NPi-300 Pupillometer

• Technical data:
  Infrared camera with light stimulus provided by LED lamps. Contactless inductive charging of the Li-ion battery.
• MDD classification:
  Class 1 LED product in accordance with IEC 60825.
• Measurement:

  During the automated measurement, a total of 90 images are captured within 3 seconds. Measurement accuracy: +/- 0.03 mm.

  The measurement result is displayed on the screen and saved on the SmartGuard. The data can be read out with a SmartGuard Reader and saved in a table as preparation for the PDMS.

Measured parameters:

• NPi:

  Neurological Pupil index
• MAX:

  Pupil diameter before light stimulus in mm
• MIN:

  Smallest measured pupil diameter in mm
• % CH:

  Percentage change in pupil size in %
• CV:

  Average constriction velocity in mm/s
• MCV:

  Maximum constriction velocity in mm/s
• LAT:

  Time delay until reaction to light stimulus occurs in s
• DV:

  Dilation velocity in mm/s

Evaluation of the NPi

• 3,0 – 4,9:

  Normal pupillary response
• < 3,0:

  Abnormal pupillary response*
• 0:

  Non-reactive or atypical pupillary response

*A difference in NPi between the right and left pupils of ≥ 0.7 may also be considered an abnormal pupil reading.