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Lopez Barroso et al: Accuracy of a table‐bound reduction and drill guide system for minimally invasive sacroiliac screw placement in cats
Veterinary Surgery 1, 2026

🔍 Key Findings

  • Mean SI joint reduction was 94.25%, exceeding the 90% target considered important to reduce screw loosening
  • Mean sacral width purchase was 82.52%, with all screws achieving >60%—a threshold for reducing implant loosening risk
  • All 20 screws were accurately placed within the sacral body, confirmed via CT or radiographs
  • A 3D-printed drill guide and table-bound system facilitated consistent screw placement via minimally invasive technique
  • Craniocaudal and dorsoventral angles were well controlled (mean CCA = –1.22°, DVA = 0.71°), demonstrating accurate trajectory
  • No intraoperative complications were reported; all pilot holes drilled on first attempt
  • Use of fluoroscopy and orthogonal imaging enhanced surgical accuracy and reduced malposition risk
  • The system permitted screw placement through a sleeve that doubled as a muscle retractor, allowing implant delivery without disruption

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← Articles

Lopez Barroso et al: Accuracy of a table‐bound reduction and drill guide system for minimally invasive sacroiliac screw placement in cats
Veterinary Surgery 1, 2026

🔍 Key Findings

  • Mean SI joint reduction was 94.25%, exceeding the 90% target considered important to reduce screw loosening
  • Mean sacral width purchase was 82.52%, with all screws achieving >60%—a threshold for reducing implant loosening risk
  • All 20 screws were accurately placed within the sacral body, confirmed via CT or radiographs
  • A 3D-printed drill guide and table-bound system facilitated consistent screw placement via minimally invasive technique
  • Craniocaudal and dorsoventral angles were well controlled (mean CCA = –1.22°, DVA = 0.71°), demonstrating accurate trajectory
  • No intraoperative complications were reported; all pilot holes drilled on first attempt
  • Use of fluoroscopy and orthogonal imaging enhanced surgical accuracy and reduced malposition risk
  • The system permitted screw placement through a sleeve that doubled as a muscle retractor, allowing implant delivery without disruption

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Multiple Choice Questions on this study

In Lopez Barroso 2026 et al., on sacroiliac screw accuracy, what was the primary method used to confirm optimal drill trajectory?

A. Manual palpation
B. CT-guided navigation
C. Superimposition of radiopaque crosshairs and sphere
D. Vertebral alignment with spinous processes
E. Use of surgical compass

Answer: Superimposition of radiopaque crosshairs and sphere

Explanation: The device used a stainless-steel sphere and crosshair K-wires to confirm fluoroscopic alignment.
In Lopez Barroso 2026 et al., on sacroiliac screw accuracy, which component allowed the screw and washer to be delivered through the guide system?

A. Drill bit insert
B. Aiming crosshair
C. Sterile marker ring
D. Device sleeve
E. Screw driver

Answer: Device sleeve

Explanation: The sleeve served as a retractor and allowed passage of screw and washer through the guide.
In Lopez Barroso 2026 et al., on sacroiliac screw accuracy, which factor most likely contributed to caudal screw angulation in some cases?

A. Use of 2.7 mm screws
B. Improper guide diameter
C. Patient instability during surgery
D. Imperfect pelvic positioning
E. Poor soft tissue visualization

Answer: Imperfect pelvic positioning

Explanation: The study noted caudal angulation in many cases and attributed it to minor malalignment of the pelvis.

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