Data processing: measuring – calibrating – or testing – Measurement system in a specific environment – Chemical analysis
Reexamination Certificate
2011-02-08
2011-02-08
Raymond, Edward (Department: 2857)
Data processing: measuring, calibrating, or testing
Measurement system in a specific environment
Chemical analysis
C600S526000
Reexamination Certificate
active
07885771
ABSTRACT:
The invention relates to an apparatus for the acquisition and interpretation of expirograms comprising:a gas measuring probe that is designed to determine the gas concentration ƒmessof a gas in exhaled respiratory air;a reading device that is connected to the gas measuring probe via signal and is designed to read for a plurality of values x1, . . . , xNof an exhaled volume of the exhaled respiratory air the respective determined gas concentrations ƒmess(x1), . . . , ƒmess(xN) from the gas measuring probe;a storage device that is designed to store the values x1, . . . , xNassigned to the gas concentrations ƒmess(x1), . . . , ƒmess(xN);a function fitting unit that is connected to the storage device via signal and that is designed to determine a non-linear fit functionin-line-formulae description="In-line Formulae" end="lead"?ƒ(x)=g(x)·h(x)+OffsetGasin-line-formulae description="In-line Formulae" end="tail"? for the stored gas concentrations ƒmess(x1), . . . , ƒmess(xN) by determining functions g(x) and h(x) whereinh(x)=a+b·xg(x) is a continuously differentiable, non-linear function withg(0)=0andlimx->∞g(x)=const,a, b and const being constants andOffsetGasbeing a constant, mean concentration of the gas in room air.
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Prettin Stephan
Roecker Kai
Fish & Richardson P.C.
Raymond Edward
Universitaetslinkum Freiburg
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