| US 7,559,899 B2 | ||
| Power saving techniques for continuous heart rate monitoring | ||
| Thomas Ying-Ching Lo, Fremont, Calif. (US); and Karthik H. Katingari, Milpitas, Calif. (US) | ||
| Assigned to Salutron, Inc., Fremont, Calif. (US) | ||
| Filed on Apr. 12, 2006, as Appl. No. 11/402,476. | ||
| Prior Publication US 2007/0244398 A1, Oct. 18, 2007 | ||
| Int. Cl. A61B 5/02 (2006.01) | ||
| U.S. Cl. 600—502 [600/500; 600/481] | 25 Claims |
| 1. A method for determining a heart rate, comprising:
transmitting a continuous signal towards a subject's artery for an initial period of time;
using a microcontroller, determining an initial heart rate of the subject from a reflected continuous signal received during
the initial period of time;
using the microcontroller, determining a duration of a subsequent period of time based on the initial heart rate;
transmitting a non-continuous signal towards the artery during the subsequent period of time after the initial period of time;
using the microcontroller, determining the subsequent heart rate of the subject from a reflected non-continuous signal; and
using the microcontroller, determining the subject's initial heart rate is not associated with strenuous activity by the subject,
the transmitting the non-continuous signal is responsive to the determining the subject's initial heart rate is not associated
with strenuous activity by the subject.
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