Reducing Valve (Anesthesia) PDF
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Uploaded by AstonishingSunflower
Al-Nukhba University College
Dr.Lina A.Ridha
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Summary
This document explains pressure regulators, also known as reducing valves, used in anesthesia. It details the components, mechanism of action, and potential problems such as ice formation and diaphragm rupture. The document presents a comprehensive overview of this crucial medical equipment.
Full Transcript
# المرحلة الثانية المحاضرة رقم 16 صمام خافض و منظم الضغط\د. لینا احمد (شهادة البورد الدكتورا في التخدير و العناية المركزة) ## Pressure regulator (reducing valve) Pressure regulators are used because: 1. Gas and vapour are stored under high pressure in cylinders. A regulator reduces the variable...
# المرحلة الثانية المحاضرة رقم 16 صمام خافض و منظم الضغط\د. لینا احمد (شهادة البورد الدكتورا في التخدير و العناية المركزة) ## Pressure regulator (reducing valve) Pressure regulators are used because: 1. Gas and vapour are stored under high pressure in cylinders. A regulator reduces the variable cylinder pressure to a constant safer operating pressure of about 400 kPa. 2. The temperature and pressure of the cylinder contents decrease with use. In order to maintain flow, constant adjustment is required in the absence of regulators. 3. Regulators protect the components of the anesthetic machine against pressure surges. ### Component:- 1. An inlet, with a filter, leading to a high-pressure chamber 2. This valve leads to a low-pressure chamber and outlet. 3. A diaphragm attached to a spring is situated in the low-pressure chamber. ### Mechanism of action 1. Gas enters the high-pressure chamber and passes into the low-pressure chamber via the valve. 2. The force exerted by the high-pressure gas tries to close the valve. The opposing force of the diaphragm and spring tries to open the valve. A balance is reached between the two opposing forces. This maintains a gas flow under a constant pressure of about 400 kPa. ### Problems in practice and safety features 1. Formation of ice inside the regulator can occur. If the cylinder contains water vapour, this may condense and freeze as a result of the heat lost when gas expands on entry into the low-pressure chamber. 2. The diaphragm can rupture 3. A one-way valve is positioned within the cylinder supply line. This prevents backflow and loss of gas from the pipeline supplies. This one-way valve may be incorporated into the design of the pressure regulator **THANK YOU............** **Dr.Lina A.Ridha** **MB.CH.B/FICMS/anesth. & IC**
