BIOPAC® Systems, Inc. Logo

Blood Volume

VPG data

Measure variations in blood flow indirectly via changes in opacity with the plethysmogram transducer for tethered, wireless and MRI applications.

Typically, a blood volume pulse (BVP) transducer—otherwise known as a pulseplethysmogram or photoplethysmogram (PPG) transducer—is attached to the finger or toe to record the peripheral pulse. AcqKnowledge® will calculate measurements on a beat-by-beat basis.

PPG (Pulse Plethysmogram) and BVP (Blood Volume Pulse) are two names for very similar measurements. BVP is the signal that results when highpass filtering the PPG signal. The choice of highpass filter is a bit arbitrary, but typically it is a value between 0.05 Hz and 0.5 Hz.

The situation is very similar to EDA. In this case there is tonic EDA which is the entire EDA signal. And the highpass filtered version of tonic EDA is phasic EDA which isolates the specific delta responses at a certain point in time. BVP is metaphorically equivalent to phasic EDA. PPG is similarly equivalent to tonic EDA.

Changes in the PPG baseline are indicative of the overall amount of blood in the capillary bed.

Please note that the VPG (Vaginal Photoplethysmogram) is identical to the PPG but designed to measure capillary blood flow/presence in the vaginal wall.

Details

This is one of many ADVANCED FEATURES for the selected Application. Scroll down for hardware options.

Support

Application Notes

Knowledge Base

Hardware Packages   |   Blood Volume

Hardware Bundles are complete solutions for the specified application. Choose your preferred platform and bundle, then click "Request Pricing" to request an estimate, add/remove items, or complete purchase. If you have questions about specific items, click through to the product web page for details and specifications, or contact your Local Sales contact.

Wired

Wireless

MRI

Animal

Spotlight On
BIOPAC Evoked Response Module

ERS Smart Amplifier

The ERS Evoked Response Smart Amplifier is an extremely low noise differential amplifier that accurately amplifies very small potentials, such as those associated with stimulus/response, startle response, ABR auditory brainstem response, somatosensory evoked response, signal-averaged recordings, and nerve conduction velocity recordings. BIOPAC’s new Smart Amplifiers are designed for great data. Smart Amplifiers improve performance by […]

View All
Latest News

New Citations | BIOPAC in Psychophysiology Research

The mind and body work together in many ways and psychophysiology research provides insight to these connections. BIOPAC has a variety of systems to power your emotion, arousal, stress, cognitive assessment, group interaction, startle, and other psychophysiology research. Here are some recent studies that have used BIOPAC systems for psychophysiological research… Skin conductance, facial EMG, […]

Seenel Imaging and BIOPAC Systems, Inc. Announce a Global Partnership

           For immediate release: January 4, 2023 Amiens, France and GOLETA, California, USA Seenel Imaging SAS and BIOPAC Systems, Inc. have formed a long-term global partnership to distribute MedelOpt®, Seenel Imaging’s groundbreaking wearable neuroimaging device for the neuroscience research market. Seenel Imaging, based in France, continues its international expansion by partnering with BIOPAC Systems, […]

Read All
Request a Demonstration
Request a Demonstration