THORACIC INLET
aijazahmedkhan7@live.com
Disclaimer / Declaration:
The study material included in this file and copied from relevant books / other sources are purely intended for the welfare of our medical students during COVID-19 lockdown
and are not for the purpose of publication and general circulation.
Objectives
• Define thoracic inlet
• Enumerate its boundaries
• List the contents [ Passing ‘Into’ & ‘Out of ’]
• Note Important relations
• Conceptualize the Suprapleural membrane
• Correlate with some applied aspects
Boundaries of the inlet
Boundaries of Thoracic Inlet
• Anterior
• Posterior
• Sides
• Shape- reniform
• Plane - 45 degree
• Diameters: 5/10 cm
Location & Orientation
Effect of upwards projection of diaphragm & inwards projection of shoulder
A Costal Arch (side view)
The plane of the inlet of the thorax
Relations of First Rib
Important relations ……..
Important relations …….
Important relations …….
Some structures at the root of the neck in relation to cervical pleura
Important relations
STRUCTURES PASSING THROUGH THE INLET OF THE THORAX
STRUCTURES PASSING THROUGH THE INLET OF THORAX
• Muscles
- Sternohyoid; Sternothyroid; Longus colli
• Viscera
- Trachea & Oesophagus - Apices of lungs with pleura - Remains of thymus
• Nerves
- Both vagus nerves - Both phrenic nerves - Both sympathetic trunks
- Both T1 when ascend to join BP - Lt. Recurr. laryngeal nerve
• Vessels
- Rt. brachiochepalic a.
- Lt. common carotid & subclavian aa - Both brachiocephalic veins
- Both internal thoracic arteries - Both superior intercostal arteries - Both first posterior intercostal veins - Inferior thyroid veins
- Thoracic duct
+ Arteria thyroidea ima
Thoracic inlet: Cervical dome of pleura & its relationship to the inner border of first rib
Important relations
Surface projection of parietal pelura & visceral pleura with lung
The parietal pleura as half cone
Suprapleural Membran: Surface view
Suprapleural Membran: Sectional view
APPLIED
Cervical rib
Thoracic inlet syndrome
Thoracic outlet syndrome
Cervical Rib Syndrome
Compressed subclavian a Poststenotic dilatation.
Fibrous band
Cervical Ribs on Both Sides
TIS vs TOS
Wasting of Small Muscles of Hand
Thank You
aijazahmedkhan7@live.com
Disclaimer / Declaration:
The study material included in this file and copied from relevant books / other sources are purely intended for the welfare of our medical students during COVID-19 lockdown
and are not for the purpose of publication and general circulation.
