photoplethysmogram
Sign in to saveAlso known as Photoplethysmography, photoplethysmography, PPG
A photoplethysmogram (PPG) is an optically obtained plethysmogram that can be used to detect blood volume changes in the microvascular bed of tissue. A PPG is often obtained by using a pulse oximeter which illuminates the skin and measures changes in light absorption. A conventional pulse oximeter monitors the perfusion of blood to the dermis and subcutaneous tissue of the skin. thumb|right|250px|Finger pulse oximeter
Key facts
- Diagnostic.Name
- Photoplethysmography
- Diagnostic.Image
- Image:PPG.PNG
- Diagnostic.Caption
- Representative PPG taken from an ear pulse oximeter. Variation in amplitude are from Respiratory Induced Variation.
- Diagnostic.MeshID
- D017156
via Wikipedia infobox
Research
1,053 papers- Photoplethysmogram Analysis and Applications: An Integrative Review.Frontiers in physiology · 2021
- Assessing hemodynamics from the photoplethysmogram to gain insights into vascular age: a review from VascAgeNet.American journal of physiology. Heart and circulatory physiology · 2022
- Breathing Rate Estimation From the Electrocardiogram and Photoplethysmogram: A Review.IEEE reviews in biomedical engineering · 2018
- Standard terminologies for photoplethysmogram signals.Current cardiology reviews · 2012
- Photoplethysmogram Recording Length: Defining Minimal Length Requirement from Dynamical Characteristics.Sensors (Basel, Switzerland) · 2022
via PubMed
~10 min read
Encyclopedic overview
12 sectionsContents
- Sites for measuring PPG
- Uses
- Monitoring heart rate and cardiac cycle
- Monitoring respiration
- Monitoring depth of anesthesia
- Monitoring hypo- and hypervolemia
- Monitoring blood pressure
- Remote photoplethysmography
- Conventional imaging
- Digital holography
- See also
- References
A photoplethysmogram (PPG) is an optically obtained plethysmogram that can be used to detect blood volume changes in the microvascular bed of tissue. A PPG is often obtained by using a pulse oximeter which illuminates the skin and measures changes in light absorption. A conventional pulse oximeter monitors the perfusion of blood to the dermis and subcutaneous tissue of the skin. thumb|right|250px|Finger pulse oximeter
With each cardiac cycle the heart pumps blood to the periphery. Even though this pressure pulse is somewhat damped by the time it reaches the skin, it is enough to distend the arteries and arterioles in the subcutaneous tissue. If the pulse oximeter is attached without compressing the skin, a pressure pulse can also be seen from the venous plexus, as a small secondary peak.
Excerpted from Wikipedia’s “photoplethysmogram” article, available under the CC BY-SA 4.0 licence.