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Case report demonstrates pulsed-wave Doppler ultrasound identifying intrathecal catheter tip placement in an epidural procedure, highlighting its utility for verifying catheter position.
Currently, no gold standard method exists for localization of an epidural catheter after placement. The technique described in this report uses pulsed-wave Doppler (PWD) ultrasound to identify intrathecal location of an epidural catheter. A thoracic epidural catheter was inserted after multiple trials with inconclusive aspiration and test dose. Ultrasound PWD confirmed no flow in the epidural space and positive flow in the intrathecal space. A fluid aspirate was positive for glucose, reconfirming intrathecal placement. PWD is a potential tool that can be used to locate the tip of an epidural catheter.
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Elsharkawy et al. (2017) studied this question.
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