Anesthesia-related critical incidents in pediatric patients occurred three times more frequently than in adults and, moreover, three times higher in infants (<1 year of age) than in children (>1 year of age). The overall incidence of critical events requiring intervention is 35%, most of them related to hypotension and hypoxemia episodes, occurring during the maintenance of anesthesia. The major risk factors in children undergoing anesthesia are age (<1 year), prematurity (<37 weeks of gestation), and comorbidity (American Society of Anesthesiologists [ASA] physical status ≥3). [1][2][3] Pediatric spinal anesthesia was initially described by August Bier in 1898, and its use was rather common before the advent of halogenated agents that made anesthesia safer. However, spinal block did not become popular again until 1980s, when Abajian first described the high-risk infant (subsequently defined as the ex-premature infant whose postmenstrual age [PMA] at surgery is <60 weeks) as a target patient for this technique, and over the last few years, due to the growing concern about the potential general anesthetic-induced neurotoxicity in young children. [4][5][6][7][8] While its current use is not so widespread, this technique has various advantages compared to general anesthesia, by reducing the risk of cardiorespiratory events (hypoxemia, bradycardia, and hypotension) associated with general anesthesia, especially in neonates and infants. The main limitation is the duration of the anesthetic block, which reduces the number of surgical procedures to be undertaken under this technique to those lasting less than 90 min. [9][10][11] The objective of this study was to review the pediatric spinal anesthesia program at our tertiary care center-Puerta del Mar