Peer-reviewed veterinary case report
Does pre-surgery hip subluxation raise luxation risk after dog hip
By Hayes, Graham M et al.·Published in Veterinary surgery : VS·2011·Department of Veterinary Medicine, United Kingdom·View original on PubMed →
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Original publication title: Does the degree of preoperative subluxation or soft tissue tension affect the incidence of postoperative luxation in dogs after total hip replacement?
- Species:
- dog
Plain-English summary
A group of 100 dogs that underwent total hip replacement surgery were studied to see if pre-existing hip issues, like subluxation (a partial dislocation), could lead to problems after surgery. Out of these dogs, 13 experienced luxation (full dislocation) within 8 weeks post-surgery. The study found that certain measurements of hip stability before surgery were linked to a higher risk of this complication. This suggests that dogs with looser hips before surgery are more likely to face luxation afterward.
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Abstract
OBJECTIVE: To investigate whether preexisting coxofemoral subluxation/luxation predisposes to postoperative total hip replacement (THR) luxation. STUDY DESIGN: Case series. ANIMALS: Dogs (n=100) that had cemented THR (n=109); 23 normal controls. METHODS: A preliminary study was performed to validate our methods of assessing luxation and laxity by comparing dogs with severe hip dysplasia with a control population of normal dogs. For the main study, the records and radiographs of all dogs that had primary THR were reviewed. Measurements taken from preoperative radiographs to quantify hip subluxation/laxity included the Norberg angle, subluxation index, and 2 new measures: acetabular depth ratio (ADR) and dorsal acetabular rim ratio (DARR). Differences between groups that had luxation within 8 weeks and those that did not were investigated. RESULTS: Postoperative luxation occurred in 13 dogs (12%) within 8 weeks of surgery. Luxation was significantly associated with various measurements (including Norberg angle, ADR, DARR) thought to reflect degree of subluxation/soft tissue tension. CONCLUSION: Luxation after canine THR is a multifactorial problem but preexisting subluxation/soft tissue laxity is a significant risk factor for this complication.
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Search related cases →Original publication on PubMed: https://pubmed.ncbi.nlm.nih.gov/21070265/