Learning Objectives

After reading this article, you should be able to:

1. Describe the organisation of the superficial and deep venous systems of the upper limb
2. Identify the anatomical course of the major superficial veins
3. Explain the structure and function of the deep veins and venae comitantes
4. Apply venous anatomy to common clinical procedures such as venepuncture

The venous system of the upper limb is responsible for draining deoxygenated blood from the hand, forearm, and arm back to the heart. It is organised into two interconnected components:

• Superficial venous system
• Deep venous system

In this article, we will explore the anatomy of the veins of the upper limb, focusing on their anatomical course, structural features, and clinical relevance.

Superficial Veins of the Upper Limb

The superficial veins lie within the subcutaneous tissue, superficial to the deep fascia. The two principal superficial veins of the upper limb are the cephalic vein and the basilic vein.

Basilic Vein

The basilic vein originates from the dorsal venous network of the hand. It ascends along the medial aspect of the forearm and arm.

At the level of the lower border of the teres major muscle, the basilic vein pierces the deep fascia and joins the paired brachial veins of the deep venous system. Together, they form the axillary vein, which continues proximally to drain the upper limb.

Cephalic Vein

The cephalic vein also arises from the dorsal venous network of the hand. It ascends along the anterolateral aspect of the forearm and arm, passing anterior to the elbow.

At the shoulder, the cephalic vein travels within the deltopectoral groove, located between the deltoid and pectoralis major muscles. It then enters the axillary region through the clavipectoral triangle, where it drains into the axillary vein.

The cephalic and basilic veins are typically connected at the elbow by the median cubital vein, a clinically important venous channel.

Deep Veins of the Upper Limb

The deep venous system lies beneath the deep fascia and accompanies the arteries of the upper limb. These veins are usually arranged as paired vessels, positioned on either side of the corresponding artery, and share the same name.

In the arm, the brachial veins accompany the brachial artery. Arterial pulsations assist venous return, improving blood flow back to the heart. This paired arrangement of veins is referred to as venae comitantes.

Smaller deep veins include the radial and ulnar veins, which unite to form the brachial veins. The deep and superficial venous systems are connected by perforating veins, allowing blood to pass between the two systems.

Clinical Relevance: Venepuncture

Venepuncture is the procedure of gaining intravenous access, commonly performed to administer fluids or medications or to obtain blood samples.

The median cubital vein is the preferred site for venepuncture in many individuals. It is a superficial vein located anterior to the cubital fossa and is relatively fixed in position due to perforating veins that pass through the bicipital aponeurosis.

Its superficial location, consistent anatomy, and stability make the median cubital vein an ideal and safe site for venepuncture.