Which of the following is a proper action when utilizing the radial band?

When utilizing the radial band, inserting 2mL of air back into the band before securing it is the proper action. This step is essential for ensuring that the radial band achieves the appropriate pressure to occlude the radial artery effectively while preventing complications. Proper inflation is critical to maintaining hemostasis after procedures that involve access through the radial artery.

Using a specific amount of air allows for customizable pressure application, which is necessary because different patients may require varying levels of compression based on factors like their vascular conditions or the specifics of the procedure performed. In this way, a controlled inflation can greatly enhance patient safety and comfort.

The other methods mentioned could lead to suboptimal outcomes. Releasing all air immediately would compromise the ability to maintain hemostasis, potentially leading to bleeding. Inflating the band with 25mL of air exceeds the typical recommendation and can increase the risk of complications such as ischemia. Additionally, removing the sheath before inflation could result in arterial bleeding, as the sheath usually aids in maintaining pressure on the vessel until the band is properly secured.