Trachea
www.propofology.com
Dr. David Lyness
@Gas_Craic
ANATOMY & CONSIDERATIONS
Image: Wikipedia/Google Images
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Thyroid Cartilage
Annular Ligaments
Cricothyroid Membrane
Cricoid Cartilage
Extends from lower end of cricoid to carina
C6 - T5 (expir) or T6 (inspir)
-16-20 C Shaped Rings
- Posteriorly closed by non-striated trachealis muscle
- 10-12cm length in adults
- 15-20mm diameter in adults
- <1y = <4mm diameter
- Children diameter (mm) = roughly age
- Trachea more deeply rooted and mobile in children
Cricoid cartilage is D-shaped
SUPPLY
Upper 2/3 = Inferior Thyroid Artery Lower 1/3 = Bronchial Artery
Venous = Inferior Thyroid Vein
Nervous = Recurrent Laryngeal Nerve
URTract
LRTract
Anterior relations
o Skin, thyroid isthmus at 2nd – 4th tracheal rings
o Jugular arch with anterior jugular vein
o Strap muscles
o Manubrium and remnants of the thymus
o Inferior thyroid veins with brachiocephalic artery
o Skin, thyroid isthmus at 2nd – 4th tracheal rings
o Jugular arch with anterior jugular vein
o Strap muscles
o Manubrium and remnants of the thymus
o Inferior thyroid veins with brachiocephalic artery
Lateral relations
o Carotid sheath and RLN in tracheooesophageal groove
o Right lung and pleura
o Brachiocephalic artery
o Azygous veins
o SVC
Posterior
o Oesophagus
o Carotid sheath and RLN in tracheooesophageal groove
o Right lung and pleura
o Brachiocephalic artery
o Azygous veins
o SVC
Posterior
o Oesophagus
