Respiratory 1 Flashcards
Capillaries occupy 70-80% of ______ surface area
alveolar
normal respiratory rate for newborn?
30-60
normal respiratory rate for early childhood?
20-40
normal respiratory rate for late childhood?
15-25
normal respiratory rate for adults
10-15
how many alveoli in the normal human lung?
300 million
what is an average tidal volume?
500 ccs
how much do we breathe per minutes?
6 Liters (similar to cardiac output)
what is the normal saturation?
100%
when do hear rales and crackles?
Will hear on inspiration
when do you hear rhonchi and wheezing?
Hear on expiration
if you hear wheezing on inspiration what type issue is it?
Upper airway
what is the I:E ratio?
1:2
do you breathe quicker in or out?
In
what does cobblestoning of pharynx indicate?
Allergies
why do people turn cyanotic
vasoconstriction; want to shunt all the blood to the brain
when percussion is dull, what can it be?
Flesh of the lung (full of crap, not air) consolidation
lots of fluid (pleural effusion)
If percussion is hyperessonance?
Lots of air (pneumothorax or emphysema)
when will you feel fremitus?
Consolidation
what are normal breath sounds?
Vesicular
when will you hear bronchial breath sounds?
Sounds like blowing through a hose
consolidation (pneumonia)
what does clubbing look like
convex nail (spoon)
what is clubbing a sign of?
chronic hypoxia
do you normally use other muscles besides the diaphragm to breath?
No
is hypoxia usually a late or early finding of respiratory failure?
Late sign
what is low pO2 in tissues?
Hypoxia
what is low oxygen in the blood?
Hypoxemia (see on ABGs)
what is normal p)2
70-80 mm Hg
what does the last number of the pH usually correlate with?
Carbon dioxide level
how much percentage of the air is oxygen?
21%
5 causes of hypoxia?
V/Q mismatch
altitude (rare unless lungs not working well)
alveolar hypoventilation (end stage process)
decreased diffusion (problem w/ alveoli and vessel)
Shunt (anatomic)
3 main parts of the lungs?
Bronchus
Alveoli
Capillaries
things that cause decreased diffusion
pulmonary fibrosis
emphysema
what is V/Q mismatch
too much blood, not enough air
too much air, not enough blood
what does 90 hemoglobin saturation correspond to a PO2 of?
60
is there a lot of difference b/w 90-100 hemoglobin saturation?
No, corresponds to about 60 and above O2
No problem with lung parenchyma
Not moving air in and out
Elevated pCO2, decreased pO2
Alveolar hypoventilation
when do you mostly see alveolar hypoventilation?
Drugs
obesity
CNS injury
neuromuscular weakness
blood flow goes through without having a chance at being oxygenated?
Shunt