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Publication numberUS2541402 A
Publication typeGrant
Publication dateFeb 13, 1951
Filing dateJan 13, 1948
Priority dateJan 13, 1948
Publication numberUS 2541402 A, US 2541402A, US-A-2541402, US2541402 A, US2541402A
InventorsCurtis W Caine
Original AssigneeCurtis W Caine
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Endobronchial intubating stylet
US 2541402 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

Feb. 13, 1951 c. w. CAINE ENDOBRONCHIAL INTUBATING STYLET Filed Jan. 15, 1948 Crtis W. Caine IN VEN TOR.

Patented Feb. 13, 1951 UNITED STATES PATENT OFFICE The present invention relates to a stylet particularly adapted to facilitate insertion of an endobronchial tube or catheter into the desired bronchus.

An object of the present invention is to provide a" stylet including a flexible outer portion, and a removable inner stiffening portion which renders the outer portion rigid and inflexible and gently curves its distal portion anteriorly to facilitate passage between the vocal cords. A further object is to provide a stylet including an outer portion which is rigid longitudinally and flexible laterally so as to provide for positive longitudinal thrust and conformation tothe deflections of the upper respiratory passages from the axis of the human body.

Intubation of the right bronchus is relatively simple, but some difficulty is often encountered in getting a tube or catheter into the left bronchus because of the fact that it leaves the treachea at a more pronounced angle than the right bronchus.

A still further object of the present invention, therefore. is to provide an endobronchial intubating stvlet incl ding a flexible shaft having a hinged pilot or guiding ti on its distal end. a d means operab e from the proximal end of the stylet for an ulating the pilot or tip to direct it into the desired bronchus.

A further object of the invention is to provide a simple means to limit insertion of the stylet into the endobronchial tube or catheter in ac 'cordance with the length of the latter.

Still another object of the invention is to provide a stylet of the above kind which is comparatively simp e in construction efficient, easy to use. and economical to manufacture.

The exact nature of the present invention will become ap arent from the following description when considered in con ection with the accompanying drawing, in which:

Figure l is an elevational view of an endobronchial intubating stylet constructed in accordance with the present invention, with the inner stiffening rod thereof removed.

Figure 2 is a side elevational view of the inner stiffening rod of the present stylet;

Figure 3 is a view showing the complete stylet inserted within an endobronchial tube or catheter, the tube or catheter being partly in elevation and partly broken away and in section, and the catheter being partly in elevation and partly in central longitudinal section;

Figure 4 is an enlarged central longitudinal sectional view of the distal portion of the stylet;

3 Claims. (01. 128-351) Figure 5 is an enlarged transverse section taken on line 5-5 of Figure 3;

Figure 6 is an end elevation looking toward the proximal end of the complete stylet;

Figure 7 is a diagrammatic view illustrating the left bronchus intubated by the present stylet with the stiffening rod of the latter removed.

Referring in detail to the drawing, the illustrated embodiment of the invention consists of a stylet which includes a laterally flexible and resilient tubular shaft 5 consisting of a helical spring whose coils are closely wound to render the shaft rigid or non-compressible longitudinally, a hollow pilot or guiding tip 6 carried by the distal end of the shaft 5, and a circular peripherally knurled knob 1 threaded onto the proximal end of the shaft 5. The pilot or guiding tip 6 includes a rigid tubular proximal section 8 having a flared entrance and threaded into the distal end of shaft 5, and a hollow rigid distal section 9 hinged at one side to the corresponding side of the proximal section 8 as at [0 for adjustment to diiferent angular positions relative to the shaft 5 and section 8.

A flexible operating wire ll extends through the shaft 5 and its knob l and is pivotally attached at its distal end to the proximal end of the distal pilot section 9 as at I2, for use in ad justing the latter. A ring shaped finger piece I3 is provided on the proximal end of the operating wire II, and is disposed proximal of the knob I and faces in the same direction as the pilot section 9 may be angulated, by pulling said operating wire. A stop collar I! 4 is slidably disposed and ad iustable longitudinally on the shaft 5, and this stop, collar is adapted to form an abutment for engagement with the proximal end of an endobronchial tube I5, or the end fitting l6 of the latter, to limit insertion of the stylet into said tube in accordance with the length of the latter. It will of course be understood that an endobronchial tube or catheter is sometimes provided with the coupling member it for use in connecting the tube" or catheter to the control valve of an apparatus commonly used to supply oxygen or other gas to the lungs. In practice, the collar I4 is preferably made of rubber or similar material, and it has a snug frictional fit on the shaft 5 so that it may be manually adjusted and will effectively remain in adjusted position under ordinary conditions of use.

A removable substantially rigid stiffening rod 11 for the shaft 5 and pilot 6 is extended through said shaft into the distal pilot section 9 and has its distal portion gently deflected anteriorly to similarly deflect the pilot 6 and the distal portion of shaft as shown in Figures 2 and 3. A circular peripherally knurled knob I8 is provided on the proximal end of the stiffening rod I! and it abuts the knob 1 of the shaft 5. Knob I8 has a longitudinal slot IS in the same side thereof as the distal portion of rod I1 is deflected, which slot is adapted to accommodate the finger piece I3 and the adjacent portion of the operating wire Ii.

In practice, the tube I5 is fitted with an infiatable cuif or collar near its tip, according to common practice and as disclosed in the U- S. patent to P. W. Gebauer, No. 2,175,726, October 10, 1939. The stylet is assembled and thoroughly lubricated, and then inserted through the tube or catheter until the latter or its coupling member I6 abuts the stop collar I4 which has been ad-- justed to the proper point longitudinally of shaft 5, so that the pilot section 9 protrudes slightly beyond the distal end of the tube or catheter. The tube or catheter is then lubricated and the patient is anesthetized. With the use of a laryngoscope, the larynx is visualized as usual, and the tube or catheter with the complete stylet therein is inserted and passed between. the vocal chords. The assembled stylet provides a body for and imparts rigidity to the tube I5 so as to provide for accurate handling. The gentlecurvature of the distal portion of rod I1 is such that the axis of the distal pilot section 9 and the adjacent portion of tube I5 are in line with the upper portion of the trachea. With the rounded distal section a of the pilot protruding, intubation is made easy and atraumatic. The pilot will readily pass through a spastic larynx, and the tube will easily follow. The procedure is followed until the pilot and the distal portion of tube I5 are" a short distance past the vocal chords. For endobronchial intubation, the laryngoscope and. the stilfening rod H are removed, and the tube and the remainder of the stylet are further in troduced until the pilot reaches the carina. The wire I I is'then pulled to defiect'the pilot into the desired bronchus, as indicated by the direction in which the ring I3 is pointed. The tube and stylet, minus the stiffening rod, are introduced until the desired intubation is effected as shown in Figure 7 with the tube or catheter extending through the trachea 2!] and into the bronchus ZI. The proximal end of the tube or catheter is then held firmly, and the shaft 5 and pilot 6 are withdrawn from the tube or catheter. The inflatable cuif or collar, not shown, is then inflated, whereupon the tube or catheter is connected to the anesthetic machine. Thus, isolation of the contralateral lung and use only of the ipsolateral lung in respiration, are easily realized.

. The rigidity afforded by the present stylet insures accuratecontrol of the pilot, allowing it to be passed through the mouth outside the laryngoscope and leaving an unobstructed view of the larynx through the procedure of intubating the latter. The fiexible shaft of the stylet allows blind intubation of a bronchus so as to avoid the necessity of using a straight bronchoscopic intubating outfit. In this way, swift atraumatic and efficient intubation may be done, the flexible shaft conforming to the bends of the mouth, throat, larynx, and trachea.

From the foregoing description, it is believed that the construction, manner of use and advantages of the present invention will be readily understood and appreciated by those skilled in the art. Modifications and changes in details of construction are contemplated, such as fairly fall within the spirit and scope of the invention as claimed.

Having described the invention, What is claimed as new is:

1. In an endobronchial intubating stylet, a longitudinally rigid and laterally flexible tubur lar shaft having open ends, a hollow pilot carried by the distal end of said shaft and including a proximal section attached to-the shaft and adistal section having an open proximal end hinged at one side to the corresponding side, of the proximal section for adjustment to dilferent angular positions relative to the latter, a knob on the proximal end of said shaft, a flexible operating wire extending through the shaft and its knob and attached at its distal end to the opposite side of said proximal end of the distal pilot section for use in swinging and thereby angularly adjusting the latter, and a removable stiffening rod extended through the shaft into the distal pilot section and having an anteriorly deflected distal portion to similarlydefiect the pilot section and the distal portion of the shaft.

2. The construction defined in-claim l, in com:- bination with a ring shaped finger piece on the proximal end of the operating wire, and a knob on the proximal end of said stiffening rod abutting the knob of the shaft and having alongitudinal slot at one sideaccommodating the finger piece.

3'. The construction defined in claim- 1, in combination with a stop collar disposed on and adjustable longitudinally of the shaft and adapted to forman abutment for engagement with: the proximal end of an endobronchialtube-to limit insertion of the stylet therein in accordancewith the length of said tube.


REFERENCES CITED The following references are of record in the file of this patent:


Patent Citations
Cited PatentFiling datePublication dateApplicantTitle
US243396 *Mar 25, 1881Jun 28, 1881 Edwaed peaeee
US1920006 *Jul 26, 1932Jul 25, 1933Edward A Arnim JrProstatic catheter
US2024982 *Dec 19, 1934Dec 17, 1935Harry C ScottSurgical instrument
US2079233 *Aug 16, 1933May 4, 1937Charles Wappler FrederickTelescopic instrument
CH188982A * Title not available
Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US3314431 *Oct 5, 1964Apr 18, 1967Smith Jr Raymond MStylet for insertion of endotracheal catheter
US3417744 *Mar 15, 1966Dec 24, 1968Robert E. BidwellCatheter for selective bronchography
US3754554 *Feb 22, 1972Aug 28, 1973Felbarg HEndotracheal tube means
US3957055 *Sep 23, 1974May 18, 1976Linder Gerald SCatheter guide
US3996939 *Jul 22, 1975Dec 14, 1976National Catheter CorporationIntubation stylets
US4244362 *Nov 29, 1978Jan 13, 1981Anderson Charles CEndotracheal tube control device
US4263911 *Feb 8, 1979Apr 28, 1981Emergency Medical Devices, Inc.Hand actuated medical suction apparatus
US4449522 *May 7, 1982May 22, 1984Dragerwerk A.G.Positioning device for use with a tracheal tube which is insertable into a person's trachea for respiration purposes
US4898163 *Feb 27, 1989Feb 6, 1990George Gordon PTranstracheal airway and placement device
US4949716 *Nov 28, 1989Aug 21, 1990Medical Devices, Inc.Nasal intubation adjunct
US5058577 *May 9, 1989Oct 22, 1991Gary SixFlexible tip stylet for use with an endotracheal intubation device
US5163941 *May 7, 1991Nov 17, 1992California Medical ProductsIntubation device
US5235970 *Jun 23, 1992Aug 17, 1993Augustine Medical, Inc.Tracheal intubation with a stylet guide
US5360406 *Jul 7, 1993Nov 1, 1994Minnesota Mining And Manufacturing CompanyStylet for retrograde coronary sinus cannula
US5401244 *Apr 28, 1994Mar 28, 1995Minnesota Mining And Manufacturing CompanyMethod of, and stylet apparatus for, installing a retrograde coronary cannula
US5558082 *Jan 9, 1995Sep 24, 1996Spencer; Robert F.Method of intubating a patient and introducer for use with such method
US5672179 *Apr 22, 1992Sep 30, 1997Laerdal Medical CorporationIntubation device having stiffening member
US5791341 *Dec 18, 1996Aug 11, 1998Bullard; James RogerOropharyngeal stent with laryngeal aditus shield and nasal airway with laryngeal aditus shield
US6321749 *Sep 27, 1999Nov 27, 2001Merlyn Associates IncEndotracheal tube with tip directional control and position preserving mechanism
US6481436 *Mar 29, 2000Nov 19, 2002Smiths Industries Public Limited CompanyObturators and tube assemblies
US6553993Nov 27, 2001Apr 29, 2003Merlyn Associates, Inc.Endotracheal tube with tip directional control and position preserving mechanism
US6651665 *Feb 19, 2002Nov 25, 2003Ibionics, Inc.Rotating magnetic guide intubation system
US6672305 *Feb 26, 2001Jan 6, 2004Parker Medical Limited PartnershipShallow throat orotracheal intubation guide
US6701918 *Aug 27, 2002Mar 9, 2004Ibionics CorporationMagnetically guided device for insertion through a nasal passageway
US6715491 *Jul 29, 2002Apr 6, 2004Ibionics CorporationMagnetically orienting laryngeal elevator blade
US6761171Apr 4, 2002Jul 13, 2004Andrew J. TotiEndotracheal tube with tip directional control and position preserving mechanism
US6820614 *Dec 2, 2000Nov 23, 2004The Bonutti 2003 Trust -ATracheal intubination
US7013890 *Aug 20, 2002Mar 21, 2006Cms Surgical, Inc.Bronchial tube with an endobronchial Y-guide
US7320319Nov 17, 2004Jan 22, 2008Marctec, LlcMedicant delivery system and method
US8936554 *Mar 19, 2008Jan 20, 2015Stroke2Prevent B.V.Method and system for ultrasonic imaging of an organ in a patient's body through a part of the patient's respiratory tract
US9010320Mar 11, 2013Apr 21, 2015Furman Medical LlcManually articulated intubation stylet, intubation device and intubation method
US9364628 *Apr 27, 2012Jun 14, 2016Yonsei University Wonju Industry-Academic Cooperation FoundationCurvature-adjustable endotracheal tube
US20020066450 *Dec 2, 2000Jun 6, 2002Bonutti Peter M.Tracheal intubination
US20040035429 *Aug 20, 2002Feb 26, 2004Cardio Pulmonary Minimum Invasive Surgical Systems, Inc.Bronchial tube with an endobronchial Y-guide
US20050103333 *Nov 17, 2004May 19, 2005Bonutti Peter M.Medical device positioning system and method
US20050103334 *Nov 17, 2004May 19, 2005Bonutti Peter M.Medicant delivery system and method
US20080230056 *Mar 24, 2008Sep 25, 2008Benje BoedekerIntubation guide
US20080234584 *Mar 19, 2008Sep 25, 2008Cordatec NvMethod and System for Ultrasonic Imaging of an Organ in a Patient's Body Through a Part of the Patient's Respiratory Tract
US20090216066 *Apr 29, 2009Aug 27, 2009Bonutti Peter MMagnetically assisted medication delivery method
US20110224539 *Sep 15, 2011Bonutti Peter MMethods for positioning an ultrasonic catheter
US20130109918 *Jun 27, 2011May 2, 2013Smiths Medical International LimitedMedico-surgical assemblies
US20140041665 *Apr 27, 2012Feb 13, 2014Yonsei University Wonju Industry-Academic Cooperation FoundationCurvature-adjustable endotracheal tube
USRE34086 *Aug 10, 1990Oct 6, 1992 Medical placement device
USRE35595 *Oct 21, 1993Aug 26, 1997Six; GaryFlexible tip stylet for use with an endotracheal intubation device
DE3037708A1 *Oct 6, 1980Apr 8, 1982Hans HaindlTube-insertion instrument in windpipe - comprises bar with hook and handle at opposite ends
DE4403757A1 *Feb 7, 1994Sep 21, 1995Schulz Stuebner Sebastian Dr MGuide system for tube in endotracheal insertion
DE4403757C2 *Feb 7, 1994Feb 10, 2000Schulz Stuebner SebastianHifsvorrichtung für die Einführung eines Tubus
WO2011015811A1 *Jul 30, 2010Feb 10, 2011Michael MccooeEndotracheal tube
WO2012013916A1 *Jun 27, 2011Feb 2, 2012Smiths Medical International LimitedMedico-surgical assemblies
U.S. Classification128/200.26, D24/147
International ClassificationA61M25/01, A61B1/267
Cooperative ClassificationC10M2209/104, A61M25/0152, A61M25/09025, A61B1/2676
European ClassificationA61M25/01C10M, A61M25/09B1, A61B1/267D