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- Q7187885 subject Q8229500.
- Q7187885 abstract "A photoplethysmogram (PPG) is an optically obtained plethysmogram, a volumetric measurement of an organ. 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.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.The change in volume caused by the pressure pulse is detected by illuminating the skin with the light from a light-emitting diode (LED) and then measuring the amount of light either transmitted or reflected to a photodiode. Each cardiac cycle appears as a peak, as seen in the figure. Because blood flow to the skin can be modulated by multiple other physiological systems, the PPG can also be used to monitor breathing, hypovolemia, and other circulatory conditions. Additionally, the shape of the PPG waveform differs from subject to subject, and varies with the location and manner in which the pulse oximeter is attached.".
- Q7187885 thumbnail PPG.PNG?width=300.
- Q7187885 wikiPageExternalLink pulsecapture.
- Q7187885 wikiPageExternalLink E72Cardio.html.
- Q7187885 wikiPageExternalLink www.whatsmyheartrate.com.
- Q7187885 wikiPageWikiLink Q1036696.
- Q7187885 wikiPageWikiLink Q1074.
- Q7187885 wikiPageWikiLink Q1140495.
- Q7187885 wikiPageWikiLink Q1320276.
- Q7187885 wikiPageWikiLink Q1642137.
- Q7187885 wikiPageWikiLink Q17001407.
- Q7187885 wikiPageWikiLink Q173710.
- Q7187885 wikiPageWikiLink Q181277.
- Q7187885 wikiPageWikiLink Q25504.
- Q7187885 wikiPageWikiLink Q257319.
- Q7187885 wikiPageWikiLink Q500634.
- Q7187885 wikiPageWikiLink Q56002.
- Q7187885 wikiPageWikiLink Q6554101.
- Q7187885 wikiPageWikiLink Q7908504.
- Q7187885 wikiPageWikiLink Q8229500.
- Q7187885 wikiPageWikiLink Q82642.
- Q7187885 wikiPageWikiLink Q840646.
- Q7187885 wikiPageWikiLink Q848662.
- Q7187885 comment "A photoplethysmogram (PPG) is an optically obtained plethysmogram, a volumetric measurement of an organ. 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.With each cardiac cycle the heart pumps blood to the periphery.".
- Q7187885 label "Photoplethysmogram".
- Q7187885 depiction PPG.PNG.