Independent Noise Test With CIS Model 6
Signal Noise Reduction on Electrophysiology Amplifier utilizing Clear Image Scientific Model 6
-- Test Conducted at Deborah Heart And Lung, Browns Mills NJ.
Participants: Pedram Kazemian MD FACC, Raffaele Corbisiero MD FACC, George Giacono RN, Gary Chamberlain REMS, David Muller RN.
Background: Noise on intracardiac recording systems has been a consistent problem since the inception of Electrophysiology Labs. External environmental sources and equipment is often a source of noise due to RFI and EMI emission. Isolating equipment is difficult due to the wide variety of equipment used during a range of different procedures.
Objective: We compared signal quality with and without the use of the Clear Image Scientific Model 6 to compare noise in a real-world setting (CIS inc. is located Poulsbo, WA).
Methods: After witnessing a consistent reduction in noise when using the CIS Model 6 over a period of time, we recorded a patient undergoing an RF ablation with catheters in place. The signal noise amplitude was recorded on both surface and intracardiac electrogram (EGM)s with the CIS Model 6 in place. With catheters in still in place, the amplifier was rebooted after the CIS M6 was removed and the measurements were repeated with the amplifier plugged into a common outlet.
Results: With the CIS Model 6 in place, surface ECG baseline noise amplitude was measured at 0.009 with the gain/filter Low/High/Notch set to 128/1Hz/25Hz/60Hz respectively and for the EGMs 0.010 with the gain/filter Low/High/Notch set to 128/30Hz/250Hz/60Hz respectively. Upon repeating without the CIS Model 6, ECG baseline noise amplitude was measured at 0.022 with the gain/filter Low/High/Notch set to 128/1Hz/25Hz/60Hz respectively and for the EGMs 0.016 with the gain/filter Low/High/Notch set to 128/30Hz/250Hz/60Hz respectively.
Conclusion: The CIS Model 6 reduced baseline noise by 144% on the Surface and 37% on the EGM.
Results - left with CIS Model 6, right without