Retrospective Analysis of Suspensory Ligament Branch Injuries in 70 Dressage Horses.
Abstract: There are no studies that have investigated factors influencing the outcome of dressage horses with suspensory ligament (SL) branch injuries. The aim was to determine if age, breed, work level, injury severity, anatomical localisation of injury, number of injured branches, periligamentous fibrosis, persistence of power Doppler signal or coexistent osteoarthritis of a metacarpophalangeal (MCP) or metatarsophalangeal (MTP) joint influenced the prognosis of 70 dressage horses. Outcome was defined as good (return to pre-injury level of work or higher), poor (return to a lower level of work) or retirement. Chi-squared or Fisher's exact test and the Kruskal-Wallis test were used to identify relationships between variables of interest and follow-up outcome. Follow-up outcome was good in 44/70 horses (62.9%), poor in 13/70 (18.6.%) and 13/70 horses (19.1%) were retired due to no response to treatment. Ultrasonographic lesion grade ( = 0.07), cross-sectional area (CSA) of the SL ( = 0.96), CSA of the lesion ( = 0.28) and the lesion CSA as a percentage of the SL CSA ( = 0.40) were not associated with outcome. Power Doppler signal was present in 75.8% of injured branches at the initial examination. The severity of power Doppler signal was not associated with outcome ( = 0.20); however, persistence of power Doppler signal was negatively associated with outcome ( < 0.001). Other variables did not influence the follow-up outcome. Early recognition of SL branch injury is likely to result in a more favourable outcome with appropriate treatment and management.
Publication Date: 2025-10-23 PubMed ID: 41227410PubMed Central: PMC12607962DOI: 10.3390/ani15213079Google Scholar: Lookup
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Summary
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Retrospective analysis examined factors affecting the recovery of 70 dressage horses with suspensory ligament (SL) branch injuries to determine which variables influenced their return to work or retirement.
Study Objective and Background
- The study aimed to identify variables influencing prognosis in dressage horses suffering from suspensory ligament branch injuries.
- No prior research had investigated the outcome determinants in this specific group of horses.
- Factors considered included demographic details, injury characteristics, and diagnostic imaging findings.
Methods
- Retrospective data from 70 dressage horses diagnosed with SL branch injuries were analyzed.
- Variables studied included:
- Age and breed of the horse
- Level of work prior to injury
- Severity and anatomical location of the injury
- Number of injured branches
- Presence of periligamentous fibrosis (scar tissue around the ligament)
- Persistence and severity of power Doppler ultrasound signals indicating blood flow in injured areas
- Presence of osteoarthritis in the related metacarpophalangeal (MCP) or metatarsophalangeal (MTP) joints
- Outcomes were classified as:
- Good: return to pre-injury or higher work level
- Poor: return to lower work level
- Retirement: unable to return to work
- Statistical tests used were Chi-squared, Fisher’s exact test, and Kruskal-Wallis test to assess relationships between variables and outcome.
Key Results
- Outcome distribution:
- 62.9% (44 horses) had a good outcome
- 18.6% (13 horses) had a poor outcome
- 19.1% (13 horses) were retired due to non-response to treatment
- Ultrasonographic measures:
- Lesion grade, the cross-sectional area (CSA) of the ligament, and lesion CSA (absolute or as a percentage of ligament CSA) had no statistically significant association with outcome (p-values: 0.07 to 0.96).
- Power Doppler ultrasound findings:
- 75.8% of injured branches showed power Doppler signal at the initial exam, indicating blood flow in the lesions.
- The initial severity of power Doppler signal was not linked to prognosis (p = 0.20).
- However, persistence of power Doppler signal during follow-up was strongly associated with poorer outcomes (p < 0.001), meaning ongoing blood flow signals indicated worse healing and prognosis.
- Other variables such as age, breed, work level, periligamentous fibrosis, number of branches injured, anatomical location, and presence of osteoarthritis did not significantly influence outcome.
Conclusions
- Early detection and diagnosis of SL branch injuries in dressage horses are crucial for improving the chance of returning to prior or better work levels.
- Persistence of blood flow signal on power Doppler during follow-up serves as a negative prognostic indicator, suggesting incomplete healing or ongoing injury activity.
- Traditional measures of lesion size and severity are less predictive of outcome, emphasizing the importance of advanced imaging monitoring.
- Management and treatment strategies should focus on early identification and closely monitoring vascular signals to optimize recovery.
Clinical Implications
- Veterinarians should include power Doppler evaluation in assessing suspensory ligament branch injuries to better predict prognosis.
- Follow-up exams monitoring persistence of vascular signals can guide treatment adjustments.
- Relying solely on lesion size or anatomical location may be insufficient for prognostication.
- Dressage horse trainers and owners benefit from early veterinary assessment when lameness appears to enhance outcomes.
Cite This Article
APA
Boado A, Pollard D, Dyson S.
(2025).
Retrospective Analysis of Suspensory Ligament Branch Injuries in 70 Dressage Horses.
Animals (Basel), 15(21), 3079.
https://doi.org/10.3390/ani15213079 Publication
Researcher Affiliations
- Independent Researcher, Avenida Salmoral 4, Manzanares el Real, 28492 Madrid, Spain.
- Medicine and Surgery Department, Universidad Complutense de Madrid, Av. Complutense, Moncloa-Aravaca, 28040 Madrid, Spain.
- Independent Researcher, Rodham Road, Christchurch, Wisbech PE14 9NU, Cambridgeshire, UK.
- Independent Researcher, Church Road, Market Weston, Diss IP22 2NX, Suffolk, UK.
Conflict of Interest Statement
The authors declare no conflicts of interest.
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