EMT - O2 delivery, tanks, rates, and masks
What is the flow rate of the nasal cannula?
1 to 6 lpm
What is the starting psi of oxygen tanks?
2000 psi
How much O2 does the Venturi mask deliver?
24% to 50%, variable according to adaptor being used
What is the volume of the M tank?
3450L
Which tanks do EMTs usually use?
D (400L, 0.16) or E (660L, 0.28), for portability
What reduces the pressure coming out of the tank?
The regulator
What is the factor of the D cylinder?
0.16
What is the residual tank psi?
200 to 300 psi
How much oxygen does the cannula deliver?
24% to 40% (according to slides) 24% to 44% (according to book)
What is the flow rate of the simple face mask?
6 to 10 lpm
How much oxygen does the BVM deliver WITHOUT an oxygen line?
21%, same as room air
What is the volume of the E tank?
660L
How much oxygen does the BVM deliver WITH an oxygen line?
90% and 95% oxygen
How much oxygen does the NRB deliver?
Up to 90%
Why shouldn't you completely drain an oxygen tank?
Moisture or other contaminants may enter the cylinder, reducing tank life, possibly rusting the inside of the cylinder; The cylinder may not be filled prior to testing the cylinder to ensure integrity.
What is the flow rate of the NRB?
10 to 15 lpm
What are the sizes of couplings used for oxygen masks?
15mm and 22mm
What is the oxygen tank duration equation?
[(tank pressure - residual) × cylinder constant]/flow rate
What is the factor of the E tank?
0.28
What is the factor of the M tank?
1.56
How much oxygen does the simple face mask deliver?
40% to 60%
What is the volume of the D cylinder?
400L
Describe the oxygen tanks used by EMTs
D tank ------ 400L, 0.16 E tank ------ 660L, 0.28 M tank ------ 3450L, 1.56
What controls the amount of oxygen that is delivered to the patient?
The flowmeter
