Why is it necessary to stabilize the hub of the catheter when disconnecting old tubing?

Stabilizing the hub of the catheter when disconnecting old tubing is essential to prevent occlusion and possible blood reflux. Maintaining a stable hub ensures that the catheter remains patent and reduces the risk of blood flowing back into the tubing, which can lead to clot formation and potentially compromise the infusion line. This action is particularly important because blood reflux can introduce contaminants into the system, create complications such as thrombus, and hinder subsequent infusions or interventions. By stabilizing the hub, the integrity of the catheter site is maintained, facilitating safer practice and ensuring that IV therapy can continue uninterrupted.