3
Introduction
The NONIN 8500AV Veterinary Pulse Oximeter continuously monitors arterial hemoglobin oxygen saturation and
pulse rate. Its intended application is monitoring animals.
The Model 8500AV Oximeter is intended for spot-checking and displaying numerical values for arterial oxyhemoglobin
saturation and pulse rate.
The Model 8500AV Oximeter is small (3.0"W x 6"H x 1"D) and lightweight (10 oz. – 280 gm). It will typically operate
for 100 hours continuously between battery replacements.
The Model 8500AV determines arterial oxyhemoglobin saturation (%SpO
2
) by measuring the absorption of red and
infrared light passed through the tissue. Changes in light absorption caused by pulsation of blood in the vascular bed are
used to determine arterial saturation and pulse rate. The Model 8500AV requires no routine calibration or maintenance.
Oxygen saturation and heart rate are displayed on light emitting diode (LED) digital displays. On each detected pulse,
the perfusion LED flashes. Patient perfusion signals are graded as good, marginal, or inadequate and are indicated as
such by the LED changing color from green to yellow or red. This simple method gives the user a pulse by pulse visual
indication of waveform signal quality without requiring the user to perform complex waveform analysis during critical
patient care situations.
Sensor disconnect or malfunction is indicated by lack of good perfusion flashes and/or a minus (-) sign to the left of the
SpO
2
value on the LED display. Ultimately, if good perfusion pulses are not received, the SpO
2
and Pulse Rate
numerical will be replaced by dashes. When the batteries are low, the digital displays will blink.