Pain Assessment in the Perioperative Area

To assess the intensity of pain in children in the perioperative area during IV cannulation using a combination of EMLA cream and low-frequency USG probe. To assess the intensity of pain in children in the perioperative area during IV cannulation using a combination of EMLA cream and high-frequency USG probe and final comparison between these groups will assess the effect of ultrasound in the penetration of the drug into the skin.