BIOPAC® Systems, Inc. Logo

Electrical stimulation and artifact

Here are some suggestions for overcoming the problem of stimulation artifact when applying a stimulation voltage to a muscle.
 
  1. Have the ground between the stimulating electrodes and the recording electrodes.
  2. The recording electrodes should be placed orthogonal to the stimulating electrodes.
  3. Apply the highest possible low pass filter on the amplifier. This will allow the amplifier to recover faster.
  4. During analysis, the find peak function should be used to look for EMG activity between the electrical stimuli. For example, if the stimuli are 100 msec apart and it takes 10 msec for the amplifier to recover from the stimulus a find peak from 10 to 99 msec after the interval can be used.

The stimulus artifact may never be removed completely because it is so intense. But this will not be much of an issue since the EMG signal you need for analysis falls between the spikes in the signal caused by the stimulator.

Associated Applications

Associated Disciplines

Spotlight On
Ventilator Validation Kit

Ventilator Validation and Test Equipment

The Ventilator Validation Kit supports new prototype development, existing design validation for production testing, mobile field testing and verification, and other uses where accurate pressure and flow measurements are critical. The Ventilator Validation Kit provides ventilator manufacturers and prototype developers with a complete solution for validating new medical/hospital-grade ventilator products intended for human use. The VVK100-SYS includes […]

View All
Latest News

New Citations | Respiration Analysis and More

Comparing Diaphragm Tissue Between Healthy and Ill Patients The human diaphragm is one of the primary muscles used in respiration, contracting and expanding to control breathing. To measure how much diaphragms move for critically ill patients (in an Intensive Care Unit) compared to diaphragms in a healthy subject, patients at “Papageorgiou” General Hospital in Thessaloniki, […]

BIOPAC Systems Helps STARK Industries Launch VITAL Ventilator for NASA JPL

BIOPAC’s ventilator testing equipment and expertise supports STARK Industries’ effort to manufacture, validate, and test NASA JPL’s VITAL Ventilators Goleta, California – June 16, 2020 BIOPAC Systems, Inc. announced a partnership with STARK Industries, LLC to provide ventilator validation and testing equipment for the mass production of ventilators. STARK Industries was awarded a global license […]

Read All
Request a Demonstration
Request a Demonstration