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Effect of headphones on sevoflurane requirement for MRI

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Abstract

Background

Acoustic noise may have adverse effects, even in patients under general anesthetic.

Objective

We aimed to determine the effect of headphones on sevoflurane requirements in children undergoing general anesthesia for an MRI scan.

Materials and methods

Children scheduled for MRI were enrolled in the study. Sevoflurane was used for general anesthesia in all children. Patients were randomly divided into two groups, one to wear headphones and the other none. After reaching a predetermined end-tidal concentration, the MRI scan was initiated, and the patient was evaluated by an observer blinded to the concentration of sevoflurane. Awakening was defined as eye opening, onset of continued purposeful movement or phonation. Using the Dixon up-and-down method, each target concentration was determined by the response of the previous child in the same group.

Results

The study included 28 children undergoing MRI. There was a significant difference in ED50 between the two groups (0.92, 0.81–1.02, vs. 0.47, 0.42–0.63; P < 0.001). The times to spontaneous arm and leg movements, eye opening and discharge from the post-anesthesia care unit were significantly shorter in patients with headphones than in those without (P < 0.001). However, there was no difference in times to hospital discharge (P = 0.056).

Conclusion

Noise-concealing headphones decrease inhalational anesthetic requirements and facilitate recovery. We recommend the routine use of headphones in children undergoing an MRI scan.

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Conflicts of interest

The authors have no conflicts of interest to report.

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Authors and Affiliations

  1. Department of Anesthesiology, Adnan Menderes University, Aydin, Turkey

    Mustafa Oğurlu

  2. Department of Anesthesiology and Reanimation, GATA Military Hospital, Ankara, Turkey

    Mehmet Emin Orhan, Salih Çinar, Ertan Piri & Ercan Kurt

  3. Department of Biostatistics, Trakya University, Edirne, Turkey

    Necdet Sut

  4. Department of Outcomes Research, Cleveland Clinic, 9500 Euclid Ave., P-77, Cleveland, OH, 44195, USA

    Alparslan Turan

Authors
  1. Mustafa Oğurlu
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  2. Mehmet Emin Orhan
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  3. Salih Çinar
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  4. Ertan Piri
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  5. Ercan Kurt
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  6. Necdet Sut
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  7. Alparslan Turan
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Correspondence to Alparslan Turan.

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Oğurlu, M., Orhan, M.E., Çinar, S. et al. Effect of headphones on sevoflurane requirement for MRI. Pediatr Radiol 42, 1432–1436 (2012). https://doi.org/10.1007/s00247-012-2463-6

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  • DOI: https://doi.org/10.1007/s00247-012-2463-6

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