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Objectives:
Delayed union, non-union and mal-union are disorders of fracture healing that cause significant morbidity. There are no contemporary estimates of their prevalence in cats, nor analyses of predisposing factors. We aimed to estimate the prevalence of feline delayed-, non- and mal-union, and to examine possible predisposing factors.
Methods:
Clinical records and radiographs from three animal hospitals were reviewed. Characteristics of fractures defined as “union”, “delayed union”, “non-union” and “mal-union”, were described, and differences in proportions and medians were tested using χ2 and Mann-Whitney U-tests respectively.
Results:
Union occurred in 80% of fractures, delayed union in 10%, non-union in 4% and mal-union in 6%. Forty percent of non-unions affected the radius and ulna, versus 9% of unions, (p<0.05). Twenty-eight percent of non- and delayed unions (combined) were open fractures, versus 5% of unions (p<0.05). Twenty-eight percent of non- and delayed unions (combined) were in cats with multiple fractures, versus 5% of unions (p<0.05). The median age of cat in non- and delayed unions (combined) was 5 years, versus 2 years for union (p<0.05). Twenty-eight percent of non- and delayed unions (combined) suffered implant failure, versus 2% of unions (p<0.05). Seventeen percent of non- and delayed unions (combined) suffered infection, versus 1% of unions (p<0.05).
Conclusions:
Non- and delayed union were more prevalent in the radius and ulna, in open fractures, where cats had multiple fractures, in older cats, and following implant failure or infection. We now aim to analyse a larger number of cases and confirm risk factors for feline bone healing disorders.
34th Annual Scientific Meeting proceedings
Stream:
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Session: Orthopaedic Short Communications
Date/Time: 06-07-2024 (16:30 - 16:45) | Location: Auditorium 1
Date/Time: 06-07-2024 (16:30 - 16:45) | Location: Auditorium 1
Delayed union, non-union and mal-union in 126 feline fractures
Bobis Villagra D1, Chan Y1, Benet Moya P1, Fracka A2, Filliquist B*3, Marshall WG*1
1Vets Now Emergency and Referral Hospital, Glasgow, United Kingdom, 2Department of Small Animal Clinical Sciences, College of Veterinary Medicine, Michigan State University, East Lansing, Michigan, USA, 3Department of Surgical and Radiological Sciences, School of Veterinary Medicine, University of California Davis, Davis, California, USA.
Objectives:
Delayed union, non-union and mal-union are disorders of fracture healing that cause significant morbidity. There are no contemporary estimates of their prevalence in cats, nor analyses of predisposing factors. We aimed to estimate the prevalence of feline delayed-, non- and mal-union, and to examine possible predisposing factors.
Methods:
Clinical records and radiographs from three animal hospitals were reviewed. Characteristics of fractures defined as “union”, “delayed union”, “non-union” and “mal-union”, were described, and differences in proportions and medians were tested using χ2 and Mann-Whitney U-tests respectively.
Results:
Union occurred in 80% of fractures, delayed union in 10%, non-union in 4% and mal-union in 6%. Forty percent of non-unions affected the radius and ulna, versus 9% of unions, (p<0.05). Twenty-eight percent of non- and delayed unions (combined) were open fractures, versus 5% of unions (p<0.05). Twenty-eight percent of non- and delayed unions (combined) were in cats with multiple fractures, versus 5% of unions (p<0.05). The median age of cat in non- and delayed unions (combined) was 5 years, versus 2 years for union (p<0.05). Twenty-eight percent of non- and delayed unions (combined) suffered implant failure, versus 2% of unions (p<0.05). Seventeen percent of non- and delayed unions (combined) suffered infection, versus 1% of unions (p<0.05).
Conclusions:
Non- and delayed union were more prevalent in the radius and ulna, in open fractures, where cats had multiple fractures, in older cats, and following implant failure or infection. We now aim to analyse a larger number of cases and confirm risk factors for feline bone healing disorders.
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