초록 ▼

A portable sleep monitoring system for recording on tape, transcribing and charting a plurality of physiologic data channels recorded relative to a known constant, user-transparent time base. Selected ECG, air flow, impedance and pulse oximetry sensor inputs are recorded under microprocessor control

A portable sleep monitoring system for recording on tape, transcribing and charting a plurality of physiologic data channels recorded relative to a known constant, user-transparent time base. Selected ECG, air flow, impedance and pulse oximetry sensor inputs are recorded under microprocessor control relative to a crystal controlled 40 Hz signal modulated with the physiologic data from one of the sensors. Upon reading the physiologic data from tape and/or charting, the collected data is displayed with the time base, normalized to the known crystal controlled timing signal. In the heart rate mode, QRS occurences are displayed on the heart rate trace line as singular hash marks. The presence of motion at the pulse O2 sensor is indicated by multiplexing high frequency hash markings onto the O2 saturation trace line. Calibration levels relating to four different O2 saturation percent vales are periodically written to tape for reference during tape reading.

대표청구항 ▼

Cardio respiratory monitoring apparatus comprising: (a) means for receiving n physiologic input signals from a plurality of transducers coupled to a study subject including at least an electrocardiographic (ECG) signal, a pulse signal, a plethysomographic signal, and an oximetry signal and an impeda

Cardio respiratory monitoring apparatus comprising: (a) means for receiving n physiologic input signals from a plurality of transducers coupled to a study subject including at least an electrocardiographic (ECG) signal, a pulse signal, a plethysomographic signal, and an oximetry signal and an impedance respiration signal; (b) a clock source; (c) means coupled to said clock source for producing a periodic time base signal in the range of 20 to 40Hz; (d) means for modulating said impedance respiration signal with said time base signal; (e) means for selectively modulating said pulse signal with said oximetry signal; and (f) means for recording each of said physiologic input signals and said modulated time base signal on n-1 data tracks.