![]() ![]() These values were significantly lower and less variable than measurements obtained by water displacement.Ĭomputerized techniques provide an innovative and relatively simple way of accurately measuring the VD of face masks applied to digital faces. VD varied between 22.6 mL (SootherMask, InspiRx) and 43.1 mL (Vortex, Pari) for small masks and between 41.7 mL (SootherMask) and 71.5 mL (AeroChamber, Monaghan Medical) for medium masks. Each mask was electronically applied to its respective digital face, and the VD enclosed (mL) was computerized and precisely measured. Commonly used face masks (small and medium) from various manufacturers (Monaghan Medical, Pari Respiratory Equipment, Philips Respironics, and InspiRx) were scanned and digitized by means of computed tomography. The aim of this study was to develop an accurate and reliable way to measure VD electronically and to apply this technique by comparing the electronic VD of commonly available face masks.Īverage digital faces were obtained from 3-dimensional images of 270 infants and children. Because, in real life, masks are placed against the face, VD is likely to differ considerably between masks depending upon their contour and fit. Data about VD have been traditionally obtained from water displacement measurements, in which masks are held against a flat surface. The dead-space volume (VD) of face masks for metered-dose inhaler treatments is particularly important in infants and young children with asthma, who have relatively low tidal volumes. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |