Closed circuit breathing apparatus and method of using same
First Claim
1. A closed circuit breating apparatus adapted for connectionto an oxygen supply for providing oxygen to a subject for breathing, the subject introducing carbon dioxide and other fluids into the apparatus while breathing, said appaatus comprising:
- a conection element having a first end and a second end adapted to be secured to the subject in fluid communication with the respiratory system of the subject;
a non-return valve comprising;
a housing in closed circuit fluid communication with said first end of said connection element;
a one-way inhalation valve means for allowing oxygen to enter said housing when the subject inhales;
a one-way exhalation valve means for allowing oxygen and other exhaled fluids to exit said housing when the subject exhales;
an inhalation conduit in closed circuit fluid communication with said housing and connected to said housing adjacent said inhalation valve means to transport oxygen to said housing for the subject to inhale;
an exhalation conduit in closed circuit fluid communication with said housing and connected to said housing adjacent said exhalation valve means to transport oxygen and other exhaled fluids from said housing with the subject exhales;
carbon dioxide absorption means in closed circuit fluid communication between said inhalation and exhalation conduits for absorbing carbon dioxide exhaled by the subject;
means for connecting said carbon dioxide absorption means to receive fluids from said exhalation conduit and furnish purified fluids to said inhalation conduit;
an expansible breathing bag connected through said inhalation conduit in flow communication with said housing of said non-return valve assembly;
supply means including inlet tubing means mounted in said exhalation conduit for selectively introducing oxygen from the oxygen supply to a point adjacent said exhalation valve means for passage to said inhalation conduit through said carbon dioxide absorption means; and
purge means including outlet tubing means mounted in said inhalation conduit and extending in said inhalation conduit to a point adjacent said inhalation valve means for purging fluids from the apparatus.
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Accused Products
Abstract
A breathing apparatus provides a closed circuit which is capable of delivering substantially pure oxygen and removing carbon dioxide exhaled by a subject. The apparatus has low breathing resistance, the ability to provide intermittent positive pressure breathing and can be completely and efficiently purged of inert gases and other fluid impurities which are initially in the apparatus or exhaled by the subject. A carbon dioxide removal system in the apparatus prevents channeling of exhaled gases through scrubber material, thereby insuring efficient carbon dioxide removal. The condition of the carbon dioxide absorption material can be determined by visual inspection by an attendant while the subject is connected to the apparatus.
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Citations
13 Claims
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1. A closed circuit breating apparatus adapted for connectionto an oxygen supply for providing oxygen to a subject for breathing, the subject introducing carbon dioxide and other fluids into the apparatus while breathing, said appaatus comprising:
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a conection element having a first end and a second end adapted to be secured to the subject in fluid communication with the respiratory system of the subject; a non-return valve comprising; a housing in closed circuit fluid communication with said first end of said connection element; a one-way inhalation valve means for allowing oxygen to enter said housing when the subject inhales; a one-way exhalation valve means for allowing oxygen and other exhaled fluids to exit said housing when the subject exhales; an inhalation conduit in closed circuit fluid communication with said housing and connected to said housing adjacent said inhalation valve means to transport oxygen to said housing for the subject to inhale; an exhalation conduit in closed circuit fluid communication with said housing and connected to said housing adjacent said exhalation valve means to transport oxygen and other exhaled fluids from said housing with the subject exhales; carbon dioxide absorption means in closed circuit fluid communication between said inhalation and exhalation conduits for absorbing carbon dioxide exhaled by the subject; means for connecting said carbon dioxide absorption means to receive fluids from said exhalation conduit and furnish purified fluids to said inhalation conduit; an expansible breathing bag connected through said inhalation conduit in flow communication with said housing of said non-return valve assembly; supply means including inlet tubing means mounted in said exhalation conduit for selectively introducing oxygen from the oxygen supply to a point adjacent said exhalation valve means for passage to said inhalation conduit through said carbon dioxide absorption means; and purge means including outlet tubing means mounted in said inhalation conduit and extending in said inhalation conduit to a point adjacent said inhalation valve means for purging fluids from the apparatus. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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Specification