Temperature Changes During Sedated Pediatric Magnetic Resonance Imaging

Body Temperature Changes in Children Undergoing Magnetic Resonance Imaging Under Sedation

Magnetic resonance imaging (MRI) is widely used in pediatric patients and frequently requires sedation or general anesthesia. Both sedation and MRI-related environmental factors may influence thermoregulation. This prospective observational study aimed to evaluate body temperature changes in children undergoing MRI under sedation and to identify factors associated with these changes. A total of 285 pediatric patients (ASA physical status I-III) were included. Tympanic body temperature was measured immediately before sedation and after completion of MRI, and the temperature difference (ΔT) was calculated. Demographic, clinical, and environmental variables were analyzed to determine predictors of temperature change.

Inclusion Criteria:

• Age <18 years.
• American Society of Anesthesiologists (ASA) physical status I-III.
• Scheduled to undergo clinically indicated magnetic resonance imaging (MRI) under sedation.
• Written informed consent obtained from parent.

Exclusion Criteria:

• Age ≥18 years.
• ASA physical status IV-V.
• Known allergy to anesthetic medications used for sedation.
• Unstable vital signs prior to MRI.
• Fever (body temperature ≥37.5°C) before MRI.
• Severe pulmonary or cardiovascular comorbidities.
• Requirement for advanced airway management (laryngeal mask airway or endotracheal intubation).
• Refusal or absence of parental consent.