25: UE Arteries Flashcards
Three regions of the subclavian: relation to anterior scalene
1st: proximal to anterior scalene
2nd: deep to anterior scalene
3rd: distal to anterior scalene
What does the internal thoracic A supply?
Anterior thoracic wall
Ascending cervical A supplies?
Lateral muscles of superior neck
Suprascapular A supplies?
Supraspinatus, infraspinatus
What can the deep branch of the transverse cervical artery replace if present?
Dorsal scapular A
Where does the supreme intercostal A travel?
In 1st intercostal space
Deep cervical A supplies?
Deep cervical muscles
Dorsal scapular A supplies?
Levator scapulae + rhomboids
Where does subclavian A turn into axillary A?
Distal to first rib
Three regions of axillary A in relation to pec minor M
1: proximal to pec minor
2: deep to pec minor
3: distal to pec minor
Superior thoracic A supplies?
1st and 2nd intercostal spaces, superior portion of serratus anterior
What can cause axillary aneurysms in region 1?
Repeated arm movements, like in baseball pitchers
What can an axillary aneurysm do?
Compress the brachial plexus, causing pain and loss of sensation
Four branches of the thoracoacromial trunk
- Pectoral
- Acromial
- Clavicular
- Deltoid
Four muscles supplied by the lateral thoracic A
- Pec major
- Pec minor
- Serratus anterior
- Intercostal M’s
Thoracodorsal A supplies?
Latissimus dorsi
Three things supplied by circumflex humeral A’s
- GH joint
- Head of humerus
- Surrounding musculature
If there is a bleed in the arm and a surgeon ligases an artery, where would they want to ligate the artery to stop bleeding?
Distal to the subscapular A - if ligation is between thyrocervical trunk and subscapular, there will be a reversal of blood flow due to scapular anastomosis, and will continue to feed into the brachial A
Where does axillary artery become brachial artery?
Distal to teres major
What N does the deep brachial A travel with?
Radial N
Two anastomoses in the lateral elbow + two in the medial elbow
Lateral
1. Middle collateral + interosseous recurrent
2. Radial collateral + radial recurrent
Medial
3. Superior ulnar collateral + posterior ulnar recurrent
4. Inferior ulnar collateral + anterior ulnar recurrent
What N does the superior ulnar collateral A travel with?
Ulnar N
Which is larger, radial A or ulnar A?
Ulnar A
How does the ulnar A enter the hand?
Traveling over the flexor retinaculum
How does the anterior interosseous A terminate?
Replaces the posterior interosseous A and feeds into the dorsal carpal arch
What A produces the interosseous recurrent A?
Posterior interosseous
Dorsal carpal arch
Formed by dorsal carpal branches of radial and ulnar A’s that wind around to the dorsal aspect of the hand
What does the dorsal carpal arch give rise to?
Four dorsal metacarpal A’s
What do dorsal metacarpal A’s form?
Dorsal digital A’s
Which A mostly supplies the superficial palmar arch? Which mostly supplies the deep palmar arch?
Ulnar A -> superficial palmar arch
Radial A -> deep palmar arch
Besides the radial and ulnar A’s feeding into the dorsal carpal arch, which other A does?
Posterior/anterior interosseous A
