Percutaneous Endoscopic Transforaminal Lumbar Interbody Fusion for the Treatment of Lumbar Spinal Stenosis: Preliminary Report of Seven Cases with 12-Month Follow-Up

Figure 1

Guided SAP resection device and its schematic working picture, the white arrow pointing to the primary guide pin and the red arrow pointing to the secondary guide pin and the arch being between them. (a) Holistic view of guided SAP resection device. (b) Holistic view of schematic working picture. (c) Hook-shaped front of the cannula restricted the depth of incision. (d) Feature view of the hook-shaped front.

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