What is a normal NPi?

The Neurological Pupil index (NPi®), calculated by the Pupillometer, reflects a comparison of all measured variables in the PLR to known normal observations. On the numeric NPi® scale, an NPi® from 3.0 to 4.9 is considered normal, while an NPi® less than 3.0 is considered abnormal.

What does low NPi mean?

Interpreting the NPi An NPi score below 3 means the reflex is abnormal, i.e., weaker than a normal pupil response, and values closer to 0 are more abnormal than values closer to 3.

What does sluggish pupil reaction mean?

A sluggish or slow pupillary response may. indicate increased ICP, and nonreactive pupils are. often associated with severe increases in ICP and/or. severe brain damage. A complete pupillary reactivity examination also.

When would you use a pupillometer?

In the most common sense, a pupilometer is a tool for measuring pupillary distance (PD). It is used for fitting eyeglasses so that the lenses are centered in the visual axis.

What is NPi number on pupilometer?

Automated pupillometer using the Neuroptics® NPi 200-pupillometer provides a precise measure of the constriction velocity (CV), latency, dilation velocity, size, percent change, and a Neurological Pupil indexTM (NPi). The NPi is a scaled value that is based on a model of normal pupilometer values1.

What does NPi mean in Pupillometer?

Neurological Pupil indexTM
Automated pupillometer using the Neuroptics® NPi 200-pupillometer provides a precise measure of the constriction velocity (CV), latency, dilation velocity, size, percent change, and a Neurological Pupil indexTM (NPi). The NPi is a scaled value that is based on a model of normal pupilometer values1.

Does fixed and dilated pupils mean death?

They stated that both pupils must be fixed and lack a light reflex and that the diameter should be ≥4 mm to qualify as brain death. According to the worldwide diagnostic criteria for brain death in adults12 and children,8 both pupils must be fixed in the midposition and light reflexes must be absent.

What does NPi mean in pupillometer?

How accurate is pupillometer?

The most consistent and accurate measurements of PD were achieved with PD 65 mm. The average error in mean value of the measurements for all PD’s, was 2.3 mm, and the average of the standard deviation in our measurements, was 0.26 mm.

What your pupil size says about you?

We found that a larger baseline pupil size was correlated with greater fluid intelligence, attention control and, to a lesser degree, working memory capacity—indicating a fascinating relationship between the brain and eye.