The brachial plexus runs across the first rib in close relationship to the subclavian artery

On top of the first rib the branches of the brachial plexus are located postero-superior to the artery

Align the pulsatile subclavian artery to the center of the monitor

Rotate and tilt the transducer to obtain the best possible SAX view of the pulsatile subclavian artery and brachial plexus nerve divisions

Adjust depth, gain and focus

The hyperechoic first rib has to be exactly underneath the vessel. The pleura is posterior to the first rib. (Note air artifact, periodic

It is important to locate the probe on top of the first rib

With in-plane needle approach the needle tip will impinge on the rib instead of producing a pneumothorax, if the needle is inserted too deep

The lowermost branches of the brachial plexus – originating from the C8 and T1 spinal nerve roots – run across the first rib in the corner between the rib and the subclavian artery

This is called the corner pocket

Local anesthetic has to be injected in the angle between the subclavian artery, the first rib and the bundle of nerve divisions

SA = subclavian artery

nd = bundle of nerve divisions

p = pleura

c1 = first rib

It is mandatory to insert the needle with in-plane technique for the supraclavicular brachial plexus block in order to minimize the risk of pneumothorax

– Position the patient supine with the head turned contralateral

– Align the anatomical target and the monitor in the same visual field

– Select a linear, high-frequency probe 15-10 MHz

– Place the probe is in the supraclavicular fossa in the coronal oblique plane

Stephan Kapral from Vienna was the first who presented an US guided nerve block with real-time visualisation of the target nerves and the perineural spread of local anaesthetic

It was a supraclavicular brachial plexus block

Kapral S, Kraff P, Eibenberger K, Fitzgerald R, Gosh M, Weinstabl C: Ultrasound-guided supraclavicular approach for regional anesthesia of the brachial plexus. Anesthesia & Analgesia, 78:507-513 (1994)

The first transcutaneous, supraclavicular brachial plexus block in history was performed approximately 100 years ago

The supraclavicular brachial plexus block targets the brachial plexus at the level of the zone of transition – where the trunks are transformed to fascicles just proximal to the clavicle