# Medium‐term outcomes of hybrid total hip arthroplasty in cats: Cemented femoral stem and cementless acetabular cup in 17 hips (2020–2023)

## TL;DR

This study shows that a specific type of hip replacement surgery in cats has good results and high owner satisfaction with few complications.

## Contribution

The study introduces hybrid THR in cats using a cemented femoral stem and cementless acetabular cup as a feasible and effective surgical option.

## Key findings

- Hybrid THR in cats had no intra- or postoperative complications.
- Owner-reported satisfaction was excellent with a mean sf-FMPI score of 2/36.
- Hybrid THR was successfully used as a revision strategy for recurrent hip luxation.

## Abstract

To describe the surgical technique, complications and outcome of hybrid total hip replacement (THR) in cats using a BioMedtrix cemented femoral stem and cementless acetabular cup.

A retrospective case series.

Cats undergoing hybrid THR between 2020 and 2023.

The present study was a retrospective review of medical records. Postoperative radiographs were reviewed and implant positioning measured. Owner‐reported follow‐up was obtained via questionnaire utilizing the short‐form feline musculoskeletal pain index (sf‐FMPI).

A total of 17 hybrid THRs were performed with two cats undergoing bilateral THR. A 12 mm BioMedtrix micro BFX acetabular cup was placed in all cats in combination with a CFX femoral stem. Follow up imaging demonstrated no change in implant position. No intra‐ or postoperative complications were reported. Hybrid THR was successfully performed in one case as a revision strategy for recurrent hip luxation following CFX THR. Owner‐reported follow‐up was obtained for 10 out of 15 cats (mean 438 days postoperatively; range, 185–1084 days). Overall satisfaction was excellent and the mean sf‐FMPI score was 2/36.

This study demonstrates that hybrid THR using a micro BFX acetabular cup is feasible in cats with a good medium to long‐term outcome. These results compare favorably to previous reports of feline THR.

Hybrid THR in cats has a low complication rate and high owner satisfaction. This technique should be considered for the management of coxofemoral disease in cats and can be considered for CFX cup revision.