Abstract
Purpose: To determine if data transmission errors are related to electromagnetic interference (EMI).
Background: During NIRS measurement of cerebral oxygenation in neonates data misreads occurred in real time transmission at a rate of 10-15% of the data collection/subject.
Method: Data was collected from a neutral density filter array. The NIRO-500 was simultaneously on two computers. This procedure was repeated with/without: shielded cables, copper shields between devices, and ferrite beads installed on the cables.
Results: Rate of data misreads was unaffected except with ferrite beads, when misreads ceased. Data collections on both computers were identical. Data misreads only occurred at collection intervals longer than two seconds.
Discussion: Success with ferrite beads implies EMI may cause interference. The tests were not able to discriminate where the fault resides.
Conclusion: Application of ferrite beads to each terminal end of the cable linking the NIRO-500 to an auxilliary computer totally eliminated data interference faults during routine realtime data collection.
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Macnab, A., Gagnon, R., Smith, M. et al. 140 NEAR INFRARED SPECTROSCOPY (NIRS) INTERFERENCE FAULTS DURING NEONATAL DATA COLLECTION. Pediatr Res 36, 26 (1994). https://doi.org/10.1203/00006450-199407000-00140
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DOI: https://doi.org/10.1203/00006450-199407000-00140