Effect of MRI strength and propofol sedation on pediatric core temperature change

✍ Scribed by Diane L. Isaacson; Daniel J. Yanosky; Richard A. Jones; Nancy Dennehy; Philip Spandorfer; Amy L. Baxter

• Book ID: 102375875
• Publisher: John Wiley and Sons
• Year: 2011
• Tongue: English
• Weight: 132 KB
• Volume: 33
• Category: Article
• ISSN: 1053-1807
• DOI: 10.1002/jmri.22486

✦ Synopsis

Abstract

Purpose:

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.

Materials and 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.

Conclusion:

Clinically significant core body temperature change is uncommon in children undergoing MRI with different magnetic field strengths, and with and without propofol sedation. J. Magn. Reson. Imaging 2011;33:950–956. © 2011 Wiley‐Liss, Inc.