| US 7,584,752 B2 | ||
| Device and process for controlling a respirator | ||
| Yvo Gärber, Lübeck (Germany); Hans Matthiessen, Bad Schwartau (Germany); Dieter Weismann, Gross Grönau (Germany); and Eckhard Teschner, Lübeck (Germany) | ||
| Assigned to Dräger Medical AG & Co. KG, Lübeck (Germany) | ||
| Filed on Mar. 23, 2006, as Appl. No. 11/277,270. | ||
| Claims priority of application No. 10 2005 022 896 (DE), filed on May 18, 2005. | ||
| Prior Publication US 2006/0260611 A1, Nov. 23, 2006 | ||
| Int. Cl. A61M 15/00 (2006.01) | ||
| U.S. Cl. 128—204.23 | 8 Claims |
| 1. A process for controlling a respirator in combination with an electroimpedance measuring device, which receives impedance
measured signals U via an electrode application arranged on the upper body of a test subject, the process comprising the steps
of:
setting a mode for pressure-controlled or volume-controlled, mechanical respiration on the respirator during a first respiration
phase;
obtaining end-expiratory values of said impedance measured signals U during one respiration phase of a respiration cycle of
mechanical respiration, said values being correlated with the respiration cycle;
calculating a first reference value Uref1 from the obtained end-expiratory values of the impedance measured signals U;
obtaining other end-expiratory values of said impedance measured signals U during another respiration phase during mechanical
respiration;
forming a second reference value Uref3 from the other end-expiratory values of said impedance measured signals; and
forming a difference from the second reference value Uref3 and the first reference value Uref/1 to provide an indicator of a change in the functional residual capacity (FRC) of a lung of the test subject.
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