Pressure Systems
What are the components of the high pressure system?
O2 source, regulator, pressure gauge
What is the most common O2 cylinder used in small animal?
E-cylinder
Main function of vapoizer?
Converts liquid agent to controlled vapor
Formula for liquid use per hr.
Flow X % X 3 = mL
What happens if vaporizer is tipped?
Contaminates bypass
What are the components in the intermediate pressure system?
Pipeline connections, flowmeter, O2 flush
What color is the O2 cylinder?
Green
What type of vaporizer splits gas flow?
Variable bypass
Why reduce flow after induction?
Save agent and reduce cost (waste)
What should you avoid putting on a tank valve and why?
Oil/grease=Explosion risk
What components make up the low-pressure system?
Vaporizer, fresh gas outlet, breathing circuit
How should the tanks be stored when not attached to the machine?
What is Isoflurane's vapor pressure?
240 mm/Hg
What is the constant for calculating liquid use?
3
How can a barotrauma occur?
Using O2 flush valve while connected
What does the flowmeter do?
What is pressure (psi) and capacity (L) of the common small animal O2 tank?
1900 psi/ 660L
Determines the maximum deliverable concentration
If an E tank reads 560 psi and the flow is 2 L/min how much is left in the O2 tank?
560 / 1900 * 660=195L / 2 = 98 minutes
What prevents the incorrect cylinder from being mounted to the machine?
What does the regulator do?
Changes the O2 pressure from high to low
What hangs the O2 tank to the machine?
Hanger yolk
What is the maximum deliverable concentration possible for isoflurane?
32%
What is the formula for calculating how much is left in the O2 tank?
Tanks current psi X 1900 psi X 660 L = answer / O2 flow rate
What are three things that could result in O2 supply issues?