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Fig. 1 | BMC Anesthesiology

Fig. 1

From: Ultrasonography-guided catheter-over-needle insertion for caudal epidural catheter placement in adults: technical considerations

Fig. 1

Ultrasound image of the sacral canal. (A) Transversal ultrasound image of the sacral canal; (B) Longitudinal ultrasound image of the sacral canal; (C) ultrasound Doppler image. Measurement of the distance between the two band-like structures (depth of the sacral canal at the apex of the sacral hiatus [line a]), distance from the skin to the inferior margin of the sacrococcygeal ligament (line b), and distance between the bilateral cornua ( line c) and the dorsal sacrococcygeal ligament thickness (line d) were obtained. (C) Unidirectional flow on color Doppler shows ropivacaine injection into the sacral canal. SC: Sacral cornua; SL: sacrococcygeal ligament; S: Sacral base

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BMC Anesthesiology

ISSN: 1471-2253

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