User Manual

36 Chapter 3 Patient monitoring Welch Allyn Vital Signs Monitor 300 Series
Monitoring SpO
2
Warnings and cautions — SpO
2
WARNING Disconnect the SpO
2
cable from the monitor before defibrillating the
patient.
WARNING Always follow the manufacturer’s instructions for care and use of the
SpO
2
sensor.
WARNING The accuracy of the SpO
2
measurement can be affected by any of
the following:
• the presence of significant amounts of dysfunctional hemoglobin, such as
carboxyhemoglobin or methemoglobin
• the presence of concentrations of some intravascular dyes, sufficient to
change the patient’s usual arterial pigmentation
• patient movement
• patient conditions such as shivering and smoke inhalation
• painted nails
• poor oxygen perfusion
• anemia or low concentrations of hemoglobin
• hypotension or hypertension
• severe vasoconstriction
• shock or cardiac arrest
• venous pulsations or sudden and significant changes in pulse rate
• proximity to an MRI environment
• moisture in the sensor
• excessive ambient light, especially fluorescent
• wrong sensor or sensor too tight
WARNING If there is any question of the accuracy of an SpO
2
measurement,
verify the measurement using another clinically accepted measurement method.
WARNING Do not use the SpO
2
sensor as an apnea monitor.
WARNING During prolonged, continuous SpO
2
monitoring, check the sensor
site often, in compliance with the sensor manufacturer’s directions. Inspect the
patient’s skin integrity and circulation, and relocate the sensor if necessary.
Tissue damage can result from improper or prolonged sensor attachment.
• Use only sensors and accessories recommended by Welch Allyn.
• Do not use damaged sensors or cables.
• Do not use a sensor with exposed optical components.
• Do not immerse or wet the sensor.