When should lidocaine be applied in relation to cannulation?

Lidocaine should be applied after cleaning the cannulation site to ensure that the area is free of contaminants and pathogens before introducing any medications. Cleaning the site first, typically with an antiseptic solution, reduces the risk of infection and sets a sterile environment for the procedure. The application of lidocaine afterward allows it to anesthetize the area without introducing any potential bacterial contaminants that might be present if lidocaine is applied before cleaning. This practice aligns with infection control protocols and enhances patient safety and comfort during the cannulation process. Applying lidocaine in this manner helps to effectively numb the area when the cannulation is performed, while still adhering to best practices for site preparation.