Welch Allyn Spot Vital Signs Service Manual page 10

Welch Allyn, Inc. Spot Vital Signs Service Manual
Revision A
Rectal temperatures are taken using the (red) rectal probe. In the Normal mode the thermometer's
microprocessor "predicts" body temperature in about 4 seconds for oral temperatures, about 10
seconds for axillary temperatures, and in about 15 seconds for rectal temperatures. The monitor mode
displays the patient's actual temperature after 3 minutes for oral/ rectal mode and 5 minutes for
axillary mode, and will continue to display an updated temperature as long as the probe remains in
place. Temperature readings may be displayed in Fahrenheit or Celsius scales.
Max/Min Temperature Ranges
Temperature Normal Mode
In Normal Mode, the Spot Vital Signs will measure temperature at discrete intervals and then
calculate the rate of change according to a proven algorithm. This allows the thermometer to predict
the end point that the thermistor would reach if it were left in the mouth until it reached mouth
temperature. This predictive feature allows the thermometer to arrive at an accurate oral temperature
reading in approximately 4 seconds.
Normal mode is the default operating mode for the temperature determinations.
Operator selectable patient alarm limits are not available in temperature Normal mode. However,
temperatures that are outside of the operating range of the device will be noted on the temperature
display.
Temperature Monitor Mode
Continuous Monitor Mode operation is normally used when difficult situations prevent accurate
temperatures from being taken in the Normal mode. The probe must be in contact with tissue for at
least three minutes for accurate oral/rectal temperature measurement and five minutes for accurate
axillary temperature measurement. Monitor mode temperatures may not be identical to predicted
'Normal' temperatures because of ambient temperature influence and other factors The trend in
temperature is the important standard to be observed when in the Monitor mode. Operator selectable
patient alarm limits are not available in temperature monitor mode. However, temperatures that are
outside of the normal operating range of the device will be noted on the temperature display.
SpO2 Operating Mode
* The Spot Vital Signs incorporates the Nellcor Puritan Bennett ™ pulse oximetry system which
determines arterial oxyhemoglobin saturation (SpO2 %) by measuring the absorption of red and
infrared light passed through the tissues.
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