Advanced Trauma Life Support (ATLS) Practice Exam

In trauma resuscitation, the use of large-bore intravenous (IV) catheters is critical for effective fluid resuscitation and administration of blood products. A 16-gauge catheter is considered the minimum size for these purposes. This size allows for a sufficient flow rate to rapidly deliver fluids, which is essential in managing hypovolemic shock often seen in trauma cases.

The 16-gauge IV provides a balance between adequate flow while being manageable for most patients, ensuring quick access for the necessary resuscitation efforts. Larger gauges, such as 14-gauge, are often preferred in situations where rapid infusion is crucial and there is a risk of massive hemorrhage, but they may not be practical or necessary for all patients. Smaller sizes, like 18-gauge or 20-gauge, would not provide the necessary flow rates in urgent scenarios, making them less suitable as the minimum for trauma resuscitation. Therefore, a minimum of a 16-gauge IV catheter is the standard recommendation for ensuring effective trauma care.