Related Experiment Video
Updated: Aug 16, 2026

Ultrasonographic Evaluation of Breast Cancer-related Lymphedema
Published on: January 12, 2017
[Phleborgaphic studies of subclavian vein compression at the shoulder girdle]
Abstract:
60 healthy persons without clinical signs of neurovascular compression at the shoulder girdle were investigated with phlebograms of the arm under various arm-positions. Venous obstruction could be demonstrated under hyperabduction and shoulder-retraction in 70 per cent of the phlebograms. A compression of the subclavian vein in extreme positions of the arm can therefore be demonstrated in a significant number of healthy individuals. A narrowing of the costoclavicular space and an impression by the head of the humerus seem tobe the most frequent mechanisms of compression. Repeated compression between clavicula and first rib leads to thickening of the vein wall, forced expiration (Valsalva) to temporary stasis. These mechanisms could be the reason for primary subclavian vein thrombosis in otherwise healthy individuals.
Related Concept Videos
Sites for measuring blood pressure
The Brachial Artery: Primary Site for Blood Pressure Measurement
Pre-Procedural Guidelines for Assessing Blood Pressure
Arteries of the Upper Limbs
Veins of Upper Limbs
The deep venous system is primarily composed of the ulnar and radial veins. The ulnar vein, which drains the fingers through the superficial palmar venous arches, and the radial vein, which serves the palms via the deep palmar...
Assessment of the Cardiovascular System III: Palpation
Jugular Venous Pressure (JVP) Measurement
Position the patient at a thirty- to forty-five-degree angle or in a semi-fowler's position. Look for the highest point of pulsation in the internal jugular vein and measure the vertical distance to the angle of Loius or sternal angle. A normal JVP is 3-4 cm above the...
Venous Thrombosis II: Clinical Manifestations and Diagnostic Studies

