Welcome to this clear and practical guide on offline FeNO measurement from Sunvou. In this video, we walk you through how offline fractional exhaled nitric oxide (FeNO) testing works and why it matters in clinical respiratory assessment.

First, we introduce the concept of offline FeNO measurement — a method used to collect and analyze exhaled breath samples without real‑time connection to the FeNO analyzer. Instead of measuring NO levels directly during exhalation, the patient breathes into a collection system and the sample is analyzed later. This approach gives clinicians flexibility when online testing isn’t feasible or when sampling in settings where real‑time measurement is difficult.

The video shows step by step how to prepare the sampling bags or containers, how the patient performs the breath collection correctly, and how to secure the sample for later analysis with Sunvou devices. We highlight the correct breathing technique, timing, and sample handling to ensure reliability and accuracy of the collected exhaled nitric oxide.

You’ll see how offline measurement can be especially useful in patients who may have difficulty with traditional online maneuvers or in field settings where immediate analysis isn’t possible. Whether you are working in a busy clinic or conducting respiratory research, mastering offline FeNO sampling broadens your diagnostic toolkit.

By the end of this video, you’ll understand the purpose of offline FeNO, how to perform the technique confidently, and how it fits into overall respiratory inflammation assessment and asthma management.

Sunvou’s training content is designed to support healthcare providers with clear visual instructions and practical knowledge so that FeNO testing can be performed with confidence and consistency.