title: Effect of MRI strength and propofol sedation on pediatric core temperature change.
abstract: OBJECTIVE
  To determine core body temperature variations in children undergoing MRI exams on 1.5 Tesla (T) and 3T magnetic field strengths and with and without propofol sedation.
  
  
  METHODS
  Temporal artery temperatures were prospectively collected on 400 consecutive patients undergoing 1.5 Tesla (T) or 3.0T MRI scans. A cumulative logistic regression model was created using age, weight, MRI protocol, sedation status, pre-MRI temperature and MRI strength to assess risk of temperature change.
  
  
  RESULTS
  For patients with complete pre- and post-MRI temperature data, mean temperatures did not significantly change (-0.0155°C, 95%CI, -0.035, 0.064; n = 385). Temperature changes differed significantly between propofol-sedated and nonsedated patients (-0.26°C ± .44 versus 0.24°C ± 0.42; P < 0.0001), as did temperature changes for patients on the 3T (0.076°C ± 0.52) versus 1.5T (-0.06°C ± 0.48; P = 0.011). Sedation status, age, MRI strength, and MRI protocol accounted for 44.17% of temperature variance. The temperatures of 15 patients' (3.9%) decreased >1°C; 12 were on the 1.5T. All 7 patients (1.8%) who increased >1°C were non-sedates.
  
  
  CONCLUSIONS
  Clinically significant core body temperature change is uncommon in children undergoing MRI with different magnetic field strengths, and with and without propofol sedation.
authors: Medical College of Georgia, School of Medicine, Augusta, GA, USA. diane.isaacson@gmail.com
authors: Diane L
authors: DL
authors: Isaacson
authors: Daniel J
authors: DJ
authors: Yanosky
authors: Richard A
authors: RA
authors: Jones
authors: Nancy
authors: N
authors: Dennehy
authors: Philip
authors: P
authors: Spandorfer
authors: Amy L
authors: AL
authors: Baxter
mesh_terms: D000293:Adolescent; D000367:Age Factors; D018686:Anesthetics, Intravenous / Q000494:pharmacology; D015992:Body Mass Index; D001831:Body Temperature; D001835:Body Weight; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D007223:Infant; D008279:Magnetic Resonance Imaging / Q000379:methods*; D008280:Magnetics; D008297:Male; D010372:Pediatrics / Q000379:methods*; D015742:Propofol / Q000494:pharmacology*; D013699:Temporal Arteries / Q000473:pathology*
chemical_list: D018686:Anesthetics, Intravenous; D015742:Propofol