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What Is an IV Catheter? Puncture Inserts the Outer Cannula and Stylet Together into the Vessel

By WHFS NeedlePublished on 8/26/20265 min read
What Is an IV Catheter? Puncture Inserts the Outer Cannula and Stylet Together into the Vessel

An introduction to IV catheters (vein detained needles): structure, puncture procedure, indications, and open/closed and safety types.

What Is an IV Catheter?

The IV catheter (Vein Detained Needle) consists of a stainless steel stylet, a soft outer cannula and a plastic hub. During puncture, the cannula and stylet are inserted into the vessel together; once the cannula is in place, the stylet is withdrawn and only the soft cannula remains in the vessel for infusion.

Indications: intermittent, continuous or daily intravenous infusion therapy. Scalp steel needles are limited to short-term or single-dose delivery, blood sampling, blood or blood product infusion, hemodynamic monitoring, and fluids that are near-isotonic and within normal pH range.

IV catheters are divided into open and closed types, each further divided into standard and anti-needlestick safety types.

IV cathetervein detained needlevascular accessinfusionsafety catheter
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