05. Equipment Flashcards
Concerning cyrogenic liquid systems, what volume of gas does 1 volume of liquid oxygen give you?
842 times its volume.
What is the pressure inside a VIE?
10.5 bar
Does oxygen require heating at the outlet of a cryogenic liquid system?
heating of gaseous oxygen is required at the outlet using a heat exchanger
What is the length of onsite storage capacity requirement of VIE?
14 days.
Is nitrous oxide liquid in cylinders?
yes, up to 95% liquid
Regarding pipes:
What are they made of?
What is the pipeline pressure of oxygen, N2O, medical air and surgical air?
Made of copper,
4 bar for all except surgical air which is 7 bar.
Difference between where Schrader sockets and NIST are used?
- Schrader sockets and probes are used to connect to terminal outlets for medical gases.
- NIST is used to connect to anaesthetic machines.
What flow does the emergency oxygen flush have to provide?
It should provide at least 35 L/min to match inspiratory flow rate
What flow should suction be able to provide?
25 L/min is a required displacement capacity of suction system
How do you check the performance of the suction system?
should be able to generate negative pressure of more than 500 mmHg in 10 seconds when tube is kinked.
Suction tubing should be off high/ low resistance and compliance?
low resistance and compliance.
In a TEC 6 Vapouriser:
What is the purpose of the splitting ratio?
What is Desflurane heated to?
Splitting ration ensures saturation of fresh gas flow with anaesthetic vapour.
TEC 6 is heated to 39C.
23.5C is boiling temperature of Desflurane
How much CO2 will 1kg of soda lime absorb?
250 L
What is the largest component of soda lime?
The largest component calcium hydroxide (80%)
What size is the scavenger connector?
30 mm
What information is required to calculate the remaining amount of N2O in a cyclinder?
MW of N2O (44)
Avogadro’s number (22.4)
cylinder’s weight
cylinder’s weight when empty
In a TEC 6 vaporiser, what is the vaporising chamber pressurised to?
The vaporisation chamber is pressurised to approximately 200 kPa
What type of vapouriser is a TEC 6?
How is it different from other vapourisers?
It is called measure flow vaporiser
It is different from ordinary TEC vaporizers to provide very accurate electronically controlled gas injection of Desflurane into carrier gas.
Incorporates a differential pressure transducer
What is the pressure across APL valve limited to?
60cm H20
What size of connectors are generally used in a breathing system?
15 mm and 22 mm,
except for scavenging which uses 30 mm.
What does the oxygen failure alarm depend upon?
Does it depend upon an electrical source for the alarm?
Activation is dependent solely on oxygen supply pressure. It is coupled to a valve that interrupts the flow of anaesthetic gases
Electrical source not required for the alarm.
