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Bronchial Tree
www.propofology.com
Dr. David Lyness
@Gas_Craic
ANATOMY & CONSIDERATIONS
Image: Wikipedia/Google Images
TRACHEA > MAIN BRONCHI > LOBAR BRONCHI > SEGMENTAL BRONCHI > TERMINAL BRONCHIOLES > RESPIRATORY BRONCHIOLES
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23 Generations of the Airway
1-16 are Conducting
17-23 are Transitional/Respiratory
Tracheal to Terminal Bronchioles= ciliated pseudostratified columnar epithelium + goblet cells from the main bronchi downward.
No hyaline cartilage in the bronchioles - they have more smooth muscle
Mucous membrane also undergoes a transition from the above to simple cuboidal epithelium (from respiratory bronchioles down) to simple squamous epithelium.
RMB = 2cm long and more straight LMB = 5cm long
Right Bronchial Artery is from the 3rd Intercostal Artery
Left Bronchial Ateries = 2 = from arch of the Aorta
Bronchial Vein communicates with Pulmonary Vein
Left = Accessory Hemiazygous Vein
Right = Azygous Vein
T4
Bifurcation at carina = T4
Nerves
- Cardiac plexus around the bifurcation of the trachea - SNS T2 – T4 contributions
- PNS Vagus
Spinal cord injuries at C2/3 respiratory tetraplegia
Lower than C4 = 25% loss in vital capacity
Lower than C4 = 25% loss in vital capacity
