BIOPAC® Systems, Inc. Logo

Blood Volume

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
free BIOPAC webinar

Enabling Mobile Eye Tracking with Screen-Based Stimuli

Join BIOPAC and Argus Science for a personal look at new Eye Tracking technology for Mobile and Screen-Based Participants. Learn how to utilize ETAnalysis StimTrac combining different types of eye tracking functionality into one tool.

Frazer Findlay from BIOPAC and Robert Wilson from Argus Science will review experiment setup and new safety protocols on how to record Eye Tracking while keeping safe from COVID-19.

Includes setup tips with best practices in the lab environment or in the field, a live demo, and Q&A.

Webinar is LIVE October 28th at 8:00 AM PT.

Register Now
Latest News

Electrocardiography Guide Now Available

BIOPAC’s comprehensive Introductory ECG Guide addresses fundamental to advanced concerns to optimize electrocardiography data recording and analysis. Topics include: ECG Complex; Electrical and Mechanical Sequence of a Heartbeat; Systole and Diastole; Configurations for Lead I, Lead II, Lead III, 6-lead ECG, 12-lead ECG, precordial leads; Ventricular Late Potentials (VLPs); ECG Measurement Tools; Automated Analysis Routines for extracting, […]

New Citations | How Olfaction affects Resting Brain Activity & More!

Smelling your Emotional State Our sense of smell delivers important information to our brains, such as whether or not food is bad, or reminding us of a pleasant memory (crisp, fall air, anyone?). This fMRI-based study recorded PPG using a Photoplethysmograph Transducer for MRI connected to a PPG100C-MRI Amplifier. A differential pressure transducer continuously recorded variations in […]

Read All
Request a Demonstration
Request a Demonstration