Machine Parts & Functions QUIZ & LAB Flashcards
Define each:
1. Vaporizer
2. Flow meter
3. Flush valve
4. Inspiratory & expiratory valves
5. Pressure relief valve
6. Manometer
7. Scavenging system
- Holds liquid anesthetic & converts into gas
- Regulates how much O2 enters the system & delivered to the patient
- Allows a quick infusion & high flow rate of pure O2 into the breathing circuit
- Unidirectional valves that permit one-way flow of gas
- Prevents build of pressure within the system
- An indicator of pressure within the system and the patient’s lungs
- Absorbs excess anesthetic gases
Which of the following is INCORRECT for a NON-rebreathing system?
1. Typically used for patients less than 10#
2. Uses a high flow of oxygen
3. Can result in hypothermia
4. Uses the CO2 absorber
- Uses the CO2 absorber
T/F: Anesthesia machines should never be tipped as this can seriously affect the function of the vaporizer.
True
Does this diagram show Inspiratory Flow or Expiratory Flow in the rebreathing anesthetic circuit?
1. expiratory
2. inspiratory
- expiratory
Where in the system does it go from a high pressure system to a low pressure system? (choose all that apply)
1. The pressure reducing valve
2. Manometer
3. Flowmeter
4. Vaporizer
1 - The pressure reducing valve
3 - Flowmeter
How do you select an appropriate reservoir bag? (choose all the correct answers)
1. It is 5-6 times their tidal volume
2. You always round up to a larger bag
3. It is 10-12 times their tidal volume
4. Based on the weight chart; calculations are unnecessary
5. You look at their chest wall movements alone
6. You always round down to a smaller size
- It is 5-6 times their tidal volume
- You always round up to a larger bag
Which of the following is INCORRECT for the CO2 absorber?
1. Fresh crystals are easily crushed
2. A chemical reaction causes a color change
3. The crystals should be changed based on time used
4. The crystals can be sodium or barium lime
5. The CO2 absorber is not needed in a rebreather circuit
- The CO2 absorber is not needed in a rebreather circuit
CO2 absorber is needed for rebreathing circuit!!
To what pressure do you watch the manometer when administering a breath to the patient?
1. no more than 20 cm H2O
2. no less than 45 psi
3. no less than 20 cm H20
4. no more than 45 psi
- no more than 20 cm H2O
B, C, G, H, J
B: Oxygen flush valve
C: O2 flowmeter
G: Pop-off valve
H: Line to gas anesthetic scavenger
J: Manometer
There are two basic types of anesthetic systems (circuits) used for dogs/cats:
Standard & Non-standard precision
Parts and Purpose/Function:
A, B, E, F, & G
A. Oxygen tank
- Give patient oxygen.
- This is an E tank. H tank is larger.
B. Yoke
- Holds O2 tank in place & prevents other tanks from attaching (specific O2 yoke).
E. Flow meter
- Regulates how much O2 enters the system & delivered to patient.
F. O2 Flush Valve
- Quick infusion of pure O2 into breathing circuit.
- Flush system of residual gases.
G. Vaporizer
- Hold liquid anesthetic & vaporize into gas in a controlled form.
- This is a precision vaporizer
Parts and Purpose/Function:
L, M, N, K, H, I, & J
L. “Pop off” valve or Push valve
- Prevents buildup of pressure when open.
- Determine flow rates.
M. Manometer
- Measures pressure within the system & patient’s lungs.
N. Reservoir bag
- Allows manual ventilation & reservoir of additional gas.
K. Exhalation Valve
- Patient exhales, gas travels thru this unidirectional valve.
H. Inhalation Valve
- Patient inhales & gas moves thru the unidirectional valve to ET tube.
I. Negative Pressure Relief Valve
- Controls flow of air into system/compression chamber.
J. Breathing Tube
- To give O2 & gas to patient. (Rebreathing tubes).
Parts and Purpose/Function:
C, D, O, & P
C. Tank Pressure Gauge
- Tells us the PSI of the O2 tank & how full the tank is. (PSI is unit of measurement).
D. Pressure Reducer Valve
- Lowers pressure leaving tank so it may flow thru the flowmeter.
O. CO2 Absorbent
- Absorbs CO2 exhaled from the patient.
P. Scavenging System
- Anesthetic exhaled travels passively down to anesthetic absorbent.
You have an “E” tank attached to your anesthetic machine. You turn it on and find that the pressure reads 750psi. Assuming a full tank is 660L, how much oxygen is left in the tank?
225L
750psi x 0.3 = 225L
You have an “E” tank attached to your anesthetic machine. You turn it on and find that the pressure reads 1000psi.
a. Assuming the full tank is 660L of oxygen how much is left in the tank?
b. If you ran a procedure at 2L /min – how long could you run the tank before it is empty?
a. 300L
1000 x 0.3 = 300L
b. 150min or 2.5hrs
300L / 2L/min = 150min
