Differences in Radial and Ulnar Artery Size in Young Children

This is a prospective observational study that requires measurement of the size of both arteries in both upper extremities using ultrasound. These will be performed after the induction of anesthesia prior to the start of the surgical procedure. The primary objective of this study is to evaluate differences in the size of the radial and ulnar artery in a single extremity and then compared to the non-dominant extremity.

Inclusion Criteria: * ASA 1-3 patients undergoing a surgical procedure requiring general anesthesia. Exclusion Criteria: * Patients with known abnormalities in their vasculature. * Patients with a previous history of radial/ulnar artery cannulation or puncture. * Patients with a history of significant upper extremity trauma. * Patients with a history of congenital abnormalities of the upper extremities. * Patients with acquired or congenital comorbid conditions known to affect vascular size or development.