The Evermind sensor may be used on select medical equipment to do more than simply track if the device is on or off, and can detect device usage. The Evermind sensor may be paired with a Trilogy Ventilator (for example) to monitor when the device is in "Therapy Mode," or being used for breathing versus simply being on or charging.

The way this is done is by tracking current draw. The ventilator will pull more current when being used to support breathing. By interpreting that draw we are able to detect in real time when a trilogy is in use.  

There is a normal "tuning" process when a new device is plugged into our sensor where we reduce any "noise" on the circuit and can also apply a custom filter to account for variations in power draw if the device requires it (such as the difference between therapy mode and standby mode). You may see irregularities in the reporting chart for the first couple of weeks while we go through this process.  It is important to keep using the equipment as normal while we make any necessary adjustments.  

More about “noise:”

Since we are depending on current draw, there are factors which can result in adding “noise” to the signal and make it more difficult to translate the usage. These may include:

  • Distance from a cell tower may force the modem to draw more power

  • Additional appliances plugged in on the same circuit

  • the way a patient’s home is wired


Figure 1: A usage graph of a sensor that needs to be "tuned."

Figure 2: This view makes it easy to discern the "signal" through the "noise" and see when the device is "in use." The tuning process will raise threshold (red line) to reduce the noise on the usage graph.

A common result of excessive noise is a graph which shows many bursts of intermittent usage. This is due to the current draw falling outside of the normal configured parameters. It is easily fixable by custom configuring - or tuning - the sensor for the environment.

If you are seeing intermittent behavior, tell us in a support ticket and we will promptly tune your system.  Filling out a customer support ticket when you see an anomaly will help us address the issue more quickly and has the following benefits:

  • helps our tech team to better address the specific issue

  • pulls in the device data we need

  • protects patient privacy by obfuscating PHI. (more info here)

Figure 3: After tuning, the threshold has been raised

Figure 4: The Usage graph after tuning.

Troubleshooting Tips:

  1. Make sure the device’s internal clock is correct before assuming the Evermind usage graph is inconsistent.
  2. If you have questions about the Evermind Sensor may monitor a  particular brand or device, please contact us. We can work with you to refine our filters to correctly track device usage for your specific need.
  3. Using duration notifications rather than inactivity notifications will avoid flagging errors with those intermittent bursts of power.  The flagging system will recognize those short bursts as usage and won’t initiate a flag for inactivity.  However, if you set up a duration notification (looking for minimum hours of usage in order to flag a system) the quick bursts won’t make much of a difference and the flagging will be more meaningful.