Left posterior intercostal artery (Arteria intercostalis posterior)
Educational content only — not medical advice.
Anatomy
Runs along the costal groove beneath the inferior rib border with the vein and nerve, supplying intercostal muscles, parietal pleura, and cutaneous tissues.
Clinical notes
Must be avoided during chest tube insertion and thoracentesis by inserting the needle over the superior border of the lower rib to prevent hemothorax.
Related structures
Educational references
FAQ
What is the role of the Left posterior intercostal artery?
Runs along the costal groove beneath the inferior rib border with the vein and nerve, supplying intercostal muscles, parietal pleura, and cutaneous tissues.
Why is the Left posterior intercostal artery clinically important?
Must be avoided during chest tube insertion and thoracentesis by inserting the needle over the superior border of the lower rib to prevent hemothorax.
Source & license
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