Nellcor OXIMAX N-560 Operator's Manual page 80

Performance Considerations
72
• Keep the patient still, if possible
If poor perfusion affects performance, consider using the O
MAX-R sensor; it obtains measurements from the nasal septal anterior
ethmoid artery, an artery supplied by the internal carotid artery. This
sensor may obtain measurements when peripheral perfusion is relatively
poor.
M
XI AX