Marking the skin projection of the transverse process using ultrasound

To mark the skin for the location of the TP:

Place the transducer in a sagittal orientation with the tip of the TP centered on the screen, and mark a horizontal line at the center of the transducer (X).
With the transducer in an axial orientation and the tip of the TP centered on the ultrasound screen, mark a vertical line the center of the transducer (Y).
The needle entry point should be at the intersection of the two lines.

Graphic 134763 Version 2.0

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