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Publication numberUS3826248 A
Publication typeGrant
Publication dateJul 30, 1974
Filing dateSep 20, 1972
Priority dateSep 21, 1971
Also published asCA1011203A, CA1011203A1, DE2147054A1, DE2147054B2, DE2147054C3
Publication numberUS 3826248 A, US 3826248A, US-A-3826248, US3826248 A, US3826248A
InventorsG Gobels
Original AssigneeG Gobels
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 3826248 A
The invention relates to a laryngoscope for examining the larynx or the like comprising a handle element and a spatula detachable therefrom with a longitudinally extending lateral member serving as a tongue deflector.
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Description  (OCR text may contain errors)

United States Patent 1191 Gobels July 30, 1974' LARYNGOSCOPE 2,026,065 12/1935 R0111 128/16 x 1761 Inventor Georg 10, 5233533 311333 12.21321.3313331131::::::::::::'"':::: 123511 5038, Rodenklrche" near Cologne, 3,592,199 7/1971 Ostensen 128/6 7 Germany 3,598,113 8/1971 Moore 128/11 [22] Filed: Sept. 20, 1972 2] A L N 290,572 Primary Examiner-Channing L. Pace 1 1 PP 0 Attorney, Agent, or Firm-Diller, Brown, Ramik &

Wi ht I30] Foreign Application Priority Data g Sept. 21, 1971 Germany 2147054 [57] ABSTRACT [52] US. Cl. 128/11, 128/16 [51] Int. Cl A6lb 1/06, A61b l/24, A6lb 1/26 The invention relates to a laryngoscope for examining [58] Field of Search 128/ 10, 1 1, 12, l5, l6, 1 the larynx or the'like'comprising a handle element and 128/6 a spatula detachable therefrom with a longitudinally I extending lateral member serving as a tongue deflec- [56] References Cited tor.

UNITED STATES PATENTS Y D 104.874 6/1870 Osborn 128/15 7 Chums 6 Drawmg F'gures 3b 3 A 2 1b 1c 1 mg 7 F PMENIEBJuwmQM SHEEI 1 or 2 FIG.2

PAIENIEmugaoxm I SHEET 2 0? z LARYNGOSCOPE Laryngoscopes serve to keep free the oral cavity and the glottis by introducing the spatula into the mouth and by advancing the spatula front end into the throat gap. A tongue deflector or depressor presses the tongue aside so that the oral and throat cavities are unobstructed. Generally, the handle is fitted with an illuminating device permitting it to illuminate the throat cavity by means of a bulb. Such laryngoscopes are subjected to opposing conditions, namely, on the one hand are medical requirements relating to sterilization, life and safety, whereas on the other hand are the mechanical and electrical requirements relating to efficiency of performance and the like.

It is customary with conventional laryngoscopes to provide the handle and the spatula capable of-being coupled mechanically and electrically with respect to Moreover, the handle with the light source is destined for a plurality of applications, thus increasing the possibility for deficiencies and interferences concerning the illumination system. If during the treatment, the light source fails and the illumination collapses, valuable time may be lost during which medical help cannot take place, and, in particular in cases of emergency, e.g., for accidents, the rescue of the patient might be defeated.

Concerning circumstances resulting due to sterilization, and above all that of the spatula, solutions have been suggested which provide a measure of success. For a laryngoscope with the bulb fitted at the front end of the spatula the laryngoscope spatula is enwrapped by a sheathing placed longitudinally over the spatula. By this means only the sheath need be subjected to sterilization. However, the disadvantage of such anarrangement is that the thickness of the spatula cross section is relatively unwieldy. The result maybe additional coercions in the mouth and throat cavity. Moreover, the pressure of the upper incisors becoming effective on the lateral part of the tongue deflector is considerably increased. Furthermore, the mechanical and electrical sources of trouble are not excluded. By contrast, the fixture of the bulb and the control of its seat is still aggravated by the spatula sheath. It is also known to design the handle and the spatula as one single piece of the laryngoscope and to only provide interchangeability of the illuminating device together with the bulb. The reason for this is to realize an apparatus of a reasonable price which can be thrown away after one single use in order to do-away, with repeated sterilizations of the apparatus. The disadvantage connected therewith is that the'entire implement, viz. the handle and the spatula shall be thrown away after one single use, and this is relatively expensive. In addition thereto, the bulb insertable into the handle is always intended for multiple uses. Hence, it may happen that the illumination unexpectedly fails thus resulting in the disadvantages described above.

What all the known laryngoscopes have in common is that the spatula at the space, where it rests against the upper teeth of the jaw bone upon introduction of the laryngoscope into the mouth and the larynx gap is made of hard unelastic material. This is necessary because with the spatula there must be exerted forces to press back the inner parts of the mouth'and of the. throat, the spatula being then under bending stress. Moreover, there is caused a considerable pressure by the upper incisors on the lateral part of the spatula serving as a tongue deflector. It .is not uncommon that these stresses are such as toendanger the teeth and/or to break them from their seats in the jaw. The pressure exerted by the teeth on the spatula of the laryngoscope is sometimes as high as to cause scratches and notches on the metal surface of the rigid spatula, unless the tooth broke off or became loose in the jaw. Added to the problems of sterilization, mechanical, as well as electrical properties, is the problem of avoiding darnage to the teeth of the upper jaw of the patient under treatment.

It is an object of this invention to createa laryngoscope for larynx inspections or the like which takes into consideration the aforementioned problems and permitting a troublefreesafe operation from the mechanical as well'as from the illumination viewpoint, with the simultaneous simple solution of the sterilization problem.

For a laryngoscope with spatula detachable from the handle, the handle incorporating the illumination system and the spatula a light, the invention is characterized in that the spatula has at the rear of its tonguedeflector-side element an insert of elastic material and a bulb with light or current supply fixed in the spatula undemountably, the spatula with insert and bulb being provided as a disposable article.

By such a design of the laryngoscope or the spatula thereof there is obtained the best possible safety for its operating efficiency with respect to all the requirements to be demanded from the laryngoscope. All the sources of trouble which probably might become'effective are in the one-way single use, or disposable part which consists only of the spatula, so that the expendi ture for obtaining the optimum is held at a minimum. The elastic insert in the tongue-deflector side part of the spatula permits an impeccable and safe manipulation of the laryngoscope without the risk of breaking out teeth of the patient even in case of a rudimentary operation of the laryngoscope.

This brings about a greater safety during the performance of the medical work for the patient. The bulb being provided in the one way part entails the essential advantage that it is used only once. The risk of a failure of the bulb during the work with the laryngoscope is practically eliminated. A failure of the illumination due to a decrepit bulb is excluded. Added thereto isthe direct, firm arrangement of the bulb in the one-way part so that defective contacts and other. interruptions of current are completely excluded. Hence, avoided is the patient suffering damage due to a failure of the illumination.

While it is possible to sterilize a spatula with an insert of sterilizable material, the life of the elastic material is the safe illumination is solved in that each time the spatula is being used, an unused new bulb is available, and, on the other hand, that the electric contact faces at the coupling space of the spatula with respect to the handle part of the laryngoscope are always accurately clean and available for operation. For a sterilization of the spatula in the autoclave often causes an oxidation of the electric contact faces. As a result of the design of the laryngoscope according to the invention, requirements, otherwise incompatible, are complied with at an optimum in order to insure an operative laryngoscope efficient in any respect.

The elastic insert in the spatula may be constructed from rubber, plastic or the like. It should be suitably anchored in the lateral part of the spatula by means of undercut grooves extending in cross and longitudinal directions relative to each other. The rejectable spatula may be of any convenient material. It is advantageous to use plastic, whereby the rigidity of the spatula is guaranteed. The spatula must have a mat or darkcolored surface to avoid reflections resulting from the illumination.

It is advantageous to provide the bulb with its socket in the spatula foot. To this end, a light conductor, e.g. a glass fiber line or the like, or a prismatic piece, may lead to the front part of the spatula. It is also possible to fit the bulb at the front part of the spatula and to 7 connect it by a current, line with the contact points of the spatula foot.

The spatula itself is preferably fitted with a bent foot member thus facilitating the provision of the bulb in the spatula. Coupling of the bent foot member with the handle is accomplished by a sliding connection in cross direction relative to the spatula foot. To this effect, the spatula foot with its socket rail may engage in an undercut groove of the handle. At that occasion, the socket rail and the groove of the handle cooperate electrically by means of a contact tongue and contact pin. It is suitable to provide a taper i.e. a narrowing design of the socket rail and the undercut groove so that a firm seat is insured when the parts are pushed together.

With the above and other objects in .view that will hereinafter appear, the nature of the'invention will be more clearly understood by reference to the following detailed description, the appended claims and the several views illustrated in the accompanying drawings.

IN THE DRAWINGS FIG. 1 is an axial sectional view of the first embodiment of the laryngoscope of this invention, and illustrates an insert of elastic material carried by spatula.

FIG. 2 is a top plan view of the laryngoscope spatula and illustrates an open longitudinal canal for the elastic insert.

FIGS. 3 and 4 are cross sectional and top plane views, respectively, and illustrate coupling unit between handle and spatula.

FIG. 5 is an axial sectional view of a further embodiment of another laryngoscope according to the invention and illustrates a bulb directly housed in the spatula foot.

FIG. 6 is a top plan view of the spatula of the laryngoscope of FIG. 5.

The laryngo scope of FIGS. 1 to 4 has a handle 18 and a spatula 6, the spatula being provided with a longitudinally extending main body 1 with a first'end portion la thereof serving as a tongue deflector. The main body 1 4 of the spatula 6 contains an insert 3 of elastic material, e.g. of rubber, plastic or the like. This insert 3 is in the rear part or second end portion 1b of the spatula and serves for the elastic reception of the patients teeth when the spatula 6 with insert 3 rests against the teeth upon use of the laryngoscope. Insert 3 includes a surface 3b which forms a continuation of and merges with an uppermost surface 1c of the first end portion la. Anchorage of the elastic insert 3 is conveniently carried out in a longitudinal canal 4 with undercut front surfaces 4a and by means of an undercut cross groove 23 in cheeks 22, 22. In the tongue deflector or main body 1 of the spatula 6 a bulb 2 is located undemountably near the front end, and it is preferably soldered in place. Current supply lines 10, 11 extend in the canal 4 and in a bent foot member 7 to a socket rail 9 housing contact pieces 12 and 13. A contact tongue or switch 8 is provided in the socket rail 9 for making and breaking contact between the contact piece 12 and a contact pin 16. Spatula 6 with the elastic insert 3 and the elements of the illuminating system such as the bulb 2, supply lines 11' and 10 and contact pieces 12 and 13 permanently arranged in the spatula, form one unit which upon one single use is destined to be thrown away.

A handle 18 receives one or more insertable electric energy cells (flashlight batteries) 17. At the upper end of the handle 18 is a spatula holder 14 screwed in place in which is resiliently supported the contact pin 16 insulated with respect to the surrounding wall. Contact piece 13 is designed as a contact rail extending transversely relative to the longitudinal axis of the main body 1 with free ends of the rail resting firmly against the guide surfaces 15 of holder 14. Contact piece 13 may be also constructed as a spring contact supporting itself against the bottom of groove 21. The lower end of the handle 18 is closed by a detachable cap 19 which carries the support spring 20 for the cells 17.

The groove 21 is designed to slidably receive the rail 9 when the latter is progressively slid into the groove 21 from left-to-right as viewed in FIGS. 1 and 4. The guide surfaceslS, l5 converge from left-to-right in FIG. 4,

and, therefore, the rail 9 will reach a point where its surface configuration matches that of the groove 21 resulting in a binding therebetween. The guide surfaces 15, 15 additionally converge in an upward direction away from the bottom of the groove 21.

The spatula 6 and the spatula foot 7 with the socket rail 9 consist advantageously of black-colored plastic or the like with all the surfaces being mat. Black coloring has proven its quality as a contrast surface against the red mucosa of mouth and throat for the illuminating operation. The elastic insert 3 may be fitted laterally with a slight bulge 3a (FIG. 2) as an additional protection for a persons lips.

In the embodiment of the laryngoscope of FIGS. 5 and 6 identical elements are referred to with identical though primed numbers. The spatula 6 as a one-way piece is also fitted with an insert 3' of elastic material and anchored in the same way. The bulb 2' is however in the foot 7 and firmly fitted in a socket 24, e.g. soldered, which, at the same time serves as a contact for the counter-contact 16' in handle part 18. The spatula 6' is capable of being coupled with the handle 18' by means of thread 25. It is also possible to combine the elements by means of a bayonet connection. From light 2' a light conductor 26 leads to the front part of spatula 6 so that a good illumination of the rear throat cavity or. the like is insured. Also in this embodiment, the spatula 6' with all elements arranged therein, in particular with the elastic insert 3 and the firmly fitted lamp 2 as well as the light conductor 26, form a one-way unit insuring high functional efficiencyv While preferred forms and arrangements of parts a have been shown in illustrating the invention, it is to be clearly understood that various changes in details and arrangement of parts may be made without departing from the spirit and scope of this disclosure.

I claim:

1. A laryngoscope comprising a handle and a spatula, said spatula having a longitudinally extending main body which in turn has first and second opposite end portions, the first of said end portions being contoured to serve as a tongue deflector, said first end portion including an uppermost curved surface in use, a recess in said main body adjacent said second end portion, an

, insert of elastic material housed within said recess and having an uppermost surface in use merging with and forming a continuation of said first end portion uppermost curved surface, a bulb carried by said main body to illuminate the larynx cavity or the like, said handle including power means for illuminating said bulb, means for electrically detachably coupling said power means and bulb, means for mechanically detachably coupling said handle and spatula, and said mechanically and electrically detachable coupling means functioning to permit said spatula and bulb to operate as a single-use unit whereby upon one use of said laryngoscope said spatula and bulb may be discarded and replaced by a like though unused structure.

2. The laryngoscope as defined in claim 1 wherein the elastic insert is anchored in the spatula by means of undercut grooves.

3. The laryngoscope as defined in claim 1 wherein the bulb is fixed undismountably in the spatula and is provided with a light conductor.

4. The laryngoscope as defined in claim 1 wherein the bulb with its socket is fitted in a foot at the second end portion of the spatula and a light conductor leads to said first end portion of the spatula.

5. The laryngoscope as defined in claim 1 wherein the bulb is fitted in the first end portion of the spatula and is connected via a conduit with contact point of a spatula foot.

6. The laryngoscope as defined in claim 1 wherein the spatula has a foot at the second end portion of the spatula and said mechanical coupling means is a sliding connection between said foot and said handle.

7. The laryngoscope as defined in claim 6 wherein the spatula foot has a socket rail engageable in an undercut groove of the handle, the socket rail and the undercut groove being chamfered, and the socket rail and the handle groove coact electrically by means of a contact tongue and a contact pin.

Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US104874 *Jun 28, 1870 Improvement in tongue-holder for dentists
US2026065 *Feb 8, 1933Dec 31, 1935Rohr Carl PDental apparatus
US3426749 *May 13, 1966Feb 11, 1969Longworth Scient Instr Co LtdDisposable cover for laryngoscope blade
US3507272 *Feb 15, 1968Apr 21, 1970Laerdal A SLaryngoscope
US3592199 *Feb 9, 1970Jul 13, 1971Medical Products CorpAutoclavable surgical instrument illumination
US3598113 *Oct 9, 1968Aug 10, 1971Welch Allyn IncDisposable laryngoscope construction
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4037588 *Mar 15, 1976Jul 26, 1977Richard Wolf GmbhLaryngoscopes
US4295465 *Apr 3, 1980Oct 20, 1981N.A.D., Inc.Laryngoscope blade
US4557256 *Jul 23, 1984Dec 10, 1985Jack BaumanExamination device with an improved blade connection
US4570614 *Jan 4, 1985Feb 18, 1986Jack BaumanLaryngoscope with disposable blade and light conductor
US4573451 *Nov 8, 1984Mar 4, 1986Jack BaumanLaryngoscope blade with a bendable tip
US4579108 *Jan 4, 1985Apr 1, 1986Jack BaumanLaryngoscope blade and disposable cover
US4583528 *Nov 8, 1984Apr 22, 1986Jack BaumanExamining device with improved optical coupling between the light source and light conductor
US4607623 *Nov 8, 1984Aug 26, 1986Jack BaumanUnitary insert support frame for the handle of an examining device
US4669449 *Feb 18, 1986Jun 2, 1987Jack BaumanSubmergible laryngoscope metallic housing for fiber optics power source
US4679547 *Feb 19, 1986Jul 14, 1987Jack BaumanFluid submersible laryngoscope
US4694822 *Apr 1, 1986Sep 22, 1987Jack BaumanSubmergible laryngoscope battery housing
US4729367 *Jan 27, 1987Mar 8, 1988Jack BaumanSubmergible laryngoscope with handle fluid sealing means
US4924855 *Jul 25, 1988May 15, 1990Albert SalernoLaryngoscope blade
US4947896 *Nov 4, 1988Aug 14, 1990Bartlett Robert LLaryngoscope
US4958624 *Mar 31, 1989Sep 25, 1990Welch Allyn, Inc.Interchangeable laryngeal blade
US5060633 *Aug 31, 1990Oct 29, 1991Gibson Michael SLaryngoscope blade
US5178131 *Apr 30, 1991Jan 12, 1993Upsher Laryngoscope CorporationWaterproofed laryngoscope handle
US5431153 *Jun 11, 1993Jul 11, 1995Lee; HansSurgical apparatus for assisting in the release of the carpal tunnel
US5438976 *Nov 29, 1993Aug 8, 1995Nash; Jeanne L.Teeth protector for laryngoscope blade
US5501651 *Jun 13, 1994Mar 26, 1996Bauman; JackFluid submersible laryngoscope preventing electrolytic current flow
US5542904 *Aug 22, 1994Aug 6, 1996Heine Optotechnik Gmbh & Co. KgHandgrip for an electro-optical diagnostic apparatus set
US5542905 *Jan 5, 1995Aug 6, 1996Propper Manufacturing Co., Inc.Switch mechanism for use in a laryngoscope handle
US5776053 *Apr 15, 1997Jul 7, 1998Dragisic; Branislav M.Laryngoscope blade with protective insert
US5879304 *Mar 29, 1996Mar 9, 1999Truphatek International Ltd.Single use laryngoscope blade
US6106458 *May 5, 1997Aug 22, 2000Ha; DaAnesthetic laryngoscope with manual controlled oxygen ejection means
US6626829Mar 5, 2002Sep 30, 2003Eddie W. SkaggsLaryngoscope and method
US6666819 *Dec 5, 2001Dec 23, 2003Heine Optotechnik Gmbh & Co. KgLaryngoscope
US7044910Aug 12, 2003May 16, 2006Cartledge Medical Products, Inc.Modified laryngoscope blade to reduce dental injuries during intubation
US7736304Feb 29, 2004Jun 15, 2010Truphatek International Ltd.Metal laryngoscope blade
US7909759Nov 22, 2005Mar 22, 2011Truphatek International LtdHandheld penknife-like laryngoscope
US8142353Jul 9, 2009Mar 27, 2012Truphatek International Ltd.Metal laryngoscope blade with illumination assembly
US8162826Mar 11, 2008Apr 24, 2012Truphatek International Ltd.Laryngoscopes and rechargeable illumination units for use therewith
US8251898Aug 7, 2008Aug 28, 2012Truphatek International LtdLaryngoscope apparatus with enhanced viewing capability
US8394016 *Jul 2, 2009Mar 12, 2013Bruce Cabot ArnéIlluminated airway article
US8512234Apr 4, 2012Aug 20, 2013Truphatek International Ltd.Laryngoscope assembly with enhanced viewing capability
US9386913 *Aug 18, 2011Jul 12, 2016Throat Scope Pty LtdTongue depressor
US20040034281 *Aug 12, 2003Feb 19, 2004Richard CartledgeModified laryngoscope blade to reduce dental injuries during intubation
US20060241501 *Apr 7, 2006Oct 26, 2006Zila Pharmaceuticals, Inc.Method and apparatus for detecting abnormal epithelial tissue
US20070129606 *Feb 29, 2004Jun 7, 2007Eugeny PechererMetal laryngoscope blade
US20070197876 *Feb 17, 2006Aug 23, 2007Lane Edward DDental guard for airway intubation
US20080004498 *Nov 22, 2005Jan 3, 2008Eugeny PechererHandheld Penknife-Like Laryngoscope
US20080255462 *Apr 10, 2008Oct 16, 2008Zila Pharmaceuticals, Inc.Light stick
US20090271286 *Mar 16, 2009Oct 29, 2009Commerce Technology Licensing, L.L.C.Method and system for customizing marketing services on networks communicating with hypertext tagging conventions
US20100022843 *Mar 11, 2008Jan 28, 2010Eugeny PechererLaryngoscopes and rechargeable illumination units for use therewith
US20100041953 *Jul 9, 2009Feb 18, 2010Truphatek International Ltd.,Metal laryngoscope blade with illumination assembly
US20110060190 *Aug 7, 2008Mar 10, 2011Truphatek International Ltd.Laryngoscope apparatus with enhanced viewing capability
US20130158358 *Aug 18, 2011Jun 20, 2013Throat Scope Pty LtdTongue depressor
DE9313009U1 *Aug 30, 1993Nov 4, 1993Heine Optotech KgHandgriff für einen elektro-optischen Diagnosegerätesatz
EP0030014A1 *Nov 27, 1980Jun 10, 1981Michael S. UpsherA combination of a laryngoscope and a flexible tube
EP0110333A2 *Nov 27, 1980Jun 13, 1984Michael S. UpsherImproved laryngoscope
EP0110333A3 *Nov 27, 1980Oct 24, 1984Michael S. UpsherImproved laryngoscope
EP0233761A2 *Feb 13, 1987Aug 26, 1987Jack BaumanSubmergible laryngoscope metallic housing for battery
EP0233761A3 *Feb 13, 1987Nov 11, 1987Jack BaumanSubmergible laryngoscope metallic housing for battery
EP0872209A1Apr 14, 1998Oct 21, 1998Branislav M. DragisicLaryngoscope blade with protective insert
WO1983001373A1 *Oct 15, 1982Apr 28, 1983Upsher, Michael, S.A laryngoscope including a separate disposable blade and its methode of use
WO1996020634A1 *Dec 29, 1995Jul 11, 1996Propper Manufacturing Co., Inc.Switch mechanism for use in a laryngoscope handle
U.S. Classification600/193, 600/195, 600/199
International ClassificationA61B1/273, A61B1/267, A61B1/24
Cooperative ClassificationA61B1/06, A61B1/267
European ClassificationA61B1/267, A61B1/06