# Shared Flashcard Set

## Details

Anestesia Values/Machine CVM
Anestesia Values/Machine
61
Veterinary Medicine
04/18/2013

Term
 3 types of gas supply
Definition
 1. Compressed2. Liquid3. O2 generators
Term
 Formula for how many liters of 02 are in a compressed O2 cylinder
Definition
 PSI of tank * 0.3 = L
Term
 How to calculated FLOW RATE of an O2 cylinder
Definition
 PSI of tank * 0.3 = LThen take your L/60 = L/min
Term
 How many turns to open the tank
Definition
 2 full turns
Term
 Oxygen line pressure needed
Definition
 50 psi
Term
 What the Yolk and Pin Index system do
Definition
 Make sure you are putting the right tank on
Term
 Describe the path of an O2 molecule from tank to flow meter
Definition
 tank --> Pressure reduction valve (PSI) --> Line/tube (50PSI) --> Flow Meter (L/min)
Term
 What do we use the flow meter for?
Definition
 Read ml/min or L/min going to the vaporizerRead middle of ball or top of bobbin
Term
 What rate should we set the flow meter at?
Definition
 02 flow should ≥ Metabolic need
Term
 Oxygen Flush Valve function
Definition
 Allows 02 to by-pass the flow meters and vaporizerie: Pure O2 into a breathing system
Term
 What is the O2 flush flow rate?
Definition
 35-75L/min .... so about 50 L/min (HIGH flow rate)
Term
 What is Oxygen + Vaporized Anesthetic?
Definition
 Fresh Gas
Term
 What is the fresh gas line connected to?
Definition
 Fresh Gas --> Attaches at fresh gas inlet to a breating Circuit
Term
 2 types of breating circuits
Definition
 Rebreating Non-Rebreating
Term
 Bain Circuit type
Definition
 NON-Rebreating
Term
 Rebreating Circular System
Definition
 Unidirectional Valves (Flutter Valves) keep O2 flowing in the
Term
 Problem with circular systems
Definition
 moisture can cause valves to stick
Term
 Size of reservoir bag
Definition
 6 * tidal volume (tidal volume = 5-7 ml/lb) ---> just remember 6 * (6ml/lb)
Term
 Why we use a reservoir bag
Definition
 monitor breathingAllows you to give them a breath
Term
 What weight do you use an adult breathing circuit
Definition
 > 20 lbs
Term
 What weight do you use a pediatric breathing circuit
Definition
 <20lbs
Term
 Where does dead space begin in breathing circuit?
Definition
 At "Y"
Term
 Pressure manometer (pressure Gauge) purpose
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
Term
 What is the pressure manometer units
Definition
 cm H20 PSI --> L/Min --> cm H20
Term
 Do you have to close the pop-off valve to give a breath?
Definition
 YES! 20mmH20 breath
Term
 How do you know the CO2 absorber is working
Definition
 Its warmGranules are softGranules are blue (blue when CO2 present)
Term
 What is it size of the CO2 absorber
Definition
 2 * tidal Volume
Term
 When to change soda lime
Definition
 When granules are hardAfter 1/2 color changed If Channeled Not warm!
Term
 Why does channeling happen?
Definition
 MOISTURE causes clumping on sidesor Too full canister can't expand Will be all blue in middle but the outsides will be white Bad b/c rebreathing CO2
Term
 What is the pop off valve purpose
Definition
 relieve pressure in the circuit Allow waste gases to go to scavenge prevents barotrauma
Term
 What is the 02 rate in a CLOSED system
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
Term
 Metabolic rate of Oxygen
Definition
 2-3 ml/lb/min
Term
 In a semi-closed system what is the rate of O2
Definition
 > metabolic rate of O2 NEED to have scavenge for extra CO2
Term
 Where is the negative pressure release valve
Definition
 on top of the inhale valve
Term
 What is the purpose of the negative pressure release valve
Definition
 will let in room air is there is negative pressure when the animal breaths (ran out of O2)
Term
 If the system has no valves what is it?
Definition
 non-rebreathing
Term
 What is a Universal F- Circuit
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
Term
 Closed vs. Semi-closed Circular systems - What is the difference determined by?
Definition
 O2 Flow Rate!Closed = metabolic rateSemi-closed = > metabolic rate
Term
 What does the term "Closed" indicate?
Definition
 That some/all of the exhaled gases are rebreathed - Not that the pop-off valve is closed.
Term
 Advantages of a closed circle system
Definition
 Save \$\$Less Pollution Conserves heat and humidity dont have to continually open and close pop-off to give breath
Term
 Disadvantages of a closed circle system
Definition
 Hypoxia - watch res bag to determine if giving enough O2 Takes LONGER to change anesthetic [ ] in circuit
Term
Definition
 can quickly change rates if anesthetic [ ]
Term
 What is "Low-Flow" anesthesia?
Definition
 When the O2 flow rate is CLOSE to metabolic rate in a semi-closed system
Term
 Problem with Circular Systems in general
Definition
 SLOW change rates if anesthetic [ ] w/ closed and low-flowCant use on very small patients
Term
 How to test the Circuit w/ a circle system
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!!!!
Term
 Circle System = what kind of circuit
Definition
 Rebreathing
Term
 Bain Circuit is what kind of system
Definition
 Non-rebreathing Used for smaller animals
Term
 Describe a Bain Circuit
Definition
 A tube inside a tubeThe innermost tube carries Fresh Gas in Outer Tube carriers CO2 out
Term
 What size do we use a Bain Circuit for
Definition
 Wee little ones - <5lbs pr < 2-3kg
Term
 Why do animals not rebreath CO2 w/ a bain circuit
Definition
 High O2 rates
Term
 What is the O2 flow rate of a Bain Circuit (non-rebreathing)
Definition
 100 ml/lb ** KNow! its a HIGH FLOW RATE
Term
 Will you have some CO2 rebreating with a bain circuit
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
Term
 Why use Bain System on patients < 5-6 lbs
Definition
 Decreased Dead SpaceDecreased Resistance to breathing
Term
Definition
 Uses more O2 and anesthetic per/lb of patientLoss of humidity = COld PatientLoss of Heat = Cold Patientcan NOT use O2 Flush = Barotrauma
Term
 Why can you NOT use O2 flush in a bain circ?
Definition
 BAROTRAUMA!
Term
 Comparison of O2 flow rates in RebreathingNon-Rebreathing Semi-closed Non-rebreating Semi-open
Definition
 Rebreathing = 2-3 ml/lb/min (= met rate)Non-Rebreathing Semi-closed = > met rateNon-rebreating Semi-open = 100 ml/lb/min
Term
 Comparison of pop-off valves in RebreathingNon-Rebreathing Semi-closed Non-rebreating Semi-open
Definition
 Rebreathing = CLosedNon-Rebreathing Semi-closed = Open, except when giving breathNon-rebreating Semi-open = Open, except when giving breath
Term
 Peep valve purpose
Definition
 Put in backwards --> Will open up @ 20 mg H20?- Safety mech to prevent pressure build up in circuit ie: prevent barotrauma
Term
 what does the F/Air canister contain?
Definition
 Activated Charcoal
Term
 Active Scavenge
Definition
 Suction of waste material into scavenge
Term
 Passive Scavenge
Definition
 + pressure of waste gases pushed gas into scavenge
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