Continuous positive airway pressure therapy device
First Claim
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1. A respiratory therapy device for applying a continuous positive airway pressure to the respiratory system of a user during a breathing cycle of inhalation, pause and exhalation, comprising:
- a housing having an opening therethrough through which a user may inhale inspiratory air into the user'"'"'s respiratory system and exhale expiratory air from the user'"'"'s respiratory system, said housing having a proximal end for engagement by a user and through which the user inhales and exhales, said housing having a distal end open to ambient air and through which user generated inspiratory air and expiratory air passes, an air flow amplification chamber within said housing positioned between said proximal end and said distal end of said housing for accelerating the flow of ambient air through said distal end during a user'"'"'s inhalation of air through said proximal end of said housing, a gas port in fluid communication with said amplification chamber for coupling a source of pressurized gas through said housing into said amplification chamber, a conduit carried within said amplification chamber and communicating inspiratory air and expiratory air from said proximal end of said housing to said amplification chamber, said conduit having an open end thereof shaped in a Coanda profile for generating a Coanda effect on gas flowing thereover, and an orifice spaced a predetermined distance from said open end of said conduit for forming an annular opening about said conduit open end through which gas passing into said amplification chamber from said gas port flows to create a Coanda effect during a user'"'"'s inhalation of ambient air producing a continuous positive airway pressure on the user'"'"'s respiratory system during inhalation of ambient air.
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Abstract
An improved continuous positive airway pressure therapy device including a ring orifice through which compressed air or oxygen is introduced to effectively amplify the air flow to the patient by drawing ambient air into the device inlet for maintaining a continuous positive pressure of a patient'"'"'s lungs during all portions of the breathing cycle.
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Citations
12 Claims
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1. A respiratory therapy device for applying a continuous positive airway pressure to the respiratory system of a user during a breathing cycle of inhalation, pause and exhalation, comprising:
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a housing having an opening therethrough through which a user may inhale inspiratory air into the user'"'"'s respiratory system and exhale expiratory air from the user'"'"'s respiratory system, said housing having a proximal end for engagement by a user and through which the user inhales and exhales, said housing having a distal end open to ambient air and through which user generated inspiratory air and expiratory air passes, an air flow amplification chamber within said housing positioned between said proximal end and said distal end of said housing for accelerating the flow of ambient air through said distal end during a user'"'"'s inhalation of air through said proximal end of said housing, a gas port in fluid communication with said amplification chamber for coupling a source of pressurized gas through said housing into said amplification chamber, a conduit carried within said amplification chamber and communicating inspiratory air and expiratory air from said proximal end of said housing to said amplification chamber, said conduit having an open end thereof shaped in a Coanda profile for generating a Coanda effect on gas flowing thereover, and an orifice spaced a predetermined distance from said open end of said conduit for forming an annular opening about said conduit open end through which gas passing into said amplification chamber from said gas port flows to create a Coanda effect during a user'"'"'s inhalation of ambient air producing a continuous positive airway pressure on the user'"'"'s respiratory system during inhalation of ambient air. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A respiratory therapy device for applying a continuous positive airway pressure to the respiratory system of a user during a breathing cycle of inhalation, pause and exhalation, comprising:
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a housing having an opening therethrough through which a user may inhale inspiratory air into the user'"'"'s respiratory system and exhale expiratory air from the user'"'"'s respiratory system, said housing having a proximal end for engagement by a user and through which the user inhales and exhales, said housing having a distal end open to ambient air and through which user generated inspiratory air and expiratory air passes, an air flow amplification chamber within said housing positioned between said proximal end and said distal end of said housing for accelerating the flow of ambient air through said distal end during a user'"'"'s inhalation of air through said proximal end of said housing, said amplification chamber having a first end wall adjacent to said proximal end of said housing and a second end wall adjacent to said distal end of said housing, a gas port in fluid communication with said amplification chamber for coupling a source of pressurized gas through said housing into said amplification chamber, a conduit carried by said first end wall of said amplification chamber and communicating inspiratory air and expiratory air from said proximal end of said housing to said amplification chamber, said conduit having an open end thereof shaped in a Coanda profile for generating a Coanda effect on gas flowing thereover, and an orifice formed in said second end wall of said amplification chamber and spaced a predetermined distance from said open end of said conduit for forming an annular opening about said conduit open end through which gas passing into said amplification chamber from said gas port flows to create a Coanda effect during a user'"'"'s inhalation of ambient air producing a continuous positive airway pressure on the user'"'"'s respiratory system during inhalation of ambient air. - View Dependent Claims (9, 10, 11, 12)
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Specification