about ppg and AI with Introuction to smartwatch

presentation about ppg

2. Pulse

3. ●Rhythmic expansion and contraction of an artery as blood is forced through it
by the contractions of the heart
○When the heart beats, it pumps blood out into the arteries, and this creates a pressure wave
that travels down the arteries
○This pressure wave causes the arteries to expand and then relax, which is what we feel as a
pulse
●Monitoring the pulse can provide essential information about the heart rate,
rhythm, and overall cardiovascular health
●It's often one of the first things medical professionals check in various
situations.
What is Pulse?

4. ●You can feel your pulse in various locations where arteries are close to the skin and
press against firm tissues
●Common sites:
a.Radial pulse: Located at the wrist on the thumb side. It's one of the most
commonly used sites.
b.Carotid pulse: Located on the neck to the side of the trachea (or windpipe). It's
commonly checked during emergencies.
c.Brachial pulse: Located in the inside of the elbow. This is often used when
measuring blood pressure.
d.Femoral pulse: Located in the groin.
e.Popliteal pulse: Located behind the knee.
f.Dorsalis pedis pulse: Located on the top of the foot.
g.Posterior tibial pulse: Located on the inner side of the ankle.
Pulse in various locations

5. What is Photoplethysmography (PPG)
Photoplethysmography (PPG):
●a non-invasive optical technique used to detect blood volume changes in the
microvascular bed of tissue. It measures the relative change in light intensity
from the absorption of light by blood. Here are some basic concepts and uses
of PPG:
●Principle: A light source illuminates the skin, and a detector, typically a
photodiode, measures the amount of light that is either transmitted through or
reflected off the skin. Blood absorbs light, so as blood volume or flow
changes in the illuminated area, the amount of light reaching the detector also
changes.