airway Flashcards
nasopharynx
where air passes after being inhaled through the nose, keeps contaminants like dust out of respiratory tract
oropharynx
back of the mouth, prevent food and liquid from entering the larynx when swallowing `
larynx
marks where upper airway ends and lower airway begins
upper airway
warm, filter, and humidify air, From nose and mouth to larynx
lower airway
gas exchange at lower alveolus, respiration
epiglottis
closes over airway to not allow other foreign material to enter
glotic opening
prevents foreign objects from entering airway
carina
where trachea (windpipe) divides into two bronchi
Main bronchi
left side, two lobes to leave space for heart
smaller bronchi
right side, three lobes, bronchiolies
inhalation
diaphragm and intercoastal muscles contract, allowing air to enter the body and lungs. (diaphragm moves down, thoracic cage gets bigger, ribs lift up and out)
partial pressure
amount of gas in air or a dissolved fluid
exhalation
doesn’t require muscular effort, passive process, the diaphragm relaxes, rib cage and thorax return to normal
air will reach the lungs only through the
trachea/windpipe
patent
airway is maintained, air can enter and leave lungs freely
tidal volume
amount of air moved in and out of lungs in ONE breath
hypoxia
tissues and cells don’ get enough oxygen, can lead to death
normally, the drive to breathe is based on ___
carbon dioxide, carbonic drive
hypoxic drive
drive to breathe is based on oxygen (BAD), cant get rid of CO2 –> high carbon dioxide levels, in patients with chronic obstructive pulmonary disease (COPD)
dyspnea
shortness of breath
child vs adult airway
child has:
-smaller nose and mouth
-more space taken up by tongue –> less space in airway
narrower trachea
-cricoid cartilage is less developed and less rigid
hypercarbia
excess carbon dioxide in blood stream
signs of inadequate breathing
-Tripod position: bent over with hands on knees
-Unequal or inadequate chest expansion
-Increased effort to breathing
-Shallow depth
-Skin that is pale, cyanotic, cool, or moist
-Skin puling in around ribs or clavicles during inspiration
-Abnormal skin color
-Altered mental status
-Low pulse oximetry
intrapulmonary shunting
blood enters the lungs on the right side and returns to the left side in an un-oxygenated state
Pulse oximetry
measurement of pxygenation in the blood, 95-99% is normal
Chronic obstructive pulmonary disease
-inflamed lungs –> blocked airmway
-too much CO2
-have low pulse oximetry (less oxygen in blood)
when to give oxygen
pulse oximetry less than 94%, dyspnea, changes in skin color, tripod position, accessory muscle use, nasal flaring , grunting
non rebretahing mask
(non dying mask), supplemental oxygen for for someone who is breathing FINE, 10-15 liters per min minute =90% oxygen
how much oxygen is in the air right now
21%
-body breathes out 5% and keeps 16%