Oro-pharyngeal airway with breath monitor
First Claim
1. A method of monitoring the carbon dioxide of a patient'"'"'s breath while the patient is under general anesthesia, comprising:
- intubating the patient'"'"'s throat with an airway having an air conduit extending therethrough and extending from the mouth of the patient to the larynx of the patient, maintaining an air passage between the airway and the facing surfaces of the patient'"'"'s throat to permit the patient to breathe about the airway, withdrawing breath from about the larynx of the patient through the air conduit of the airway and to a carbon dioxide monitor, and monitoring the carbon dioxide content of the patent'"'"'s breath withdrawn from about the larynx with the carbon dioxide monitor.
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Abstract
An oro-pharyngeal airway includes external air passages (28) formed between it and the facing surfaces of the patient'"'"'s throat for continuous breathing by the patient. The open-ended passage (26) of conduit (24) transmits exhaled breath of the patient directly from the distal end of the airway at the larynx into the plenum (50) at the proximal end of the airway, and the breath is extracted radially from the plenum though the conduit section (34) and is analyzed by monitor (40). Alternatively, oxygen can be provided from source (42) through the converging conduit section (32) of the elongated body, and mucus, etc. can be aspirated from the larynx area of the throat by suction pump (44). These functions can take place without the need for additional intubation of the patient.
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Citations
16 Claims
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1. A method of monitoring the carbon dioxide of a patient'"'"'s breath while the patient is under general anesthesia, comprising:
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intubating the patient'"'"'s throat with an airway having an air conduit extending therethrough and extending from the mouth of the patient to the larynx of the patient, maintaining an air passage between the airway and the facing surfaces of the patient'"'"'s throat to permit the patient to breathe about the airway, withdrawing breath from about the larynx of the patient through the air conduit of the airway and to a carbon dioxide monitor, and monitoring the carbon dioxide content of the patent'"'"'s breath withdrawn from about the larynx with the carbon dioxide monitor. - View Dependent Claims (2, 3, 4, 5)
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6. Apparatus for monitoring the carbon dioxide of a patient'"'"'s breath when under anesthesia, comprising:
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an oro-pharyngeal airway for insertion into a person'"'"'s throat comprising;
an elongate body having a proximal end and a distal end, said proximal end of said body sized and shaped for engagement by a person'"'"'s mouth and having a radially extending member configured to block the movement of said proximal end into the patient'"'"'s mouth, said body being of a predetermined length so that when said proximal end is at the patient'"'"'s mouth said distal end is positioned at the person'"'"'s larynx, said elongate body defining an open ended passage extending through the length of said body and being open at the proximal and distal ends of said body, a nipple extending beyond said radially extending flange, said nipple having an opening that is co-extensive with said open ended passage, a radially extending conduit having a passage therethrough in communication with said open ended passage of said elongate body and said opening of said nipple, for the passage therethrough of breath exhaled from the area of the patient'"'"'s larynx, protrusions extending from the elongated body shaped to engage the facing surfaces of the throat of the patient and form a breathing passageway extending along and externally of said conduit means, a carbon dioxide monitor in communication with the passage of said radially extending conduit for detecting the carbon dioxide received through the conduit of said body from the distal end of the body at the larynx of the patient. - View Dependent Claims (7, 8, 9, 10, 11, 13, 14, 15)
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12. Apparatus for monitoring carbon oxide of a patient'"'"'s breath, comprising:
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an oro-pharyngeal airway for insertion in the throat of a patient, said airway having a proximal end for placement at the patient'"'"'s mouth and a distal end for placement through the patient'"'"'s throat adjacent the larynx of the patient, said airway defining an open ended, approximately cylindrical passage therethrough, ribs extending externally along the length of the airway for engagement with the facing surface of the throat of the patient for forming an external passage about the airway so that the patient can breath about the airway, a nipple at said proximal end of said airway extending co-extensively from said passage for connection with a suction device or an insufflation device, a protrusion at said proximal end of said conduit between said nipple and said conduit for engagement by the lips of the patient to prevent the proximal end of the airway from entering the mouth of the patient, a T-connection formed between said protrusion and said nipple and an orifice extending through said T-connection to said passage of said airway for controlling the movement of breath exhaled from the patient through said passage, and a carbon dioxide monitor in communication with said T-connection for detecting the carbon dioxide in the patient'"'"'s breath received from about the larynx without having passed through the mouth of the patient.
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16. Apparatus for monitoring carbon oxide of a patient'"'"'s breath, comprising:
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an oro-pharyngeal airway for insertion in the throat of a patient, said airway having an elongated body with a proximal end for placement at the patient'"'"'s mouth and a distal end for placement through the patient'"'"'s throat adjacent the larynx of the patient, said elongated body of said airway defining an open ended passage therethrough, ribs extending externally along the length of said elongated body of the airway for engagement with the facing surface of the throat of the patient for forming an external passage about the airway so that the patient can breath about the airway, a nipple at said proximal end of said elongated body of said airway and defining a passage extending co-extensively from said open ended passage of said elongated body, a T-connection formed at said nipple with a passage of the T- connection intersecting the passage of said nipple and the open ended passage of said elongated body, said T-connection forming a plenum of a breadth greater than the breadth of said airway for receiving the exhaled breath of the patient, and a breath monitor in communication with said T-connection for receiving the patient'"'"'s breath from said plenum and detecting the content of the patient'"'"'s breath received from about the larynx without having the breath passed in contact with the mouth of the patient.
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Specification