BIOPAC® Systems, Inc. Logo

Deep breath and PPG signal flattening

Taking a deep breath and then holding it increases intrathoracic pressure (pressure inside the chest cavity), which compresses veins returning blood to the heart causing a temporary decrease in venous return and cardiac output, and in turn, peripheral circulation. The reverse occurs after releasing the breath after a deep inhalation.

Associated Applications

Associated Application Notes

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 Ventilator Validation Kit for Rapid Development & Field Testing

New Ventilator Validation System Allows Device Manufacturers to Test Ventilator Pressure and Volume System supports rapid development and testing of hardware for COVID-19 treatment Goleta, California – March 24, 2020 BIOPAC Systems, Inc. announced a new Ventilator Validation System for engineering and device manufacturers to use when designing and testing new and existing ventilators for […]

New Citations | VR Hazard Training for Astronauts

Space Flight Simulations Prevent Disasters Under psychological and physical stress, astronauts can put their  mission and crew in danger. Looking into this issue, researchers created a potentially catastrophic spaceflight simulation using a virtual reality environment and recorded the heart rate of participants. Psychophysiological responses to the potentially disastrous flight simulation were recorded using a BIOPAC MP […]

Read All
Request a Demonstration
Request a Demonstration