DARAY V409, Руководство пользователя, Страница: 9 / 17

9
NOTE
 Make sure to place the device on the finger in a correct direction. The LED part of the
sensor should he at the backside of the patient hand and the photodetector part at
the inside. Make sure to insert the finger to a suitable depth into the sensor so that
the fingernail is just opposite to the light emitted from the sensor.
 To acquire accurate results, please read data until the device is steadily placed.
Measurement Limitations
If the accuracy of any measurement does not seem reasonable, first check the patient's vital
signs by an alternate method. Then check the instrument for proper function.
Inaccurate measurements may be caused by:

High-frequency electrical noise, such as noise from electrosurgical apparatus connected
to the system;

Significant levels of dysfunctional hemoglobins (e.g., carboxyhemoglobin or
methemoglobin);

Significant concentrations of dysfunctional hemoglobin, such as carboxyhemoglobin and
methemoglobin; itravascular dyes such as indocyanine green or methylene blue;

Exposure to excessive illumination, such as surgical lamps (especially ones with a xenon
light source), bilirubin lamps, fluorescent lights, infrared heating lamps, or direct sunlight
(exposure to excessive illumination can be corrected by covering the device with a dark
material);

Excessive patient motion;

Venous pulsations;

SpO2 is too low;

Improper position of the finger inserted into the device;
 Placement of the device on the same extremity with a blood pressure cuff, arterial
catheter, or intravascular line.
 Loss of pulse signal can occur in the following situation:

The device clip is too tight;

There is excessive illumination from light sources such as a surgical lamp, a bilirubin
lamp, or sunlight;

A blood pressure cuff is inflated on the same extremity as the one with the device
attached:

The patient has hypotension, severe vasoconstriction, severe anaemia. or hypothermia;

There is arterial occlusion proximal to the device;

The patient is in cardiac arrest or in shock.
Precautions
WARNING

Check if the device is in normal condition before monitoring. Do not use the device
once it is found damage.

Remove the device from the patient after measurement.

Do not put the device on extremities with arterial catheter or venous syringe.

The device can not be clipped on the oedema and tender tissue.
 If no pulse is found or the reading is unreasonable, first check the patient 's condition,
and then check the device placement on the finger, finally consult a qualified
engineer to check the device for correct function.
 Don't use the device to measure patients whose pulse rate is lower than 30bpm,
which may cause incorrect results.
 The device is not appropriate for the ceaseless monitoring of the patients. Prolonged
and continuous monitoring may increase jeopardy of unexpected change of dermal
condition such as abnormal sensitivity, ruhescence, vesicle, repressive putrescence,
and so on. The uncomfortable or painful feeling may appear if using the device