Scavenging Systems Flashcards
What is the NIOSH recommended limit for anesthetic alone?
2ppm
What is the NIOSH recommended limit for Nitrous Oxide?
25ppm
What is the NIOSH recommended limit for nitrous oxide and anesthetic together?
0.5ppm
What are the five basic components of the scavenging system?
- Gas collecting assembly
- Transfer means
- Scavenging interface
- Gas disposal tubing
- Gas disposal assembly
What is the diameter of tubing on the gas collecting assembly?
30mm so that it doesn’t connect to other components
Between what pressures does the scavenging interface limit pressures?
between - 0.5 and 5 cmH20
What is the average difference between Pa CO2 and ETCO2?
PaCO2 is usually 2-5 mmHg higher than ETCO2.
What are the components of soda lime?
80% calcium hydroxide 15% H2O 4% sodium hydroxide 1% potassium hydroxide 0.2% silica
What is the CO2 capacity of soda lime?
26 L/ 100g of absorbant
What are the components of calcium hydroxide lime?
80% calcium hydroxide
16% water
4 % calcium chloride
What is the CO2 capacity of calcium hydroxide?
10 L of CO2/ 100 g of absorbant
What color does Ethyl violet turn when it is exhausted?
purple
What dangerous product can be made when sevoflurane comes in contact with soda lime?
Compound A
What product can dry soda lime cause?
CO
What is the function of the scavenging interface?
To prevent pressure increases or decreases in the scavenging system from being transmitted to the breathing system. The interface limits pressures immediately downstream of the gas-collecting assembly to between -0.5cmH20 to 5 cm H2O