This study aims to investigate that performing supracondylar humerus fracture operations during daylight hours may have better results than performing them at night.

Supracondylar humerus fractures are one of the most common traumatic fractures seen in children and their treatment usually requires immediate closed reduction and percutaneous pinning (CRPP). The presence of neurovascular complications associated with this fracture is considered an orthopedic emergency. For this reason, depending on the patient's operation time, the procedure should be performed at night under emergency conditions. Sleep deprivation, which is common in healthcare professionals, may affect patient safety due to disruptions in treatments and surgical procedures by reducing physician performance.

Inclusion Criteria:

• aged 5 to 12 years
• had supracondylar humeral fractures,
• underwent CRPP
• under general anaesthesia
• American Society of Anesthesiologists (ASA) physical status I to III

Exclusion Criteria:

• Surgical procedures outside the operating room
• parental refusing the study protocol

paediatric population with supracondylar humeral fractures