Dear Editor,

We read Katherine Margaret Bergs and co-authors' review on non-invasive ventilation (NIV) with great interest [1]. The authors focus on NIV in a hospital setting. As an amendment to this review, we would like to draw attention to the fact that NIV has successfully crossed the border to prehospital use in the past few years. NIV is increasingly being used for the treatment of severe respiratory distress in prehospital settings [2]. This technique has even been used successfully in medical emergencies in really remote places at high altitude in mountain medicine [3, 4]. We think the prehospital use of NIV deserves growing interest.