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 numberUS2463149 A
Publication typeGrant
Publication date1 Mar 1949
Filing date24 Nov 1947
Priority date24 Nov 1947
Publication numberUS 2463149 A, US 2463149A, US-A-2463149, US2463149 A, US2463149A
InventorsCaine Curtis W
Original AssigneeCaine Curtis W
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Endotracheal intubating stylet
US 2463149 A
Abstract  available in
Images(1)
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)

March 1, 1949.- c, w. c l E ENDOTRACHEAL INTUBATING STYLET Filed Nov. 24, 1947 IN VEN TOR.

Patented Mar. 1,1949

UNITED STATES PTENT OFFICE 2 Claims.

The present invention relates to a stylet adapted for use with an endotraoheal tube or catheter to facilitate insertion of the latter into the trachea.

As endotracheal tubes or catheters are usually made of soft flexible rubber or the like, it is very difficult to direct the, same between the vocal chords. In order to effectively overcome this difficulty, I provide an improved stylet adapted to be inserted in the tube to stiffen it and to anteriorly curve and distend its distal end into a laterally flattened cross sectional form substantially resembling the shape of the laryngeal opening. When the tube is thus conditioned, intubation may be accomplished with facility and speed.

To facilitate manipulation of the device during intubation and to fix the tube in proper relation to the stylet regardless of the length of the tube,

the stylet includes a relatively long stiff wire or rod having an elongated handle slidably adjustable on its proximal portion. The distal end of the handle is reduced to make a close sliding fit within the proximal end of the tube or within the usual coupling member which may be provided on the proximal end of the tube for use in connecting it to the control valve of apparatus used to supply oxygen or other gas to the lungs through the inserted tube. The distal portion of the wire or rod is gradually curved anteriorly and is composed of forwardly diverging spring arms adapted to distend antero-posteriorly and flatten laterally the corresponding portion of the tube.

The exact nature of the present invention will become apparent from the following description when considered in connection with the accompanying drawings, in which:

Figure 1 is side elevational view, partly broken away, of a stylet constructed in accordance with the present invention.

Figure 2 is a central longitudinal section, partly broken away, of the stylet of Figure 1 operatively associated with an endotracheal tube or catheter.

Figure 3 is a transverse section taken on line 3-3 of Figure 2.

Figure 4 is a transverse section taken on line 4-4 of Figure 2.

The present stylet is adapted for use in connection with a conventional endotracheal tube or catheter 5 which has a port 6 through the distal end thereof, and which is shown as provided at its proximal end with the usual coupling member I for use in connecting the tube or catheter to the control valve of apparatus commonly used to supply oxygen or other gas to the lungs through the tube when the latter is inserted into the trachea. This tube orcatheter is made of soft flexible rubber or the like, so that without a stylet it is difficult to direct the same between the vocal chords.

In order to facilitate insertion of the tube or catheter, I have provided an improved stylet which includes a relatively long stiff wire or rod t, the major portion of which is straight, and the remaining distal portion 9 of which is gradually curved anteriorly. The rod 8 is somewhat longer than the longest type of endotracheal tube, and the distal end portion thereof is composed of a pair of forwardly diverging spring arms lil having inturned free forward ends H. The arms it are normally tensioned to spring apart in such relation that they will flatten the distal portion of the tube 5 when disposed within the same as shown in Figure 2, thereby giving this portion of the tube a cross sectional form substantially resembling the shape of the laryngeal opening. The stylet further includes an elongated handle [2 having an axial bore 53 through which the rod 8 slidably extends. Thus, the handle i2 is slidably adjustable on the proximal portion of the rod 8, and it is provided with a set screw M which may be tightened into engagement with the rod 8 to secure the handle in adjusted position. As seen in Figure 4, the rod 8 is flattened at one side so that when it is impinged by the set screw M, relative rotation of the rod 8 and handle I2 is prevented. It will be seen that the distal end of handle i2 is reduced to provide a cylindrical portion l5 adapted to make a close sliding fit within the coupling member I and thereby effectively connect the proximal end of the tube with the handle so that they will not freely turn relative to each other. The reduced end portion i5 is provided with a tapered extension it which gradually reduces in diameter forwardly and acts to guide the coupling member 1 or the end of a tube not provided with such a coupling, onto the reduced end portion l5.

In using the present stylet, the parts thereof are lubricated to facilitate insertion of the same into the tube 5. Such insertion is carried out so that the distal ends I l of the arms It are located a slight distance inwardly of the open distal end of the tube 5 as shown in Figure 2. The handle [2 is then slid forwardly on rod 8 so as to enter the reduced portion l5 of the handle within the coupling l as shown. The set screw [4 is then tightened so as to secure the handle in this properly adjusted position, and it will be apparent that the degree of adjustment of the handle l2 which is necessary will depend upon the particular length of the tube 5 being employed. In Figure 3 the manner in which the arms distend and flatten the distal portion of the tube 5 will be apparent. After externally lubricating the tube 5, the assembly of Figure 2 will be held in one hand by grasping the handle I2 in a manner similar to that in. which an ordinary pencil is held while writing. The tube 5,, thus conditioned, may then be readily inserted into the trachea, no difficulty being experienced in directing the tube between the vocal chords. When intubation has been properly accomplished, the stylet is withdrawn from the tube, and the latter may then be coupled to the associated apparatus for supplying oxygen or other gas to the lungs through the inserted tube.

It will be understood that changes in the details herein described and illustrated may be made by tthose skilled in the art without departing from the spirit and scope of the invention as claimed.

:bored handle slidably adjustable on the proximal portion of said rod and' having a reduced distal portion adapted to make a close sliding fit Within the proximal end of the tube, the distal portion of the rod being composed of a pair of forwardly diverging spring arms tensioned to spring apart REFERENCES CITED The following references are of record in the file --of this patent:

UNITED STATES PATENTS Name Date Wappler, May 24, 1938 .Kleine July ,4, 1939 FOREIGN PATENTS Number Number Country flDate France Jan=. 18, 1906 France -LNOVQ 4, 1913 France -"Jan. 27',' 1921 OTHER REFERENCES Page 42 of Catalogue Catheters,=by- Anode, published in 1938 by :American Cystoscope Makers, 450-Whitlock Avenue, New' i lork city, New York.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US2118631 *3 Apr 193524 May 1938Charles Wappler FrederickCatheter stylet
US2164926 *2 Jun 19364 Jul 1939American Cystoscope Makers IncCatheter stylet
FR357892A * Title not available
FR459391A * Title not available
FR512640A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3867945 *14 May 197325 Feb 1975Wendell M LongCatheter stylets
US4166467 *8 Aug 19774 Sep 1979Metatech CorporationBite block for endotracheal tube
US4449522 *7 May 198222 May 1984Dragerwerk A.G.Positioning device for use with a tracheal tube which is insertable into a person's trachea for respiration purposes
US4659328 *12 Mar 198421 Apr 1987Biosearch Medical Products, Inc.Stylet
US4949716 *28 Nov 198921 Aug 1990Medical Devices, Inc.Nasal intubation adjunct
US5058577 *9 May 198922 Oct 1991Gary SixFlexible tip stylet for use with an endotracheal intubation device
US5111829 *18 Jan 199112 May 1992Boston Scientific CorporationSteerable highly elongated guidewire
US5507279 *30 Nov 199316 Apr 1996Fortune; John B.Retrograde endotracheal intubation kit
US5791341 *18 Dec 199611 Aug 1998Bullard; James RogerOropharyngeal stent with laryngeal aditus shield and nasal airway with laryngeal aditus shield
US5850832 *23 Jun 199722 Dec 1998Chu; Kyo Y.Laryngeal mask airway insertion guide
US6463927 *11 Mar 199815 Oct 2002Smiths Group PlcMedical tube assemblies
US6651665 *19 Feb 200225 Nov 2003Ibionics, Inc.Rotating magnetic guide intubation system
US6672305 *26 Feb 20016 Jan 2004Parker Medical Limited PartnershipShallow throat orotracheal intubation guide
US6701918 *27 Aug 20029 Mar 2004Ibionics CorporationMagnetically guided device for insertion through a nasal passageway
US6715491 *29 Jul 20026 Apr 2004Ibionics CorporationMagnetically orienting laryngeal elevator blade
US6820614 *2 Dec 200023 Nov 2004The Bonutti 2003 Trust -ATracheal intubination
US732031917 Nov 200422 Jan 2008Marctec, LlcMedicant delivery system and method
US7552729 *1 Mar 200230 Jun 2009The United States Of America As Represented By The Secretary Of The ArmyIntubation device and method
US8642948 *11 Sep 20094 Feb 2014Thermo Fisher Scientific (Bremen) GmbhIon trap for cooling ions
US874623918 Jul 200710 Jun 2014Douglas K. YoshidaExtendable lighted intubation stylet
US9381111 *17 Jun 20125 Jul 2016Dyson HickingbothamDelivery and extraction devices
US952685613 Dec 201227 Dec 2016The Board Of Trustees Of The Leland Stanford Junior UniversityDevices and methods for preventing tracheal aspiration
US97701945 Nov 201426 Sep 2017Ciel Medical, Inc.Devices and methods for airway measurement
US20020066450 *2 Dec 20006 Jun 2002Bonutti Peter M.Tracheal intubination
US20020195103 *1 Mar 200226 Dec 2002Government Of The United States, As Represented By The Secretary Of The ArmyIntubation device and method
US20050103333 *17 Nov 200419 May 2005Bonutti Peter M.Medical device positioning system and method
US20050103334 *17 Nov 200419 May 2005Bonutti Peter M.Medicant delivery system and method
US20080017195 *18 Jul 200724 Jan 2008Yoshida Douglas KExtendable lighted intubation stylet
US20090050146 *14 Aug 200826 Feb 2009The Cleveland Clinic FoundationApparatus and method for intubating an airway of a patient
US20090216066 *29 Apr 200927 Aug 2009Bonutti Peter MMagnetically assisted medication delivery method
US20100059048 *27 May 200911 Mar 2010Government Of The United States As Represented By The Secretary Of The ArmyIntubation device and method
US20110163227 *11 Sep 20097 Jul 2011Makarov Alexander AIon Trap for Cooling Ions
US20110224539 *15 Mar 201115 Sep 2011Bonutti Peter MMethods for positioning an ultrasonic catheter
US20130178822 *17 Jun 201211 Jul 2013Eyevation, LlcDelivery and extraction devices
USRE35595 *21 Oct 199326 Aug 1997Six; GaryFlexible tip stylet for use with an endotracheal intubation device
DE3334546A1 *23 Sep 198329 Mar 1984Viridian IncFuehrungssonde fuer eine schlauchanordnung zum einleiten und absaugen von fluiden in und aus dem magendarmtrakt eines patienten
Classifications
U.S. Classification128/200.26
International ClassificationA61M23/00, A61M16/04
Cooperative ClassificationA61M16/0488, A61M25/09
European ClassificationA61M16/04M