Respiratory Care-Low/High Flow O2 and devices

What is the difference between high and low flow O2 therapy

Low flow is varible and does not meet the demand of the pt. High flow the FiO2 is fixed and meets the demand of the pt

What happens to the FiO2 during inspiration on a low flow system

The FiO2 gets diluted therefore the FiO2 is less

What FiO2 flow is considered low concentration

<35%

What FiO2 flow is considered high concentration

>60%

Name the low flow devices

Nasal cannula, catheter, masks-simple, non-rebreather, and partial, reserviors

What is the FiO2 range for the cannula

24%-44%

What are the factors for low flows systems

Vt 300-700ml
RR<25
Normal breathing pattern

What are the flow rates for the cannula

0-6 l/min

What are flow rates & FiO2 for simple mask

30-60%
5-10 l/min

What are the flow rates & FiO2 for partial mask

40-70%
bag inflate

What are the flow rates & FiO2 for the nonbreather

80-100% (depending) Never 100% usually will have to do a cannula and the non breather
flow- until bag inflate

What are some advantages of low flow systems

Easy
comfortable
can eat/talk
inexpensive
catheter-good for short procedures

What are some disadvantages of low flow system

Can cause irritation, dryness, bleeding
policy humdify after 4 l/min
reservior- frequent replacement and no humdification
Catheter- affects secretion

What are some things you would trouble shoot for a low flow system

obstruction-nasty nose or line plugged
displacement-side of the face
Irritation

Which mask would be best to treat CO poisoning

Non-breather
it gives the highest percentage of FiO2

Can you use a simple mask on a pt who has a broken nose at 3 l/min and why

no, because the min flow is 5 l/min

When would you use a high flow system

Cheyne strokes
RR < 25
Larger than 700 ml Vt

What is the formula for high flow/magic box

(I+E) x VE/magic box
Magic box x flow meter setting

What are some advantages of high flow systems

constant predicable FiO2 and can control the humidity and temperature

What would be a factor you would use a non-breather

severe asthma attack
CO posioning

how would you trouble shoot a non-breather mask that is not deflating on inspiration

check and make sure the mask isn't leaking
check the flow (maybe starting flow is too high)
make sure pt is breathing

What is a disadvantage of high flow system

Distal flow-blocks obstruct line you will not know the amount of FiO2 delivered to the pt

True or False: a low-flow system is always less than 10lpm

False

Before entering the romm to start O2 therapy, you must verify?

the physicians orders- verify the order is was put and correct