Importance of Safe Screw Placement

Pedicle screw-based stabilization has become the gold standard for treating spinal instabilities and deformities. However, accuracy of pedicle screw placement remains a critical issue in spine surgery.



The straight versions of the PediGuard probe include various tip shapes and diameters, and lengths to assist the surgeon in preparing the pedicle for screw placement at any level of the spine. The different tip diameters are Ø2.5 mm, Ø3.2 mm and Ø4.0 mm.

The PediGuard (Ø2.5 mm) XS probe addresses the challenges of penetrating hard bone with sharp cutting flutes at its tip. This probe can also be helpful in preparing small and/or narrow pedicles. The last graduated mark on this probe is 40 mm from the tip.


The curved versions of the PediGuard probe include a tapered tip. The tapered shape of the PediGuard Curved probe enhances the ease of penetrating through bone. Additionally, the curved shape at the distal end of the probe allows the surgeon to redirect the probe as necessary. The gradually increases from Ø2.5 mm at the tip to Ø4.0 mm at 30mm from the tip. The last graduated mark on the probe is 55 mm from the tip.

The PediGuard Curved XS probe is intended to facilitate preparation of small pedicles, while maintaining greater flexibility in directing the probe as it is being advanced down the pedicle. In this probe, the tip size gradually increases from Ø2.0 mm at the tip to Ø2.3 mm at 20mm. The last graduated mark on the probe is 50 mm from the tip.

The PediGuard Curved probe offers the following benefits:

  • A tapered tip to ease penetration through the pedicle and removal from the pedicle when drilling is complete.
  • A sense of directionality: as surgeons become comfortable with the direction of the curve, they can be aware of the location of a possible breach, and hence allow proper redirection.
  • Surgeons who prefer a curved gearshift will appreciate the tactile feel of the PediGuard Curved probe.


The PediGuard Cannulated probe is designed primarily for helping surgeons reduce radiation exposure during minimally-invasive (percutaneous) procedures. This probe can also be used to access and drill narrow and small pedicles.

This version of the PediGuard probe includes two parts – a modified Jamshidi needle, which incorporates the sensors, and a detachable handle, which houses the brains of the probe. The detachable handle improves surgical access and space by optimizing visualization during fluoroscopy and muting the probe when not needed to help direct in the drilling process. Additionally, the handle is designed to be ergonomic for enhanced surgeon grip. The teeth and conical shape of the cannula tip improves bone penetration and cannula stability. The universal Luer-lock thread at the cannula head eases stylet insertion and removal.

The Jamshidi needles embedded with the DSG Technology sensors are available with either the trocar or beveled tip design. The beveled-tip needle is intended to improve docking in bone and improve the surgeon’s ability to redirect while advancing the needle (with handle) through the pedicle. Needles of both designs are available in two lengths, the last graduated marks on the needles are 120mm and 160mm from the tip.