초록 ▼

A flow meter system having a disposable mouthpiece including symmetrically disposed pitot tubes for measuring the velocity of the respiratory gases flowing through the mouthpiece and an electronic module including sensitive pressure transducers coupled to the mouthpiece and operative over a wide dyn

A flow meter system having a disposable mouthpiece including symmetrically disposed pitot tubes for measuring the velocity of the respiratory gases flowing through the mouthpiece and an electronic module including sensitive pressure transducers coupled to the mouthpiece and operative over a wide dynamic range provides input signals to a signal processing network for converting the pressure readings to flow information useful in cardiopulmonary performance analyzing equipment.

대표청구항 ▼

A respiratory gas flow measuring and indicating system comprising a tubular mouthpiece member of generally circular cross-section and including two symmetrically disposed cruciform ribs extending transverse to the longitudinal dimension of said tubular mouthpiece member, said ribs each including a p

A respiratory gas flow measuring and indicating system comprising a tubular mouthpiece member of generally circular cross-section and including two symmetrically disposed cruciform ribs extending transverse to the longitudinal dimension of said tubular mouthpiece member, said ribs each including a pair of lumens with one lumen of each pair in one rib in fluid communication with a corresponding lumen of the other pair of lumens in the other rib, each of said ribs including a plurality of symmetrically located apertures passing through the walls thereof into said pair of lumens and a further pair of apertures passing through the wall of said tubular mouthpiece member and individually aligned coaxially with said pair of lumens of one of said ribs, the passage of respiratory gases through said tubular mouthpiece member and over said cruciform ribs creating pressure differential in said pair of lumens of said one of said ribs.