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Apparatus for oral anesthesia

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US2638096A
US2638096A US12617649A US2638096A US 2638096 A US2638096 A US 2638096A US 12617649 A US12617649 A US 12617649A US 2638096 A US2638096 A US 2638096A
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Prior art keywords
catheter
end
fig
tube
signal
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Edith A Waldhaus
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Edith A Waldhaus
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/04Tracheal tubes
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0003Accessories therefor, e.g. sensors, vibrators, negative pressure
    • A61M16/0006Accessories therefor, e.g. sensors, vibrators, negative pressure with means for creating vibrations in patients' airways
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/0051Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes with alarm devices
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/08Bellows; Connecting tubes ; Water traps; Patient circuits
    • A61M16/0816Joints or connectors
    • A61M16/0833T- or Y-type connectors, e.g. Y-piece
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M16/00Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
    • A61M16/08Bellows; Connecting tubes ; Water traps; Patient circuits
    • A61M16/0816Joints or connectors
    • A61M16/0825Joints or connectors with ball-sockets
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61MDEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00General characteristics of the apparatus
    • A61M2205/58Means for facilitating use, e.g. by people with impaired vision
    • A61M2205/581Means for facilitating use, e.g. by people with impaired vision by audible feedback

Description

May 12, 1953 E. A. wALDHAUs 2,638,096

""'APPARATUS FOR ORAL ANESTHESIA Filed Nov. 8, 1949 num-g ATTORNEY Patented May 12, 1953 UNITED STATES PATENT OFFICE 2,638,096 APPARATUS Fon oRAL ANEsTHEsIA l s Edith A. Waldhaus, Birmingham, Ala.. l Application` November 8, 1949, Serial No. 126,176

This invention relates to the art of administering anesthesia through a patients mouth and throat Where this is made necessary by circumstances which prevent nasal administration.

An object of the` invention is to simplify. ex-

pedite and make safer the technique of intubation of an intratracheal catheter by alici-ding prompt and reliable evidence of whether the inner invisible end of the catheter tube has been inserted properly in the trachea of the patient, since it can easily happen that the catheter will improperly enter the esophagus.

A contributory object of the present improvements is to provide a device that will sound a clearly audible signal, giving positive evidence of even feeble breathing through the catheter, and to make such signal device applicable to the outer end of the catheter in a manner not to interfere with the patients breathing.

A related objective is to arrange such signal device to be instantly detachable from the outer end of the catheter tube and replaced by conduit means for supplying gaseous anesthetic Without danger of any nerve irritating disturbance of the inserted end of the tube while it re mains in the patients throat.

These and associatedobjects of the` invention will become apparent in fuller detail as the description proceeds, the following specification having reference to the accompanying drawing disclosing a successfu1 embodiment of the invention in which drawing! Fig. 1 is a view showing intubation of a tracheal catheter with an audible signal devicetemporarily applied thereto for the purpose of the invention.

Fig. 2 shows in practicalactual size the trachea catheter of Fig. 1 with myV improved signal device removably in place thereon. f

Fig. 3 is a fragmentary'plan view of the subject of Fig. 2.

Fig. 4 is an enlarged view of the signal device detached from the catheter tube shown partially in section on a central vertical plane.

Fig. 5 is an enlarged sectional view of the sound causing structure removed from the signal device of Fig. 4.

Fig. 6 shows a modified construction of the signal device adapting it to a catheter having a bare tubular end.

Fig. 7 shows the catheter terminal of Figs. 1 and 2 connected to a source of gaseous anesthetic after temporary test use and removal of the signal-giving device.

In Fig. l conventional surgical anesthesia ap- 6 Claims. (Cl. 12S-348) paratus is represented by upright pressuretanks or cylinders I2, I 4 containing any of variousanesthetic gases such as ethylene, nitrous oxide, ,carbon oxide, oxygen, ether, cyclopropane with helum, etc. The cylinders` I2 and I4 may be supported by a floor stand I5 which may be of the cabinet type presenting a shelf I6 carrying the hook Il on which is hung, so as to be instantly available for use, a T.shaped adaptor I8 branching into conduit connection with corrugated flexible respiration tubings I9, 20. These communicate with the usual bag, absorber, and other conventional parts of the apparatusI including control valves serving to condition and proportion the delivery of gas mixtures to the ,lungs of the patient. i The open end 2I of T-shaped adaptor I8 may have a slip fit on a metallic connector 22 which may be xedly lodged in the outer end of the trachea catheter tube 23 to form the outer terminal thereof. The tube is usually ofsemi-soft rubber molded to somewhat torio-like curvature for conformity with the throat passage of a prone patient. In Fig.- 6, however, the walls ofthe catheter tube 23 at its outer end are merely flared outward conically to form the tubeterminal, no connector such as 22 being present. When a connector such as 22 is present. it may conveniently consist of a knurled flange 26 somewhat larger lindiameter than the catheter tube integral with a `nipple 2l xedly lodged in the end of the tube and also integral with anoutwardly projecting open `ended barrel 28 exposed to receive the T-adaptor I'8 with a slide iitA therebetween. I T-adaptor I8 `incorporates aswivel jointat2ll.` f y 5 -According'to the present improvements, when connectiony isv broken between adaptorv I- and connector 22,' the latter remains embedded in the catheter tube 23 and its exposed barrel 28 is therefore always ready to receive my improved audible signal-giving device 3l which thereby forms a partial closure for the tube terminal and thus throttles the outer end of the catheter to a certain extent when temporarily-and removably applied thereto as shown in Fig. 1. If the catheter is properly placed in the trachea, this fact will be evidenced at once by a whistle-like sound generated at orifices 32 and 33 of the signal device, these orices being large enough to pass a now of air into and out of the catheter tube sumcient to sustain normal breathing of the patient combined with a tubular catheter having an inside diameter of or thereabouts if the hole or holes are round and, say .111" to .134 in diameter. Successfully loud sound is produced if both holes are close to 1/8 in diameter. However. I have found that the sound-producing ability becomes impaired if the holes are made as large as .175" in diameter. Hence it is necessary that these holes lie Within some range of sizes sufficiently smaller than the air passageway through the catheter tube to considerably throttle the open end of the latter. The extent of throttling must not interfere with safe breathing of.' the patient but must be suiiicient to speed up and..

vibrate to an audible frequency the flow of air into or out of the tube induced by the respira tion of the patient. In this sense the soundv producing unit, shown detached in Fig. 5; constitutes a partial closure for the outer endjvof the Y catheter.

. Coni/enientlyl may construct the sound. unit c'fliig. 5 as; asonant insert of three sheet-metal parts comprising a drawn metal cup-shaped reso- .n'ance chamber 35, a cap 36 covering and crimped over'the larger top end of chamber 35 containing the hole 3,2, and a baille disc 3l upset to produce 'the central hole 33 therein -bordered by rim prongs which protrude through an opening in the small end of the drawn metal cup 35 and are eyeletted over into interlocking relation tothe cup. The external annular flange lportion .Tl of ,thedisc is of size to be lrictionally lodged in an opening 38 in the head 39 of the signal device 3l with a' press fit. This thimble-like signal device further includes a rigid shell 40 having an open mounting end and having at its opposite end a transverse h ead wall containing the aforesaid resonance chamber, `and a knurled flange :il

affording-'the maximum girth of shell mi by 'stream passing through holes 32 and 33 in either direction and makes the Whistling sound 'loud enough to be audible .in case of the most shallow breathing.

"In Fig. 6 the 'cylindrical mounting barrel 40 'of 'a 'modified signal device 3|' is replaced by a lconically tapered barrel Ml' which is capable of fitting and being lodged removably in the bare "rubber end of catheter tubes of different Ysizes represented 'by the end portion 23 -of a catheter ftube flared .by stretching it Vonto the barrel 40.

The appended claims are directed to and intended to cover all variations and equivalents of the size, shape and arrangement of parts herein chosen to illustrate the principles of the invention that fairly come within the broadest interpretation of the definitive terms used in the claims.

I claim:

1. Apparatus for testing momentarily without disturbing the patient the properl intubation of an oral catheter inserted into the trachea, comprising in combination with an intra-tracheal catheter having a tubular terminal at its outer end, a test appliance comprising a perforate Whistle affording unit mounted on said terminal and' removably fitting said terminal in a manner to be joined quickly therewith and separated vtherefrom without disturbing the inserted portion of the catheter While it occupies the patients throat, said Whistle affording unit comprising a partial closure for saidterminal containing a vent giving the catheter restricted communicaf tion with ambient air and forming the sole source of respiratory gas available to the patient through said catheter, said vent being of size, shape and arrangement to vibrate into clearly audible sound waves weak streams of air impelled gently through said Avent by feeble breathing of the patient.

2. Test apparatus` as defined in claim 1, in which the said Whistle affording unit includes walls confining a space forming a resonance chamber and containing `substantially co-aXial holes, one of said holes opening to the said catheter and thevother of said holes openingto ambient air.

3. Test apparatus 'as defined in claim 2, in which at least one of the said holes is substantially round and less than .175" in diameter. A

e. lest apparatus as defined in 'claim 2. in which yeach of the said holes is substantially round and less than .175" in diameter. f 5. Test apparatus as dened in claim 2, in which each of the said holes Ahas a diameter of between .118" and .143".

6. Test apparatus as defined in claim 2, in which the said resonance chamber comprises a tapering cup-shaped barrel closed at its larger 'end by a transversely extending cap, said cap and the smaller end of said cup-shaped barrel respectively constituting the said Walls.

EDrrH A. WALDHAUS.

References cited in .the fue of tnis'patent UNITED 's'rrrrss PATENTS Swindle Dec. 7 '1943

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Cited By (43)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2750938A (en) * 1955-01-24 1956-06-19 Bier Emanuel Roy Oropharyngeal airway and suction tube
US3461877A (en) * 1966-03-02 1969-08-19 Ernst Trier Morch Tracheostomy tube construction
US3599642A (en) * 1967-03-20 1971-08-17 Roland L Tindel Endotracheal tubes
US3670726A (en) * 1969-09-23 1972-06-20 Becton Dickinson Co Breathing circuit
US3814103A (en) * 1973-03-08 1974-06-04 Shiley Labor Inc Binasal pharyngeal airway
US4052990A (en) * 1973-04-16 1977-10-11 Smiths Industries Limited Medico-surgical tube and adaptor
US4063561A (en) * 1975-08-25 1977-12-20 The Signal Companies, Inc. Direction control device for endotracheal tube
US4146034A (en) * 1977-06-02 1979-03-27 Shiley Scientific, Inc. Endotracheal tube connector
US4270778A (en) * 1979-05-03 1981-06-02 Sherwood Medical Industries Inc. Tube connector with security means
US4351328A (en) * 1980-03-27 1982-09-28 Sontek Industries, Inc. Simultaneous respiration and endotracheal suctioning of a critically ill patient
US4691701A (en) * 1986-07-28 1987-09-08 Tudor Williams R Carbon dioxide detector
US4728499A (en) * 1986-08-13 1988-03-01 Fehder Carl G Carbon dioxide indicator device
US4879999A (en) * 1986-03-26 1989-11-14 Board Of Regents, The University Of Texas System Device for the determination of proper endotracheal tube placement
US4919127A (en) * 1988-05-03 1990-04-24 Pell Donald M Endotracheal tube connector
US4928687A (en) * 1988-10-11 1990-05-29 The University Of Florida CO2 diagnostic monitor
US5083560A (en) * 1990-06-11 1992-01-28 Tillery Jr Joe B Respiration monitor
US5095896A (en) * 1991-07-10 1992-03-17 Sota Omoigui Audio-capnometry apparatus
US5156159A (en) * 1988-10-11 1992-10-20 University Of Florida CO2 diagnostic monitor with rupturable container
US5335655A (en) * 1992-09-10 1994-08-09 Sherwood Medical Company Suction control valve
US5360003A (en) * 1993-06-11 1994-11-01 Capistrano Cecilio L Intubation assembly and method of inserting same having a balloon to indicate the position of tube inside of the patient
US5415161A (en) * 1993-09-15 1995-05-16 Ryder; Steven L. Intermittant demand aerosol control device
US5487731A (en) * 1994-02-22 1996-01-30 Wolfe Tory Medical, Inc. Esophageal intubation detector with indicator
US5591130A (en) * 1994-02-22 1997-01-07 Wolfe Troy Medical, Inc. Esophageal intubation detector with indicator
US5749358A (en) * 1996-10-10 1998-05-12 Nellcor Puritan Bennett Incorporated Resuscitator bag exhaust port with CO2 indicator
US5803078A (en) * 1994-05-06 1998-09-08 Brauner; Mark E. Methods and apparatus for intrapulmonary therapy and drug administration
US5885248A (en) * 1994-02-22 1999-03-23 Wolf Tory Medical, Inc. Intubation detection system with transducer based indicator
US6070582A (en) * 1996-09-10 2000-06-06 Sherwood Services, Ag Suction control valve
US6349720B1 (en) * 1998-06-25 2002-02-26 Integrated Medical Systems, Inc. Apparatus for acoustically determining position of an endotracheal tube
US6386196B1 (en) * 2000-03-13 2002-05-14 Steven E. Culton Warning device for oxygen delivery system failure
US6526976B1 (en) 1994-06-17 2003-03-04 Trudell Medical Limited Nebulizing catheter system and method of use and manufacture
US6729334B1 (en) 1994-06-17 2004-05-04 Trudell Medical Limited Nebulizing catheter system and methods of use and manufacture
US20070083094A1 (en) * 2005-10-11 2007-04-12 Colburn Joel C Medical sensor and technique for using the same
WO2007141787A1 (en) * 2006-06-06 2007-12-13 Sagi Giladi A device and method for assisting placement of a tube device through a body passage
US20080075633A1 (en) * 2006-09-25 2008-03-27 Rafael Ostrowski Carbon dioxide detector having borosilicate substrate
US20080072913A1 (en) * 2006-09-25 2008-03-27 Baker Clark R Carbon dioxide-sensing airway products and technique for using the same
US20080076993A1 (en) * 2006-09-27 2008-03-27 Nellcor Puritan Bennett Incorporated Medical sensor and technique for using the same
US20080078394A1 (en) * 2006-09-25 2008-04-03 Rafael Ostrowski Carbon dioxide detector having borosilicate substrate
US20080081003A1 (en) * 2006-09-25 2008-04-03 Rafael Ostrowski Carbon dioxide detector having borosilicate substrate
US20080083265A1 (en) * 2006-09-25 2008-04-10 Rafael Ostrowski Carbon dioxide detector having borosilicate substrate
US20090165801A1 (en) * 2007-12-31 2009-07-02 Nellcor Puritan Bennett Llc Carbon dioxide detector having an acrylic based substrate
US20090246797A1 (en) * 2008-03-28 2009-10-01 Nellcor Puritan Bennett Llc Medical device for the assessment of internal organ tissue and technique for using the same
US7811276B2 (en) 2005-11-10 2010-10-12 Nellcor Puritan Bennett Llc Medical sensor and technique for using the same
US8062221B2 (en) 2005-09-30 2011-11-22 Nellcor Puritan Bennett Llc Sensor for tissue gas detection and technique for using the same

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1270565A (en) * 1914-10-17 1918-06-25 Teter Mfg Company Pharyngeal inhaler.
US2269823A (en) * 1939-11-24 1942-01-13 Kreiselman Joseph Insufflation apparatus
US2376971A (en) * 1943-03-18 1945-05-29 Morris W Kleit Sonant respiration indicator
US2455533A (en) * 1948-01-26 1948-12-07 John A Swindle Combined safety and sound-producing device for radiators

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1270565A (en) * 1914-10-17 1918-06-25 Teter Mfg Company Pharyngeal inhaler.
US2269823A (en) * 1939-11-24 1942-01-13 Kreiselman Joseph Insufflation apparatus
US2376971A (en) * 1943-03-18 1945-05-29 Morris W Kleit Sonant respiration indicator
US2455533A (en) * 1948-01-26 1948-12-07 John A Swindle Combined safety and sound-producing device for radiators

Cited By (60)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2750938A (en) * 1955-01-24 1956-06-19 Bier Emanuel Roy Oropharyngeal airway and suction tube
US3461877A (en) * 1966-03-02 1969-08-19 Ernst Trier Morch Tracheostomy tube construction
US3599642A (en) * 1967-03-20 1971-08-17 Roland L Tindel Endotracheal tubes
US3670726A (en) * 1969-09-23 1972-06-20 Becton Dickinson Co Breathing circuit
US3814103A (en) * 1973-03-08 1974-06-04 Shiley Labor Inc Binasal pharyngeal airway
US4052990A (en) * 1973-04-16 1977-10-11 Smiths Industries Limited Medico-surgical tube and adaptor
US4063561A (en) * 1975-08-25 1977-12-20 The Signal Companies, Inc. Direction control device for endotracheal tube
US4146034A (en) * 1977-06-02 1979-03-27 Shiley Scientific, Inc. Endotracheal tube connector
US4270778A (en) * 1979-05-03 1981-06-02 Sherwood Medical Industries Inc. Tube connector with security means
US4351328A (en) * 1980-03-27 1982-09-28 Sontek Industries, Inc. Simultaneous respiration and endotracheal suctioning of a critically ill patient
US4879999A (en) * 1986-03-26 1989-11-14 Board Of Regents, The University Of Texas System Device for the determination of proper endotracheal tube placement
US4691701A (en) * 1986-07-28 1987-09-08 Tudor Williams R Carbon dioxide detector
US4728499A (en) * 1986-08-13 1988-03-01 Fehder Carl G Carbon dioxide indicator device
US4919127A (en) * 1988-05-03 1990-04-24 Pell Donald M Endotracheal tube connector
US4928687A (en) * 1988-10-11 1990-05-29 The University Of Florida CO2 diagnostic monitor
US5156159A (en) * 1988-10-11 1992-10-20 University Of Florida CO2 diagnostic monitor with rupturable container
US5083560A (en) * 1990-06-11 1992-01-28 Tillery Jr Joe B Respiration monitor
US5095896A (en) * 1991-07-10 1992-03-17 Sota Omoigui Audio-capnometry apparatus
US5377672A (en) * 1992-09-10 1995-01-03 Sherwood Medical Company Suction control valve
US5335655A (en) * 1992-09-10 1994-08-09 Sherwood Medical Company Suction control valve
US5360003A (en) * 1993-06-11 1994-11-01 Capistrano Cecilio L Intubation assembly and method of inserting same having a balloon to indicate the position of tube inside of the patient
US5415161A (en) * 1993-09-15 1995-05-16 Ryder; Steven L. Intermittant demand aerosol control device
US5885248A (en) * 1994-02-22 1999-03-23 Wolf Tory Medical, Inc. Intubation detection system with transducer based indicator
US5487731A (en) * 1994-02-22 1996-01-30 Wolfe Tory Medical, Inc. Esophageal intubation detector with indicator
US5591130A (en) * 1994-02-22 1997-01-07 Wolfe Troy Medical, Inc. Esophageal intubation detector with indicator
US5803078A (en) * 1994-05-06 1998-09-08 Brauner; Mark E. Methods and apparatus for intrapulmonary therapy and drug administration
US7469700B2 (en) 1994-06-17 2008-12-30 Trudell Medical Limited Nebulizing catheter system for delivering an aerosol to a patient
US7472705B2 (en) 1994-06-17 2009-01-06 Trudell Medical Limited Methods of forming a nebulizing catheter
US20040084050A1 (en) * 1994-06-17 2004-05-06 Trudell Medical Limited. Nebulizing catheter system and methods of use and manufacture
US20040084049A1 (en) * 1994-06-17 2004-05-06 Trudell Medical Limited Nebulizing catheter system and methods of use and manufacture
US6729334B1 (en) 1994-06-17 2004-05-04 Trudell Medical Limited Nebulizing catheter system and methods of use and manufacture
US6526976B1 (en) 1994-06-17 2003-03-04 Trudell Medical Limited Nebulizing catheter system and method of use and manufacture
US6070582A (en) * 1996-09-10 2000-06-06 Sherwood Services, Ag Suction control valve
US5749358A (en) * 1996-10-10 1998-05-12 Nellcor Puritan Bennett Incorporated Resuscitator bag exhaust port with CO2 indicator
US6349720B1 (en) * 1998-06-25 2002-02-26 Integrated Medical Systems, Inc. Apparatus for acoustically determining position of an endotracheal tube
US6386196B1 (en) * 2000-03-13 2002-05-14 Steven E. Culton Warning device for oxygen delivery system failure
US8062221B2 (en) 2005-09-30 2011-11-22 Nellcor Puritan Bennett Llc Sensor for tissue gas detection and technique for using the same
US20070083094A1 (en) * 2005-10-11 2007-04-12 Colburn Joel C Medical sensor and technique for using the same
US7811276B2 (en) 2005-11-10 2010-10-12 Nellcor Puritan Bennett Llc Medical sensor and technique for using the same
WO2007141787A1 (en) * 2006-06-06 2007-12-13 Sagi Giladi A device and method for assisting placement of a tube device through a body passage
US8109272B2 (en) 2006-09-25 2012-02-07 Nellcor Puritan Bennett Llc Carbon dioxide-sensing airway products and technique for using the same
US8449834B2 (en) 2006-09-25 2013-05-28 Covidien Lp Carbon dioxide detector having borosilicate substrate
US20080078394A1 (en) * 2006-09-25 2008-04-03 Rafael Ostrowski Carbon dioxide detector having borosilicate substrate
US20080081003A1 (en) * 2006-09-25 2008-04-03 Rafael Ostrowski Carbon dioxide detector having borosilicate substrate
US20080083265A1 (en) * 2006-09-25 2008-04-10 Rafael Ostrowski Carbon dioxide detector having borosilicate substrate
US8454526B2 (en) 2006-09-25 2013-06-04 Covidien Lp Carbon dioxide-sensing airway products and technique for using the same
US20080077034A1 (en) * 2006-09-25 2008-03-27 Baker Clark R Carbon dioxide-sensing airway products and technique for using the same
US8431088B2 (en) 2006-09-25 2013-04-30 Covidien Lp Carbon dioxide detector having borosilicate substrate
US20080075633A1 (en) * 2006-09-25 2008-03-27 Rafael Ostrowski Carbon dioxide detector having borosilicate substrate
US20080072905A1 (en) * 2006-09-25 2008-03-27 Baker Clark R Carbon dioxide-sensing airway products and technique for using the same
US7992561B2 (en) 2006-09-25 2011-08-09 Nellcor Puritan Bennett Llc Carbon dioxide-sensing airway products and technique for using the same
US20080077036A1 (en) * 2006-09-25 2008-03-27 Baker Clark R Carbon dioxide-sensing airway products and technique for using the same
US20080072913A1 (en) * 2006-09-25 2008-03-27 Baker Clark R Carbon dioxide-sensing airway products and technique for using the same
US8128574B2 (en) 2006-09-25 2012-03-06 Nellcor Puritan Bennett Llc Carbon dioxide-sensing airway products and technique for using the same
US8431087B2 (en) 2006-09-25 2013-04-30 Covidien Lp Carbon dioxide detector having borosilicate substrate
US8420405B2 (en) 2006-09-25 2013-04-16 Covidien Lp Carbon dioxide detector having borosilicate substrate
US8396524B2 (en) 2006-09-27 2013-03-12 Covidien Lp Medical sensor and technique for using the same
US20080076993A1 (en) * 2006-09-27 2008-03-27 Nellcor Puritan Bennett Incorporated Medical sensor and technique for using the same
US20090165801A1 (en) * 2007-12-31 2009-07-02 Nellcor Puritan Bennett Llc Carbon dioxide detector having an acrylic based substrate
US20090246797A1 (en) * 2008-03-28 2009-10-01 Nellcor Puritan Bennett Llc Medical device for the assessment of internal organ tissue and technique for using the same

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