Damping of the dynamic pressure amplitude in the ventilatory circuit during high-frequency oscillatory ventilation.
نویسندگان
چکیده
The study deals with experimental measuring of attenuation of dynamic pressure during high-frequency oscillatory ventilation. The experimental circuit consists of high-frequency oscillatory ventilator Sensormedics 3100 B, patient circuit and lung model 5600i. Different values of the flow resistance and alveolar compliance were modelled during the experimental measurement. The ventilatory parameters of the oscillatory ventilator were constant during whole measurement. We confirm a decrease of the amplitude of the pressure swings in the alveolar space during high-frequency oscillatory ventilation. Dependence on the mechanical properties of the respiratory system was found.
منابع مشابه
Effect of Amplitude and Mean Angle of Attack on the Unsteady Surface Pressure of a Pitching Airfoil
Details of pressure distributions, on a two dimensional airfoil oscillating in pitch through stall, in a 0.8 0.8 m low-speed wind tunnel are presented. Pitching occurred about the airfoils quarter-chord axis. Pitch rate, Reynolds number, and oscillation amplitudes were varied to determine the effects on pressure and lift distributions. It was found that mean angle of attack and pitching amplitu...
متن کاملManagement of an infant with diffuse bullous pulmonary lesions using high-frequency oscillatory ventilation.
PURPOSE To describe the anesthetic and ventilatory management of an infant with diffuse pulmonary bullous lesions. CLINICAL FEATURES Four successive operations were scheduled for an infant with diffuse pulmonary bullous lesions. At the age of seven weeks, conventional positive pressure ventilation during laparotomy for intestinal occlusion led to arterial desaturation. This was corrected by r...
متن کاملRecognizing the Need for Mechanical Ventilatory
RECOGNIZING THE NEED FOR MECHANICAL VENTILATORY SUPPORT Clinical Indications for Respiratory Failure Determining Effective Oxygenation and Ventilation GOALS OF NEWBORN AND PEDIATRIC VENTILATORY SUPPORT NONINVASIVE RESPIRATORY SUPPORT Noninvasive Nasal Continuous Positive Airway Pressure in Neonates Noninvasive Positive-Pressure Ventilation in Neonates CPAP and BiPAP in Pediatric Patients CONVEN...
متن کاملRespiratory input impedance during high frequency oscillatory ventilation.
Total respiratory input impedance (Zrs) measured by forced excitation may be computed easily from pressure and flow measurements recorded at the airway opening. The purpose of this paper was to analyse how the information provided by Zrs may be used for monitoring ventilatory mechanics during high frequency oscillatory ventilation (HFOV). We measured impedance (0.125-32 Hz) in six dogs, and in ...
متن کاملPrimate pleuroesophageal tissue barrier frequency response and esophageal pressure waveform bandwidth in health and acute lung injury.
BACKGROUND Dynamic intraesophageal pressure (Pes) is used to estimate intrapleural pressure (Ppl) to calculate lung compliance and resistance. This study investigated the nonhuman primate Ppl-Pes tissue barrier frequency response and the dynamic response requirements of Pes manometers. METHODS In healthy monkeys and monkeys with acute lung injury undergoing ventilation, simultaneous Ppl and P...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Biomedizinische Technik. Biomedical engineering
دوره 57 Suppl 1 شماره
صفحات -
تاریخ انتشار 2012