V Series Operating Instructions 15 - 7
Pulse Oximetry (SpO2) Measuring SpO2
15.3 Measuring SpO
2
15.3.1 Taking an SpO
2
Measurement
1. Select the appropriate sensor for the patient.
2. Attach the SpO
2
sensor to the patient’s finger or other appropriate site.
3. Attach the SpO
2
patient cable to the sensor and plug the other end of the patient cable into the
SpO
2
connector (as shown in FIGURE 15-1 on page 15-2).
4. The SpO
2
measurement displays when the V 12/V 21 detects that the sensor is connected to
the patient. A pleth waveform displays to the left of the SpO
2
digital tile, provided the SpO
2
parameter is part of the Display Setup.
CAUTION: Tissue damage or inaccurate measurements may be caused by incorrect
SpO2 sensor application or use, such as wrapping too tightly, applying
supplemental tape, failing to inspect the sensor site periodically, or
failing to position appropriately. Carefully read the sensor directions
for use, the V 12/V 21 Operating Instructions, and all precautionary
information before use.
CAUTION: Inaccurate SpO2 measurements may be caused by:
• Incorrect sensor application or use
• Significant levels of dysfunctional hemoglobins, (e.g.,
carboxyhemoglobin or methemoglobin)
• Intra-vascular 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 excessive ambient
light. In such cases, cover the sensor site with opaque material
•Venous pulsations
•Electro-surgical interference
• Placement of a sensor on an extremity that has a blood pressure
cuff, arterial catheter, or intra-vascular line
• Nail polish or fungus
CAUTION: Prolonged and continuous monitoring may increase the risk of skin
erosion and pressure necrosis at the site of the sensor. Check the SpO2
sensor site frequently to ensure proper positioning, alignment and skin
integrity at least every eight (8) hours; with the Adult and Pediatric re-
usable finger sensor, check every four (4) hours; for neonates and
patients of poor perfusion or with skin sensitive to light, check every 2 -
3 hours; more frequent examinations may be required for different
patients. Change the sensor site if signs of circulatory compromise
occur.
CAUTION: Many patients suffer from poor peripheral perfusion due to
hypothermia, hypovolemia, severe vasoconstriction, reduced cardiac
output, etc. These symptoms may cause a loss in vital sign readings.
CAUTION: When cleaning SpO2 sensors, do not use excessive amounts of liquid.
Wipe the sensor surface with a soft cloth, dampened with cleaning
solution. Do not attempt to sterilize.
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