Title:
CALIBRATION METHODS AND APPARATUS FOR PLETHYSMOGRAPHIC MEASUREMENT CHAMBERS
Document Type and Number:
WIPO Patent Application WO2003058175
Kind Code:
A3
Abstract:
Methods and apparatus for calibrating volume measurement in a plethysmographic chamber are described. The present invention involves the use of a calibration volume chamber of known volume (36) coupled to a plethysmographic measurement chamber in a plethysmographic measurement system (30) for determining body composition (22), wherein a computer system (30) calibrates the measurement system prior to conducting a volume (36) measurement of a test subject, by measuring the chamber volume before and after opening an electronically controlled valve (40) that connects the controlled calibration volume to the plethysmographic chamber, and comparing the measured chamber volumes based on the known reference (36) volume.
Inventors:
DEMPSTER PHILIP T
Application Number:
PCT/US2002/041579
Publication Date:
March 04, 2004
Filing Date:
December 26, 2002
Export Citation:
Assignee:
LIFE MEASUREMENT INC (US)
International Classes:
A61B5/103; A61B5/107; (IPC1-7): A61B5/02
Foreign References:
| US5105825A | 1992-04-21 | |||
| US4539997A | 1985-09-10 | |||
| US4676253A | 1987-06-30 | |||
| US4406289A | 1983-09-27 | |||
| US4841982A | 1989-06-27 |
Other References:
See also references of EP 1460934A4
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