| 摘要 |
<p>A device (100) for monitoring a subject's breathing rate is disclosed. A transducer (107) radiates energy towards the chest of a subject and receives the reflected energy. An analyzer (105) receives a signal corresponding to the reflected energy. The reflected energy would have undergone Doppler frequency shifts due to the motion of the chest of the subject due to breathing, with reference to the transducer. The analyzer (105) analyzes the signal to calculate the breathing rate by measuring at least one of a periodicity of the signal and a number of cycles per unit time of the signal. In a preferred embodiment the transducer (107) is disposed in or on a sphygmomanometer cuff to radiate energy towards the chest of the subj ect and receive the energy reflected by the chest of the subject.</p> |
