ECOM Cardiac Output Monitor

An ECOM cardiac output monitor (COM) is a device used to measure the heart’s output. It measures cardiac output by transferring current through the mucosa of the trachea. It uses electrodes placed as close to the ascending aorta as possible to maximize the aortic signal and minimize signals from other vascular structures. The 6-3D tube minimizes signals from other vascular structures, allowing the COM to detect the aortic signal most accurately.

EV 1000(tm)/VolumeView(tm) system from Edwards Lifesciences

The EV 1000(tm)/VolumeView(tm) system from Edwards Healthsciences is a new tool for assessing cardiac output. It can measure global end-diastolic volume and extravascular lung water. The device uses a novel algorithm for thermodilution curve analysis. The objective of the study was to assess the hemodynamic effects of TCM on the patient’s hemodynamics.

Unlike previous vascular imaging systems, this technology does not require an external reference method to calibrate its measurement. The EV 1000(tm)/VolumeView(tm) system has been extensively tested in cirrhotic patients undergoing liver transplantation. The system was inaccurate because the SVR varied and it was difficult to obtain a calibrated arterial waveform. Furthermore, the accuracy of the measurement depends on low vascular tone and high dose vasoconstrictor drugs.

Methods of measurement

A noninvasive cardiac output measurement system must compare its results to a criterion standard method to demonstrate its clinical validity. This process relies on appropriate statistical methods to measure the precision, accuracy, and trending ability of each technology. It is hoped that these studies will result in a uniform definition of clinically acceptable agreement. The following methods of measurement can help in the development of clinically acceptable standards.

LiDCO: Lithium dilution CO. This method requires the use of an endotracheal tube and an arterial catheter. Although not totally noninvasive, this method improves the signal-to-noise ratio. It is also known as thoracic bioreactance. Thoracic impedance is proportional to stroke volume. Consequently, this method is best for patients with stable congestive heart failure, such as those undergoing cardiac surgery.

Signal quality index

ECOM cardiac output monitors are used in cardiac monitoring. However, there are some questions about the accuracy and reproducibility of the results. In this article, we will discuss the accuracy of ECOM, the most popular cardiac output monitor in clinical use. We will also discuss the use of other cardiac index measurements, such as bioreactance. A cardiorespiratory model with a bioreactance-based system could be an interesting option in clinical practice.

The endotracheal cardiac output monitor is an FDA-approved device that provides continuous cardiac index measurement by using a three-dimensional bioimpedance and an arterial catheter. The ECOM was first evaluated in an animal study and showed promising results. However, validation studies have been few and far between. Nevertheless, these studies have included a comparison of ECOM to thermodilution. The ECOM signal quality index was also significantly better than the FloTrac/Vigileo system.


An ECOM is a non-invasive device that measures cardiac index during the PLR. The device is less sensitive than calibrated pulse contour analysis, which provides continuous measurements of the cardiac index under dynamic conditions. However, ECOM is still an excellent tool to predict fluid responsiveness during the PLR and could help in perioperative hemodynamic goal-oriented therapy. But there are some limitations to this device. This article will discuss some of them.

A few limitations of an ECOM include its lack of trending and accurate results. This device only works with intubated patients. Furthermore, the ECOM is not compatible with thermodilution and has inconsistent results. However, it could be helpful for perioperative hemodynamic therapy in cardiac surgery patients. However, more research is needed to fully evaluate ECOM and determine if it is useful in clinical practice. The following table summarizes some of the limitations of ECOM: