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2 Μαρ 2024 · The ventilator circuit refers to the tubing that connects the ventilator to the patient, as well as any devices that might be connected to the circuit. The basic components of the ventilator circuit and their maintenance are reviewed here.
- Scott Manaker, Md, PhD
The ventilator circuit. Author Dean Hess, RRT, PhD, FAARC,...
- Scott Manaker, Md, PhD
8 Οκτ 2018 · The resistance to flow through a typical ventilator circuit generates a pressure of less than 0.5 cmH2O at 30L/min flow rate. The depicted Fisher & Paykel model generates a pressure of 0.2 kPa (2 cm H 2 O) at a flow of 40L/min .
The ventilator circuit is used to deliver gas from a positive pressure ventilator to the patient. It is typically comprised of tubing that is 22 mm of inside diameter, but can be smaller for neonatal and pediatric circuits.
Therefore a ventilator is a mechanical device that is used to move gas into the lungs by increasing P tp. Positive pressure ventilators create P tp by raising the airway pressure (P aw) above the intrapleural pressure (P pl), whereas negative pressure ventilators create P tp by decreasing P pl below P aw.
The pressure generated within the ventilator can be thought of as the driving pressure that forces the gas into the lungs through the conducting system involving the ventilator circuit and the patient's airways.
In this review, to help readers understand the basic concepts of HMV use, we describe the indications for HMV and the factors that influence successful delivery, including interface, circuits, ventilator accessories, and the ventilator itself.
The act of moving air into and out of the lungs is called breathing, or, more formally, ventilation. The simplest mechanical device we could devise to assist a person’s breathing would be a hand-driven, syringe-type pump that is fitted to the person’s mouth and nose using a mask.
