Term
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Definition
1. Compressed
2. Liquid
3. O2 generators |
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Term
| Formula for how many liters of 02 are in a compressed O2 cylinder |
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Definition
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Term
| How to calculated FLOW RATE of an O2 cylinder |
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Definition
PSI of tank * 0.3 = L
Then take your L/60 = L/min |
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Term
| How many turns to open the tank |
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Definition
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Term
| Oxygen line pressure needed |
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Definition
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Term
| What the Yolk and Pin Index system do |
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Definition
| Make sure you are putting the right tank on |
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Term
| Describe the path of an O2 molecule from tank to flow meter |
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Definition
| tank --> Pressure reduction valve (PSI) --> Line/tube (50PSI) --> Flow Meter (L/min) |
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Term
| What do we use the flow meter for? |
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Definition
Read ml/min or L/min going to the vaporizer
Read middle of ball or top of bobbin |
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Term
| What rate should we set the flow meter at? |
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Definition
| 02 flow should ≥ Metabolic need |
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Term
| Oxygen Flush Valve function |
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Definition
Allows 02 to by-pass the flow meters and vaporizer
ie: Pure O2 into a breathing system |
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Term
| What is the O2 flush flow rate? |
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Definition
| 35-75L/min .... so about 50 L/min (HIGH flow rate) |
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Term
| What is Oxygen + Vaporized Anesthetic? |
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Definition
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Term
| What is the fresh gas line connected to? |
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Definition
| Fresh Gas --> Attaches at fresh gas inlet to a breating Circuit |
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Term
| 2 types of breating circuits |
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Definition
Rebreating
Non-Rebreating |
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Term
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Definition
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Term
| Rebreating Circular System |
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Definition
| Unidirectional Valves (Flutter Valves) keep O2 flowing in the |
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Term
| Problem with circular systems |
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Definition
| moisture can cause valves to stick |
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Term
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Definition
6 * tidal volume
(tidal volume = 5-7 ml/lb) ---> just remember 6 * (6ml/lb) |
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Term
| Why we use a reservoir bag |
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Definition
monitor breathing
Allows you to give them a breath |
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Term
| What weight do you use an adult breathing circuit |
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Definition
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Term
| What weight do you use a pediatric breathing circuit |
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Definition
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Term
| Where does dead space begin in breathing circuit? |
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Definition
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Term
| Pressure manometer (pressure Gauge) purpose |
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Definition
Measures the pressure w/in the Breathing circuit
Used to determine how big of tidal volume to deliver to patient
Measured in cm H2O |
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Term
| What is the pressure manometer units |
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Definition
cm H20
PSI --> L/Min --> cm H20 |
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Term
| Do you have to close the pop-off valve to give a breath? |
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Definition
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Term
| How do you know the CO2 absorber is working |
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Definition
Its warm
Granules are soft
Granules are blue (blue when CO2 present) |
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Term
| What is it size of the CO2 absorber |
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Definition
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Term
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Definition
When granules are hard
After 1/2 color changed
If Channeled
Not warm! |
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Term
| Why does channeling happen? |
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Definition
MOISTURE causes clumping on sides
or
Too full canister can't expand
Will be all blue in middle but the outsides will be white
Bad b/c rebreathing CO2 |
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Term
| What is the pop off valve purpose |
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Definition
relieve pressure in the circuit
Allow waste gases to go to scavenge
prevents barotrauma |
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Term
| What is the 02 rate in a CLOSED system |
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Definition
O2 rate = Metabolic rate! (2-3 ml/lb/min)
Can have pop-off valve closed/ no scavenge since you are at metabolic rate and rebreathing the O2 |
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Term
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Definition
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Term
| In a semi-closed system what is the rate of O2 |
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Definition
> metabolic rate of O2
NEED to have scavenge for extra CO2 |
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Term
| Where is the negative pressure release valve |
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Definition
| on top of the inhale valve |
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Term
| What is the purpose of the negative pressure release valve |
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Definition
| will let in room air is there is negative pressure when the animal breaths (ran out of O2) |
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Term
| If the system has no valves what is it? |
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Definition
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Term
| What is a Universal F- Circuit |
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Definition
rebreathing circuit that aids in warming and humidification
there is an increased resistance to breathing --> use in patients > 20 lbs
Has identical funct to conventional circuit |
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Term
| Closed vs. Semi-closed Circular systems - What is the difference determined by? |
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Definition
O2 Flow Rate!
Closed = metabolic rate
Semi-closed = > metabolic rate |
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Term
| What does the term "Closed" indicate? |
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Definition
| That some/all of the exhaled gases are rebreathed - Not that the pop-off valve is closed. |
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Term
| Advantages of a closed circle system |
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Definition
Save $$
Less Pollution
Conserves heat and humidity
dont have to continually open and close pop-off to give breath |
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Term
| Disadvantages of a closed circle system |
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Definition
Hypoxia - watch res bag to determine if giving enough O2
Takes LONGER to change anesthetic [ ] in circuit |
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Term
| Semi closed circle circuit advantages |
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Definition
| can quickly change rates if anesthetic [ ] |
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Term
| What is "Low-Flow" anesthesia? |
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Definition
| When the O2 flow rate is CLOSE to metabolic rate in a semi-closed system |
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Term
| Problem with Circular Systems in general |
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Definition
SLOW change rates if anesthetic [ ] w/ closed and low-flow
Cant use on very small patients |
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Term
| How to test the Circuit w/ a circle system |
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Definition
Close pop-off valve --> occlue Y-peice w/ thumb --> push the O2 Flush until you have 20 cm H2O
If the Manometer falls in pressure indicates a leak!!!! |
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Term
| Circle System = what kind of circuit |
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Definition
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Term
| Bain Circuit is what kind of system |
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Definition
Non-rebreathing
Used for smaller animals |
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Term
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Definition
A tube inside a tube
The innermost tube carries Fresh Gas in
Outer Tube carriers CO2 out |
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Term
| What size do we use a Bain Circuit for |
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Definition
| Wee little ones - <5lbs pr < 2-3kg |
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Term
| Why do animals not rebreath CO2 w/ a bain circuit |
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Definition
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Term
| What is the O2 flow rate of a Bain Circuit (non-rebreathing) |
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Definition
| 100 ml/lb ** KNow! its a HIGH FLOW RATE |
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Term
| Will you have some CO2 rebreating with a bain circuit |
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Definition
Yes! Even with a flow rate of 100ml/lb
to completely eliminate need flow rate = 3X minute ventilation
Minute Vent = Resp Rate * Tidal Volume
TV = 5-7 ml/lb |
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Term
| Why use Bain System on patients < 5-6 lbs |
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Definition
Decreased Dead Space
Decreased Resistance to breathing |
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Term
| Disadvantages of Bain Circuit |
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Definition
Uses more O2 and anesthetic per/lb of patient
Loss of humidity = COld Patient
Loss of Heat = Cold Patient
can NOT use O2 Flush = Barotrauma |
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Term
| Why can you NOT use O2 flush in a bain circ? |
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Definition
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Term
Comparison of O2 flow rates in
Rebreathing
Non-Rebreathing Semi-closed
Non-rebreating Semi-open |
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Definition
Rebreathing = 2-3 ml/lb/min (= met rate)
Non-Rebreathing Semi-closed = > met rate
Non-rebreating Semi-open = 100 ml/lb/min |
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Term
Comparison of pop-off valves in
Rebreathing
Non-Rebreathing Semi-closed
Non-rebreating Semi-open |
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Definition
Rebreathing = CLosed
Non-Rebreathing Semi-closed = Open, except when giving breath
Non-rebreating Semi-open = Open, except when giving breath |
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Term
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Definition
Put in backwards --> Will open up @ 20 mg H20?
- Safety mech to prevent pressure build up in circuit
ie: prevent barotrauma |
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Term
| what does the F/Air canister contain? |
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Definition
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Term
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Definition
| Suction of waste material into scavenge |
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Term
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Definition
| + pressure of waste gases pushed gas into scavenge |
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