Überlegungen zur Stellatum-Blockade
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Considerations on the blockade of the stellate ganglion
In carrying out the blockade of the stellate ganglion it is possible that the vertebral artery or vein, both of which lie on the first rib in the scaleno-vertebral triangle, may be pierced. Although the previous aspiration test for blood had a negative result, the tip of the needle even when held perfectly still could nevertheless puncture one of these vessels. The reason could be that the injected local anaesthetic spreads between the vessels and the hard supporting first rib thus lifting the vessels towards the point of the needle. Therefore it is to be recommended to interrupt the injection with 15–20 further aspiration tests.