General Respiratory Care Exam 1
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35 Terms
Boyle's Law
P1V1=P2V2
Charles Law
V1/T1=V2/T2
Daltons law
Ptotal = P1 + P2 + P3...
1 liter
1.05 quart
1 teaspoon
5 milliliters
1 fl oz
30 mL
Partial Pressure of O2 at sea level
159mmHg
Partial Pressure of O2 Equation
Pb x FO2
Critical Temperature
the temperature above which a substance cannot exist in the liquid state
Critical Pressure
the lowest pressure at which a substance can exist as a liquid at the critical temperature
Nitric Oxide
powerful pulmonary vasodilator, FDA approved for persistent pulmonary hypertension of the newborn (PPHN)
Methods of getting Oxygen
Heating metallic oxides, Electrolysis, Fractional Distillation (Hospitals), and Molecular Filtration (Homecare)
1 cubic ft of liquid O2 is equal to
860 cubic ft of gaseous O2
Zone Valves
isolate areas; must be labeled (user friendly)
GSR
Gas Supply Remaining
Steel Cylinders
Flat bottom; heaviest; tested every 10 years
aluminum cylinders
tested every 5 years; mri compatible; 40% lighter
Composite Cylinder
70% lighter than steel; round bottom
Nasal Cannula
22%-44%; ..5L-6L
Simple mask
35-50%; 5 to 10 LPM
Partial rebreather mask
40-70%; 8-15 LPM
Non rebreather mask
60-100%; 10-15 LPM
pulse oximeter
estimates hemoglobin O2 saturation in plasma
PaO2
predicts o2 saturation; doesnt measure hemoglobin; measures pH
Co-oximeter
Measures Methemoglobin and Carbon Monoxide; 0-3% normal value
Capnography
Measures CO2; normal range of 35-45mmHg
Low Flow Characteristics
Approximate Flow; function off patients breathing pattern
high flow characteristics
fixed flow; delivers adequate flow to meet or exceed flow demand
Bernouli's Principle
as the velocity of a fluid increases, the pressure exerted by the fluid decreases
Venturi Effect
adds another tube to increase the totla flow
Viscous Shearing force
as moving gas encounter stationary gas, the friction will accelerate the stationary gas
Obstruction or Restirction in High Flow
lowers air entrainment; increases FiO2
Typical inspiratory Flow rate of adult
25-30 LPM
Higher FiO2 indicates
lower total flow
Lower FiO2 indicates
higher total flow