The BVOA-CHR offers a novel framework for the prospective studies on THR and on a national/international scale. Initial complication rates from the BVOA-CHR are similar to previous studies.

The medical records of dogs receiving surgery for unilateral patellar ligament rupture between 1999 and 2012 at 12 multidisciplinary referral centres were reviewed. Forty-three cases were identified; 26 were traumatic in origin; almost one-third were iatrogenic, of which over three-quarters occurred as a complication following surgical stabilisation of patellar luxation. Treatment involved primary reapposition of the ligament (36 cases). The repair was protected by circumpatellar and/or transpatellar loop(s) of orthopaedic wire, nylon, polypropylene or polydioxanone suture (34 cases). Wire loops were more likely to require surgical removal compared with loops of other materials (P=0.0014). The stifle joint was immobilised postoperatively by the applications of a transarticular external skeletal fixator (taESF) in 17 cases and by external coaptation (EC) in 8 cases; in 18 cases, no postoperative joint immobilisation was provided. Complications specific to the method of immobilisation occurred in seven of the cases with taESF and six of the cases with EC. Revision surgery to address failure of repair was required in five cases. Outcome was classified as acceptable or good in over three-quarters of the cases (31/40) and poor in less than a quarter (9/40). These data highlight patellar ligament rupture as a complication of surgical stabilisation of patellar luxation.

An increase in ulnar trochlear notch radiopacity is a finding associated with fragmentation of the medial coronoid process in Labrador retrievers.

General rightsThis document is made available in accordance with publisher policies. Please cite only the published version using the reference above. Full terms of use are available: http://www.bristol.ac.uk/pure/about/ebr-terms and report owner-assessed outcomes.Methods: Entries into the British Veterinary Orthopaedic Association-Canine Hip Registry (BVOA-CHR) between September 2011 and December 2012 were reviewed separately and in conjunction with previous data. An online, owner-administered outcomes assessment questionnaire (modified from the Liverpool Osteoarthritis in Dogs (LOAD) questionnaire) was used to collect outcomes data from owners. Results:The incidence of surgeon and owner reported complications were 8.2% and 4.3% respectively. No significant association was identified between bodyweight, age, sex, breed or indication for THR and the incidence of complications. THR using the BFX cup/stem prosthesis had a significantly greater likelihood of complication compared to when using the CFX cup/stem prosthesis (p=0.002); a complication was 4.48 times more likely to occur when using the BFX cup/stem prosthesis versus the CFX cup/stem prosthesis. THR using the BFX cup/stem prosthesis had a significantly higher likelihood of complication compared to when using a hybrid prosthesis (BFX cup/CFX stem, CFX cup/BFX stem) (p=0.046); a complication was 2.85 times more likely to occur when using the BFX cup/stem prosthesis versus a hybrid prosthesis. In 95% of cases, owners described their satisfaction with the outcome of THR as 'very good' or 'good'. Conclusions:Complication rates from the BVOA-CHR are similar to previous studies. 'Surgeon' and 'clinic' are not variables in our analysis (contractual) but the data suggest that prosthesis type has a relationship with complication rate, with Biomedtrix BFX (circa 2012) having a high short-term complication rate.

AT dogs had increased mechanical asymmetry at 4 and 8 weeks compared to the CM group revealing surgery worsened limb function. There was no significant difference in mechanical symmetry between groups at 26 and 52 weeks.