What is the size of a green IV catheter?

The size of a green IV catheter is indeed 18g. Catheters are color-coded for easy identification, facilitating quick and effective decisions in emergency situations. The 18g catheter is commonly used in trauma cases where rapid fluid resuscitation is needed due to its larger diameter compared to smaller gauges. This larger size allows for higher flow rates, which is crucial when managing patients with significant blood loss or those requiring immediate medication administration. Understanding the color coding of IV catheters helps healthcare providers to select the appropriate size based on the clinical scenario they are faced with.