This case study showcases the real-world impact of FeNO testing in asthma care, focusing on the Bedfont® NObreath® FeNO device and its role in improving clinical decision-making. Led by Carol Stonham MBE, Respiratory Specialist Nurse and respected clinical leader, the study highlights the device’s ease of use, suitability for all ages, portability, and reliability in busy practice settings. Carol shares practical examples of how FeNO testing helped patients understand their inflammation levels, improve inhaler technique, and achieve better asthma control. This document demonstrates why the NObreath® device is a trusted, cost-effective solution for enhancing asthma diagnosis and ongoing management across primary care.