Stabilization of 82 sacroiliac luxations in 67 cats using two sacroiliac screws (2014-2023).

Objective: To describe sacroiliac luxation stabilization in cats using two screws and to report clinical and radiographic short-term outcomes.

Study design: Retrospective clinical cohort study.

Sample population: Cats (n = 67) with sacroiliac luxation.

Methods: Case records of cats presented for sacroiliac luxation stabilized using two screws per side affected, one lag and one positional, between 2014 and 2023 were reviewed. The percentage of sacral purchase (PoSP) for each screw, percentage of reduction (PoR), and pelvic canal width ratio (PCWR) were measured and calculated.

Results: Eighty-two sacroiliac luxations were stabilized. Two 2.0 mm screws were used in 69 cases; two 2.4-mm screws in nine cases, and one 2.4 mm with one 2.0 mm screw in four cases. The mean PoSPs for lag and positional screws were 46% ± 12 and 31% ± 11, respectively. The median PoR was 89% (41 to 100). The mean PCWR was 1.23 ± 0.11. Clinical follow up was available for 42 cats with 53 sacroiliac luxations at a median of 87 days (36 to 2503). The full function was noted in 34 patients (81%). Screw failure occurred in five sacroiliac joints (4.7%), including loosening (n = 3), and breakage (n = 2) of the positional screws (n = 1). Pelvic canal diameter was maintained in all cases.

Conclusion: Excellent functional and radiographic outcomes were obtained for cats with sacroiliac luxation stabilized with two sacroiliac screws.

Clinical significance: Feline sacroiliac luxation can be stabilized using two sacroiliac screws.