Northern Digital Polaris Vicra User Manual page 28

Setting Up the Polaris Vicra System
7. Do not immerse any part of the Polaris Vicra System or allow fluid to enter the equipment.
If fluids enter any part of the system they may damage it and present a risk of personal
injury.
8. Do not sterilize the Polaris Vicra Position Sensor as this may cause irreversible damage to
its components. Reliance on data provided by a damaged Position Sensor may lead to
inaccurate conclusions. If your application involves personal safety, these inaccurate
conclusions increase the possibility of personal injury.
9. Do not use the Position Sensor without inspecting it for cleanliness and damage both
before and during a procedure. Reliance on data provided by an unclean or damaged
Position Sensor may lead to inaccurate conclusions. If your application involves personal
safety, inaccurate conclusions increase the possibility of personal injury.
10. Do not use the Polaris Vicra System for absolute measurements; the system is designed for
relative measurements only. Treating measurements as absolute may result in an incorrect
interpretation of results. If your application involves personal safety, these incorrect
interpretations increase the possibility of personal injury.
11. Do not obstruct the normal flow of air around the Position Sensor (for example, draping
or bagging the Position Sensor). Doing so will affect the Position Sensor's operational
environment, possibly beyond its recommended thresholds. Reliance on data provided by
a Position Sensor that is outside of recommended thresholds may lead to inaccurate
conclusions. If your application involves personal safety, inaccurate conclusions increase
the possibility of personal injury.
Cautions
Caution!
Read the following cautions before using the Polaris Vicra System to prevent the risk of damage to
the system.
1. Make sure that the mains power is disconnected before connecting or disconnecting cables.
Failure to do so may cause damage to the equipment.
2. Always place the Position Sensor on a rigid support system. If not supported, the Position
Sensor may fall which will affect the calibration and damage the Position Sensor.
Operating Environment
• There must be a clear line of sight between the Position Sensor and the tools to be tracked.
The tools must be inside the characterized measurement volume. Refer to
page 27
• Make sure that sources of background IR light in the 800 nm to 1100 nm range (e.g.
sunlight, some operating room lights) are minimized. The Position Sensor is sensitive to IR
light. Since the Position Sensor functions by detecting IR light reflected from, or emitted by,
markers, other sources of IR light can interfere with the Polaris Vicra System.
• Make sure that there are no large reflective surfaces within the field of view (described on
page 26). For example, the gantry for a magnetic resonance imaging (MRI) machine has a
16
for the dimensions of the characterized measurement volume.
Figure 3-2 on
Polaris Vicra User Guide - Revision 2