Description

The nasal partition data (NPR) can be used to compare the symmetry to air flow between the left and right nostril.


Parameter:

(1) measure of airflow through the left nostril

(2) measure of airflow through the right nostril

 

Airflow can be measured:

(1) nasal spirometry or rhinomanometry

(2) qualitative by scale (for example from 0 to 10)

 

nasal partitioning ratio =

= ((flow through left nostril) - (flow through right nostril)) / ((flow through left nostril) + (flow through right nostril))

 

Interpretation:

• minimum score: -1

• maximum score: +1

• Symmetrical airflow has an NPR of 0.

• Maximal flow in the left nostril with no flow in the right has an NPR of +1.

• Maximal flow in the right nostril with no flow in the left has an NPR of -1.

 

Limitations:

• The NPR does not define how normal airflow is through the left or right nostril. This would be a additional information that needs to be specified, especially if comparing pre- and post-procedural change.


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