Difference between the single wall and the double wall technique

Difference between the single wall and the double wall technique

To perform a single-wall technique, only the ventral wall of the vessel is punctured to gain entry to the vessel. A double-wall puncture (Seldinger technique) is performed by puncturing the dorsal and ventral walls of the vessel and subsequently withdrawing the needle. When pulsatile blood is encountered, the tip of the needle is in an intraluminal position, and a guidewire can be placed safely.

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