Ultrasound-Guided Percutaneous Release Procedures in the Lumbar Ligamentum Flavum by Acupotomy: A Cadaveric study

Figure 4

Measuring in the cadavers. A, the depth of acupotome penetration; B, the distance from the puncture site to the spinous process; C, the vertical distance from the puncture site to the horizontal line of the cornua sacralia; red Cross, puncture site; yellow, acupotomy.