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US 6,203,502 B1Granted
Respiratory function monitor
AssigneePryon Incorporated
InventorsEdwin J. Hilgendorf, Son Duc Tran, Steven P. Pruzina, Mark Storsved
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Abstract
A respiratory function monitoring device comprising a flow sensor and a conversion device is herein disclosed. Also disclosed are structures for carrying out an auto-zero calibration, a purging function, and temperature compensation. Methods for implementing the auto-zero calibration, the purge function, and the temperature compensation are also disclosed.
Claims11
A respiratory function monitoring device comprising:
- a flow sensing device in fluidic communication with a first and a second pressure transducer, the first pressure transducer arranged to measure a differential pressure corresponding to a gas flow rate, the second pressure transducer arranged to measure a static pressure;
- amplifying means electrically connected to the first and second pressure transducers, the amplifying means for amplifying voltage signals output by the pressure transducers;
- an analog to digital converter for translating the analog voltage valves derived from the first and second pressure transducers;
- a central processing unit arranged to communicate with the analog to digital converter, the central processing unit being capable of executing a program, the program being designed to convert the digital voltage values from the first pressure transducer into flow rate data and the voltage values from the second pressure transducer into pressure data;
- and
- an input/output means for communicating the flow rate and pressure data to a host system wherein the flow sensing device comprises a hollow cylindrical body having a bore with a first end and a second end, the first and second ends arranged for connection between a ventilator and a patient;
- a strut disposed within the bore of the body across the entire diameter of the bore and parallel to the axis of symmetry of the bore, the strut having symmetrical end portions flowing aerodynamically from a center portion, the symmetrical end portions each having a leading edge with a groove formed therein.
4 more elements
A respiratory function monitoring device comprising:
- a flow sensing device having a hollow cylindrical body with a bore and a first end and a second end, the first and second ends arranged for connection between a ventilator and a patient;
- a strut disposed within the bore of the body of the flow sensing device, the strut having symmetrical end portions flowing aerodynamically from a center portion, the symmetrical end portions each having a leading edge with a groove formed therein, the respective grooves extending across substantially the entire height of the strut;
- a pair of lumens coupled to an outer surface of the flow sensing device, each lumen communicating with a respective groove so as to permit the measurement of a differential pressure of a gas flowing through the flow sensing device;
- the flow sensing device being in fluidic communication via the pair of lumens with a pair of differential pressure transducers, a first of the pair of transducers arranged to measure a differential pressure corresponding to a gas flow rate a second of the pair of transducers arranged to measure a static pressure;
- amplifying means for amplifying voltage signals output by the transducers;
- an analog to digital converter for translating the analog voltage valves derived from the transducers;
- a central processing unit arranged to communicate with the analog to digital converter, the central processing unit being capable of executing a program, the program being designed to convert the digital voltage values from the first transducer into flow rate data and the voltage values from the second transducer into pressure data;
- and
- an input/output means for communicating flow rate and pressure data to a host system.
6 more elements
Dependencies are inferred from the claim text.