2. INTRODUCTION
The first oximeter was introduced by
Karl Matthews –in the year 1935.
First oximeter to measure O2
saturation.
Dr.Takuo Aoyagi (1972)
Pulsatile changes in absorption of
red and infra-red light to measure
arterial oxygen saturation.
3. PULSE- OXIMETER
A pulse-oximeter measures the
amount of saturated oxygen in blood.
It is a non-invasive method.
It depends on The combination of
both Beer’s Law and Lambert’s Law.
4. BEER-LAMBERT LAW
The combination of both Beer’s Law and
Lambert’s Law
Beer-Lambert’s Law– The absorption of
light is proportional to the concentration
and thickness of the sample.
7. PRINCIPLES
Pulse oximetry is based on the differential
absorption of light by oxyhemoglobin and
deoxyhemoglobin.
The oxygenated blood absorbs red light
while the deoxygenated blood absorbs
infrared light.
13. FACTORS EFFECTING THE PULSE
OXIMETER READING
Major body motion .
Blood flow blocked due to pressure on arms
or fingers .
Probe attached incorrectly .
Excessive ambient light (panel lamp,
fluorescent lamp, infrared heating lamp,
direct sunlight, etc.)
14. PURPOSE OF THE PULSE
OXIMETER
Screening for sleep apnea syndrome.
Hospitalization of patients with chronic
respiration diseases.
If a patient’s blood oxygenation is
unstable.
Home oxygen therapy.