Treaton MV200, Руководство пользователя, Страница: 136 / 222

5.4 Pulse oximetry module
5-12
The "PR and SpO
2
averaging time" parameter is set depending on the patient's mobility and re-
gulates the averaging time of the displayed SpO
2
and PR (standard default value is 16 s, that is
most suitable for restless patients).
The device does not allow to adjust the delay of alarm signal triggering, but allows to adjust av-
eraging time that influences to the delay.
At the minimum averaging time (4 s), the alarm signal triggering will occur earlier with respect to
the parameter change and its crossing the alarm thresholds than at the maximum averaging
time (16 s).
•
Pulse volume is the numerical value of the pulsating component of the measured signal
caused by the pulsation of arterial blood flow. As pulse oximetry is based on the ripple signal,
the pulse volume parameter can be used as the quality indicator for the SpO
2
measurement.
The entire scope of the volume pulse bar corresponds to 10 %. If the pulse volume is 0.3 %
or lower, the bar will turn red, the frame surrounding the bar will blink red, and the display will
show the message "Low pulse signal".
•
Small signal amplitudes are automatically enhanced, so photoplethysmogram always has
approximately the same size, so follow the physiological view of the curve (non-physiological
curves can be recognized by the angular or the toothed form or by the increased noise).
General or local hypothermia, or labored blood circulation in the hand can
lead to instable operation of device and unreliable result of measurement.
To eliminate the violations of local circulation till the press necrosis and to
obtain reliable measurement results reinstall the pulse oximetry
sensor at
least every 4 hours (for children up to one year - every 30 ... 60 minutes).
The sensor wetted by the liquid or with damaged insulation can cause
burns during the use of electrosurgical instruments. Use only dry and fault-
less sensors.
Sensor wire should never lie under the patient to avoid bedsores.
Avoid the falling of the sensor or its cable under the wheels of carts and
other heavy objects to prevent them from damage and failure.
Only pulse oximetry sensors listed in the "Delivery set" section of the cur-
rent Manual can be used with the device. The wavelength of the sensor’s
emitters in the radiation maximum in the red range is 660 nm, in the infrared
range of 905 nm.
The SpO
2
measurement accuracy
•
Sp
О
2
Measuring accuracy in a range 70 - 100 %: ±2 %
• Data update period: 1 s
The SpO
2
measurement accuracy comply with international standard ISO 80601-2-61. Com-
pliance tests were made by using pulse oximetry sensor, reusable, clip, adult RM.501.00.124-
01 and pulse oximetry sensor, reusable, wrap, neonatal RM.501.00.004-01. The measurement