GasGasGas - The FRCA Primary Exam Podcast VivaCast - 008 - Oxygen Storage - Wheatstone Bridges - Resonance/Damping - Fibre optics and Lasers
Feb 16, 2025
Dive into the fascinating world of oxygen as its properties and storage in hospitals are unraveled. Explore the intricacies of Wheatstone Bridges for measuring resistance and the difference between resistors and capacitors. Discover how arterial lines can estimate cardiac output, and learn about the roles of damping and resonance in monitoring systems. Get a glimpse into fiber optics, including how light is transmitted and its comparison to laser light, alongside clinical uses and safety measures for lasers in practice.
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Basic Properties Of Oxygen
- Oxygen is a diatomic gas at ~21% of atmospheric air and essential for cellular energy production.
- Its critical temperature (~-118°C) means it's gaseous at standard conditions.
Safely Store Hospital Oxygen
- Store hospital oxygen in VIEs kept below oxygen's critical temperature so some remains liquid and pressure is safe.
- Use pressure-reducing valves and blow-off valves to maintain pipeline pressure around 400 kPa and prevent overpressure.
Weighing Shows VIE Oxygen Content
- The reliable way to know how much oxygen remains in a VIE is to weigh the container.
- Weight measurement works regardless of the oxygen's state inside.