UE Vasculature - Unit 2 JP

ASDO5000 Musculoskeletal Module - Video 6

Arteries of the Upper Limb Start with the …

Arch of aorta

Arch of aorta (3 Branch off Points)

Right side gives off one artery:

• 1) Brachiocephalic trunk

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Left side gives off 2 arteries:

• Left common carotid a.

• Left subclavian a.

Overview of Upper Limb Arterial Supply (5)

1) Subclavian a.

2) Axillary a.

3) Brachial a.

4) Radial a.

• Deep palmar arch

• Dorsal palmar arch

5) Ulnar a.

• Superficial palmar arch

What is the Transition point of Subclavian a.?

• Turns into the Axillary a.

• Landmark: 1st rib

What is the Transition point of Axillary a.?

• Turns into the Brachial a.

• Landmark: Inferior border of teres major m.

What is the Transition point of Brachial a.?

• Turns into the Radial a. and Ulnar a.

• Landmark: Distal to elbow

What is the Transition of Ulnar a.?

Turns into the Common interosseous a.

• Which divides into the Anterior and Posterior interosseous aa

Subclavian Artery Supplies blood Where (4)

Supplies

• head

• neck,

• Thorax

• scapular regions of the UE

Subclavian Artery Branches that supply the scapular region (4 Progression)

Step 1: Thyrocervical trunk

• Step 2: Suprascapular a. (ALSO Know This)

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• Step 2: Transverse cervical a.

  • Step 3:Superficial branch (neck)

  • Step 3: deep branch → Step 4: dorsal scapular a.

• This all gets blood to the back of the shoulder

Axillary Artery (3)

Becomes axillary a. when passes over 1st rib •

3 sections (divided by pectoralis minor m.)

• 1st section: 1 artery

• 2nd section: 2 arteries

• 3rd section: 3 arteries

Axillary Artery 1st section

• Superior thoracic a.

Axillary Artery 2nd section

Thoraco-acromial a. (PAC-D)

This artery supplies the bones and muscles

• Pectoral branch

• Acromial branch

• Clavicular branch

• Deltoid branch (Dont need to know)

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Lateral thoracic a

Axillary Artery 3rd section (3 OR 5)

1) Posterior circumflex humeral a.

2) Anterior circumflex humeral a.

3) Subscapular trunk(2)

• Circumflex scapular a. (wraping around the back of the scapula)

• Thoracodorsal a.

Anastomosis

• Communication of Arteries

Scapular Anastomosis (2)

Basically 2 Pathways in which blood can join different pathways in the scapular. (Goes backwards up an artery to go up the main source)

1. Suprascapular a.(Subclavian a. -> Thyrocervical trunk) to -> Circumflex scapular a. (• Axillary a. -> 3rd part -> Subscapular trunk)

2. Dorsal scapular a. (Subclavian a. -> Thyrocervical trunk) to -> Thoracodorsal a. (• Axillary a. -> 3rd part -> Subscapular trunk)

Brachial Artery (First Branch Off)

First branch off brachial a. is profunda brachii a.

• Travels to posterior humerus and descends in radial (spiral) groove with radial n.

• AKA Super Deep

Forearm / Hand Blood Flow

Radial a. and Ulnar a. continue down the forearm toward the hand, at which point they branch.

• In the hand, there are arterial arches (3):

1. Superficial palmar arch (primarily from ulnar a.)

2. Deep palmar arch (primarily from raDial a.)

3. Dorsal carpal arch (primarily from raDial a.)

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• Arches give off digital branches to the fingers

Veins in Respect to Arteries

• As they bring de-oxygenated blood back to the heart

• ALL the Arteries mentioned have a parallel vein with the opposite function

Three Superficial Veins We need to know

1) Cephalic Vein (Lateral)

2) Basilic Vein (Medial)

3) Median Cubital Vein (Connects the 2, Also the vein you get blood drawn from)