|Publication number||US3756244 A|
|Publication date||Sep 4, 1973|
|Filing date||Jun 10, 1971|
|Priority date||Jun 10, 1971|
|Also published as||CA1005721A, CA1005721A1, DE2202984A1, DE2202984B2, DE2202984C3|
|Publication number||US 3756244 A, US 3756244A, US-A-3756244, US3756244 A, US3756244A|
|Inventors||Havstad H, Kinnear J|
|Original Assignee||Hudson Oxygen Therapy Sales Co|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (5), Referenced by (96), Classifications (8), Legal Events (5)|
|External Links: USPTO, USPTO Assignment, Espacenet|
ilnited States Patent n 1 Kinnear et al.
1451 Sept. 4, 1973 1 BREATHING AID  Inventors: John M. Kinnear, Walnut; Harold R.
Havstad, Lakewood, both of Calif.
 Assignee: Hudson Oxygen Therapy Sales Company, Temecula, Calif.
 Filed: June 10, 1971  Appl. No.: 151,780
 US. Cl 128/351, 128/208, 138/108, 138/114  Int. Cl A61m 16/00, F161 55/00, F1619/18  Field of Search 128/208, 351; l38/108,112,114
 References Cited UNITED STATES PATENTS 1,498,810 6/1924 Poe 128/208 3,057,347 10/1962 McGee 128/351 X 3,173,196 3/1965 Grimm 138/114 UX 3,306,298 2/1967 Raimo 128/351 FOREIGN PATENTS OR APPLICATIONS 789,303 7/1968 Canada 128/208 Primary ExaminerChanning L. Pace Attorney-Jerry R. Seiler  ABSTRACT An improved breathing aid device comprises an elongated arched conduit portion and a hollow neck portion extending from one end of the conduit portion and a flange portion located at the end of the neck portion opposite the conduit portion. The device includes a plurality of parallel ribs extending lengthwise within the interior of the conduit portion providing a plurality of channels for guiding a catheter inserted into the device.
7 Claims, 6 Drawing Figures PAIENTEU SE? 4 I975 sum 2 or g FIG.5
D A mA TEW m vm m R N NW N 0 m F w A Y B BREATHING AID BACKGROUND OF THE INVENTION A breathing aid device commonly referred to as an airway has been in use for some time. A particular type of airway is characterized by an elongated and generally tubular construction having an arched or curved portion and a neck portion extending from one end of the arched portion. The device is placed into a patients mouth with the arched portion lying over the tongue. When in place, the forward end of the arched portion is located in the upper pharyngeal region while the neck portion passes between the patients upper and lower teeth and lips. A flattened flange is usually also present on the end of the neck portion to prevent the device from further entering the mouth or extending deeper into the pharynx and avoid choking.
An airway is used extensively on patients to which an anesthetic has been administered such as during surgery or who are otherwise unconscious in order to maintain a direct air passage between the lips and pharynx. Since the arched portion of the device lies over the patients tongue and extends into the upper pharyngeal region the tongue is prevented from falling into the throat which would otherwise cause blockage of the pharynx and disrupt the breathing passageway. The device also finds use in resuscitation or rescue breathing. Oxygen containing gases may be administered into the airway through the forward end opening or the patient may breath himself without the aid of gases from another source by both inhaling and exhaling through the airway. In other words, the device simply maintains an air passage from the pharynx through the mouth and lips.
During surgery with an unconscious patient it is often necessary to extend a catheter into the pharyngeal region to avoid choking caused by congestion interfering with the upper respiratory tract. The catheter is extended into the congested area and is attached to a vacuum producing force for extracting the congestive material from the patients respiratory tract or trachea through the catheter. Since an airway as above described is usually also being used concurrently it is the practice to insert the catheter through the airway. Thus, the airway acts generally as a guide for the catheter as it is inserted. However, airways presently in use have an inherent disadvantage and limitations.
The problem associated with prior art airways is that as a catheter is fed into the device it tends to snake between the interior sides of the device. As this occurs, when the walls of the catheter approach both sides of the airway, the hollow interior of the airway becomes substantially blocked, occluding the air passageway. Further, if the catheter snakes as it is initially fed into the airway, the angle of its forward end passing through the airway and into the patients throat may cause it to scrape the lining of the patients throat and pharynx resulting in injury and possible bleeding.
The aforementioned disadvantages of an airway in not providing sufficient directional stability of a suction catheter during insertion and the snaking effect resulting in occlusion of the passageway is potential with all sizes of airways and catheters. Generally, the airways are sized according to the patient. For example, sizes for large adults and new borns with a range of intermediate sizes are usually available. Likewise, various catheter sizes may be obtained for use in cooperation with the airways. It will be appreciated that the smaller the catheter, usually the more flexible it is which flexibility may cause the snaking effect to be more pronounced with concomitant dangers.
SUMMARY OF THE INVENTION The airway of the present invention is designed to substantially eliminate the disadvantages of the Guedel type previously used. The airway of the invention is provided with a plurality of ribs extending along the interior length of the elongated arched conduit portion. These cooperating ribs form a plurality of channels for directing an inserted catheter and for maintaining its position within the airway during use. At the same time with the catheter so positioned, the remaining portion of the conduit is open and unobstructed. Further, the direction of the end of the catheter traveling from the airway into the patients throat and pharynx is maintained thereby substantially decreasing potential accidental injury to the patient as previously described. These and other advantages of the invention will be evident to those skilled in the art from the following detailed description.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a top plan view of the airway of the invention;
FIG. 2 is a side sectional elevation of the airway of FIG. 1 taken along line AA thereof;
FIG. 3 is a full view in perspective of the airway;
FIG. 4 is an elevational view of the forward opening of the airway;
FIG. 5 is a view in perspective showing a suction catheter inserted in the airway; and.
FIG. 6 is a perspective view of a bite insert used with the airway of the invention.
DETAILED DESCRIPTION OF THE INVENTION Referring to FIGS. 1-3 the airway 10 comprises an elongated arched conduit portion 12 having a forward opening 18. A hollow neck portion 14 is connected to the end of the arched conduit portion 12 and extends rearwardly therefrom. A flange portion 16 is located on the end of the neck portion 14. The flange portion 16 is flattened with the plane of its flattened surfaces being substantially perpendicular to the common axes of the neck and conduit portions 14 and 12 respectively. The hollow neck portion 14 provides a passageway 52 terminating at the exterior end 28 of the device with the passageway 52 also communicating with the cavity 30 of the conduit portion 12.
The conduit portion 12 is arched along both its upper surface 20 and lower surface 22 so that it generally conforms to the arch of a patients tongue and upper pharyngeal region.
As also shown in FIG. 4, the conduit portion 12 of the airway is provided with a plurality of ribs, 24, 25, 26 and 27 which extend along the interior length of the conduit portion 12. Upper ribs 26 and 27 extend along the upper interior conduit surface while lower ribs 24 and 25 extend along the lower interior surface of the arched conduit portion 12. It will be noted that each upper rib is disposed substantially opposite a lower rib and cooperating with conduit sides 45 and 47 to form channels 42, 44 and 46 extending along the length of the arched conduit portion 12.
Noting particularly FIG. 1 and 4, channels 46 and 42 extend along the sides of the conduit portion bounded by the respective interior side of the conduit portion 12 and the sides of the respective ribs. A third channel 44 is centrally located bounded generally by the sides of the four cooperating ribs as shown.
The cross-section shape of the conduit portion 12 and the neck portion 14 is generally elliptical with the upper and lower conduit surfaces 20 and 22 and neck surfaces 13 and respectively being somewhat flattened. Accordingly, the cross section shape of the neck portion 14 and arched conduit portion 12 including the rear and forward airway openings 28 and 18 will be a modified or somewhat flattened elliptical shape which may be referred to as a prolonged or an elongated spheroid.
The preferred device incorporates the two pairs of upper and lower ribs as shown in FIG. 4. Thus, the device as shown incorporates a cavity 30 through the arched portion 12 into which cavity the ribs extend to form the three channels 42, 44 and 46 as shown. However, different number of opposing ribs may be used, for example, one upper rib and one lower rib substantially opposed so as to create two channels, one being on each side of the upper and lower ribs. Similarly, three or more ribs, upper and lower could be used if more channels are desired.
As previously noted, the ribs cooperate to form the channels along the arched conduit portion 12 of the airway which channels act as a guide for a catheter inserted into the airway. Referring to FIG. 5 there is illustrated a catheter 32 extending through the airway 10. It will be noted that the catheter 32 extends along the center channel 44 which is defined by the cooperating ribs. Thus, even though the catheter 32 fills a large portion of that channel 44, the two channels 42 and 46 remain open and unobstructed thus assuring a sufficient passageway for air to and from the patients lungs.
It will be noted that opposing ribs, i.e., ribs 24 and 26 extend substantially intothe cavity 30 of the conduit section 12. The projection of these opposing ribs toward one another is only critical in that they should protrude far enough so as to prevent a rather small catheter from slipping between them in which the catheter would be located in two or more of the channels defeating an object of the invention. The opposite ribs could even contact or be formed as a single rib which would thus act as a separator or divider for the channels.
As shown the ribs do not extend into the neck of the airway. That feature is desirable since a bite block such as shown in FIG. 6 is desirably used with the airway as will be more fully explained hereinafter.
The specific shape of the conduit portion 12 is not extremely critical but as previously pointed out should generally conform to the shape of the arched tongue and downwardly directed passageway from the back of the patients mouth into the esophagus and upper pharyngeal region. It is especially desirable that the forward edge 18 of the airway be rounded to avoid any sharp edges which may injure a patient when the airway is inserted. In addition the device is preferrably made of a soft and rather flexible plastic such as a polyvinyl chloride or polyvinyl acetate. Although materials such as polyethylene and polypropylene could be substituted such plastics are usually somewhat harder and thus do not offer as much patient comfort as the softer and more flexible materials. However, these materials are by way of example only and the device is not limited to specific plastics except by way of preferred relative softness.
FIG. 6 illustrates a bite insert 36 preferably used in cooperation with the airway previously described. The bite insert 36 comprises an elongated hollow conduit provided with upper and lower opposed ribs 33, 34, 37 and 38 projecting inwardly as shown. In using the bite insert 36 with the airway, it is inserted into the passageway 52 of the hollow neck portion 14 of the airway 10. Since the preferable airway composition is rather soft unless it is someway enforced, a patient may bite down on the neck portion 14 causing occlusion of the passageway 52 and suction catheter. This undesirable feature is obviated by using the bite insert 36 made of a rather hard material such as rigid polyethylene, nylon or similar material. The outer surface of the bite block is shaped so that it will nest snugly within the interior of the hollow neck portion and provide reinforcement around its surface area.
The interior of the bite insert 36 is provided with the ribs extending along a portion of the length of the upper and lower interior surface. The ribs are formed so as to be aligned with the ribs of the conduit portion of the airway to provide continuous channels through the bite insert and airway for guiding an inserted catheter. It is preferable to have the ribs extending from only one end of the bite insert and approximately one-half of the length of the conduit which leaves the other conduit half unencumbered. This feature is desirable in order to allow for insertion of an airway connecting device into the portion of the bite insert conduit or tube which portion does not incorporate the ribs.
These as well as other advantages of the invention described herein will be evident to those skilled in the art.
1. In a breathing aid device for insertion into the mouth and pharynx having an elongated tubular hollow body open at each end and which body has a straight portion for extending through thelips and mouth and an arched portion for extending over the tongue and into the pharynx, said hollow body having opposed generally flat walls constituting a top and a bottom and a transversely extending flange attached to the end of the straight body portion, the improvement comprising at least one pair of ribs one member of each pair being disposed opposite the other member of said pair and extending longitudinally from each flat wall toward the other wall along at least a portion of the interior length of the tubular body and defining an elongated interior channel for guiding a tubular catheter therealong whereby a catheter inserted into said device extends along said channel leaving the remainder of the interior of the hollow body unobstructed.
2. The device of claim 1 having two pairs of said ribs.
3. The device of claim 1 wherein said ribs extends substantially along the length of the arched portion.
4. In combination the device of claim 3 and an elongated hollow reinforcing member inserted in the straight portion and having an outer surface in substantial abuttment with the interior surface of the straight portion.
5. The device of claim 2 wherein the interior of the hollow reinforcing member includes at least one pair of ribs substantially aligned with the ribs of the arched portion and which ribs extend along a portion of the reinforcing member interior.
6. The device of claim 1 comprising a relatively soft, pliable plastic material.
7. The device of claim 1 wherein the plastic is polyvinyl chloride.
* I i I I!
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US1498810 *||Nov 7, 1921||Jun 24, 1924||Poe James G||Throat tube|
|US3057347 *||Dec 3, 1959||Oct 9, 1962||Prescription Drug Co Inc||Rescue breathing device|
|US3173196 *||Nov 2, 1959||Mar 16, 1965||Fromson H A||Method of producing a double-walled tube with one of the tubes having integral therewith projecting fin means radially separating the tubes|
|US3306298 *||Mar 31, 1964||Feb 28, 1967||Raimo Victor H||Airway|
|CA789303A *||Jul 9, 1968||Vantorex Ltd||Aerosol dispensing apparatus|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3908665 *||May 20, 1974||Sep 30, 1975||Moses John A||Oro-pharyngeal airway|
|US3948273 *||Sep 13, 1974||Apr 6, 1976||Medical Engineering Corporation||Endotracheal tube having a non-sticking inner surface|
|US4068658 *||Mar 15, 1977||Jan 17, 1978||Berman Robert A||Intubating pharyngeal airway|
|US4198970 *||Sep 11, 1978||Apr 22, 1980||Raymond Luomanen||Airway for drainage of the nasopharynx|
|US4223671 *||Mar 26, 1979||Sep 23, 1980||Rudolph Muto||Endotracheal tube stabilizer|
|US4270529 *||Aug 13, 1979||Jun 2, 1981||Rudolph Muto||Endotracheal tube stabilizer|
|US4553540 *||Aug 16, 1983||Nov 19, 1985||Straith Richard E||Airway|
|US4681094 *||Nov 27, 1985||Jul 21, 1987||American Medical And Emergency Research Corporation||Balloon laryngoscope|
|US4848331 *||Nov 14, 1986||Jul 18, 1989||Northway Meyer Robert||Apparatus and method for pulmonary ventilation of a patient concurrent with fiberoptic respiratory tract examination and tracheal intubation|
|US4877024 *||Jan 18, 1985||Oct 31, 1989||P K Airway Limited||Airway|
|US5024218 *||Oct 27, 1988||Jun 18, 1991||The Kendall Company||Intubating airway|
|US5027864 *||Nov 3, 1989||Jul 2, 1991||Arnco Corporation||Tubular apparatus for transmission cable|
|US5038766 *||Nov 8, 1989||Aug 13, 1991||Parker Jeffrey D||Blind orolaryngeal and oroesophageal guiding and aiming device|
|US5060647 *||Feb 23, 1989||Oct 29, 1991||Alessi David M||Endotrachael tube|
|US5087153 *||Aug 23, 1989||Feb 11, 1992||Arnco Corporation||Internally spiraled duct and method of installation|
|US5174283 *||May 7, 1992||Dec 29, 1992||Parker Jeffrey D||Blind orolaryngeal and oroesophageal guiding and aiming device|
|US5273032 *||Nov 27, 1990||Dec 28, 1993||Gastro Services Pty Ltd.||Oxygenating oral medical appliance|
|US5277178 *||Sep 1, 1992||Jan 11, 1994||John Dingley||Medico-surgical device|
|US5318017 *||Nov 5, 1992||Jun 7, 1994||Ellison Lee H||Guide for transesophageal echo probe|
|US5339805 *||Dec 23, 1992||Aug 23, 1994||Parker Jeffrey D||Blind orolaryngeal and oroesophageal guiding and aiming device|
|US5413095 *||Apr 15, 1994||May 9, 1995||Arrow Precision Products, Inc.||Mouthpiece with oxygen receiving and directing structure|
|US5433252 *||Feb 23, 1993||Jul 18, 1995||Woco Franz-Josef Wolf & Co.||Fluid containing coaxial tube for control systems|
|US5682925 *||Jul 23, 1996||Nov 4, 1997||Plastic Specialties And Technologies Inc.||Kink resistant hose for spraying water|
|US5743254 *||Mar 31, 1997||Apr 28, 1998||Parker Medical Limited Partnership||Orotracheal intubation guide|
|US6116284 *||Aug 6, 1999||Sep 12, 2000||Case Corporation||Guide structure for pneumatic applicator|
|US6196224||Sep 30, 1998||Mar 6, 2001||David D. Alfery||Perilaryngeal oral airway|
|US6386199||Sep 29, 1999||May 14, 2002||David D. Alfery||Perilaryngeal oral airway|
|US6474332||Oct 1, 1998||Nov 5, 2002||Wisconsin Medical Incorporated||Bite block|
|US6672305||Feb 26, 2001||Jan 6, 2004||Parker Medical Limited Partnership||Shallow throat orotracheal intubation guide|
|US6729325||May 14, 2002||May 4, 2004||David D. Alfery||Perilaryngeal oral airway|
|US6983744||Apr 5, 2004||Jan 10, 2006||Alfery David D||Perilaryngeal oral airway with temperature sensor|
|US7007691||Sep 23, 2003||Mar 7, 2006||Roger Daugherty||Apparatus and method for humidification of inspired gases|
|US7013899||Aug 13, 2004||Mar 21, 2006||Engineered Medical System, Inc.||Perilaryngeal oral airway with multi-lumen esophogeal-obturator|
|US7036501||Nov 20, 2003||May 2, 2006||Wall W Henry||Oro-pharyngeal airway with breath monitor|
|US7040312||May 16, 2002||May 9, 2006||Engineered Medical Systems, Inc.||Perilaryngeal oral airway with flexible tip guide|
|US7278420 *||Sep 19, 2003||Oct 9, 2007||Thomas Jefferson University||Oropharyngeal airway|
|US7302950 *||Mar 12, 2003||Dec 4, 2007||Resmed Limited||Patient interface for respiratory apparatus|
|US7866313||Jun 22, 2007||Jan 11, 2011||Isen Innovations, Llc||Oral airways that facilitate tracheal intubation|
|US7866314||Dec 29, 2007||Jan 11, 2011||Isen Innovations, Llc||Method of tracheal intubation|
|US7913687||Oct 23, 2006||Mar 29, 2011||Munn Myron L||Oral airway|
|US7931023||Jan 29, 2007||Apr 26, 2011||Resmed Limited||Patient interface assembly for CPAP respiratory apparatus|
|US7946288||Nov 10, 2006||May 24, 2011||Encompas Unlimited, Inc.||Bite block system and method|
|US7946289||Oct 23, 2006||May 24, 2011||Munn Myron L||Oral airway|
|US7954488 *||Jul 17, 2007||Jun 7, 2011||Munn Myron L||Oral airway|
|US7975695||Jan 31, 2008||Jul 12, 2011||Myron Munn||Oral airway|
|US8028704 *||Jun 3, 2008||Oct 4, 2011||Ethicon Endo-Surgery, Inc.||Endoscopic bite block for use with cannula|
|US8220461||Jun 25, 2011||Jul 17, 2012||Guerra Phillip B||Oral airway|
|US8413658 *||Jun 2, 2008||Apr 9, 2013||Andrea R. Williams||Oral airway for endoscopic and intubating procedures|
|US8485194||Jul 17, 2012||Jul 16, 2013||Phillip Benjamin Guerra||Oral airway|
|US8640692||Jan 26, 2010||Feb 4, 2014||Adrian A. Matioc||Oropharyngeal device for assisting oral ventilation of a patient|
|US8820320||Nov 23, 2009||Sep 2, 2014||Creighton University||Bite blocks|
|US8973573||Jun 29, 2010||Mar 10, 2015||Creighton University||Bite block with airway mount|
|US8978648||Apr 7, 2011||Mar 17, 2015||Resmed Limited||Air delivery conduit|
|US9271631||Mar 13, 2012||Mar 1, 2016||Stephen A. Leeflang||Oral airway devices and methods for making and using them|
|US20030154980 *||Mar 12, 2003||Aug 21, 2003||Michael Berthon-Jones||Patient interface for respiratory apparatus|
|US20030188746 *||May 13, 2003||Oct 9, 2003||Roger Daugherty||Apparatus and method for humidification of inspired gases|
|US20030192549 *||Sep 9, 2002||Oct 16, 2003||Georges Boussignac||Device for suppressing snoring|
|US20030213492 *||May 16, 2002||Nov 20, 2003||Alfery David D.||Perilaryngeal oral airway with flexible tip guide|
|US20040102711 *||Nov 20, 2003||May 27, 2004||Wall W. Henry||Oro-pharyngeal airway with breath monitor|
|US20040129272 *||Sep 19, 2003||Jul 8, 2004||Thomas Jefferson University||Oropharyngeal airway|
|US20040182384 *||Apr 5, 2004||Sep 23, 2004||Alfery David D.||Perilaryngeal oral airway with temperature sensor|
|US20040226559 *||Sep 23, 2003||Nov 18, 2004||Roger Daugherty||Apparatus and method for humidification of inspired gases|
|US20040231675 *||May 20, 2003||Nov 25, 2004||Lyons James R.||Method and apparatus for transnasal ventilation|
|US20050178381 *||Jan 21, 2005||Aug 18, 2005||Roger Daugherty||Apparatus and method for humidification of inspired gases|
|US20060032505 *||Aug 13, 2004||Feb 16, 2006||Engineered Medical Systems, Inc.||Perilaryngeal oral airway with multi-lumen esophogeal-obturator|
|US20060037609 *||Oct 25, 2005||Feb 23, 2006||Roger Daugherty||Apparatus and method for humidification of inspired gases|
|US20060037610 *||Oct 25, 2005||Feb 23, 2006||Roger Daugherty||Apparatus and method for humidification of inspired gases|
|US20060081241 *||Sep 15, 2004||Apr 20, 2006||Quinn George E||Small disposable medical device|
|US20070190274 *||Apr 23, 2007||Aug 16, 2007||Kabushiki Kaisha Kobe Seiko Sho(Kobe Steel, Ltd.)||Glass-like carbon deformed molded article, process for producing the same, and joint structure for jointing a connecting member to a glass-like carbon hollow molded article|
|US20080000481 *||Jul 10, 2007||Jan 3, 2008||Arjunan Ganesh||Oropharyngeal Airway|
|US20080092882 *||Oct 23, 2006||Apr 24, 2008||Munn Myron L||Oral airway|
|US20080092900 *||Jul 17, 2007||Apr 24, 2008||Munn Myron L||Oral airway|
|US20080110456 *||Nov 10, 2006||May 15, 2008||Encompas Unlimited, Inc.||Bite block system and method|
|US20080121229 *||Jan 31, 2008||May 29, 2008||Myron Munn||Oral airway|
|US20080156322 *||Jun 22, 2007||Jul 3, 2008||Amy Isenberg||Oral airways that facilitate tracheal intubation|
|US20080156324 *||Dec 29, 2007||Jul 3, 2008||Isen Innovations, Llc||Scented and flavored oral airways|
|US20080156331 *||Dec 29, 2007||Jul 3, 2008||Isen Innovations, Llc||Method of tracheal intubation|
|US20080185004 *||Oct 23, 2006||Aug 7, 2008||Munn Myron L||Oral airway|
|US20080295849 *||Jun 3, 2008||Dec 4, 2008||Reynolds Ii Donald L||Endoscopic bite block for use with cannula|
|US20090013995 *||Jun 2, 2008||Jan 15, 2009||Williams Andrea R||Oral airway for endoscopic and intubating procedures|
|US20090315323 *||May 13, 2008||Dec 24, 2009||Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel Ltd.)||Glass-like carbon deformed molded article, process for producing the same, and joint structure for jointing a connecting member to a glass-like carbon hollow molded article|
|US20100132700 *||Nov 23, 2009||Jun 3, 2010||Filipi Charles J||Bite blocks|
|US20100199998 *||Jan 26, 2010||Aug 12, 2010||Matioc Adrian A||Oropharyngeal Device for Assisting Oral Ventilation of a Patient|
|US20100326435 *||Jun 29, 2010||Dec 30, 2010||Filipi Charles J||Bite block with airway mount|
|USRE39508 *||Aug 23, 1996||Mar 13, 2007||Parker Medical||Blind orolaryngeal and oroesophageal guiding and aiming device|
|DE3135570A1 *||Sep 8, 1981||Aug 12, 1982||Robert Tudor Williams||Mundrachen-luftweganordnung|
|EP0490852A1 *||Dec 3, 1991||Jun 17, 1992||Medical Products Octagon Ab||Tracheal tube|
|EP0533371A2 *||Sep 1, 1992||Mar 24, 1993||John Dingley||Introducer for trachealtube|
|EP0533371A3 *||Sep 1, 1992||May 26, 1993||John Dingley||Introducer for trachealtube|
|EP1043039A3 *||Apr 4, 2000||Sep 12, 2001||Hsiu-Chin Chou||Adjustable oropharyngeal airway apparatus|
|EP2481436A1||Aug 10, 2011||Aug 1, 2012||Philip B. Guerra||Oral airway|
|WO1980000538A1 *||Sep 11, 1979||Apr 3, 1980||R Luomanen||Airway for drainage of the nasopharynx|
|WO2004103165A2 *||May 20, 2004||Dec 2, 2004||Pog Llc||Method and apparatus for transnasal ventilation|
|WO2004103165A3 *||May 20, 2004||May 26, 2006||Pog Llc||Method and apparatus for transnasal ventilation|
|WO2007048884A1 *||Oct 27, 2005||May 3, 2007||Christophe Bastid||Medical tongue depressor comprising one or several channels enabling an oxygen supply and other functions|
|WO2014144656A1 *||Mar 14, 2014||Sep 18, 2014||Hollister Corporation||Endotracheal tube holding device with bite block|
|U.S. Classification||128/207.14, 138/108, 138/114|
|Cooperative Classification||A61M2016/0493, A61M16/0488, A61M2016/0495|
|Jun 8, 1993||AS||Assignment|
Owner name: CREDITANSTALT-BANKVEREIN, CALIFORNIA
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HUDSON RESPIRATORY CARE INC.;REEL/FRAME:006570/0759
Effective date: 19920914
|Jun 8, 1993||AS02||Assignment of assignor's interest|
Owner name: CREDITANSTALT-BANKVEREIN SUITE 1630 FOUR EMBARCADE
Owner name: HUDSON RESPIRATORY CARE INC.
Effective date: 19920914
|May 9, 1990||AS||Assignment|
Owner name: HOMEFED BANK, F.S.B.
Free format text: SECURITY INTEREST;ASSIGNOR:HUDSON RESPIRATORY CARE INC.;REEL/FRAME:005300/0204
Effective date: 19900509
|May 9, 1990||AS06||Security interest|
Owner name: HOMEFED BANK, F.S.B.
Owner name: HUDSON RESPIRATORY CARE INC.
Effective date: 19900509
|Mar 28, 1990||AS||Assignment|
Owner name: FIRST INTERSTATE BANK OF CALIFORNIA
Free format text: SECURITY INTEREST;ASSIGNOR:HUDSON RESPIRATORY CARE, INC.;REEL/FRAME:005302/0948
Effective date: 19900209