Patent
Remote pulmonary function tester
Ted E. Dunning,Paul L. Enright +1 more
- 26 Jul 1979
134
TL;DR: In this article, a remote pulmonary function tester uses a microcomputer to receive patient identification data, direct the test sequence, store several FEV maneuvers, and then transmit the stored data in a digital format to a central computer.
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Abstract: A remote pulmonary function tester uses a microcomputer to receive patient identification data, direct the test sequence, store several FEV maneuvers, and then transmit the stored data in a digital format to a central computer. The central computer plots a flow volume curve, computes FEV, FEF25-75% etc., compares these values with normals, and performs a preliminary disease categorization. The pulmonary function tester comprises a flow to pressure transducer, producing an analog signal, an analog to digital converter for digitizing the analog signal, a touch tone keyboard for simple patient identification data entry, and a microcomputer system having a read/write storage for storage of test and patient identification data, communication interface for connection to a central computer through telephone lines, and a read only memory and a central processing unit for control of the tester.
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Citations
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References
Patent
Pulmonary information transmission system
R Griffis,L Rauterkus,T Torzala +2 more
- 20 Sep 1971
TL;DR: In this paper, the authors describe a system by which signals pertaining to the pulmonary condition of a patient are transmitted to a location which is remote from the location of the patient, and at the remote location the transmitted information may be studied by a person who is well acquainted in the art of analysis of such information.
81
Patent
Automated pulmonary function testing apparatus
James R. Greenwood,Philip M. Miller,Thomas S. Whitacre +2 more
- 24 Oct 1975
TL;DR: In this paper, an automated pulmonary function testing apparatus includes a spirometer responsive to the breathing efforts of a patient for producing electrical signals which vary in accordance with volumes of breathed gas and central processing means for calculating one or more pulmonary function parameters associated with such volumes.
41
Patent
Real-time cyclic pulmonary function test system
Edwin G Vail,Jr Maxwell W Lippitt,Phillip D Seymour +2 more
- 15 May 1974
TL;DR: In this article, a pulmonary function testing system is described, together with a method of testing, which system is characterized by sensing of flow, volume, pressure, and constituent parameters of respiratory gases, in a real time sense.
34
Patent
Spirometer apparatus and method
Dempster Philip T,Pun John Y +1 more
- 28 Jan 1974
TL;DR: In this paper, a spirometer using an open-end flow pneumotach with a flow restriction is used to create a pressure elevation in proportion to flow, which is then measured by a sample and hold circuit.
28
Patent
Spring-loaded brake cylinder for a railway vehicle brake
Paul Willy Meissner
- 05 Sep 1974
TL;DR: In this article, a spring-loaded brake cylinder has a piston therein one side of which is loaded by a spring and the other side which is subjected to a pressure medium introduced into the cylinder, and an auxiliary release device comprising a screw coupling having a first coupling member which is rotatable but not axially displaceable and a second coupling member threadedly engaged with the first coupling members and acting upon the brake cylinder through an abutment coupling against the force of the load spring.
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