QS Study

The apex of the lung is an area above the impression of the first rib and its cartilage. The apex is rounded, and extends into the root of the neck, reaching from 2.5 to 4 cm. above the level of the sternal end of the first rib.

Shape – Rounded.

Situation

At the root of the neck. The summit of the apex is 3 to 4 cm above the first costal cartilage and 2.5 cm above the medial end of the clavicle.

Covering

The apex is covered by cervical pleura, which is strengthened externally by the supraplcural membrane. It extends into the root of the neck about 3 cm above the anterior end of the 1st rib and 2.5 cm above the medial one-third of the clavicle. It’s covered by cervical pleura and suprapleural membrane.

Apex of the Lung 2

Fig: Apex of the Lung

Relations

Infront:

  • Subclavian artery,
  • Scalenus anterior,
  • Subclavian vein.

Behind:

  • First sympathetic trunk,
  • First posterior intercostal vein,
  • Superior intercostal artery,
  • Ventral ramus of first thoracic nerve.

Laterally:

  • Scalenus medius muscle,
  • Lower trunk of brachial plexus.

Apex of the Lung 1

Medially:

Right lung:

  • Right brachiocephalic vein,
  • Brachiocephalic trunk,
  • Trachea accompanied by the right vagus nerve.

Left lung:

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