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Atlas of Human Body Ultrasound Scanning_ Methods and Diagnostic Applications ( PDFDrive ).pdf
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7  Vascular System Scanning

145

 

 

2.1.1\ Scanning Method

The patient lies in a supine position and stretches the upper limb out. The scanning of the proximal segment of the left subclavian artery is performed at the root of the neck superior to the sternoclavicular joint and suprasternal scanning of the distal segment of the subclavian artery below the clavicle. The 3–5 MHz low-frequency probe is used to scan if the image is not perfect.

2.1.2\ Sectional Structure

The longitudinal section of the left subclavian artery, left common carotid artery, and aortic arch are shown.

2.1.3\ Measurement Methods

The diameter and blood flow velocity of the left subclavian artery are measured.

2.1.4\ Clinical Significance

This plane can be used to judge whether there is stenosis or occlusion of the subclavian artery, arteriovenous fistula, subclavian steal syndrome, thoracic outlet syndrome (by pressing the subclavian vein), and other diseases.

2.1.5\ Note

The pulsed-Doppler blood flow spectrum of the subclavian artery shows high resistance. There may be no end-diastolic forward flow in females or older males.

146

B. Su and Q. Yong

 

 

2.2\ Longitudinal Scanning

of the Right Subclavian Artery

Fig. 7.16  Longitudinal section of the right subclavian artery

RCCA

IA

RSCA

7  Vascular System Scanning

147

 

 

2.2.1\ Scanning Method

The patient lies in supine a position and stretches the upper limb out. The scanning of the proximal segment of right subclavian artery is performed at the root of the neck superior to sternoclavicular joint and suprasternal scanning of the distal segment of the subclavian artery below the clavicle. The 3–5 MHz low-frequency probe is used to scan if the image is not perfect.

2.2.4\ Clinical Significance

This section can be used to diagnose subclavian artery lumen stenosis or occlusion, thrombi, venous fistula, subclavian artery steal syndrome, as well as thoracic outlet syndrome (subclavian artery and vein compression). It also can be used to find the diseases such as enlargement of the lymph node around the subclavian artery which appear lower echogenic.

2.2.2\ Sectional Structure

The long axis of the lumen of the right subclavian artery is shown in this section.

2.2.3\ Measurement Methods

The inner diameter and blood velocity of the right subclavian artery are measured.

2.2.5\ Note

The pulsed-Doppler blood flow spectrum of the subclavian artery shows high resistance. There may be no end-diastolic forward flow in females or older males.

148

B. Su and Q. Yong

 

 

2.3\ Longitudinal Scanning

of the Axillary Artery

Fig. 7.17  Longitudinal section of the axillary artery