Vasculature MD3 Flashcards
Subclavian aa
R branches off brachiocephalic trunk, L branches off aortic arch
- branches include: thyrocervical, internal thoracic, vertebral, costocervical, dorsal scapular
- becomes the axillary aa after passing rib 1
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Suprascapular aa
from thyrocervical aa (subclavian aa)
passes over suprascapular ligament (over scapular notch)
supplies supraspinatus? as well as various other sites
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Axillary aa
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subclavian aa becomes axillary aa after passing rib 1
axillary aa becomes brachial aa after passing lower border of teres major
3 segments split up by pec minor (1 medial, 2 posterior, 3 lateral)
1- superior thoracic
2- thoracoacromial, lateral thoracic
3- subscapular, ant & post circumflex humeral
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Superior Thoracic aa
- branch off 1st segment of axillary aa
- supplies 1st & 2nd intercostal spaces, superior portion of serratus anterior
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Thoracoacromial aa
- 2nd segment (first branch) of axillary aa
- 4 branches: pectoral, deltoid, acromial, clavicular
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Lateral Thoracic aa
2nd segment (second branch) of axillary aa
- supplies lateral structures of thorax & breast (serratus ant, pec major, intercostals)
- runs along with long thoracic nn?
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Anterior & Posterior Circumflex Humeral aa
- 3rd segment of axillary aa
- encircle surgical neck of humerus anastomosing laterally, larger posterior branch located in quadrangular space
- anterior supplies shoulder
- posterior supplies GH joint, deltoid, teres major & minor, long head of triceps?
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Subscapular aa
- 3rd segment of axillary aa
- divides into circumflex scapular (supplies dorsal scapular muscles) and thoracodorsal (supplies lats)
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Circumflex Scapular aa
- branch off subscapular aa
- supplies dorsal scapular muscles
- travels through triangular space/medial triangular space
- anastomoses with suprascapular aa in infraspinous fossa
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Thoracodorsal aa
- branches off subscapular aa
- supplies latissimus dorsi
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Basilic vv
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drains to axillary vv, which drains to subclavian vv
superficial
drains arm, forearm, hand
sometimes used in AV fistula creation for hemodialysis
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Cephalic vv
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communicates w/ basilic vv via median cubital vv
runs through deltopectoral groove to drain into axillary vv
used for IV access
superficial
drains hand, forearm, arm
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Deep artery of arm/Profunda brachii aa
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branch off of brachial aa just below teres major,
runs w/ radial nn along radial groove in posterior humerus
supplies deltoid and triceps brachii
Brachial aa
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anterior compartment
name change from axillary aa after teres major
runs w/ median nn
splits into radial & ulnar aa
supplies biceps & triceps brachii, coracobrachialis (major artery of arm)
Ulnar aa
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bifurcation of brachial aa
-> common interosseus, dorsal & palmar carpal, primarily superficial palmar arch (some deep)
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