lecture-2-pleural-cavity-&-lungs Flashcards
parietal pleura
outer layer somatic sensation - acute perception to pain and pressure
usually localized
can be referred
visceral pleura
inner layer visceral sensation - poor/no perception of pain; felt via autonomic fibers POORLY localized lack of sensation in the visceral pleura = why tumors are NOT felt untill they are large
pleural cavity
space between parietal and visceral pleura filled with capillary fluid pressure in cavity allowing lung to expand
pleural effusion
buildup of fluid in the pleural cavity
pleura is ____ ribs (above/below) the lungs
pleura is __2__ ribs _BELOW_ the lungs
mid-inspiration the INFERIOR BORDERS of the LUNG and PLEURA cross these ribs at indicated reference lines
Lungs
Midclavicular 6
midaxillary 8
scapular 10
Pleura
Midclavicular 8
midaxillary 10
scapular 12
Right lung: fissures lobes
oblique and horizontal fissures
3 lobes - upper, middle, lower
upper = anterior
lower = posterior
Left lung: fissures lobes
oblique fissure
2 lobes:
upper and lower
upper = anterior
lower = posterior
which lung makes room for the heart
left
which lung has the lingula
left
which lung has the cardiac notch
left
where is the lingula located?
at the INFERIOR part of the SUPERIOR LOBE of the LEFT lung
when listening to respirations on the ANTERIOR chest, stethoscope is placed where?
more superiorly (upper lobe)
when listening to respirations on the POSTERIOR chest, stethoscope is placed where?
more inferiorly (lower lobe)
the trachea divides into the right and left (primary/main) bronchi at what landmark?
sternal angle of louis (2nd rib)
what causes the cough reflex
carina when the ridge where the bronchi divide is irritated = cough reflex
aspirated objects are more likely to lodge in the
aspirated objects are more likely to lodge in the __ RIGHT MAIN BRONCHUS___
***because it is wider and more vertically in line with the trachea
pulmonary Arteries are
intrAsegmental
pulmonary vEins are
intErsegmental
bronchiole
without cartilage
have alveoli
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pleural effusion
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aspirated object
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hemi-diaphragm
parasympathetic innervation of the lungs
vagus nerve
aka cranial nerve X
vasodilates lung vessels
bronchoconstricts
increases mucus
returns body to peaceful state
sympathetic innervation of the lungs
sympathetic chain
vasoconstricts systematic vessels (incr. blood pressure, HR, Stroke Volume)
VasoDILATES coronary arteries (incr. Blood flow in Heart)
bronchodilates (incr. air flow)
decreases mucus
Diaphragm innervation
Phrenic Nerve (C3, C4, C5)
“C3, 4, 5 keep the diaphragm alive”
Motor N. to diaphragm
sensory to diaphragm
sensory to mediastinal pleura
Diaphragm injury results in ______ pain
Diaphragm injury results in ___REFERRED___ pain
Diaphragm injury
Sensation is felt in the ____
Diaphragm injury
Sensation is felt in the ___NECK and SHOULDERS___
think brachial plexus
Diaphragm __(rises/drops)__ during inspiration to __(increase/decrease)__ thoracic volume
Diaphragm __(rises/DROPS)__ during inspiration to __(INCREASES/decrease)__ thoracic volume
if the phrenic nerve is damage then a hemi-diaphragm will appear _______ on chest x-ray on THAT side
if the phrenic nerve is damage then a hemi-diaphragm will appear __ELEVATED__ on chest x-ray on THAT side
list the respiratory msucles involved in inspiration
Diaphragm
Intercostals
Neck
Pectoralis Minor
list the respiratory msucles involved in expiration
Relaxation
list the respiratory msucles involved in FORCED expiration
abdominal muscles
Pneumothorax
outside air gets into PLEURAL CAVITY
Lung shrinks (due to high degree of elastic recoil)
Mediastinum shifts to one side ==> stopping blood flow to the heart
Open Pneumothorax
air gets in and out of cavity
lung odes not expand
SUCKING SOUND
Closed / Tension Pneumothorax
“valve-like”
opening in chest wall/lung
air cannot escape pleural cavity during expiration
Treatment for Pneumothorax
Thoracocentesis
place hollow instrument at 2ND or 3RD ICS to remove fluid, blood, or pus
Lung Cancer
Pain in shoulder
Pancoast syndrome
tumor grows upward
Lung cancer
Difficulty lifting arm
Superior Vena Cava Syndrome
Vena Cava is compressed by tumor
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Left Sided Tension Pneumothorax
mediastinum, heart, trachea deviate to opposite side
Lung collapsed on side of lesion
Chylothorax
Lymph