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Publication numberUS3225767 A
Publication typeGrant
Publication dateDec 28, 1965
Filing dateMar 13, 1964
Priority dateMar 13, 1964
Publication numberUS 3225767 A, US 3225767A, US-A-3225767, US3225767 A, US3225767A
InventorsSmith Clifford W
Original AssigneeSouth Chester Corp
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Tracheal tube device
US 3225767 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

Dec. 28, 1965 c. w. SMITH 3,225,767

TRACHEAL TUBE DEVICE Filed March 13, 1964 nlllilmwn United States Patent O 3,225,767 TRACHEAL TUBE DEVICE Cliord W. Smith, Upper Darby, Pa., assignor to South Chester Corporation, Lester, Pa., a corporation ot Delaware Filed Mar. 13, 1964, Ser. No. 351,759 Claims. (Cl. 12S- 351) This invention relates to tracheal tube devicespar ticularly tracheostomy cannulas. Such cannulas are also known as tracheotomy cannulas.

The purpose and use of tracheostomy cannulas are well known. Descriptions of tracheostomy cannulas, and the manner in which they are used, may be found in the literature and in such U.S. patent as 3,088,466, 2,923,299, 2,786,469, 2,765,792 and others.

Tracheostomy cannulas are curved tubes which are used in pairs, i.e., an outer cannula which is inserted into the trachea of the user and which may remain there more o1' less indefinitely, and an inner cannula which is a readily removable mucus-collecting tube which the user removes frequently for cleaning.

Locking means must be provided for securing the inner cannula in place within the outer cannula so that the inner tube will not become dislodged accidentally. However, the locking means must allow the user to release the inner cannula easily and readily, so that the inner cannula may be ,quickly and conveniently removed for cleaning.

The object of the present invention is to provide improved locking means for tracheostomy cannulas which allows the user to firmly yet releasably lock the inner cannula to the outer, and which allows the inner cannula to be easily and readily withdrawn.

In the drawing:

FIG. 1 is a perspective view illustrating the inner and outer tracheostomy cannulas in place at the neck of the user;

FIG. 2 is a perspective view showing the outer cannula at the neck of the user and with the inner cannula removed;

FIG. 3 is a front elevational view of the tracheostomy cannulas;

FIG. 4 is a side elevational view of the cannulas, partly in section; and

FIG. 5 is a plan view, partly in section, looking down along the lines V-V of FIG. 3.

In the drawing, the tracheostomy tube device is shown to comprise an outer cannula and an inner cannula 20. The outer and inner cannulas 10 and 20 are similarly curved, are almost the same length (the inner cannula being somewhat shorter) and are of such diameters that the inner cannula 20 fits easily but without play within the outer cannula 10. Both the outer and inner cannulas may preferably be formed of stainless steel or other noncorrosive resilient material.

The outer or proximal end of the outer cannula 10 is provided with a radial flange 12 which may preferably be generally oval-shaped. Flange 12 has a at central portion 14 and on each side thereof a wing portion 15 and 16. The wing portions 15 and 16 are canted slightly rearwardly, as best seen in FIG. 5, so that the oval flange 12 may rest conformably on the neck of the user.

Wing portions 15 and 16 are provided with slots, 17 and 18, respectively, for receiving the neck-band or strap 19 used to hold the tracheal device on the neck of the wearer.

Each of the wing portions 15 and 16 is provided with a tab, 35 and 36, respectively, located inward of the slots 17 and 18. The tabs 35 and 36 extend forwardly from the surface of the wing, and are inclined toward the axial ICC center of the cannula at an angle of about 23 relative to the cannula axis. Tabs 35 and 36 are formed by stamping out the wing material, and function as a pair of clips for receiving and releasably holding the inner cannula within the outer cannula, as will be described.

The inner cannula 20 terminates in a at annular llange 22 adapted to abut against the flat portion 14 of the flange 12 of outer cannula 10. Flange 22 of the inner cannula 20 is provided with a pair of upstanding apertured ears 25 and 26, at opposite sides of the flange 22. The ears 25 and 26 extend forwardly, and are inclined outwardly, away from the axial center of the cannula at an angle of about 30 relative to the cannula axis. The apertures 27 and 28 of ears 25 and 26 are D-shaped, with the flat side down.

The distance between the tips of the tabs and 36 of the outer cannula 10 is slightly less than the distance between the bases of the apertures 27 and 28 of ears 25 and 26, as will be seen in FIG. 5 by the solid line representation. Thus, when the inner cannula 20 is inserted fully into the outer cannula 10, the forward extremities or tips of tabs 35 and 36 engage the surfaces of ears 25 and 26 just below the flat bases of apertures 27 and 28. If a light inward pressure is then applied, as by the thumb and foretinger 41 of the wearer (see FIG. 5), the ears 25 and 26 are forced together slightly, as indicated in FIG. 5 by the dotted-line representation, and the tip portions of the tabs 35 and 36 enter the holes 27 and 2S in the ears 25 and 26. When the tips of the tabs 35, 36 are in the holes 27, 28, there is a very slight bit of play between the inner cannula 20 and outer cannula 10 which may be sensed by the thumb and foretinger 40 and 41 of the wearer. This informs the wearer that the inner cannula has been snapped into place.

To withdraw the inner cannula, as for cleaning, the wearer merely applies a slight compressing pressure to the ears 25 and 26, as by the thumb and forenger, as he pulls the inner cannula forward.

While the preferred embodiment of this invention has been described in some detail, it will be obvious to one skilled in the art that various modications may be made without departing from the invention as hereinafter claimed.

Having described my invention, I claim:

1. A tracheal tube assembly, comprising: a curved outer cannula and a similarly curved inner cannula formed of non-corrosive resilient material, said outer cannula being adapted for insertion into the trachea of a user, said inner cannula being insertable into said outer cannula, the proximal end of said outer cannula being provided with a radial flange having a at central portion and opposed wing portions, each of said wing portions having a tab which extends forwardly and inwardly, `said inner cannula having at its proximal end a at radial ange adapted for abutting against the at center portion of the outer-cannula ange, said inner-cannula flange being provided with oppositely-disposed apertured ears extending forwardly and outwardly, the normal distance between the tips of the tabs of the outer-cannula llange being slightly less than the normal distance between the apertured ears as measured between points located just below the apertures,

whereby when said inner cannula is being inserted intol said outer cannula the tabs of said outer-cannula flange engage the lower portion 0f the ears of said inner-cannula flange, forcing the ears slightly together until the tips of the tabs enter the apertures of the ears, thereby to releasably interlock said inner and outer cannulas.

2. A tracheal tube assembly as claimed in claim 1 characterized in that said inner and outer cannulas are of stainless steel.

3. A tracheal tube assembly as claimed in claim 2 characterized in that said tabs of said outer-cannular flange are inclined inward toward the axial center of said cannula at an angle of about 23 relative to the cannula axis, and further characterized in that said ears of said innercannula flange are normally inclined outward away from the cannula axis at an angle of about 30 relative to the cannula axis.

4. A tracheal tube assembly as claimed in claim 3 characterized in that the apertures in the ears of said innercannula flange are D-shaped with the flat side down.

5. A tracheal tube assembly as claimed in claim 4 characterized in that the wing portions of the outer-cannula ange are canted rearwardly.

References Cited by the Examiner OTHER REFERENCES Catalogue of V. Mueller and Company, Chicago, relating to the eye, ear, nose and throat, 7th edition 1929, pp.

RICHARD A. GAUDET, Primary Examiner.

DALTON L. TRULUCK, Assistant Examiner.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2765792 *Apr 17, 1953Oct 9, 1956Nichols Edgar BTracheal devices
US2786469 *Dec 18, 1953Mar 26, 1957William CohenTracheal tube assembly and tracheal plug
US3088466 *May 4, 1960May 7, 1963Nichols Edgar BTracheal devices
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3973569 *Aug 6, 1975Aug 10, 1976National Catheter CorporationTracheostomy tube device with neck size adjustment means
US3987798 *Mar 20, 1975Oct 26, 1976Lanz Medical Products CorporationTracheostomy tube and retainer
US4063561 *Sep 20, 1976Dec 20, 1977The Signal Companies, Inc.Direction control device for endotracheal tube
US4363320 *Sep 17, 1980Dec 14, 1982Michael KossoveBreathing airway
US4375811 *Feb 24, 1981Mar 8, 1983Future TeckSurgical ventilating apparatus
US4596579 *Apr 6, 1984Jun 24, 1986Pruitt Robert LVoice prosthesis with tracheal guard
US5060645 *Aug 14, 1990Oct 29, 1991Russell David NTracheostomy tube assembly
US5119811 *Feb 19, 1991Jun 9, 1992Smiths Industries Public Limited CompanyTracheal assembly having inner and outer tubes and surface materials
US5158569 *Dec 21, 1990Oct 27, 1992Ballard Medical ProductsCatheter placement locking and sealing device
US5165420 *Dec 21, 1990Nov 24, 1992Ballard Medical ProductsBronchoalveolar lavage catheter
US5199427 *Oct 18, 1991Apr 6, 1993Ballard Medical ProductsMulti-layered transtracheal caatheter
US5218957 *Oct 19, 1990Jun 15, 1993Ballard Medical ProductsMulti-layered transtracheal catheter
US5230332 *Oct 22, 1990Jul 27, 1993Ballard Medical ProductsMethods and apparatus for a micro-tracheal catheter hub assembly
US5246012 *Dec 19, 1991Sep 21, 1993Ballard Medical ProductsBronchoalveolar lavage catheter
US5285777 *Aug 8, 1991Feb 15, 1994Beckwith Wayne ETracheostomy apparatus
US5303697 *Feb 11, 1992Apr 19, 1994Brain Archibald Ian JeremyArtificial airway device
US5386826 *Feb 15, 1991Feb 7, 1995Smiths Industries Public Limited CompanyTracheal tube assemblies
US5390669 *Aug 9, 1993Feb 21, 1995Mallinckrodt Medical, Inc.Device using connector tube to lock inner cannula inside outer cannula
US7647929Sep 28, 2005Jan 19, 2010Nellcor Puritan Bennett LlcMedical device tube having a flange with opposing support ears for improved alignment and retention of an inner cannula in an outer cannula
US8146598Dec 4, 2009Apr 3, 2012Nellcor Puritan Bennett LlcMedical device tube having a flange with opposing support ears for improved alignment and retention of an inner cannula in an outer cannula
US8801695 *Jun 27, 2007Aug 12, 2014Covidien LpTracheostomy tube connector key system
US8936025Sep 26, 2006Jan 20, 2015Covidien LpTracheostomy tube and technique for using the same
US8997746Mar 5, 2012Apr 7, 2015Covidien LpMedical device tube having a flange with opposing support ears for improved alignment and retention of an inner cannula in an outer cannula
US9010326Aug 2, 2012Apr 21, 2015Covidien LpCompressible connector for an inner cannula
US20070255258 *Jun 27, 2007Nov 1, 2007Nellcor Puritan Bennett LlcTracheostomy tube connector key system
US20110083672 *Aug 12, 2010Apr 14, 2011Vanderbilt UniversityTracheostomy tube having a cuffed inner cannula
WO1992007603A1 *Oct 21, 1991May 14, 1992Ballard Med ProdMulti-layered transtracheal catheter
WO2007038562A1 *Sep 28, 2006Apr 5, 2007Nellcor Puritan Bennett IncMedical device tube having a flange with opposing support ears for improved alignment and retention of an inner cannula in an outer cannula
U.S. Classification128/200.26
International ClassificationA61M16/04
Cooperative ClassificationA61M16/0465, A61M2016/0427, A61M16/0497
European ClassificationA61M16/04M2, A61M16/04E