L4.3 UL vessels

Question 1

Subclavian A

Answer 1

Subclavian: Origin: Outer border of 1st ribs

Question 2

Axillary A.

Answer 2

• Axillary → extends to INF border of teres maj
  
  • Divided by pec minor:
    
    • Before: 1 branch
    • Middle: 2 branch
    • After: 3 branch
      
      • All supplies the walls of axilla

Question 3

Brachial A

Answer 3

Brachial (below teres maj) → (branch) Profunda A → ~ back of humerus → supplies triceps

Question 4

Radial A

Answer 4

• Radial A (lat side): under brachioradialis, winds backwards at insertion of brachioradialis → through anatomical snuff box → pierces 1st dorsal interosseous → into palm
  
  • Divided into:
    
    • Superior branch
      
      • Completed by superior branch of ulna A → superior palmar arch
    • Deep branch
      
      • Deep palmar arch → completed by deep palmar branch of ulna A
        
        • Btw Carpal bones & interossei
        • Gives series of deep MC A

Question 5

Ulna A

Answer 5

• Ulna A (med) – under flexor carpi ulnaris
  
  • Gives branch off around 1cm from origin
    
    • Common interosseous A (deep btw bones)
      
      • ANT of interosseous membrane – innervate deep muscles
      • POS of interosseous membrane – muscles of POS compartment of forearm
  • Superficial to flexor retinaculum → enters palm ∴exposed to laceration
  • Branches into
    
    • Superficial (curves laterally) → Common palmar digital A → Proper digital A (one for each side of finger)
    • Deep

Question 6

Deep Veins

Answer 6

• Follows A
• Ulna & radial V have venae comitantes (at least to elbow joint level)

Question 7

Superficial Veins

Answer 7

• Begins at dorsum of limbs → Dorsal venous arch in palm
• Cephalic Vein: (LAT)
  
  • ~ radial border of forearm → in front of elbow (ANT) → Lat to biceps → runs into delto-pectoral groove → clavipectoral fascia → goes deep to join the axillary V
    
    • *Gives off median cubital V (at elbow)*
• Basilic Vein: (MED)
  
  • From med of arch → ANT forearm (MED) → half up MED biceps → goes deep → joins brachial V → joins axillary

Question 8

Lymphs nodes

Answer 8

• All UL drains to axillary lymph nodes (UQ of chest wall also drains there)
• Deep: follows major A
• Sup: drains sup structures → follows superficial V
• • Pectoral (ANT) axillary
• Subscapular (POS) axillary
• Humeral (LAT) axillary
  
  • All drain to central axillary → into apical axillary