Paramedian scan

A paramedian longitudinal scan is used to count to an appropriate interspace and is done instead of using the iliac crest to estimate the L3-L4 interspace since it is much more accurate.

The probe is positioned over the lamina and angled slightly towards the midline. Proper positioning is achieved when the following structures can be seen:

Slide the probe up and down to view these structures at different interspaces.

Lumbar Spine Ultrasound Version 1.0

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