There are multiple definitions:

1. Nederlandse InternistenVereniging(Dutch)

   • Organizations (clinical)
   • https://www.internisten.nl/

2. noninvasive ventilation(English)

   • refers to the provision of ventilatory support through the patient's upper airway using a mask or similar device. This technique is distinguished from those that bypass the upper airway with a tracheal tube, laryngeal mask, or tracheostomy and are therefore considered invasive
   • COPD, NCROP, HACOR, IMV, VAI
   • Pulmonology, Therapeutic approaches
   • https://doi.org…thorax.57.3.192
   • https://doi.org…1472-6963-9-173
   • https://doi.org…155/2014/538687