Objectives: Silicone tracheostomy tubes are a popular choice for pediatric patients with chronic tracheostomies due to their pliability and increased comfort. However, the presence of wire reinforcement causes them to be labeled "MR-conditional." The objective of this study was to understand practice patterns across radiology departments for obtaining MRI in children with MR-conditional tracheostomy tubes.
Methods: A survey consisting of 7 questions aimed at determining a facility's protocol for obtaining MRI in children with tracheostomy tubes was developed and administered via telephone to MRI technologists at US children's hospitals.
Results: 182 children's hospitals were identified and 59 responses were obtained across 30 states (32.4%). 19 sites (32%) were excluded as they were unable to perform MRI. All 40 facilities reported that they have a standard questionnaire for medical implants, however only 20 reported that tracheostomy tubes are included on that questionnaire (50%). 6 (15%) reported all MR-conditional tubes are changed to MR-safe ones. Of the remaining 34, protocols were as follows: 1 (2.9%) scans patients with conditional tubes for a maximum of 15 minutes, 5 (14.7%) only use a 1.5T magnet, and 28 (82.3%) reported following the manufacturer conditions. In terms of artifact, 3 sites change MR-conditional tubes to MR-safe if scanning the head, neck, chest, or abdomen (8.8%), 6 (17.6%) change the tube if scanning the head or neck, 15 (44.1%) change the tube only if scanning the neck, and 10 (29.4%) were not aware of issues with artifact.
Conclusion: Based on this survey of MRI technologists at US children's hospitals, there is no unified protocol for obtaining MRI in pediatric patients with MR-conditional tracheostomy tubes. A lack of standardized protocols may be contributing to unnecessary tracheostomy changes. Future research includes clearly defining the anatomical regions affected by wire-related artifact and developing a standardized MRI protocol for these patients.
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