Nellcor OxiMax N-550, Operator'S Manual, Page: 67 / 104

N-550 59
P e r f o r m a n c e C o n s i d e r a t i o n s
WARNING: Pulse oximetry readings and pulse signals can be
affected by certain ambient environmental conditions, sensor
application errors, and certain patient conditions. See the
appropriate sections of the manual for specific safety
information.
Performance Verification
The performance of the N - 550 can be verified by following the
procedures outlined in the Performance Verification section of the
N
- 550 service manual. Qualified service personnel should perform
these procedures before using the monitor for the first time in a
clinical setting.
N-550 Performance Considerations
Certain patient conditions can affect the measurements of the N - 550
and cause the loss of the pulse signal.
Inaccurate measurements can be caused by:
• prolonged patient movement
• venous pulsations
• intravascular dyes, such as indocyanine green or methylene
blue
• defibrillation