Description
Peak Nasal Inspiratory Flow (PNIF) Meter
The GM Instruments Peak Nasal Inspiratory Flow (PNIF) Meter is a handheld nasal airflow measurement device used to quickly assess nasal patency and maximum inspiratory flow through the nose. The PNIF meter provides a simple, non-invasive way to measure nasal airflow in litres per minute (L/min).
The PNIF Meter can be used with either a disposable or reusable mask. A single-use disposable mask is included as standard with the unit and is designed to fit a wide range of users.
How the PNIF Meter Works
The Peak Nasal Inspiratory Flow Meter uses a variable-diameter tube calibrated directly in litres per minute (L/min), along with a low-inertia indicator ring. After an inspiratory maneuver, the position of the indicator ring shows the maximum nasal inspiratory flow achieved.
Taking PNIF Measurements
Because results can vary depending on subject effort and the possible effects of nasal valve collapse, multiple measurements should be taken. It is recommended that three readings be performed and that the average measurement be recorded for the subject.
Multiple-Patient Use and Cleaning
When the PNIF Meter is used by multiple subjects, the device can be cleaned between uses. Alternatively, an antiviral filter can be placed between the mask and the PNIF device to help reduce the need for cleaning between subjects. A clean mask should be used for each test.
When the PNIF Meter is used by only one subject, there is no need to change or clean the mask between individual measurements, clean the PNIF device after each use, or use an antiviral filter.
PNIF Meter Specifications
- Accuracy: ±10% of the reading or 10 L/min flow, whichever is greater
- Repeatability: ±5%
- Measurement: Average of 3 readings
- Working Life: Replace after 2 years
Research References
The Peak Nasal Inspiratory Flow Meter has been referenced in published research, including:
- Mo et al. (2020), Laryngoscope, 131:260-267
- Xavier (2024), Facial Plastic Surgery, 49(3):310-313
Please note: This product is not for sale outside the United States.
