Vet Comp Orthop Traumatol 2020; 33(03): A1-A14
DOI: 10.1055/s-0040-1712864
Podium Abstracts
Georg Thieme Verlag KG Stuttgart · New York

Computed Tomographic Evaluation of the Accuracy of Minimally Invasive Sacroiliac Screw Fixation Using Intraoperative Fluoroscopic Imaging in Five Cats

Johnson KA
1   Department of Surgery, University Veterinary Teaching Hospital Sydney, Camperdown, New South Wales, Australia
,
Wills DJ
1   Department of Surgery, University Veterinary Teaching Hospital Sydney, Camperdown, New South Wales, Australia
,
Neville-Towle JD
1   Department of Surgery, University Veterinary Teaching Hospital Sydney, Camperdown, New South Wales, Australia
,
Podadera JM
2   Department of Radiology, University Veterinary Teaching Hospital Sydney, Camperdown, New South Wales, Australia
› Institutsangaben
Weitere Informationen

Publikationsverlauf

Publikationsdatum:
21. Mai 2020 (online)

Auch verfügbar auf
 

Introduction: Minimally invasive screw fixation of sacroiliac luxation with postoperative radiographic assessment has been reported in dogs and cats. This study reports on the postoperative computed tomographic (CT) evaluation of the accuracy of sacroiliac reduction and minimally invasive screw fixation using intraoperative fluoroscopic imaging in five cats.

Materials and Methods: Medical records between January 2016 and March 2017 of cats presenting to the University Veterinary Teaching Hospital Sydney (UVTHS) were reviewed. Included were cats with unilateral or bilateral sacroiliac luxation repaired with a sacroiliac screw that underwent postoperative CT. Percentage sacroiliac reduction, sacral screw purchase (pilot hole length/sacral width ratio), and screw angles were evaluated following multiplanar 3D CT reconstructions.

Results: Five cats with sacroiliac luxation (4 unilateral, 1 bilateral) were repaired with 2.4-mm (n = 1) and 2.7-mm (n = 5) diameter cortical bone screws. CT examination was performed at 22 to 409 days postoperatively. Median reduction of the sacroiliac joint was 92% (range: 28.4–100%) and 96.8% (range: 52.7–100%) in the craniocaudal and dorsoventral planes respectively. Median sacral screw purchase for unilateral repairs was 75.4% (range: 43.6–91.1%) and 21.8% (0–43.6%) for the bilateral repair. One screw placed in the bilateral repair was no longer located in the sacral body and one screw violated the neural canal.

Discussion/Conclusion: Minimally invasive screw placement was performed successfully for the surgical treatment of sacroiliac luxation in this group of cats. Screw loosening and inadvertent penetration of the neural canal were complications experienced. CT evaluation provides a useful method for postoperative assessment of sacroiliac reduction and screw placement.

Acknowledgment: There was no proprietary interest in this project.