The waveforms that can be generated in high-frequency oscillatory ventilation (HFOV) versus high-frequency percussive ventilation (HFPV). With HFPV, small volumes are delivered in a stepwise manner with scheduled interruptions that result in the formation of high- and low-frequency cycles. It has crudely been described as an amalgam of HFOV and pressure-controlled breaths into one. Source: Ventilator Technology and Management, Critical Care Citation: Oropello JM, Pastores SM, Kvetan V. Critical Care; 2016 Available at: http://accessmedicine.mhmedical.com/DownloadImage.aspx?image=/data/books/1944/oropelloccm_ch18_f012.png&sec=143934592&BookID=1944&ChapterSecID=143516729&imagename= Accessed: December 24, 2017 Copyright © 2017 McGraw-Hill Education. All rights reserved