The Performance Test And Clinical Application Of A New Remote Electrocardiography Monitoring System Based On CDMA

Objective: To test the performance of this remote electrocardiography monitoring system in different state and environment.To contrast the detection rate, sensitivity and stability of a new kind of remote electrocardiography monitoring instrument and control instrument, then evaluating this instrument's clinical practice value.Methods: Performance test: Inputting analog signals to the electrocardiogram monitoring instrument to check the sensitivity, accuracy, stability and alarm function of this monitoring system. This test is executed according to the standard of electrocardiogram monitor (YY91079-1999) in the condition of rest, kin estate and some special environment, such as basement or laboratory.Clinical research: This research is a stochastic, cross-reference and blind trial. Total 60 subjects were admitted to this research. They were assigned in three different groups. Thirty subjects were received static monitoring, twenty subjects were received dynamic monitor, ten subjects were received remote monitor. These electrocardiograms which were printed during the monitoring were measured by an independent cardiovascular doctor to survey the baseline stability, profile uniformity, ST segment change sensitivity and heart rate monitor accuracy.Results: Performance test: 1. In the static state, the standard sensitivity of this system is 10 mm/mV and the maximum sensitivity is 30 mm/mV. There is no baseline drift with the change of time and temperature. The change of swing is only 0.9% when inputting a polarizing voltage of 300mV. The accuracy of swing is lmV+0.1% when inputting a standard voltage of 1 mV.2. In dynamic state, the accuracy of swing is 1mV+0.2% when inputting a standard voltage of 1 mV. The rest is the same as that of static test.3. In laboratory, the baseline changed 1mm in the time drift test and changed 0.2 mm/℃in the temperature drift test; the other index is the same as that of static test. In basement, the time of alarm get long and the other index is the same as that of static test.Clinical researcher: 1. In the rest state, the baseline drift of measuring instrument is (1.00±1.92) mm, and the control instrument is (0.00±0.00) mm, the results have statistically significant difference (P <0.01) . The electrocardiographic parameter of the two group , such as the swing and time of QRS and the change of ST segment, has no statistical difference (P>0.05) .2. In dynamic group, there is no significant difference(P<0.01 )of the baseline drift of the two; The electrocardiographic parameter of the two group , such as the swing and time of QRS and the change of ST segment, has no statistical difference (P>0.05) .3. In remote group, there is no significant difference (P<0.01) of the baseline drift of the two; The electrocardiographic parameter of the two group , such as the swing and time of QRS and the change of ST segment, has no statistical difference (P>0.05) .Conclusions: Performance test The sensitivity, accuracy, stability is superior to the standard of electrocardiogram monitor (YY91079-1999) .The system could auto alarm when it receives the exceptional electrocardiosignal, but in the basement ,the time gets long.Clinical researcher 1. In rest state, the baseline stability of measuring instrument and control instrument is lower than the standard of electrocardiogram monitor. The electrocardiogram wave is corresponding. The sensitivity of the change of ST segment of measuring instrument is not inferior to the control instrument. This system could find the usual arrhythmia and the accurate rate of automatic alarm is 100%2. In dynamic state, the baseline stability of two group is lower than the standard of electrocardiogram monitor. The electrocardiogram wave is corresponding. The sensitivity of the change of ST segment of the two group is similar. This system could find the usual arrhythmia correctly.3. In remote monitoring, the baseline stability of two group is lower than the standard of electrocardiogram monitor. The electrocardiogram wave is corresponding. The sensitivity of the change of ST segment of the two group is similar. This system could find the usual arrhythmia correctly.