Arteries and Aorta Branches

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Questions and Answers

A patient presents with a thrombus in the axillary artery's first part. Which artery would be LEAST affected by this occlusion?

  • Superior thoracic artery
  • Lateral thoracic artery
  • Subscapular artery (correct)
  • Thoraco-acromial artery

Following a traumatic injury, a patient exhibits impaired abduction of the arm. If the injury affects the third part of the axillary artery, which branch would MOST likely be involved?

  • Superior thoracic artery
  • Lateral thoracic artery
  • Anterior circumflex humeral artery (correct)
  • Thoracoacromial artery

A surgeon needs to ligate a branch of the axillary artery during a mastectomy. To minimize compromise to the vascular supply of the latissimus dorsi muscle, which artery should be spared?

  • Lateral thoracic artery
  • Superior thoracic artery
  • Thoracodorsal artery (correct)
  • Thoracoacromial artery

A patient has a blood clot which blocks the axillary artery after the first branch. Which artery is still providing sufficient blood flow?

<p>Superior thoracic artery (C)</p> Signup and view all the answers

During a surgical procedure, a vessel is encountered that originates from the inferior border of the pectoralis minor muscle. What artery is most likely?

<p>Lateral thoracic artery (B)</p> Signup and view all the answers

Occlusion of which artery would MOST severely compromise blood supply to the elbow joint?

<p>Brachial artery (C)</p> Signup and view all the answers

A patient presents with ischemia in the anterior compartment of the arm due to arterial occlusion. Which artery is MOST likely affected?

<p>Brachial artery (C)</p> Signup and view all the answers

If a surgeon damages the profunda brachii artery during a mid-humeral fracture repair, which anatomical region would MOST likely experience reduced blood supply?

<p>Posterior compartment of the arm (A)</p> Signup and view all the answers

A patient requires a catheter to be inserted into the heart. Which artery provides the MOST direct route?

<p>Subclavian artery (C)</p> Signup and view all the answers

Blood supply to the medial side of the index finger is MOST likely derived from which artery?

<p>Radialis indicis artery (D)</p> Signup and view all the answers

A surgeon is planning a procedure involving the anatomical snuffbox. Damage to which artery poses the GREATEST risk?

<p>Radial artery (A)</p> Signup and view all the answers

If a deep laceration occurs on the anterior forearm, severing the common interosseous artery, which subsequent arterial supply would be MOST immediately affected?

<p>Anterior interosseous (C)</p> Signup and view all the answers

Collateral circulation around the elbow joint is formed by several arteries. Which set of arteries contributes to this network?

<p>Radial recurrent and interosseous recurrent arteries (B)</p> Signup and view all the answers

A patient loses function in the deep compartment of their forearm. Which artery is MOST likely blocked.

<p>Posterior interosseous artery (A)</p> Signup and view all the answers

A complication of drawing blood from the medial cubital vein is inadvertently puncturing a nearby nerve. Which nerve is MOST at risk?

<p>Medial cutaneous nerve of the forearm (D)</p> Signup and view all the answers

After a crushing injury to the hand, a patient exhibits impaired adduction of the thumb. Which arterial branch is MOST likely compromised?

<p>Deep palmar (A)</p> Signup and view all the answers

Which vein is MOST commonly used for drawing blood?

<p>Median cubital vein (B)</p> Signup and view all the answers

During a subclavian vein catheterization, a resident accidentally injures the subclavian artery. Which arterial branch arises directly from the aorta?

<p>Brachiocephalic trunk (B)</p> Signup and view all the answers

Which structure does the cephalic vein pierce before joining the axillary vein?

<p>Clavipectoral fascia (D)</p> Signup and view all the answers

If the radial artery is damaged proximal to the wrist, but distal to origin of the radial recurrent artery, which structure would still receive direct blood supply?

<p>Elbow joint (A)</p> Signup and view all the answers

What artery provides the primary blood supply to the thumb?

<p>Princeps pollicis artery (C)</p> Signup and view all the answers

What anastomoses with the superficial palmar arch?

<p>Superficial palmar branch (C)</p> Signup and view all the answers

Where does the subclavian artery become the axillary artery?

<p>At the lateral border of rib 1 (D)</p> Signup and view all the answers

Where is the brachial artery located?

<p>In the anterior compartment of the arm (A)</p> Signup and view all the answers

Which artery supplies the medullary cavity of the humerus?

<p>Nutrient artery (B)</p> Signup and view all the answers

Which arteries terminate as dividing into radial and middle collateral arteries?

<p>Profunda brachii artery (D)</p> Signup and view all the answers

Which artery passes through the triangular interval and radial groove?

<p>Profunda brachii artery (D)</p> Signup and view all the answers

The Brachiocephalic trunk divides into which arteries?

<p>Right common carotid and right subclavian artery (A)</p> Signup and view all the answers

Which arteries supply the neck and upper limbs?

<p>Subclavian arteries (D)</p> Signup and view all the answers

At the lateral border of the teres major m., what artery becomes the brachial artery?

<p>Axillary artery (D)</p> Signup and view all the answers

What artery is the largest branch of the axillary artery?

<p>Subscapular artery (C)</p> Signup and view all the answers

Which artery contributes to the vascular supply of the posterior and medial walls of the axilla?

<p>Thoracodorsal artery (A)</p> Signup and view all the answers

What artery passes through the triangular space?

<p>Circumflex scapular artery (C)</p> Signup and view all the answers

Which artery passes through the quadrangular space?

<p>Posterior circumflex humeral artery (C)</p> Signup and view all the answers

What veins are classified as deep?

<p>Veins that typically have an artery with the same name close by (B)</p> Signup and view all the answers

Where do the veins orignate from?

<p>Dorsal venous network (B)</p> Signup and view all the answers

What joins to form the axillary vein?

<p>Basilic vein (D)</p> Signup and view all the answers

What unites with the subclavian vein to form the brachiocephalic vein?

<p>Internal jugular vein (D)</p> Signup and view all the answers

An elderly patient presents with severe atherosclerosis affecting the brachiocephalic trunk. What is the MOST likely consequence of this condition?

<p>Reduced blood supply to the right upper limb and the right side of the head and neck (A)</p> Signup and view all the answers

Aortic arch aneurysms can compress adjacent structures. Compression of which arterial branch of the aortic arch would MOST directly lead to decreased blood flow in the left arm?

<p>Left subclavian artery (B)</p> Signup and view all the answers

During a complex thoracic surgery, the arch of the aorta is inadvertently clamped proximal to the origin of the left subclavian artery. Which area would MOST likely maintain relatively normal perfusion due to collateral circulation?

<p>Right upper limb (B)</p> Signup and view all the answers

A patient undergoes a procedure requiring temporary occlusion of the subclavian artery distal to the thyrocervical trunk. What vascular structure would provide the MOST significant collateral flow to the axillary artery?

<p>Suprascapular artery via the circumflex scapular artery (B)</p> Signup and view all the answers

A patient presents with symptoms suggesting arterial insufficiency in the upper limb. Angiography reveals severe stenosis at the point where the subclavian artery transitions into the axillary artery. Where does this transition occur?

<p>At the lateral border of the first rib (C)</p> Signup and view all the answers

A rock climber falls such that they injure their axilla. They come to the ER complaining of pain and paresthesia in their arm. Upon diagnostic imaging, a lesion in the third portion of the axillary artery is found. Which of the following arteries would likely be unaffected?

<p>Superior thoracic artery (B)</p> Signup and view all the answers

During a surgical repair of a mid-shaft humeral fracture, the surgical team must carefully consider the path of the profunda brachii. Which anatomical landmark is MOST critical for the surgeons to use in locating this artery?

<p>The triangular interval (A)</p> Signup and view all the answers

An interventional radiologist is planning to perform an embolization procedure targeting a specific branch of the brachial artery. What anatomical region should the radiologist evaluate in determining where that branch is?

<p>The cubital fossa (B)</p> Signup and view all the answers

A patient presents with severe ischemia of the anterior compartment of the arm following a traumatic injury. Assuming a single arterial injury, occlusion of which main arterial trunk or its direct branch would MOST likely cause this condition?

<p>Brachial artery (C)</p> Signup and view all the answers

In a patient undergoing reconstructive surgery of the humerus, care must be taken to preserve the humeral nutrient artery. Occlusion of this artery would MOST directly compromise the:

<p>Medullary cavity of the humerus (C)</p> Signup and view all the answers

A surgeon is planning a complex elbow reconstruction. To fully understand the potential impact on blood supply, understanding the termination of the profunda brachii is critical. How does the profunda brachii terminate?

<p>By dividing into the radial and middle collateral arteries (A)</p> Signup and view all the answers

A patient presents with a gunshot wound to the forearm, resulting in a complete transection of the radial artery. Which compensatory mechanism would MOST effectively maintain blood supply to the hand immediately following the injury?

<p>Blood flow through the ulnar artery to the superficial palmar arch and contribution to the deep palmar arch (A)</p> Signup and view all the answers

A patient is diagnosed with thromboangiitis obliterans (Buerger's disease), affecting the radial artery within the anatomical snuffbox. This condition would MOST directly impair blood supply to which structure?

<p>The thumb and index finger (A)</p> Signup and view all the answers

Following a deep laceration on the anterior aspect of the distal forearm, a patient exhibits reduced blood flow to the deep palmar arch. Damage to which artery before it contributes to the deep palmar arch is MOST likely responsible?

<p>Radial artery (D)</p> Signup and view all the answers

A patient has a vascular abnormality. As a result, the superficial palmar arch is mainly supplied by the radial artery. Which artery would be primarily responsible for providing blood to the digital arteries of the hand?

<p>Radial artery (D)</p> Signup and view all the answers

An orthopedic surgeon is using a volar approach to fix a distal radius fracture. What artery and nerve is the surgeon MOST concerned about with this approach?

<p>Radial artery and median nerve (A)</p> Signup and view all the answers

A thrombus forms in the brachial artery just proximal to its bifurcation. This condition MOST immediately threatens the viability of tissues supplied by what arteries?

<p>Radial and ulnar arteries (D)</p> Signup and view all the answers

A patient presents with compartment syndrome in the deep posterior compartment of the forearm. Compression of which artery would contribute MOST directly to ischemia in this compartment?

<p>Posterior interosseous artery (A)</p> Signup and view all the answers

A surgeon ligates the ulnar artery just distal to the origin of the common interosseous artery to control bleeding. What artery could MOST likely provide some collateral blood flow distal to the ligation?

<p>Anterior interosseous artery (B)</p> Signup and view all the answers

A patient with an upper arm injury is noted to have a loss of pronation. Further exam reveals that the anterior interosseous artery is compressed. Which vessel has perforating branches that may supply the posterior compartment of the forearm?

<p>Anterior interosseous artery (A)</p> Signup and view all the answers

A surgeon needs to harvest the cephalic vein for a coronary artery bypass graft. What anatomical relationship must the surgeon consider MOST carefully to avoid complications during the cephalic vein harvest?

<p>The cephalic vein's passage through the clavipectoral fascia (A)</p> Signup and view all the answers

A patient requires a central venous catheter to be placed. During the procedure to access the subclavian vein, the nearby subclavian artery is nicked. If ligated, what vein could serve as an alternative bypass?

<p>Axillary vein (B)</p> Signup and view all the answers

A patient presents with thrombosis of the basilic vein in the mid-upper arm. This occlusion would MOST directly impede venous drainage from which region?

<p>The medial side of the forearm (C)</p> Signup and view all the answers

During a surgical procedure in the cubital fossa, a surgeon must carefully identify and protect the median cubital vein. Why is the median cubital vein a clinically important landmark in this region?

<p>It directly connects the cephalic and basilic veins and is a common site for venipuncture (D)</p> Signup and view all the answers

Flashcards

Arteries

Vessels that carry blood from the heart to the distal organs.

Aorta

The main artery of the human body.

Arch of aorta

The part of the aorta that curves to the left side after leaving the heart.

Brachiocephalic trunk

A branch of the aortic arch that divides into the right common carotid and right subclavian arteries.

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Common carotid arteries

Supplies blood to the head (brain) and neck.

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Subclavian arteries

Supply the neck and upper limbs.

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Axillary artery

The continuation of the subclavian artery after it passes the first rib.

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Brachial artery

The continuation of the axillary artery after it passes the lower border of the teres major muscle.

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1st part of axillary artery

Proximal section of the axillary artery, up to the pectoralis minor muscle.

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Superior thoracic artery

A small artery that supplies the upper regions of the medial and anterior axillary walls.

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Thoraco-acromial artery

Artery behind the pectoralis minor muscle, originating from the superior border.

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Clavipectoral fascia

Short artery that penetrates the clavipectoral fascia.

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Supplies the anterior axillary wall.

The anterior axillary wall.

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Lateral thoracic artery

Originates from the inferior border of the pectoralis minor m. and supplies the anterior and medial axillary walls.

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Subscapular artery

Largest branch of the axillary artery which divides into two terminal branches.

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Circumflex scapular artery

Artery that passes through the triangular space.

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Thoracodorsal artery

Artery that contributes to the vascular supply of the posterior and medial walls of the axilla.

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Posterior circumflex humeral artery

Curves around the surgical neck of the humerus after passing through the quadrangular space.

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Brachial artery (arm)

The main artery of the arm, continuation of the axillary artery.

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Humeral nutrient artery

Branch of the brachial artery that supplies the medullary cavity of the humerus.

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Profunda brachii artery

Accompanies the radial nerve in the radial groove of the humerus.

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Cubital fossa apex

The point where the brachial artery divides into the radial and ulnar arteries.

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Radial artery

Passes along the lateral aspect of the forearm, just deep to the brachioradialis muscle.

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Ends as deep palmar arch

Located on the thumb side of hand.

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Radial recurrent artery

Supply Elbow Joint.

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Superficial palmar branch

Anastomoses with the superficial palmar arch formed by the ulnar artery.

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Dorsal carpal arch

Radial artery branch giving rise to dorsal metacarpal aa.

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Radial artery (hand)

Lies deep in the adductor pollicis muscle, giving rise to two branches.

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Princeps pollicis artery

Main blood supply of the thumb comes from it.

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Radialis indicis artery

Supplies the lateral side of the index finger.

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Deep palmar arch

Passes between the two heads of the adductor pollicis muscle.

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Ulnar artery

Passes along the medial aspect of the forearm and is larger than the radial artery.

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Anterior ulnar recurrent a.

Contributes to an anastomotic network around the elbow joint.

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Anterior interosseous a.

Supplies the deep compartment of the forearm.

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Deep palmar artery

Accesses the deep plane of the palm and anastomoses with the deep palmar arch formed by the radial artery.

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Superficial palmar arch

Palmar artery that is superficial to the flexor tendons.

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Veins

Vessels carrying blood back from organs to the heart.

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Superficial veins

Located in the superficial fascia, not paired with an artery.

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Deep veins

Typically have an artery with the same name close by.

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Deep veins

Tributaries join and follow the arteries.

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Palmar digital veins

Interconnected networks of deep and superficial veins.

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Superficial veins

Originate from the dorsal venous network.

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Basilic vein

Runs on the medial side of the forearm.

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Cephalic vein

Runs on the lateral side of the forearm.

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Median cubital vein

At the roof of the cubital fossa, connects the cephalic and basilic veins

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Axillary vein

Passes through the axilla.

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Cephalic vein

Passes into the clavipectoral triangle between the deltoid, pectoralis major and clavicle.

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Subclavian vein

Unites with the internal jugular vein (blood from head and neck) to form the brachiocephalic vein.

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Superior vena cava

Joined by the right and left brachiocephalic veins.

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Study Notes

Arteries Overview

  • Arteries transport blood from the heart to the distal organs
  • Aorta is the main artery in the human body
  • After leaving the heart, the aorta arches to the left, forming the arch of the aorta
  • The arch of the aorta gives rise to 3 main branches

Branches of the Aorta

  • Brachiocephalic trunk
  • Left common carotid artery
  • Left subclavian artery

Common Carotid Arteries

  • Supplies blood to the head, including the brain, and the neck

Subclavian Arteries

  • Supplies blood to the neck and upper limbs

Transformation of the Subclavian Artery

  • At the lateral border of the first rib, the subclavian artery becomes the axillary artery
  • The axillary artery then passes through the axilla

Transformations of the Axillary Artery

  • At the lower border of the teres major muscle, the axillary artery becomes the brachial artery

Axillary Artery Divisions: First Part

  • Is proximal to the pectoralis minor muscle
  • Has one branch, the superior thoracic artery

Superior Thoracic Artery

  • A small artery supplying the upper regions of the medial and anterior axillary walls

Axillary Artery Divisions: Second Part

  • It is posterior to the pectoralis minor muscle

Thoraco-acromial Artery

  • It is a short artery originating from the superior border of the pectoralis minor muscle
  • Penetrates the clavipectoral fascia
  • Divides into four branches: pectoral, deltoid, acromial, and clavicular
  • Supplies the anterior axillary wall

Lateral Thoracic Artery

  • Originates from the inferior border of the pectoralis minor muscle
  • Supplies the anterior and medial axillary walls
  • Branches in women contribute to the blood supply of the breast

Axillary Artery Divisions: Third Part

  • It is distal to the pectoralis minor muscle

Subscapular Artery

  • The largest branch of the axillary artery
  • Provides the major blood supply to the posterior axillary wall
  • Divides into two terminal branches, the circumflex scapular and thoracodorsal arteries

Thoracodorsal Artery

  • Contributes to the vascular supply of the posterior and medial walls of the axilla

Circumflex Scapular Artery

  • Passes through the triangular space
  • Enters the infraspinous fossa

Anterior Circumflex Humeral Artery

  • Passes anterior to the surgical neck of the humerus
  • Anastomoses with the posterior circumflex humeral artery.

Posterior Circumflex Humeral Artery

  • Passes through the quadrangular space
  • Curves around the surgical neck of the humerus
  • Runs with the axillary nerve

Brachial Artery

  • Main artery of the arm
  • Found in the anterior compartment
  • Continuation of the axillary artery at the lower border of the teres major muscle
  • Terminates just distal to the elbow joint, dividing into the radial and ulnar arteries

Branches of the Brachial Artery

  • Humeral nutrient artery supplies the medullary cavity of the humerus
  • Superior and inferior ulnar collateral arteries supply the elbow joint

Profunda Brachii Artery

  • Largest branch of the brachial artery
  • Passes through the triangular interval and radial groove, running with the radial nerve
  • Passes to the posterior compartment and supplies that region
  • Terminates by dividing into radial and middle collateral arteries, which supply the elbow joint

Radial Artery

  • Passes along the lateral aspect of the forearm
  • Is just deep to the brachioradialis muscle
  • Passes around the lateral side of the wrist
  • Passes through the floor of the anatomical snuffbox
  • Passes between the metacarpals I and II
  • Ends as the deep palmar arch of the hand

Radial Recurrent Artery

  • Contributes to an anastomotic network around the elbow joint

Superficial Palmar Branch

  • Anastomoses with the superficial palmar arch, formed by the ulnar artery

Palmar Carpal Branch

  • Supplies the carpal bones and joints

Before Penetrating the Back of the Hand, the Radial Artery

  • The Dorsal carpal arch gives rise to three dorsal metacarpal arteries
  • Dorsal metacarpal arteries then divide into smaller dorsal digital arteries

First Dorsal Metacarpal Artery

  • Is also derived from the radial artery

Radial Artery in the Hand

  • Deep to the adductor pollicis muscle
  • Gives rise to the princeps pollicis and radialis indicis arteries

Princeps Pollicis Artery

  • Provides the main blood supply to the thumb

Radialis Indicis Artery

  • Supplies the lateral side of the index finger

Deep Palmar Arch

  • The radial artery passes between the two heads of the adductor pollicis muscle and becomes this arch
  • On the medial side of the palm, it communicates with the deep palmar branch of the ulnar artery

Palmar Metacarpal Arteries

  • Three palmar metacarpal arteries join the common palmar digital arteries from the superficial palmar arch

Perforating Arteries

  • Pass posteriorly and forms anastomoses with the dorsal metacarpal arteries from the dorsal carpal arch

Ulnar Artery

  • The artery passes along the medial aspect of the forearm and is larger than the radial artery

Ulnar Artery: Anterior and Posterior Ulnar Recurrent Arteries

  • Contribute to an anastomotic network around the elbow joint

Ulnar Artery: Common Interosseous Artery

  • Divides into anterior and posterior interosseus arteries

Anterior Interosseus Artery

  • Supplies the deep compartment of the forearm
  • Perforating branches supplies the posterior compartment of the forearm
  • Terminates by joining the posterior interosseus artery

Posterior Interosseus Artery

  • Supplies the deep compartment of the forearm

Ulnar Artery: The Deep Palmar Artery

  • It accesses the deep plane of the palm
  • It anastomoses with the deep palmar arch which is formed by the radial artery

Ulnar Artery: Superficial Palmar Arch

  • Superficial to the flexor tendons
  • Gives rise to the palmar digital artery of the little finger
  • Gives rise to three common palmar digital arteries
  • Common palmar digital arteries divides into proper palmar digital arteries

Veins: Overview

  • Veins carry blood from organs back to the heart
  • Classified as superficial and deep veins

Veins: Deep Veins

  • There is an artery with the same name nearby
  • Sometimes 2 deep veins run along with the artery

Veins: Superficial Veins

  • Located in the superficial fascia, not paired with an artery

Veins of Hand: Overview

  • The hand contains interconnected networks of deep and superficial veins

Veins of Hand: Deep

  • Follow arteries, like the palmar digital, palmar metacarpal, deep palmar venous arch, radial, superficial palmar venous arch, ulnar, brachial and axillary  

Veins of Hand: Superficial Veins origin

  • Originate from the dorsal venous network, found on the back of the hand

Cephalic Vein

  • It originates from the lateral side of the dorsal venous network
  • This vein passes over the anatomical snuffbox

Basilic Vein

  • It originates from the medial side of the dorsal venous network

Forearm: Superficial Vein

  •  Basilic vein runs on the medial side
  • Cephalic vein runs on the lateral side

Median Cubital Vein

  • Found on the roof of the cubital fossa, in the superficial fascia
  • Connects the cephalic and basilic veins, common site for blood drawing

Veins: Deep

  •  The axillary vein passes through the axilla
  • It becomes the subclavian vein as it crosses the lateral border of rib 1

Veins: Superficial

  • Cephalic vein passes into the clavipectoral triangle which  is between the deltoid, pectoralis major, and clavicle
  • Pierces the clavipectoral fascia 
  • Joins the axillary vein

Subclavian Vein

  • Blood from the upper limb unites with the internal jugular vein
  • They form the brachiocephalic vein

Brachiocephalic Veins

  • They join together to form the Superior Vena Cava
  • Then the the Superior Vena Cava drains into the right atrium of the heart

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