Mindray PM-60Vet, Operator'S Manual

Page: 55 / 96

6-5
To set the SpO
2
sensitivity,
1. Select [
Menu
] → [
General Setup
].
2. Set [
Sensitivity
] to [
High
], [
Med
] or [
Low
], whose averaging time is respectively
7 seconds, 9 seconds and 11 seconds.
6.5 Measurement Limitations
If you doubt the SpO
2
measurements, check the animal’s vital signs first. Then check the
pulse oximeter and SpO2 sensor. The following factors may influence the accuracy of
measurements:
„ Ambient light
„ Physical movement (animal or imposed motion)
„ Diagnostic testing
„
Low perfusion
„ Electromagnetic interference, such as MRI environment
„ Electrosurgical units
„ Dysfunctional haemoglobin, such as carboxyhemoglobin (COHb)and
methemoglobin (MetHb)
„ Presence of certain dyes, such as methylene and indigo carmine
„ Inappropriate positioning of the SpO2 sensor, or use of incorrect SpO2
„
Drop of arterial blood flow to unmeaurable level due to shock, anemia, low
temperature or vasoconstrictor.