['To evaluate the use of prehospital non-invasive ventilation (NIV) in patients with acute exacerbation of chronic obstructive pulmonary disease.', '36 adult patients were treated by prehospital NIV or standard oxygen therapy.', 'Prehospital NIV was described as feasible by the paramedics. Prehospital improvement of respiratory rate and dyspnoea was significantly better and the length of intensive care was significantly lower in NIV patients.'] Does early prehospital use of non-invasive ventilation improve acute respiratory failure in acute exacerbation of chronic obstructive pulmonary disease?