NV1 Rhinospirometer

The NV1 Rhinospirometer is a standalone or PC-based Rhinospirometer, developed to measure the partitioning of airflow between the two nasal passages. As the patient breathes in through two nasal adaptors, the volume of air through each side of the nose is measured. A nasal partitioning ratio (NPR) can be easily calculated from the nasal volumes.

The NV1 Rhinospirometer has a number of benefits to the user:

  • Simple to use
  • Small & lightweight
  • Dual volume readings
  • Results independent of subject effort
  • Provides objective measurement of the severity of nasal septal deviation

As the patient breathes in through two nasal adaptors, the volume of air through each side of the nose is measured. A nasal partitioning ratio (NPR) can be easily calculated from the nasal volumes. Clinical work published suggests that NPR values within a range of +/-0.3 are normal while figures greater than that indicate a degree of asymmetry, which may benefit from surgery.

The NVl system can provide facilities for the following applications:

  • Objective measurement of severity of Nasal Septum Deviation
  • Study of Nasal cycle and Rhinitis

Developed in conjunction with the Common Cold Centre Cardiff University, UK.

Dimensions 21x8x15cm
Weight 2kg
Supply Voltage Universal (Free-standing model) / USB (PC Link)
Power Consumption 3 watts
Repeatability > 2% FSD
Volume Accuracy (0–5L) > 3% FSD
Standards BS EN 60601-1: Edition 3.1 plus EMC Edition 4, Class IM, CE Mark
Warmup Time 5 Minutes

Examples of the NV1 reference papers:

  1. M. M. Martin. Treatment success after rhinosurgery: an evaluation of subjective and objective parameters. European Archives of Oto-Rhino-Laryngology 2021.
  2. Cuddihy PJ, Eccles R. The use of nasal spirometry as an objective measure of nasal septal deviation and the effectiveness of septal surgery. Clin Otolaryngol 2003;28(4):325-30.
  3. Cuddihy PJ, Eccles R. The use of nasal spirometry for the assessment of unilateral nasal obstruction associated with changes in posture in healthy subjects and subjects with upper respiratory tract infection. Clin Otolaryngol 2003;28(2):108-11.
  4. Hanif J, Eccles R, Jawad S. The use of a portable spirometer for studies on the nasal cycle. American Journal of Rhinology 2001;15:303-306.
  5. Hanif J, M JSS, R E. Spirometry vs. rhinomanometry for studies on the nasal cycle. Clinical and Experimental Allergy 2001;31(7):28-.
  6. Hanif J, Jawad SS, Eccles R. A study to assess the usefulness of a portable spirometer to quantify the severity of nasal septal deviation. Rhinology 2003;41(1):11-5.
  7. Roblin DG, Eccles R. Normal range for nasal partitioning of airflow determined by nasal spirometry in 100 healthy subjects. Am J Rhinol 2003;17(4):179-83.
  8. Boyce, J.M., & Eccles, R. Assessment of subjective scales for selection of patients for nasal septal surgery. Clin. Otolaryngol. 2006 31, 1-6.
  9. HIPPOKRATIA 2012, 16, 2: 166-169. Lateralized olfactory.

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