US2904033A - Breathing indicator - Google Patents

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US2904033A
US2904033A US643829A US64382957A US2904033A US 2904033 A US2904033 A US 2904033A US 643829 A US643829 A US 643829A US 64382957 A US64382957 A US 64382957A US 2904033 A US2904033 A US 2904033A
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breathing
unit
patient
passage
air
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US643829A
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Sylvan M Shane
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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
    • A61M16/0051Devices 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
    • A61M16/021Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes operated by electrical means

Definitions

  • I 2 Claims. c1. 128-2) This invention relates to breathing indicators and it is more particularly concerned with a device for use in an operating room in conjunction with the administration of anesthetics to indicate the breathing response of a patient undergoing surgery or other treatment.
  • breathing characteristics of a patient undergoing surgery or otherv medical treatments is of importance to the surgeon and/ or other members of a team administering to the patient. Certain breathing characteristics, for example, may indicate the requirement for collateral treatment or modifications of treatments being administered.
  • one of the objects of this invention is the provision of a device 'Which is highly sensitive to the breathing of a human and in which the breathing action can be interpreted either as a magnified sound from a loudspeaker or as a visual image on an oscilloscope, or by means of some other signaling device.
  • Another object of the invention is the provision of such a device which can be quickly attached to and be detached from conventional respiratory anesthesia equipment for use as needed.
  • a further object of the invention is the provision of such a device which can be sterilized and cleaned after each use to avoid transmission of contagious diseases among patients through the respiratory system, such as tuberculosis.
  • a still further object of the invention is the provision of such a device which does not interfere with or in any way obstruct or restrict a patients breathing efforts and constitutes no breathing hazard to persons subjected to its use.
  • a still further object of the invention is the provision of such a device which does not contact the patient and hence does not interfere with any operations being performed.
  • Fig. 1 is a side elevational view of a portion of a respiratory anesthesia machine showing a front elevational view of an embodiment of the invention connected thereto and partly in section.
  • Fig. 2 is a side elevational view of the embodiment apart from the anesthesia machine, partly in section.
  • Fig. 3 is a rear elevational View of the embodiment.
  • Fig. 4 is a top plan view of the embodiment.
  • a tubular member 11 of any suitable material but preferably metal, such as brass, aluminum, copper, or metal alloys.
  • the tube 11 has three open branches 12, 13, and 14.
  • One of these branches, say branch 14, is provided with a removable plug 15 of an electrical insulating material, such as cork, rubber or glass.
  • the plug 15 fits tightly without leakage of air and on it there is mounted a highly sensitive electronic microphone 16 or other suitable device sensitive to velocity changes of respiration air passing through the member 11 between the other two branches 12 and 13.
  • a highly sensitive electronic microphone 16 or other suitable device sensitive to velocity changes of respiration air passing through the member 11 between the other two branches 12 and 13.
  • any of the conventional pick-up microphones of electronic hearing aids that are in general use have the high degree of sensitivity needed for this purpose and are, therefore, suitable for use as the detecting member.
  • the microphone 16 should be so mounted as to project partway into the passage between the branches 12 and 13, so as to receive and be subjected to the effect of velocity changes of air gusts or surges therein caused by the respiration of the patient.
  • the microphone 16 is connected by electric wires 17 to a combined electronic amplifier and power pack unit '18 which in turn is electrically connected by wires 18A to a signaling device, such as a miniature loudspeaker 19.
  • a signaling device such as a miniature loudspeaker 19.
  • the earphones of any of the conventional electronic hearing aids in general use have been found to function satisfactorily.
  • the cup 20 may be secured directly to the tube 11, as shown, for convenience, or it may be located at any other place desired.
  • the tube branch 14 is also pro- Vided with a removable cap '21 which fits over the end and is provided with a slot 22 or other opening for the wire 17.
  • the tube 11 is also provided with a mounting plate 23 which is firmly attached thereto by soldering, welding or otherwise.
  • a pair of resilient cantilever clips 24 and '25 of the fountain pen type are secured to the top of the casing 26 of the combined unit 18 and the plate 23 is slidably engaged between the clips and the casing, as shown, to removably connect the unit to the tube.
  • the mounting plate 23 is provided with a skirt flange 27 on three sides which holds the two parts together against lateral slippage.
  • the tube branches 12 and 13 are adapted to be mounted in any passage where respiration air passes.
  • the branches 12 and 13 may be interposed at any point in series with this air hose.
  • the air hose is usually connected to the anesthesia machine by a nipple 30.
  • a convenient method of connecting the device into the system is to remove the hose 29 from the nipple 30, connect one of the branches 1 2 or 13, say the branch 12, directly or through an adapter 31 to the nipple 30, and then connect the other branch 13 directly or through another adapter 32 to the hose 29.
  • Anesthesia machines also usually have a return hose (not shown) from the face mask to carry exhaust or expiration air to the apparatus for reconditioning and recycling as an alternate to exhausting it directly to the atmosphere.
  • the device of the present invention may be connected into this return line hose as well as into the hose used as a feed line.
  • the invention is not limited to the use of audio signaling means, but may, where it is desired, be replaced by or augmented by a video signalling means, such as an-oscilloscope or oscillograph (not shown).
  • anesthesia machine having a passage through which respiration air being inhaled by a patient normally flows and a breathing indicator device, said devicecomprising a tubular unit removably inserted in said passage, said unit comprising. a wall having an opening therethrough, a microphonic detector unit highly sensitive to velocity changes of air removably secured in said opening, said tubular unit and microph'onic detector unit being structurally capable of sterilization as units and forming a complete noise barrier between the interior andexterior of the passage when the tubular unit is inserted in the passage, said-microphonic detector unit being connected to an electric amplifier unit, said amplifier unit, in turn, being connected to an audible output signal device, said detector unit, amplifier and signal device being.
  • said device comprising a tubular unit adapted for insertion in said passage, said unit comprising a wall having an opening therethrough, a highly sensitive microphonic detector unit sensitive to velocity changes of air removably secured in said opening, said tubular unit and microphonic detector unit being structurally capable of sterilization as units and forming a complete noise barrier between" the interior and exterior of the passage when the tubular unit is" inserted in the passage, said microphonic detector unit being connected to an electric amplifier unit, said amplifier unit, in turn, being connected to an audible output signal device, said detector unit, amplifier and signal device being so designed as to constitute the indicator device as a whole highly sensitive to velocity changes of respiration air passing through the tubular unit, whereby signals indicating even slight variations of breathing of a patient, but free of environmental noise, are made constantly available in the audible form and whereby saidtubular unit and detector unit may be readily removed for. sterilization.

Description

p 15, 1959 s. M. SHANE 2,904,033
BREATHING INDICATOR Filed March 4, 195'! INVENTOR. SYLVAN M. SHANE ATTORNEY United States Patent BREATHING INDICATOR Sylvan M. Shane, Baltimore, Md.
Application March 4, 1957, Serial No. 643,829
I 2 Claims. c1. 128-2) .This invention relates to breathing indicators and it is more particularly concerned with a device for use in an operating room in conjunction with the administration of anesthetics to indicate the breathing response of a patient undergoing surgery or other treatment.
The breathing characteristics of a patient undergoing surgery or otherv medical treatments is of importance to the surgeon and/ or other members of a team administering to the patient. Certain breathing characteristics, for example, may indicate the requirement for collateral treatment or modifications of treatments being administered.
The breathing of a patient, however, is usually inaudible', or audible only to a limited degree. Also, a diversion ofjthe'" attention of the surgeon or other member of a clinical teamrto visually observe the breathing response of the patient, cannot always be afforded or may be dangerous. Moreover, such visual observations lack sensitivity to a degree that makes it diflicult to interpret readily the true respiratory condition of the patient.
Accordingly, one of the objects of this invention is the provision of a device 'Which is highly sensitive to the breathing of a human and in which the breathing action can be interpreted either as a magnified sound from a loudspeaker or as a visual image on an oscilloscope, or by means of some other signaling device.
Another object of the invention is the provision of such a device which can be quickly attached to and be detached from conventional respiratory anesthesia equipment for use as needed.
A further object of the invention is the provision of such a device which can be sterilized and cleaned after each use to avoid transmission of contagious diseases among patients through the respiratory system, such as tuberculosis.
A still further object of the invention is the provision of such a device which does not interfere with or in any way obstruct or restrict a patients breathing efforts and constitutes no breathing hazard to persons subjected to its use.
A still further object of the invention is the provision of such a device which does not contact the patient and hence does not interfere with any operations being performed.
These and other objects, advantages, and features of the invention will appear more fully from the following description, considered together with the accompanying drawing.
In the drawing:
Fig. 1 is a side elevational view of a portion of a respiratory anesthesia machine showing a front elevational view of an embodiment of the invention connected thereto and partly in section.
Fig. 2 is a side elevational view of the embodiment apart from the anesthesia machine, partly in section.
Fig. 3 is a rear elevational View of the embodiment.
Fig. 4 is a top plan view of the embodiment.
Referring with more particularity to the drawing in which like numerals designate like parts, the embodiment illustrated comprises: a tubular member 11 of any suitable material, but preferably metal, such as brass, aluminum, copper, or metal alloys.
The tube 11 has three open branches 12, 13, and 14. One of these branches, say branch 14, is provided with a removable plug 15 of an electrical insulating material, such as cork, rubber or glass. The plug 15 fits tightly without leakage of air and on it there is mounted a highly sensitive electronic microphone 16 or other suitable device sensitive to velocity changes of respiration air passing through the member 11 between the other two branches 12 and 13. For this purpose, it has been found that any of the conventional pick-up microphones of electronic hearing aids that are in general use have the high degree of sensitivity needed for this purpose and are, therefore, suitable for use as the detecting member.
The microphone 16 should be so mounted as to project partway into the passage between the branches 12 and 13, so as to receive and be subjected to the effect of velocity changes of air gusts or surges therein caused by the respiration of the patient.
The microphone 16 is connected by electric wires 17 to a combined electronic amplifier and power pack unit '18 which in turn is electrically connected by wires 18A to a signaling device, such as a miniature loudspeaker 19. For this purpose, the earphones of any of the conventional electronic hearing aids in general use have been found to function satisfactorily. When such a miniature device is used, his preferably mounted at the narrower closed end of a frustro-conical cup 20 which acts as a megaphone to further amplify the sounds, making it possible for them to be heard at remote distances, and clearly heard within the confines of even the largest of operating rooms.
The cup 20 may be secured directly to the tube 11, as shown, for convenience, or it may be located at any other place desired. The tube branch 14 is also pro- Vided with a removable cap '21 which fits over the end and is provided with a slot 22 or other opening for the wire 17.
The tube 11 is also provided with a mounting plate 23 which is firmly attached thereto by soldering, welding or otherwise. A pair of resilient cantilever clips 24 and '25 of the fountain pen type, are secured to the top of the casing 26 of the combined unit 18 and the plate 23 is slidably engaged between the clips and the casing, as shown, to removably connect the unit to the tube. The mounting plate 23 is provided with a skirt flange 27 on three sides which holds the two parts together against lateral slippage.
The tube branches 12 and 13 are adapted to be mounted in any passage where respiration air passes. For example, in the case of an anesthesia machine 28, having at least one air hose '29 connected to the face mask (not shown), the branches 12 and 13 may be interposed at any point in series with this air hose. The air hose is usually connected to the anesthesia machine by a nipple 30. Thus a convenient method of connecting the device into the system is to remove the hose 29 from the nipple 30, connect one of the branches 1 2 or 13, say the branch 12, directly or through an adapter 31 to the nipple 30, and then connect the other branch 13 directly or through another adapter 32 to the hose 29.
Anesthesia machines also usually have a return hose (not shown) from the face mask to carry exhaust or expiration air to the apparatus for reconditioning and recycling as an alternate to exhausting it directly to the atmosphere. When such recycling is used, the device of the present invention may be connected into this return line hose as well as into the hose used as a feed line.
It is also to be understood that the invention is not limited to the use of audio signaling means, but may, where it is desired, be replaced by or augmented by a video signalling means, such as an-oscilloscope or oscillograph (not shown).
Having thus described my invention, I claim:
1. The'comb'ination of an anesthesia machine having a passage through which respiration air being inhaled by a patient normally flows and a breathing indicator device, said devicecomprising a tubular unit removably inserted in said passage, said unit comprising. a wall having an opening therethrough, a microphonic detector unit highly sensitive to velocity changes of air removably secured in said opening, said tubular unit and microph'onic detector unit being structurally capable of sterilization as units and forming a complete noise barrier between the interior andexterior of the passage when the tubular unit is inserted in the passage, said-microphonic detector unit being connected to an electric amplifier unit, said amplifier unit, in turn, being connected to an audible output signal device, said detector unit, amplifier and signal device being. so designed as to constitute the indicator device as a Whole highly sensitive normally flows, said device comprising a tubular unit adapted for insertion in said passage, said unit comprising a wall having an opening therethrough, a highly sensitive microphonic detector unit sensitive to velocity changes of air removably secured in said opening, said tubular unit and microphonic detector unit being structurally capable of sterilization as units and forming a complete noise barrier between" the interior and exterior of the passage when the tubular unit is" inserted in the passage, said microphonic detector unit being connected to an electric amplifier unit, said amplifier unit, in turn, being connected to an audible output signal device, said detector unit, amplifier and signal device being so designed as to constitute the indicator device as a whole highly sensitive to velocity changes of respiration air passing through the tubular unit, whereby signals indicating even slight variations of breathing of a patient, but free of environmental noise, are made constantly available in the audible form and whereby saidtubular unit and detector unit may be readily removed for. sterilization.
References Cited in the file of thisv patent UNITED STATES PATENTS 820,259 Renvoize May8, 1906 2,153,254 Iohnston et al Apr. 4, 1939 2,210,417 Kinley Aug. 6, 1940" 2,376,971 Kleit May 29, 1945 2,431,328 Hull Nov. 25, 1947' 2,596,152 Johnson May 13', 1952 2,757,533 Wiley Aug. 7, 1956 2,760,184 Beattie Aug. 21, 1956' 2,807,012 Schwartz Sept. 17, 1957'
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Cited By (40)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4475559A (en) * 1981-10-09 1984-10-09 Mary Horn Apparatus and method for detecting apnea
US4543951A (en) * 1982-11-30 1985-10-01 Senko Medical Instrument Mfg. Co., Ltd. Respirator with two jet gas injection tubes
US4691701A (en) * 1986-07-28 1987-09-08 Tudor Williams R Carbon dioxide detector
US4830022A (en) * 1987-07-27 1989-05-16 Medical Engineering And Development, Inc. Animal monitoring system
US4832015A (en) * 1988-05-19 1989-05-23 Trudell Medical Pediatric asthmatic inhaler
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
US5134996A (en) * 1991-01-09 1992-08-04 Smiths Industries Medical Systems, Inc. Inspiration and expiration indicator for a suction catheter
US5749358A (en) * 1996-10-10 1998-05-12 Nellcor Puritan Bennett Incorporated Resuscitator bag exhaust port with CO2 indicator
US5836302A (en) * 1996-10-10 1998-11-17 Ohmeda Inc. Breath monitor with audible signal correlated to incremental pressure change
US6029665A (en) * 1993-11-05 2000-02-29 Resmed Limited Determination of patency of airway
US6029660A (en) * 1996-12-12 2000-02-29 Resmed Limited Substance delivery apparatus
US6091973A (en) * 1995-04-11 2000-07-18 Resmed Limited Monitoring the occurrence of apneic and hypopneic arousals
US6152129A (en) * 1996-08-14 2000-11-28 Resmed Limited Determination of leak and respiratory airflow
US6155986A (en) * 1995-06-08 2000-12-05 Resmed Limited Monitoring of oro-nasal respiration
US6182657B1 (en) 1995-09-18 2001-02-06 Resmed Limited Pressure control in CPAP treatment or assisted respiration
US6192876B1 (en) * 1997-12-12 2001-02-27 Astra Aktiebolag Inhalation apparatus and method
US6202646B1 (en) 1998-12-23 2001-03-20 Para Products Incorporated Detection device for verifying the proper intubation of an endotracheal tube
US6213119B1 (en) 1995-10-23 2001-04-10 Resmed Limited Inspiratory duration in CPAP or assisted respiration treatment
US6237592B1 (en) 1995-07-03 2001-05-29 Resmed Limited Auto-calibration of pressure transducer offset
US6253764B1 (en) 1996-05-08 2001-07-03 Resmed, Ltd. Control of delivery pressure in CPAP treatment or assisted respiration
US6332463B1 (en) 1995-09-15 2001-12-25 Resmed Limited Flow estimation and compensation of flow-induced pressure swings in CPAP treatment and assisted respiration
US6349720B1 (en) * 1998-06-25 2002-02-26 Integrated Medical Systems, Inc. Apparatus for acoustically determining position of an endotracheal tube
US6367474B1 (en) 1997-11-07 2002-04-09 Resmed Limited Administration of CPAP treatment pressure in presence of APNEA
US6397841B1 (en) 1997-06-18 2002-06-04 Resmed Limited Apparatus for supplying breathable gas
US20020124848A1 (en) * 1987-06-26 2002-09-12 Sullivan Colin Edward Method and apparatus useful in the diagnosis of obstructive sleep apnea of a patient
US6532957B2 (en) 1996-09-23 2003-03-18 Resmed Limited Assisted ventilation to match patient respiratory need
US6635021B1 (en) 1987-06-26 2003-10-21 Resmed Limited Method and apparatus useful in the diagnosis of obstructive sleep apnea of a patient
US20070083094A1 (en) * 2005-10-11 2007-04-12 Colburn Joel C Medical sensor and technique for using the same
US7320320B2 (en) 1993-11-05 2008-01-22 Resmed Limited Determination of patency of the airway
US20080076993A1 (en) * 2006-09-27 2008-03-27 Nellcor Puritan Bennett Incorporated Medical sensor 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
US20080075633A1 (en) * 2006-09-25 2008-03-27 Rafael Ostrowski Carbon dioxide detector having borosilicate substrate
US20080081003A1 (en) * 2006-09-25 2008-04-03 Rafael Ostrowski Carbon dioxide detector having borosilicate substrate
US20080078394A1 (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
US8844537B1 (en) 2010-10-13 2014-09-30 Michael T. Abramson System and method for alleviating sleep apnea

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US820259A (en) * 1906-01-29 1906-05-08 James Sidney Renvoize Spirometer.
US2153254A (en) * 1936-11-20 1939-04-04 Johnston Method and means of measuring fluid flow
US2210417A (en) * 1937-11-01 1940-08-06 Myron M Kinley Leak detector
US2376971A (en) * 1943-03-18 1945-05-29 Morris W Kleit Sonant respiration indicator
US2431328A (en) * 1946-09-13 1947-11-25 Wayland E Hull Respiroscope
US2596152A (en) * 1951-03-30 1952-05-13 Jr John R Johnson Oxygen breathing system
US2757533A (en) * 1951-01-02 1956-08-07 Phillips Petroleum Co Gas leak detector for well casing
US2760184A (en) * 1952-08-22 1956-08-21 Tidewater Oil Company System for detecting solids in gaseous streams
US2807012A (en) * 1953-06-08 1957-09-17 Schwarz Herbert Transfusion monitoring device

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US820259A (en) * 1906-01-29 1906-05-08 James Sidney Renvoize Spirometer.
US2153254A (en) * 1936-11-20 1939-04-04 Johnston Method and means of measuring fluid flow
US2210417A (en) * 1937-11-01 1940-08-06 Myron M Kinley Leak detector
US2376971A (en) * 1943-03-18 1945-05-29 Morris W Kleit Sonant respiration indicator
US2431328A (en) * 1946-09-13 1947-11-25 Wayland E Hull Respiroscope
US2757533A (en) * 1951-01-02 1956-08-07 Phillips Petroleum Co Gas leak detector for well casing
US2596152A (en) * 1951-03-30 1952-05-13 Jr John R Johnson Oxygen breathing system
US2760184A (en) * 1952-08-22 1956-08-21 Tidewater Oil Company System for detecting solids in gaseous streams
US2807012A (en) * 1953-06-08 1957-09-17 Schwarz Herbert Transfusion monitoring device

Cited By (73)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4475559A (en) * 1981-10-09 1984-10-09 Mary Horn Apparatus and method for detecting apnea
US4543951A (en) * 1982-11-30 1985-10-01 Senko Medical Instrument Mfg. Co., Ltd. Respirator with two jet gas injection tubes
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
US20070051371A1 (en) * 1987-06-26 2007-03-08 Sullivan Colin E Method and apparatus useful in the diagnosis of obstructive sleep apnea of a patient
US20020124848A1 (en) * 1987-06-26 2002-09-12 Sullivan Colin Edward Method and apparatus useful in the diagnosis of obstructive sleep apnea of a patient
US6635021B1 (en) 1987-06-26 2003-10-21 Resmed Limited Method and apparatus useful in the diagnosis of obstructive sleep apnea of a patient
US20050283089A1 (en) * 1987-06-26 2005-12-22 Colin Sullivan Method and apparatus useful in the diagnosis of obstructive sleep apnea of a patient
US7004908B2 (en) 1987-06-26 2006-02-28 Resmed Limited Method and apparatus useful in the diagnosis of obstructive sleep apnea of a patient
US7141021B2 (en) 1987-06-26 2006-11-28 Resmed Limited Method and apparatus useful in the diagnosis of obstructive sleep apnea of a patient
US4830022A (en) * 1987-07-27 1989-05-16 Medical Engineering And Development, Inc. Animal monitoring system
US4832015A (en) * 1988-05-19 1989-05-23 Trudell Medical Pediatric asthmatic inhaler
US5134996A (en) * 1991-01-09 1992-08-04 Smiths Industries Medical Systems, Inc. Inspiration and expiration indicator for a suction catheter
US8381722B2 (en) 1993-11-05 2013-02-26 Resmed Limited Distinguishing between closed and open airway apneas and treating patients accordingly
US8752547B2 (en) 1993-11-05 2014-06-17 Resmed Limited Distinguishing between closed and open airway apneas and treating patients accordingly
US7320320B2 (en) 1993-11-05 2008-01-22 Resmed Limited Determination of patency of the airway
US6138675A (en) * 1993-11-05 2000-10-31 Resmed Ltd. Determination of the occurrence of an apnea
US7730886B2 (en) 1993-11-05 2010-06-08 Resmed Limited Determination of patency of the airway
US8360060B2 (en) 1993-11-05 2013-01-29 Resmed Limited Distinguishing between closed and open airway apneas and treating patients accordingly
US6029665A (en) * 1993-11-05 2000-02-29 Resmed Limited Determination of patency of airway
US6091973A (en) * 1995-04-11 2000-07-18 Resmed Limited Monitoring the occurrence of apneic and hypopneic arousals
US6363270B1 (en) 1995-04-11 2002-03-26 Resmed Limited Monitoring the occurrence of apneic and hypopneic arousals
US6155986A (en) * 1995-06-08 2000-12-05 Resmed Limited Monitoring of oro-nasal respiration
US6237592B1 (en) 1995-07-03 2001-05-29 Resmed Limited Auto-calibration of pressure transducer offset
US6332463B1 (en) 1995-09-15 2001-12-25 Resmed Limited Flow estimation and compensation of flow-induced pressure swings in CPAP treatment and assisted respiration
US6182657B1 (en) 1995-09-18 2001-02-06 Resmed Limited Pressure control in CPAP treatment or assisted respiration
US6526974B1 (en) 1995-09-18 2003-03-04 John William Ernest Brydon Pressure control in CPAP treatment or assisted respiration
US6213119B1 (en) 1995-10-23 2001-04-10 Resmed Limited Inspiratory duration in CPAP or assisted respiration treatment
US6253764B1 (en) 1996-05-08 2001-07-03 Resmed, Ltd. Control of delivery pressure in CPAP treatment or assisted respiration
US6279569B1 (en) 1996-08-14 2001-08-28 Resmed Limited Determination of leak and respiratory airflow
US6152129A (en) * 1996-08-14 2000-11-28 Resmed Limited Determination of leak and respiratory airflow
US8051853B2 (en) 1996-09-23 2011-11-08 Resmed Limited Method and apparatus for providing ventilatory assistance
US6532957B2 (en) 1996-09-23 2003-03-18 Resmed Limited Assisted ventilation to match patient respiratory need
US7644713B2 (en) 1996-09-23 2010-01-12 Resmed Limited Method and apparatus for determining instantaneous leak during ventilatory assistance
US6688307B2 (en) 1996-09-23 2004-02-10 Resmed Limited Methods and apparatus for determining instantaneous elastic recoil and assistance pressure during ventilatory support
US8733351B2 (en) 1996-09-23 2014-05-27 Resmed Limited Method and apparatus for providing ventilatory assistance
US6810876B2 (en) 1996-09-23 2004-11-02 Resmed Ltd. Assisted ventilation to match patient respiratory need
US9974911B2 (en) 1996-09-23 2018-05-22 Resmed Limited Method and apparatus for providing ventilatory assistance
US5749358A (en) * 1996-10-10 1998-05-12 Nellcor Puritan Bennett Incorporated Resuscitator bag exhaust port with CO2 indicator
US5836302A (en) * 1996-10-10 1998-11-17 Ohmeda Inc. Breath monitor with audible signal correlated to incremental pressure change
US6029660A (en) * 1996-12-12 2000-02-29 Resmed Limited Substance delivery apparatus
US6397841B1 (en) 1997-06-18 2002-06-04 Resmed Limited Apparatus for supplying breathable gas
US9526855B2 (en) 1997-11-07 2016-12-27 Resmed Limited Administration of CPAP treatment pressure in presence of apnea
US6367474B1 (en) 1997-11-07 2002-04-09 Resmed Limited Administration of CPAP treatment pressure in presence of APNEA
US8684000B2 (en) 1997-11-07 2014-04-01 Resmed Limited Administration of CPAP treatment pressure in presence of apnea
US6192876B1 (en) * 1997-12-12 2001-02-27 Astra Aktiebolag Inhalation apparatus and method
US6349720B1 (en) * 1998-06-25 2002-02-26 Integrated Medical Systems, Inc. Apparatus for acoustically determining position of an endotracheal tube
US6202646B1 (en) 1998-12-23 2001-03-20 Para Products Incorporated Detection device for verifying the proper intubation of an endotracheal tube
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
US8420405B2 (en) 2006-09-25 2013-04-16 Covidien Lp Carbon dioxide detector having borosilicate substrate
US8431087B2 (en) 2006-09-25 2013-04-30 Covidien Lp Carbon dioxide detector having borosilicate substrate
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
US20080083265A1 (en) * 2006-09-25 2008-04-10 Rafael Ostrowski Carbon dioxide detector having borosilicate substrate
US8109272B2 (en) 2006-09-25 2012-02-07 Nellcor Puritan Bennett Llc 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
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
US20080077034A1 (en) * 2006-09-25 2008-03-27 Baker Clark R Carbon dioxide-sensing airway products and technique for using the same
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
US8431088B2 (en) 2006-09-25 2013-04-30 Covidien Lp Carbon dioxide detector having borosilicate substrate
US8449834B2 (en) 2006-09-25 2013-05-28 Covidien Lp 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
US20080072913A1 (en) * 2006-09-25 2008-03-27 Baker Clark R Carbon dioxide-sensing airway products and technique for using the same
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
US8844537B1 (en) 2010-10-13 2014-09-30 Michael T. Abramson System and method for alleviating sleep apnea
US9763767B2 (en) 2010-10-13 2017-09-19 Michael T. Abramson System and method for alleviating sleep apnea

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