal portion provides internal support for the repaired part of the trachea and the cross sectional area of the tracheotomy portion increases at its junction with the intraluminal portion to an axial extent such that external tapering surfaces are provided for entry into the posterior end of the orifice to provide molding support for and overcorrecting the inferior margin of adjacent portions of the anterior tracheal wall.

2 Claims, 7 Drawing Figures PATENTEDHARZO I975 SHEET 10F 5 INVENTORS WILL/AM W MONTGOMERY EUGENE B. HOOD BY o ATTORN PATENTEUMARZOIUYB ,7 1,233

FIG. 3

(2) --P ULL INVENTORS WILL/AM W MONTGOMERY 5 /6 EUGENE 8. H000 BY aw-M AT ToRNi PATENTEUmzo I975 SHEET 3 OF 3 I mm l'n'lu'll I K o FIG. 7

INVENTORS WILL/AM W MONTGOMERY EUGENE B. HOOD ATTORN Y T-SIIAPED TRACHEAL STENT The present invention relates to T-shaped tracheal stents and a scar tissue controlling method for use following surgical reconstruction of the cervical portion of the trachea and surgical correction of tracheal and subglottic stenosis.

The present invention relates to T-shaped tracheal stents and a scar tissue controlling method for use following surgical reconstruction of the cervical portion of the trachea and surgical correction of tracheal and subglottic stenosis.

We developed a T-shaped stent for insertion into the trachea in the zone where is was reconstructed or corrected, the stent consisting of an intraluminal tube and a tracheotomy tube joined thereto between its ends. Both tubes were of a soft flexible material, silicone rubber in practice, that had sufficient resiliency to enable the stent to be readily deformed by folding one of its intraluminal portions against the tracheotomy portion or with both intraluminal portions folded together for entry or removal through the tracheotomy and also to conform, when inserted, to normal contours of the trachea and yet provide good support therefor.

These stents have been used with success in a substantial number of operations. While their use clearly promotes healing, it has been noted that after the tracheal orifice has healed, scar tissue will often be found that projects into the tracheal passage to a troublesome extent.

The principal objective of the invention is to provide a T-shaped stent possessed of the virtues of the one whose construction was just summarized and that will prevent the resulting scar tissue from being a troublesome problem. In accordance with the invention, this objective is attained by providing that the tracheotomy tube has, at its junction with the intraluminal tube, a cross sectional area that so increases towards the intraluminal tube as to provide external surfaces that taper through a predetermined axial zone thus to provide molding surfaces for entry into the posterior end of the tracheotomy to overcorrect the inferior margins of adjacent portions of the anterior tracheal wall and thereby prevent objectionable scar tissue from ultimately projecting into the tracheal passage.

A particular objective of the invention is to have such molding surfaces disposed towards the opposite ends of the intraluminal portion.

Yet another objective of the invention is to provide that the junction between the two tubular portions provides internal surfaces that are flared towards the ends of the intraluminal portions thus to facilitate the introduction of a catheter into an intraluminal portion through the tracheotomy portions if its use becomes necessary.

Another objective of the invention is to provide a method by which scar tissue at the posterior end of a tracheal orifice can be prevented from being an interference within the trachea, an objective attained by overconnecting the inferior layer of portions of the anterior tracheal wall adjacent the orifice with a molding tracheotomy support.

In the accompanying drawings, there is shown an embodiment of the invention illustrative of these and other of its objectives, novel features, and advantages. In the drawings:

FIG. 1 is a section taken vertically through the trachea illustrating the introduction of one end of the intraluminal portion of the stent into the surgically established tracheal orifice;

FIG. 2 is a like view illustrating the entered end of the stent being inserted downwardly into the trachea;

FIG. 3 is a view similar to FIG. 2 illustrating the introduction of the other end of the intraluminal portion into the trachea to extend upwardly therein;

FIG. 4 is a like view illustrating the final step in positioning the installed stent;

FIG. 5 is another like view showing the installed stent with a plug inserted in the exposed end of its tracheotomy portion;

FIG. 6 is a side elevation of a stent in accordance with the invention; and

FIG. 7 is a view of the stent as seen from the free end of the tracheotomy portion.

A T-shaped tracheal stent in accordance with the invention is generally indicated at 10 and, as may best be seen in FIGS. 6 and 7, it comprises an intraluminal portion 11 and a tubular tracheotomy portion 12 of a somewhat smaller diameter and joined to the portion 11 between the ends thereof with the lower portion slightly longer than the upper portion. The portion 11 has both of its ends inwardly curved as at 13 while the outer or free end of the tracheotomy portion 12 is inwardly curved as at 14 and is closed by a stopper or plug 15. The portions 11 and 12 are of a soft, resiliently yieldable material such as silicone rubber that is relatively inert. In practice, the wall thickness of the tubular portions 11 and 12 is in the neighborhood of 1.5 mil and their outside diameters vary as the stents are made available to meet requirements ranging from male adults to infants as the intraluminal portions must fit the trachea l6 snugly to provide support therefor. By way of example, the outside diameter of the intraluminal portion for pediatric uses is 8 mm, that for adolescents 10 mm, while the adult sizes are 12 mm, 14 mm, and 16 mm. Either end of the portion 11 may be trimmed if necessary. The stent 10, as thus far described is substantially that previously referred to as having been successfully used for some time.

In accordance with the invention, the cross sectional area of the tracheotomy tube 12 is increased to have a cross sectional area greater than that of the tracheotomy orifice through an appreciable axial zone where it joins the intraluminal tube 11 to provide tapering surfaces for entry into the posterior end of the tracheotomy orifice 17 and provide molding support therefor. As shown in the drawings, the increased cross sectional area is such that the molding surfaces are in the form of shoulders 18, each disposed toward an end of the intraluminal portion 11, the molding shoulders being for use in overcorrecting the inferior margin of the anterior tracheal wall adjacent the tracheotomy orifice 17. In practice, the shoulders are arcuate with the radius varying with the diameter of the intraluminal portion in the neighborhood of five thirty-seconds of an inch with the 12 mm intraluminal tube. This construction provides another advantageous feature since it results in the junction between the tubes being in the form of a mouth 19, see FIG. 6, flared towards the ends of the intraluminal portion 11 to enable catheter insertion to be more easily effected than is the case with a substantially right angular junction.

Such a stent is installed through the tracheotomy orifice 17 following surgical reconstruction of the cervical portion of the trachea 16 or correction of tracheal and subglottic stenosis. Reference is made to FIGS. 1 4 to show the manner in which the stent is installed.

A stent 10 is selected for use having the diameter of its intraluminal portion 1 1 such as to provide a supporting fit for the patients trachea when inserted therein. As shown in FIG. 1, the end of the stent portion 11 that is to extend upwardly in the trachea is gripped by forceps by which the other end may be entered into and pushed through the tracheotomy orifice 17 and downwardly into the trachea 16. As will be apparent from FIG. 2, the inwardly curved end 13 facilitates such entry.

In FIG. 3, it will be noted that as the forceps-held end of the portion 11 is forced through the tracheotomy orifice, the stent collapses at the junction of the portions 11 and 12. The stent portion 11 is then released and the outer end of the tubular portion 12 is then gripped by the forceps with an outward pull moving the intraluminal portion into a position supporting the cervical portion of the trachea and the shoulders 18 into molding contact with the posterior end of the tracheotomy to overcorrect the inferior margin 16A of the reconstructed or reconstituted anterior tracheal wall, see FIG. 5, thus to prevent any resulting scar tissue from projecting into the trachea when the tracheotomy has healed. By way of example, anterior tracheal stenosis is a collapse or buckling in of the anterior tracheal wall requiring surgery to enable the tracheal rings to be repositioned or the anterior wall supported by the sternohyoid muscles. In either case, scar tissue is present that must be removed and a stent in accordance with the invention prevents recurrence of scar tissue formation and thus prevents recurrent stenosis.

We claim:

1. A T-shaped stent for insertion through a tracheotomy orifice into a trachea following surgical reconstruction of the cervical portion thereof, and surgical correction of tracheal and subglottic stenosis, said stent comprising an intraluminal tubular portion open at both ends and whose outside diameter is such as to provide a snugly fitting internal support for the reconstructed or corrected part of the trachea, and an integral tracheotomy tubular portion of a diameter less than that of the intraluminal portion and disposed at an angle thereto intermediate the ends thereof and in communication with the interior of said intraluminal portion, and said tracheotomy portion being of a length to project outwardly through a tracheotomy orifice after the disposition of the intraluminal portion within a trachea through said orifice, the junction of the two portions being ovate with its long axis lengthwise of the intraluminal portion and providing external flared shoulders lengthwise of both portions and of substantial axial such as to provide, when the stent is in place, molding surfaces for entry into the interior end of the tracheotomy orifice in molding support of the margin of adjacent margins of the tracheal wall and operable to overcorrect said margins thereby to avoid the protrusion of any resulting scar tissue into the trachea, said stent being of resiliently yieldable stock enabling one end of the intraluminal portion to be folded against the

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US3042021 *Nov 25, 1958Jul 3, 1962Thane ReadBypass type insert plug for body passageway
US3392722 *Jul 29, 1965Jul 16, 1968Roger L. JorgensenPost-operative surgical valve
US3515124 *Jul 24, 1967Jun 2, 1970Gurchot CharlesMethod of obtaining exocrine secretions from live animals
US3538918 *Oct 9, 1968Nov 10, 1970Horizon Ind LtdTracheo-bronchostomy tube
SU181775A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4003381 *Apr 30, 1975Jan 18, 1977Gilbert Max ICricothyrostomy instrument
US4795465 *May 14, 1987Jan 3, 1989Hood LaboratoriesTracheobronchial stent
US5054483 *May 22, 1990Oct 8, 1991Hood LaboratoriesTracheal cannulas and stents
US5054484 *Nov 21, 1990Oct 8, 1991Hebeler Jr Robert FTracheostomy device
US5107828 *Jun 15, 1990Apr 28, 1992Walter KossTracheostoma closure device
US5184610 *May 30, 1991Feb 9, 1993Hood LaboratoriesTracheal cannulas and stents
US6162237 *Apr 19, 1999Dec 19, 2000Chan; Winston Kam YewTemporary intravascular stent for use in retrohepatic IVC or hepatic vein injury
US7487778 *Feb 4, 2004Feb 10, 2009Breathe Technologies, Inc.Tracheal catheter and prosthesis and method of respiratory support of a patient
US7533670Sep 20, 2006May 19, 2009Breathe Technologies, Inc.Systems, methods and apparatus for respiratory support of a patient
US7588033Jun 17, 2004Sep 15, 2009Breathe Technologies, Inc.Methods, systems and devices for improving ventilation in a lung area
US7631642 *May 18, 2007Dec 15, 2009Breathe Technologies, Inc.Tracheostoma spacer, tracheotomy method, and device for inserting a tracheostoma spacer
US7845353May 21, 2007Dec 7, 2010Aeiomed, Inc.Face mask support
US8020557Apr 10, 2007Sep 20, 2011Somnetics Global Pte. Ltd.Apparatus and methods for administration of positive airway pressure therapies
US8074645Apr 10, 2007Dec 13, 2011Somnetics Global Pte. Ltd.Apparatus and methods for providing humidity in respiratory therapy
US8091553Jun 19, 2006Jan 10, 2012Somnetics Global Pte. Ltd.Face mask support
US8136527Mar 13, 2008Mar 20, 2012Breathe Technologies, Inc.Method and device for non-invasive ventilation with nasal interface
US8381729Aug 3, 2007Feb 26, 2013Breathe Technologies, Inc.Methods and devices for minimally invasive respiratory support
US8418694Apr 30, 2010Apr 16, 2013Breathe Technologies, Inc.Systems, methods and apparatus for respiratory support of a patient
US8474450 *Nov 12, 2009Jul 2, 2013Jose Pablo Diaz JimenezEnhancements introduced into prolonged tracheal cannulation processes
US8517017Jan 8, 2010Aug 27, 2013Hancock Medical, Inc.Self-contained, intermittent positive airway pressure systems and methods for treating sleep apnea, snoring, and other respiratory disorders
US8567399Sep 26, 2008Oct 29, 2013Breathe Technologies, Inc.Methods and devices for providing inspiratory and expiratory flow relief during ventilation therapy
US8573219Dec 9, 2011Nov 5, 2013Breathe Technologies, Inc.Method and device for non-invasive ventilation with nasal interface
US8602025Nov 21, 2011Dec 10, 2013Somnetics Global Pte. Ltd.Apparatus and methods for providing humidity in respiratory therapy
US8631791Aug 16, 2011Jan 21, 2014Somnetics Global Pte. Ltd.Apparatus and methods for administration of positive airway pressure therapies
US8677999Aug 21, 2009Mar 25, 2014Breathe Technologies, Inc.Methods and devices for providing mechanical ventilation with an open airway interface
US8770193Apr 17, 2009Jul 8, 2014Breathe Technologies, Inc.Methods and devices for sensing respiration and controlling ventilator functions
US8776793Apr 17, 2009Jul 15, 2014Breathe Technologies, Inc.Methods and devices for sensing respiration and controlling ventilator functions
US20110108037 *Nov 12, 2009May 12, 2011Jose Pablo Diaz JimenezEnhancements introduced into prolonged tracheal cannulation processes
WO1986006970A2 *May 10, 1986Dec 4, 1986Walter KossTracheotomy closure
Classifications
U.S. Classification128/207.14
International ClassificationA61M16/04
Cooperative ClassificationA61M16/0465
European ClassificationA61M16/04E
Legal Events
DateCodeEventDescription
Jun 24, 1996ASAssignment
Owner name: SAFETY FUND NATIONAL BANK, MASSACHUSETTS
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:BOSTON MEDICAL PRODUCTS;REEL/FRAME:008000/0710
Effective date: 19960607
Jun 24, 1996AS02Assignment of assignor's interest
Owner name: BOSTON MEDICAL PRODUCTS
Owner name: SAFETY FUND NATIONAL BANK 200 COMMERCIAL STREET WO
Effective date: 19960607
Jan 25, 1988AS02Assignment of assignor's interest
Owner name: E. BENSON HOOD LABORATORIES, INC., A MA. CORP.
Owner name: SOUTH SHORE BANK, 1400 HANCOCK STREET, QUINCY, MA
Effective date: 19880120
Jan 25, 1988ASAssignment
Owner name: SOUTH SHORE BANK, 1400 HANCOCK STREET, QUINCY, MA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:E. BENSON HOOD LABORATORIES, INC., A MA. CORP.;REEL/FRAME:004837/0758
Effective date: 19880120
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:E. BENSON HOOD LABORATORIES, INC., A MA. CORP.;REEL/FRAME:004837/0758
Owner name: SOUTH SHORE BANK, A TRUST COMPANY OF MA.,MASSACHU
Jul 8, 1986ASAssignment
Owner name: BOSTON MEDICAL PRODUCTS, INC., ("BMP"), 100 CHARLE
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:MONTGOMERY, WILLIAM W.;REEL/FRAME:004580/0313
Effective date: 19860627
Jul 8, 1986AS02Assignment of assignor's interest
Owner name: BOSTON MEDICAL PRODUCTS, INC., ("BMP"), 100 CHARLE
Effective date: 19860627
Owner name: MONTGOMERY, WILLIAM W.
Oct 5, 1984ASAssignment
Owner name: BARBER ENTERPRISES, INCORPORATED,
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:HOOD, EUGENE B.;REEL/FRAME:004338/0358
Effective date: 19840816
Owner name: E. BENSON HOOD LABORATORIES, INC.
Free format text: CHANGE OF NAME;ASSIGNOR:BARBER ENTERPRISES, INCORPORATED;REEL/FRAME:004338/0705
Owner name: ROCKLAND TRUST COMPANY 288 UNION ST., ROCKLAND, MA
Free format text: SECURITY INTEREST;ASSIGNOR:E. BENSON HOOD LABORATORIES, INC. A MA CORP.;REEL/FRAME:004336/0619
Owner name: ROCKLAND TRUST COMPANY,MASSACHUSETTS
Oct 5, 1984AS06Security interest
Owner name: E. BENSON HOOD LABORATORIES, INC. A MA CORP.
Owner name: ROCKLAND TRUST COMPANY 288 UNION ST., ROCKLAND, MA
Effective date: 19840816
Oct 5, 1984AS01Change of name
Owner name: BARBER ENTERPRISES, INCORPORATED
Owner name: E. BENSON HOOD LABORATORIES, INC.
Effective date: 19840816
Oct 5, 1984AS02Assignment of assignor's interest
Owner name: BARBER ENTERPRISES, INCORPORATED,
Effective date: 19840816
Owner name: HOOD, EUGENE B.