In our study, we aimed to evaluate the relationship between vitamin D levels and postoperative delirium in children who had undergone tonsillectomy and/or adenoidectomy.

Patients are assigned to one of two groups. Serum 25(OH)D level will be determined as <12 ng/ml group 1, group 2 with ≥12 ng/ml. ASA I-II children aged 2-10 years who will undergo adenoidectomy and/or tonsillectomy surgery under general anesthesia will be included in the study. In the operating room, the patient will monitored using electrocardiography, pulse oximetry, noninvasive blood pressure measurements, capnography. Under anesthesia, blood samples were taken for serum 25(OH)D levels. After extubation, patients will be taken to the recovery room. Delirium will be evaluated using the PAED (Pediatric Anesthesia Emergence Delirium) scale at 10-minute intervals in the recovery unit. In our study, 25(OH)D level was measured.

Inclusion Criteria:

• American Society of Anesthesiologists physical status I and II Tonsillectomy and/or Adenoidectomy Surgery

Exclusion Criteria:

• psychological disorders
• emotional disorders
• abnormal cognitive development
• developmental delay
• allergy to the drugs in our protocol

This was a prospective, single-center, double-blind, randomized study. The primary outcome was the presence or absence of presenting delirium with or without vitamin d deficiency.

Secondary outcomes, postoperative additional need analgesia. Children aged 2-10 years, ASA (American Society of Anesthesiologists) physical I or II scheduled for tonsillectomy were eligible, with or without adenoidectomy.