Welcome to the Sunvou FnNO Nasal FeNO Test tutorial — your step‑by‑step guide to measuring nasal fractional exhaled nitric oxide (FnNO) from the upper airways with precision and confidence. This video shows how to correctly prepare, perform, and interpret the nasal FeNO test using Sunvou testing equipment, designed for clinical settings.

First, the video introduces the purpose of the nasal FeNO measurement: assessing inflammation in the upper respiratory tract through exhaled nitric oxide levels. FnNO testing provides valuable insights into nasal and sinus inflammatory status and complements lower airway FeNO testing for a complete airway assessment.

Before beginning, ensure the device is calibrated and ready. The presenter outlines how to set up the nasal sampling port and connection tubing, emphasizing clean and secure attachments. A cooperating patient is seated comfortably with head slightly tilted. The clinician instructs the patient on the correct posture and breathing technique to achieve stable nasal airflow suitable for accurate FnNO detection.

As the procedure begins, the patient gently breathes through the nose into the sampling interface, following on‑screen prompts for timing and flow control. The video demonstrates how to maintain consistent nasal exhalation against resistance to isolate upper airway nitric oxide. Throughout the recording, clear graphics show the real‑time FnNO values on the device screen and how to recognize a valid recording.

Finally, the video covers how to save the measurement, interpret the numeric results, and proceed with clinical decision‑making based on FnNO levels. Following this structured Artery to ensure reliable data collection and enhance respiratory inflammation evaluation in your practice.

If you’d like additional video guidance on other FeNO tests — from offline sampling to alveolar and bronchial measurements — explore the rest of our Sunvou tutorials online.