FAQ

Is Electrical Cardiometry the same thing as bioimpedance and impedance cardiography?

Yes and no. Bioimpedance refers to measuring the changes in conductance or impedance of the thorax from an applied current. Electrical Cardiometry (EC) is a method of bioimpedance with a newly designed algorithm and model that differs from traditional impedance. Impedance cardiography is an older method of bioimpedance which focuses on the changes in conductivity due to the volumetric expansions of the aorta. EC derives stroke volume from conductance of the blood (mainly due to the change in orientation of the red blood cells) in the aorta. Currently, Cardiotronic’s EC Monitors are the only bioimpedance-based technology that is FDA approved for age ranges of the patient population and has been validated against the gold standard, thermodilution, as well as direct Fick and Doppler in children and adults.

Does Electrical Cardiometry measures the amplitude of the voltage change across the thorax and not the phase shift?

Electrical Cardiometry utilizes both the amplitude and the phase shift of the voltage change across the thorax to determine the measurement of impedance. Utilizing both these signals, we plot a conductivity (dZ) waveform to obtain a peak acceleration of the change in conductivity (dZ/dT max). The peak acceleration is then attributed to a mean blood velocity using Cardiotronic’s proprietary algorithm (Bernstein-Osypka equation).

Read more about Electrical Cardiometry.

Will the signal sent by the EC monitors interfere with external pacemakers?

No, EC monitors can detect the electrical stimulation of the pacemakers and are able to distinguish pacemaker stimulation from intrinsic activity. In addition, EC Monitors have the ability to sync with Cardiotronic Temporary Pacemakers for CRT optimization.

Does the system need to be calibrated manually?

The EC monitors are self-calibrating and do not need any type of manual calibration from the user.

Can the monitors interface with my patient monitoring system (Phillips, GE, Spacelabs, etc)?

Unfortunately, at this time the EC Monitors are able interface with the Phillips monitors and Somanetics Vital Sync Tower. We are currently working with GE to bring more interfaces.

Is my EMR program able to pull the measurements of Cardiac Output from the EC monitors?

EMR is able to pull the parameters measured by the AESCULON & ICON by interfacing with the Phillips VueLink Module. If your institution uses a Phillips patient monitoring system which is networked with an EMR system your electronic records will be able to pull the data from the Phillips Monitor. Cardiotronic can also work with your hospital’s biomedical department to develop individual EMR interfaces using the monitor’s (RS232) serial port to pull measurements into the EMR system.

What is the minimum patient weight for EC Monitors?

The lowest weight EC Monitors can measure is 500 grams.

What kind of pricing options do I have?

Cardiotronic provides many different kinds of pricing options for the use of the AESCULON and ICON. Depending on the situation regarding the budget of specific hospitals, Cardiotronic is flexible and able to figure out a solution that will allow you to use the technology in your practice.

I would like to use your monitor for research. What should I do?

Cardiotronic is always looking for research opportunities that will lead to the improvement of healthcare around the world. If you have any questions in regards to research, please contact us and we will send you a research registration form!

What are the limitations of the EC Monitors?

While the EC Monitors are the most robust on the market, they have a few limitations that clinicians should understand in order to optimize the effectiveness of the monitors. The monitor will not work during open chest surgery, but works properly before and after the operation when the chest is closed. Electrical surgical units, or Bovie instruments, interfere with the EC Monitor signal. In order to mitigate these limitations, the EC Monitors have a signal quality indicator (SQI) which is similar to your standard cell phone reception bar. The SQI is able to tell the user the quality of the signal they are receiving and the monitors will not output any new parameters based on a poor signal.

How accurate are the EC Monitors?

Cardiotronic’s EC Monitors (ICON & AESCULON) have been validated against the gold standard of measuring cardiac output, thermodilution, as well as Direct Fick with oxygen consumption measured, transesophageal and transthoracic echocardiogram.

How do you use the EC Monitors?

The monitors are extremely easy to use and do not require a trained professional to setup and record hemodynamic measurements. Four iSense skin sensors are placed on the patient, a pair on the neck (either left or right side) and the second pair on the left side of the thorax. Using the patient cable, the sensors are connected to the device. The patient’s height, weight, gender and age are then inputed into the device and lastly, the measure button is pressed. In less than 30 seconds, the user will have access to an extensive list of hemodynamic parameters, such as stoke volume and cardiac output.