The NV2 Rhinospirometer allows the measurement of partitioning of airflow between two nasal passages.
This is a unique product developed as a screening instrument, to help clinicians with guidance as to whether a subject presenting with septal deviation is likely/unlikely to benefit from septal surgery. Developed in conjunction with the Common Cold Centre in the University of Cardiff and local hospitals, it measures the ratio of volumes inspired during a single or multiple inhalation (or exhalation). The results are independent of subject effort, as the volume through each nostril is generated by a common negative inspiratory pressure at the back of the nose.
As the patient breathes in through two nasal adaptors, the volume of air, average and peak flow air through each side of the nose is measured. A nasal partitioning ratio (NPR) is calculated from the nasal volumes and reported visually and in tables on screen, print outs and stored for comparison.
The software has been programmed to give guidance based on published work as a ‘Yes’ or ‘No’ to whether the subject is likely/unlikely to benefit. This is displayed at the end of the test, along with the relative volumes, average flow and peak flow readings for each nostril.
Clinical work published suggests that NPR values within a range of +/-0.3 are considered normal while figures greater than this indicate a degree of asymmetry, which may benefit from surgery.
The NV2 system can provide facilities for the following applications:
-Objective measurement of severity of Nasal Septum Deviation
-Study of Nasal cycle and Rhinitis