Flashcards in Lung Deck (208)
How are the lungs formed?
As small outpouching from the foregut at 5 weeks
What are the 4 stages of fetal lung development?
Pseudoglandular 5-15 wks
Canalicular 15-25 wks
Terminal sac 25-40 wks
Alveolar 40 wk-8 yrs
Which stage of fetal lung development is incompatible with extrauterine survival.
What stage of fetal lung development are early respiratory efforts seen?
In what stage of fetal lung development is surfactant produced?
An object aspirated is most likely to go into which stem bronchus? Why?
Right, it is more vertical (a wider angle)
How many lobes does the right lung have?
3, upper middle, and lower
How many lobes does the left lung have?
2, upper and lower
What is unique about the left lung?
It has a cardiac notch where the heart sits and a lingula (middle lobe homologue)
What is the most superior region of the lung?
What are the more medial portions of the lung that wedge in the heart?
What fissure do both lungs have?
What fissure does the right lung have that the left lung does not?
What are alveoli composed of?
Type I and Type II pneumocytes and macrophages
Which pneumocytes are responsible for gas exchange?
Which pneumocytes produce surfactant?
What is the alveolar septae also known as?
What is pulmonary hypoplasia?
decreased lung weight at time of birth
What causes pulmonary hypoplasia?
External compression on fetal thorax during development
What is a Tracheoesophageal fistula?
abnormal connection between trachea and esophagus
What is most common type of tracheoesophageal fistula?
Type C: blind ending upper esophagus and lower TEF
What are most TEF associated with?
Esophageal atresia and polyhydramnios
What is atelectasis?
collapse of a previously inflated lung
What are the symptoms of atelectasis?
hypoxemia, breathlessness, cyanosis, and respiratory distress
What is a compication of atelectasis?
Air stagnancy leading to infection
What are the different types of atelectasis?
Resorption, Compression, and Contraction
What is the most common type of atelectasis? and why does it happen?
Resorption, due to airway obstruction
What can cause resorption atelectasis?
Foreign bodies and mucous plugs
What is unique about resorption atelectasis?
it will cause the mediastinum to shift towards the atelectic lung