Neurovascular Stuctures of Thoracic Cavity Flashcards
What does the right pulmonary artery parallel
secondary and tertiary bronchi to supply bronchopulmonary segments
What does the pulmonary aa do
deliver deoxy blood from RIGHT ventricle to root of lung
What do the pulmonary veins do
deliver oxygenated blood from lungs to left atrium
–located between septa therefore adjacent segments share pulmonary venous return
What is the difference between pulmonary circulation and bronchial circulation
Pulmonary: delivers blood for circulation
Bronchial: delivers blood to supply lung substance
What does the bronchial aa do
supplies lung and visceral pleura
How do the bronchial aa travel
Right Bronchial a branches from 3rd right posterior intercostal a
Follow bronchi to level of respiratory bronchiole where they anastomose with pulmonary a
Does the bronchial vv drain all of bronchial aa supply
no only part.
– the rest is returned via pulmonary vv
How do the bronchial vv compare to the pulmonary vv
smaller in diameter
Where do the right and left bronchial vv drain to
Right: azygos v
Left: Accessory hemiazygos v
What do the superficial lymphatic plexus drain and where does it drain to
Drains: Lung
Drains to: bronchopulmonary (hilar) nodes
What does the deep lymphatic plexus drain and where does it drain to
Drains: Root of the lung
Drains to: intrapulmonary, then bronchopulmonary nodes
What do the tracheobronchial nodes drain and where do they drain to
Drain: They are secondary lymph nodes for all of pulmonary lymphatics
Drain to: junction of the subclavian v and internal jugular v
What makes up the pulmonary plexus of nerves and where is it found
Presynaptic parasympathetics–from Vagus n
Postsynaptic sympathetics–usually T1-T5
visceral afferents
Which nerves to the visceral afferent nociceptive fibers run with
sympathetics
Which nerves do the visceral afferent reflexive run with
parasympathetics
What are the visceral afferents from the vagus nerve involved with
reflexive control of:
tactile sensation in bronchial mucosa (cough reflex)
stretch receptors in bronchial smooth muscle
pressure receptors in pulmonary aa (blood pressure)
chemoreceptorr in pulmonary vv (blood gases)
What causes a pulmonary collapse
surface tension between visceral and parietal pleurae is lost
elastic recoil will cause lung to expel air and collapse
What is pneumothorax
air entering the pleural cavity
What is a spontaneous pneumothorax
most common
results from bleb rupture of lung surface
What is open pneumothorax
wound to thoracic wall that pierces the parietal pleura leaving the pleural cavity open to outside air
–can lead to a tension pneumothorax
What is a tension pneumothorax
air pressure as result of open pneumothorax builds on wounded side pushing mediastinum towards the opposite side compressing the inflated lung
What is hydropneumothorax
fluid in the pleural cavity
What is pleural effusion
excessive fluid production by pleural membranes
What is hemopneumothorax
blood in pleural cavity from damage to vessels in thoracic wall
