Technique described by Sven-Ivar Seldinger in 1953. It was developed as a safer method of gaining access to cavity, in contrast to direct insertion of a catheter or passing a needle through a large trocar.
It relies on a needle to initially gain entry to the required cavity. A guidewire is passed through the needle. Once the guidewire is in place, the needle is removed. The catheter is then passed over the guidewire, though in some cases dilatation of the entry site is required to accommodate the catheter.
The guidewire is ingeniously formed with a soft end to avoid poking it through the other side of the vessel or cavity, by omitting the central stiffening wire in the terminal centimetre or so.
In arterial cannulation, placing the soft end of the Seldinger wire just inside the proximal end of the needle minimises mess. Another approach is to use the barrel of a small syringe as a combination handle, guide for the wire into the needle hub, and reservoir for the emerging arterial blood.
There is a Flash animation of placement of a venous catheter at http://www.frca.co.uk/article.aspx?articleid=100029
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- ↑ SELDINGER SI. Catheter replacement of the needle in percutaneous arteriography; a new technique. Acta radiologica. 1953 May; 39(5):368-76. Reproduction of original article (somewhat faint) available at The Seldinger technique. Reprint from Acta Radiologica 1953. AJR. American journal of roentgenology. 1984 Jan; 142(1):5-7. or direct pdf link.
- ↑ Higgs ZC, Macafee DA, Braithwaite BD, Maxwell-Armstrong CA. The Seldinger technique: 50 years on. Lancet. 2005 Oct 15-21; 366(9494):1407-9.(Link to article – subscription may be required.)