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Purpose <p>This prospective study aims to compare the clinical, radiographic, and computed tomographic (CT) findings of minimally invasive closed fluoroscopy-asisted reduction and cannulated screw fixation (MCF) versus open reduction (OR) with lag screws in cats with sacroiliac luxation (SIL).</p> Methods <p>Thirty-two cats with SIL were divided into two groups: MCF (<i>n</i> = 16) and OR (<i>n</i> = 16). In the MCF group, reduction was performed via a minimally invasive (MI) approach using fluoroscopy and a custom-made 3D K-wire guide, with stabilisation achieved using a 2.7&#xa0;mm partially threaded cannulated screw. In the OR group, reduction was performed via an open approach, and stabilisation was achieved using a lag screw. Clinical, radiographic, and CT evaluations were performed for all cases.</p> Results <p>The MCF group demonstrated significantly shorter surgical duration (<i>p</i> &lt; 0.001) and an earlier return to limb function compared to the OR group (<i>p</i> &lt; 0.001). Lameness scores were significantly lower in the MCF group during the first two postoperative weeks (<i>p</i> &lt; 0.001). Radiographically, the MCF group achieved significantly better restoration of the pelvic canal diameter ratio (PCDR) (Mean Difference = 0.091, 95% CI: 0.021–0.161, <i>p</i> = 0.012) and sacroiliac joint reduction ratio (SRO) (Mean Difference = 12.0, 95% CI: 5.76–18.20, <i>p</i> &lt; 0.001). Although radiation exposure was higher in the MCF group (<i>p</i> &lt; 0.05), the complication rate was significantly lower (18.8%) compared to the OR group (62.5%) (<i>p</i> = 0.029). The dorsoventral screw angle (DVA) (<i>p</i> = 0.012) and craniocaudal screw angle (CCA) (<i>p</i> = 0.632) were lower in the MCF group than in the OR group.</p> Conclusion <p>According to the results of this study the MCF technique using a guide is associated with shorter surgery duration, better anatomic reduction, fewer post-operative complications and faster recovery times. However, it does not seem to be a viable technique for delayed SIL cases in cats.</p>

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A comparative study of fluoroscopy-guided closed reduction with 3D-printed guide-assisted cannulated screw fixation versus open surgery with a lag screw fixation in 32 cats with sacroiliac luxation–fracture

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  • 发表日期：

    2026年4月29日

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  • Kamil Serdar İnal,
  • Can Nacar,
  • Elif Bağatır Kurban,
  • Taylan Önyay

摘要

Purpose

This prospective study aims to compare the clinical, radiographic, and computed tomographic (CT) findings of minimally invasive closed fluoroscopy-asisted reduction and cannulated screw fixation (MCF) versus open reduction (OR) with lag screws in cats with sacroiliac luxation (SIL).

Methods

Thirty-two cats with SIL were divided into two groups: MCF (n = 16) and OR (n = 16). In the MCF group, reduction was performed via a minimally invasive (MI) approach using fluoroscopy and a custom-made 3D K-wire guide, with stabilisation achieved using a 2.7 mm partially threaded cannulated screw. In the OR group, reduction was performed via an open approach, and stabilisation was achieved using a lag screw. Clinical, radiographic, and CT evaluations were performed for all cases.

Results

The MCF group demonstrated significantly shorter surgical duration (p < 0.001) and an earlier return to limb function compared to the OR group (p < 0.001). Lameness scores were significantly lower in the MCF group during the first two postoperative weeks (p < 0.001). Radiographically, the MCF group achieved significantly better restoration of the pelvic canal diameter ratio (PCDR) (Mean Difference = 0.091, 95% CI: 0.021–0.161, p = 0.012) and sacroiliac joint reduction ratio (SRO) (Mean Difference = 12.0, 95% CI: 5.76–18.20, p < 0.001). Although radiation exposure was higher in the MCF group (p < 0.05), the complication rate was significantly lower (18.8%) compared to the OR group (62.5%) (p = 0.029). The dorsoventral screw angle (DVA) (p = 0.012) and craniocaudal screw angle (CCA) (p = 0.632) were lower in the MCF group than in the OR group.

Conclusion

According to the results of this study the MCF technique using a guide is associated with shorter surgery duration, better anatomic reduction, fewer post-operative complications and faster recovery times. However, it does not seem to be a viable technique for delayed SIL cases in cats.