Jeroen Veen,Theodorus Petrus Henricus Gerardus Jansen,Henricus Renatus Martinus Verberne,Tim Corneel Wilhelmus Schenk,Lorenzo Feri
申请号：
US12996991
公开号：
US08447372B2
申请日:
2009.06.09
申请国别(地区):
US
年份:
2013
代理人:
摘要：
The invention relates to a method of monitoring a vital parameter of a patient by measuring attenuation of light emitted onto tissue of the patient, comprising the following steps: modulating the light with a modulation frequency or/and a modulation code emitting the modulated light onto the tissue of the patient collecting light which is transmitted through the tissue or/and which is reflected from the tissue demodulating the collected light analyzing the demodulated collected light with regard to interference with ambient light determining a modulation frequency or/and a modulation code for which interference with the ambient light is minimized or falls under a predefined threshold and setting the modulation frequency or/and the modulation code for modulating the light according to the determined modulation frequency or/and a modulation code for which interference with the ambient light is minimized or falls under a predefined threshold. In this way a versatile and reliable possibility of monitoring a vital parameter of a patient with a high signal-to-interference ratio is provided.
