Persistent clinical demand and recent industrial developments show that High Frequency Ventilation is well established, although the method was introduced prematurely into clinical use, with incomplete knowledge, primitive instrumental development and inadequate monitoring standards. The confusion [1-6] in the literature regarding the clinical use of high frequency ventilation and its merits in...

We thought it was impossible. Physiological principles maintained that ventilation at tidal volumes less than the anatomical deadspace should be ineffective (i.e., inspired air not reaching the alveolae). Data from a 1980 study dispelled that myth, showing unequivocally that ventilation with tidal volumes as small as 20 to 30 ml in dogs, a mere fraction of the anatomical deadspace, could mainta...

OBJECTIVE To determine the safety, feasibility, and lung-recruitment efficacy of an explicit ventilation protocol combining high-frequency oscillatory ventilation and recruitment maneuvers. DESIGN Prospective, multiple-center, single-intervention pilot study. SETTING Four university-affiliated intensive care units. PATIENTS Twenty-five patients with early acute respiratory distress syndro...

Treatment of acute respiratory failure is still a hot issue in intensive care everyday practice: in the last few years high frequency ventilation techniques have been employed as a therapy for adult respiratory distress syndrome (ARDS) and acute respiratory failure (ARF). We applied high frequency percussive ventilation (HFPV) to 3 patients affected by ARDS or ARF, who did not improve after 24 ...

We have compared three types of high frequency jet ventilation (HFJV) with conventional positive pressure ventilation in patients recovering from elective coronary artery bypass surgery. Twelve patients were allocated randomly to receive HFJV at ventilatory frequencies of 60, 100, 150 and 200 bpm from a standard jet ventilator at either the proximal or distal airway (HFJV.p and HFJV.d), or from...

BACKGROUND We were concerned about the risk of inadequate humidification during high-frequency percussive ventilation (HFPV). METHODS We studied 5 humidifiers during HFPV with a lung model, at bias gas flows of 10 L/min, 30 L/min, and 50 L/min, and compared the results to those from a comparator ventilator/humidifier setup and to the minimum temperature (30 degrees C) and humidity (30 mg/L) [...

TOPIC: Critical Care TYPE: Medical Student/Resident Case Reports INTRODUCTION: High frequency percussive ventilation (HFPV) is a method of that delivers biphasic microvolumes in time-cycled, pressure limited fashion. The goal to increase recruitment alveoli burdened by secretions or atelectasis improve gas exchange for those failing conventional ventilation. HFPV has been utilized the acute inh...