Chapter 5 Flashcards
Nasal Cannula LPM
1-6lpm and 24-44%
LPM for a trach mask
8-12
Simple mask LPM
5-10
How do you know if you need to increase the flow to a non-re-breather mask
if the bag collapses greater than 1/2 on inspiration
Variable FiO2
Occurs with all low flow oxygen systems because inspiratory flow of an adult exceeds 8 L/min
water that is considered humidity has water in what form?
Humidity is water in MOLECULAR form
The four factors that effect the efficiency of humidity
Temp, surface area, contact time, and depth of water reservoir
S/S that pt is in humidity deficit
Tenacious secretions, dry cough, atelectasis,
Goal of humidity
to minimize or eliminate a humidity deficit while inhaling a dry gas
Inspissated
thickened, dried, or made less fluid by evaporation
types of humidifiers
bubble, simple reservoir, aerosol
Pop off valve on bubblers can be caused by
high flow or kinked tubing
Wick humidifier
AKA Passover aka simple reservoir that delivers 1000% air
what does a servo controlled humidifier do
shuts off heat if there is no water left
aerosol
contains particulate matter
factors affecting particle deposition of aerosol
inertial impaction, sedimentation, size, and diffusion
What particle size is required to become deposited in the oropharynx?
5 to 10
what can increase deposition?
Increased tidal volume, longer inhalation, and breath hold
aerosols can be used for what three modes?
sputum induction, humidity therapy, and as medication
Bernouli’s principle
As pressure decreases, flow will increase
if a jet has a larger orifice, what will the result be on particles?
causes larger particles and decrease delivery time
What flow rate requires you to “t” two flowmeters during nebulizer treatment
more than 15.
simple mask lpm
5-10
simple mask oxygen %
35-50%
Partial rebreathing mask lpm
8 or greater
Partial rebreathing mask oxygen %
up to 60%
Another name for a venturi mask
Air Entrainment Mask
venturi mask oxygen %
Constant at 24/28/35/50
resevoir tubing purpose for T tube
Uses 50 mL resevoir tubing to help maintain FiO2
visible mist coming out of the resevoir means what?
adequate flow is achieved
if the resevoir tube is detatched what will happen
the inspired O2 will decrease.
Oxygen Toxicity
Lung damage as a result of O2 of 50% or highere for 48 to 72 hours
two main factors that determine effects of O2 toxicity
FiO2 and exposure time
What happens if you raise PaO2 with 70mmHG or higher
they will become lethargic and somnolent from knocking out the hypoxic drive
What devices do you use for COPD pt
FiO2 of less than 30% (1-2lpm cannula or 24-28 AEM venturi mask)
Amount of oxygen dissolved in the blood plasma
PaO2
Pulse Ox
measures oxyhemoglobin saturation of ARTERIAL blood (SpO2)
What % O2 can be delivered through venturi
24/28/35/50
nasal catheter
1/4 to 5L with variable O2 of 22-45%
