I photographed this little guy in Hong Kong – he’s (or perhaps she’s??) looking bit ragged. Following yesterday’s post I did a bit of research. It tuns out that sea jellies have no breathing system at all. They meet their oxygen requirements through diffusion across their bodies….
Today we will turn our focus to the circle system. This is something most of us use every day. I asked a viva on it in the last exam and was surprised by many of the answers I was given.
The circuit is circular with unidirectional valves – does that mean that gas flows in only one direction throughout the entire system?
BT_SQ 1.13 Describe and classify breathing systems used in anaesthesia. Evaluate their clinical utility and hazards associated with their use
The circle circuit, as commonly used in current anaesthetic practice, is a closed system TRUE/FALSE
With the standard circle arrangement, fresh gas commonly flows through the CO2 absorber TRUE/FALSE
Placing the APL valve before the CO2 absorber (on the expiratory limb) helps to conserve the CO2 absorbent TRUE/FALSE
When running the circle as a closed circuit, minimal gas monitoring is required, as it is a stable system TRUE/FALSE
A safe circle system requires the fresh gas flow to be placed between the patient and the expiratory valve TRUE/FALSE