| US 7,465,275 B2 | ||
| Method and apparatus for measuring functional residual capacity (FRC) and cardiac output(CO) | ||
| Ola Stenqvist, Viken (Sweden) | ||
| Assigned to GE Healthcare Finland Oy, (Finland) | ||
| Appl. No. 10/479,390 PCT Filed May 29, 2002, PCT No. PCT/SE02/01019 § 371(c)(1), (2), (4) Date Jul. 22, 2004, PCT Pub. No. WO02/096289, PCT Pub. Date Dec. 05, 2002. |
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| Claims priority of application No. 0101912 (SE), filed on May 29, 2001. | ||
| Prior Publication US 2004/0249301 A1, Dec. 09, 2004 | ||
| Int. Cl. A61B 5/02 (2006.01); G01N 1/22 (2006.01); G01N 31/00 (2006.01); G01N 33/497 (2006.01) | ||
| U.S. Cl. 600—532 [73/23.3; 422/84] | 52 Claims |
| 1. A method for estimation of functional residual capacity (FRC) in a person, comprising:
establishing a breathing pattern;
determining the amount of oxygen and carbon dioxide being inhaled and exhaled during a first breathing cycle comprised by
said breathing pattern;
accomplishing a first change in said breathing pattern of known magnitude;
determining the amount of oxygen and carbon dioxide being inhaled and exhaled during a second breathing cycle;
estimating the FRC based on the determined amounts of oxygen and carbon dioxide in said first and second breathing cycles.
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