Anesthesia Machine, Breathing Circuits, Inhalants (Pt. 1 &2) Flashcards
Where does the breathing circuit begin?
Fresh gas outlet
Most common portable tank? Pressure and volume?
E tank
2,000 psi, 700L
Most common bulk tank? Pressure and volume?
H tank
2,000 psi, 7,000L
Name the cylinder color for:
1) Oxygen
2) NO
3) Nitrogen
4) medical-grade air
1) green
2) blue
3) black
4) yellow
Which safety system prevents hooking up a PORTABLE tank to the incorrect yoke?
Pin index safety system
each type of gas tank has holes in unique locations that align with pins on the corresponding gas line
Working pressure entering into the anesthesia machine?
45-50 psi
2 mechanisms that can be present on WALL OUTLETS to prevent hooking up supply lines to the wrong source?
Diameter Index Safety System
Quick connect
How does activation of the oxygen flush valve affect anesthetic concentrations in the system?
Decreases (dilutes) them
Which part of the anesthesia machine enables the liquid anesthetic to become a vapor and mix with oxygen?
Anesthesia vaporizer
Common outflow for the vaporizer and oxygen flush?
fresh gas outlet
this is also where the breathing circuit connects
4 classifications of breathing circuits?
1) open
2) semi-open (non-rebreathing)
3) semi-closed (circle)
4) closed (circle)
4 advantages of non-rebreathing over circle system
1) low resistance
2) simple (low failure)
3) no distance limitations
4) immediate control of inspired concentration
Main difference between semi-closed and closed circuit?
in semi-closed, FGF exceeds patient’s metabolic requirement
Closed only supplies enough to meet patient’s metabolic needs
Purpose of Sodasorb and what are the by-products of its interaction with CO2?
Sodasorb scavenges CO2 from expired gas
produces water and heat
2 purposes of APL (pop-off) valve?
1) vents excess gas from circuit
2) close to provide patient with manual ventilation
This structure of an ET tube provides a secondary airway should the primary lumen become occluded
Murphy eye
T/F: The cuff on an ET tube will eliminate the risk of aspiration entirely
False
*cuff mainly serves to reduce leaks for positive pressure ventilation
Name two advantages of ISO over SEVO
Iso is more potent and costs less
COST= PRIMARY advantage
Name one advantage of SEVO over ISO
It’s less soluble (works faster)
Less soluble= good; less will go to blood and other tissues…more to brain!
Both SEVO & ISO are administered as _____
vapors
Vapor pressure denotes the ability of a substance to ______
evaporate
higher vapor pressure=more likely to evaporate
In a mixture of gases, the pressure exerted by one gas if it occupied the space alone?
Partial pressure
How to calculate partial pressure?
multiple the % of the gas of interest by the atmospheric pressure
Clinically useful way to record the amount of inhalant being administered to a patient?
Volume percent