Breathing systems, ETT, scavenging Flashcards
what are 2 types of pt breathing systems
rebreathing & non rebreathing
2 types rebreathing systems
circle
universal F
most common non rebreathing systems
Bain (modified Mapleson D)
Mapleson F
Do breathing tubes in a circle system constitue dead space
no because flow is undirectional (no rebreathing)
How to calculate reservoir bag size for SA
Tidal volume (15 mL/kg) x 6 round up
Typical O2 flow rates small animals (<50 kg) in rebreathing systems
50-100 mL/kg/min induction/recovery
20-50 mL/kg/min maintenance
Typical O2 flow rates lg animals (>50kg)
20-50 mL/kg/min induction/recovery
10-20 mL/kg/min maintenance
When would it be an advantage to use a non rebreathing system
small pt <3kg
O2 flow rates for non rebreathing systems
2-3 x TV
300 mL/kg/min
high flow prevents rebreathing CO2
What factor has the largest effect on resistance to gas flow in ET tube
Radius (Poiseuilles Law)
How many people needed to test ETT cuff inflation
Why
2 people
Because the APL valve must be closed temporarily
A complication of intubation that can be prevented
How?
Endobronchial intubation
measure tube at time of intubation, ETT should not extend past thoracic inlet
