Published on 06/02/2015 by admin
Filed under Anesthesiology
Last modified 22/04/2025
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20 Arteries
Visible pulsations from arteries are observed when compression is applied with the transducer to soft tissue. The amount of compression necessary for this depends on many variables, including the blood pressure, size and depth of the artery, and proximity of the artery to bone. Adjusting the amount of transducer compression to elicit visible pulsations is the fastest way to identify arteries. In some cases it is necessary to apply Doppler. Arteries have thicker walls than veins and do not have valves. Almost every peripheral nerve has a long running path with accompanying artery or vein.
FIGURE 20-1 Short-axis view of the axillary artery in the axilla viewed with power Doppler.
FIGURE 20-2 Power Doppler imaging of the femoral artery and lateral circumflex femoral artery. The lateral artery overlies the femoral nerve and is a potential site for bleeding complications.
FIGURE 20-3 Superficial cervical artery is observed overlying the brachial plexus during interscalene block. A, B-mode sonogram. B, Power Doppler.
FIGURE 20-4 Long-axis view of femoral artery running under the sartorius muscle in the mid-thigh proximal to the adductor canal. The femoral vein also is seen in long-axis view. The femoral artery serves as a landmark for saphenous nerve block in the mid-thigh.
FIGURE 20-5 Arteries normally have a uniform caliber. In this case, aneurysmal dilatation of the axillary artery was detected. Short-axis view in the normal segment (A) and dilated segment (B) are shown, together with the long-axis view (C). Axillary block was performed away from this site where the artery appeared to be normal.
Atlas of Ultrasound-Guided Regional Anesthesia 2e
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