الفهرس 
High frequency ventilation and its application in anaethesia and intensive care unit
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Abstract
High frequency ventilation (HFV) is a type of mechanical ventilation that employs very high respiratory rates and very small tidal volumes. The key difference from conventional mechanical ventilation (CMV) is to deliver low tidal vliume which is equal or even less than anotomical dead space in frequencies that are equal or more than 1 hertz (60 cycles per minute). HFV types includes:High frequency positive pressure ventilation (HFPPV), high frequency Jet ventilation (HFJV), High frequency oscillatory ventilation(HFOV) and High frequency percussive ventilation (HFPV). HFJV has many uses in microlaryngoscopic laryngeal surgry rigid bronchoscopy,tracheal and subglottic surgeries. HFJV has a role as ,transtracheal jet ventilation,in alghorythm of difficult airway intubation management. HFOV is an emerging ventilatory strategy for adults that has been used in the neonatal and pediatric population. HFOV has been used as a rescue mode of ventilation in adult patients with severe acute (Adult) respiratory distress syndrome (ARDS) who have failed conventional ventilation (CV). High frequency oscillatory ventilation has the potential to improve outcomes in adults with ARDS