Pulse Oximetry Flashcards
1
Q
absorption of light at two different wavelengths by hemoglobin differs depending on
A
the degree of oxygenation of hemoglobin
2
Q
Pulse oximeters measures what ?
A
- The oxygen saturation of haemoglobin in arterial blood
- pulse rate
3
Q
Three factors that will influence the amount of oxygen delivered to body cells:
A
-Tissue perfusion
-The amount of
hemoglobin
-The saturation of hemoglobin by oxygen.
4
Q
Oximeters consist of:
A
- peripheral probe
- a microprocessor unit
- an audible pulse tone
5
Q
How does an oximeter work?
A source of light originates from the probe at two wavelengths, what are they ?
A
(650nm and 805nm).
6
Q
When might a pulse oximeter not work ?
A
- Sluggish flow
- hypovolemia
- vasoconstriction
7
Q
Pulse oximeter is generally measured on ?
A
- fingers
- earlobe
- infants - bridge of nose
8
Q
Pulse oximeter is affected by ?
A
- ambient light;
- shivering;
- abnormal
- hemoglobins;
- pulse rate and rhythm;
- vasoconstriction
- cardiac function.
