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Vet Comp Orthop Traumatol 2014; 27(02): 130-134
DOI: 10.3415/VCOT-13-05-0064
Original Research
Schattauer GmbH

Lateral patellar luxation in dogs: a retrospective study of 65 dogs

S. Kalff
1   Willows Veterinary Referral Service, Solihull, United Kingdom
,
S. J. Butterworth
2   Weighbridge Referral Centre, Swansea, United Kingdom
,
A. Miller
3   Andrew Miller and Associates, Stirling, United Kingdom
,
B. Keeley
4   Northwest Surgeons, Cheshire, United Kingdom
,
S. Baines
1   Willows Veterinary Referral Service, Solihull, United Kingdom
,
W. M. McKee
1   Willows Veterinary Referral Service, Solihull, United Kingdom
› Author Affiliations
Further Information

Publication History

Received: 18 May 2013

Accepted: 20 January 2013

Publication Date:
20 December 2017 (online)

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Summary

Objective

To report the signalment and clinical features of dogs with non-traumatic lateral patellar luxation and to report the complications and outcomes following surgery.

Methods

A multicentre retrospective study was performed. Medical records were reviewed and the signalment, clinical features, and treatment of dogs presenting with lateral patellar luxation were recorded. In dogs treated surgically, the outcome and complications were investigated.

Results

Sixty-five dogs (95 stifles) were included; 39 were male and median age at presentation was 10 months. Breeds were classified as small (n = 6), medium (n = 23), large (n = 27), and giant (n = 9). Lateral patellar luxation was classified as grade I (n = 14), II (n = 41), III (n = 29), and IV (n = 11). Conformational abnormalities were noted in 34 stifles; genu valgum was the most common (n = 28). Higher-grade luxation was associated with a younger age at presentation (p = 0.032) and genu valgum (p = 0.01). Surgery was performed on 58 stifles, 22 of which sustained one or more complications; 16 complications were managed conservatively, four with implant removal and six with revision surgery. Surgeon-assessed outcome was good or excellent in 47 of the 51 dogs available for review.

Conclusions

Non-traumatic lateral patellar luxation is a disease of predominantly medium and large breed dogs. It has several similar clinical features and can be surgically treated in a similar manner to medial patellar luxation with similar types of complications and outcomes expected.

Keywords

Patellar - luxation - dog - lateral

 

  • References

  • 1 Johnson JA, Austin C, Breur GJ. Incidence of canine appendicular musculoskeletal disorders in 16 veterinary teaching hospitals from 1980 through 1989. Vet Comp Orthop Traumatol 1994; 7: 56-69.
    Article in Thieme ConnectPubMedGoogle Scholar
  • 2 Ness MG, Abercromby RH, May C. et al. A survey of orthopaedic conditions in small animal veterinary practice in Britain. Vet Comp Orthop Traumatol 1996; 9: 43-52.
    Article in Thieme ConnectPubMedGoogle Scholar
  • 3 Ruble RP, Hird DW. Congenital abnormalities in immature dogs from a pet store: 253 cases (1987-1988). J Am Vet Med Assoc 1993; 202: 633-636.
    PubMedGoogle Scholar
  • 4 Hayes AG, Boudrieau RJ, Hungerford LL. Frequency and distribution of medial and lateral patellar luxation in dogs: 124 cases (1982-1992). J Am Vet Med Assoc 1994; 205: 716-720.
    PubMedGoogle Scholar
  • 5 LaFond E, Breur GJ, Austin CC. Breed susceptibility for developmental orthopedic diseases in dogs. J Am Anim Hosp Assoc 2002; 38: 467-477.
    CrossrefPubMedGoogle Scholar
  • 6 Alam MR, Lee JI, Kang HS. et al. Frequency and distribution of patellar luxation in dogs. 134 cases (2000 to 2005). Vet Comp Orthop Traumatol 2007; 20: 59-64.
    PubMedGoogle Scholar
  • 7 Bound N, Zakai D, Butterworth SJ. et al. The prevalence of canine patellar luxation in three centres. Clinical features and radiographic evidence of limb deviation. Vet Comp Orthop Traumatol 2009; 22: 32-37.
    PubMedGoogle Scholar
  • 8 Gibbons SE, Macias C, Tonzing MA. et al. Patellar luxation in 70 large breed dogs. J Small Anim Pract 2006; 47: 3-9.
    CrossrefPubMedGoogle Scholar
  • 9 Bojrab MJ. Pathophysiology in Small Animal Surgery. Philadelphia: Lea & Febiger; 1981. p. 1981-638.
    Google Scholar
  • 10 Piermattei DL, Flo GL, DeCamp CE. et al. Brinker, Piermattei and Flo's Handbook of Small Animal Orthopedics and Fracture Repair. Edinburgh: Elsevier Saunders; 2006. p. 2006-562.
  • 11 Towle HA, Griffon DJ, Thomas MW. et al. Pre- and postoperative radiographic and computed tomographic evaluation of dogs with medial patellar luxation. Vet Surg 2005; 34: 265-272.
    CrossrefPubMedGoogle Scholar
  • 12 Hulse DA. Pathophysiology and management of medial patellar luxation in the dog. Vet Med Small Anim Clin 1981; 76: 43-51.
    PubMedGoogle Scholar
  • 13 Arthurs GI, Langley-Hobbs SJ. Complications associated with corrective surgery for patellar luxation in 109 dogs. Vet Surg 2006; 35: 559-566.
    CrossrefPubMedGoogle Scholar
  • 14 Mostafa AA, Griffon DJ, Thomas MW. et al. Proximodistal alignment of the canine patella: radiographic evaluation and association with medial and lateral patellar luxation. Vet Surg 2008; 37: 201-211.
    CrossrefPubMedGoogle Scholar
  • 15 Witte PG, Scott HW. Treatment of lateral patellar luxation in a dog by femoral opening wedge osteotomy using an interlocking nail. Vet Rec. 2011 168. 243.
    PubMedGoogle Scholar
  • 16 The Kennel Club. Breed Information Centre [page on website]. The Kennel Club. 2014 [cited on 2013 January 1]. Available from: http://www.the-kennel-club.org.uk/services/public/breed/Default.aspx
    PubMedGoogle Scholar
  • 17 Roush JK. Canine patellar luxation. Vet Clin North Am Small Anim Pract 1993; 23: 855-868.
    CrossrefPubMedGoogle Scholar
  • 18 Piermattei DL, Johnson KA. An Atlas of Surgical Approaches to the Bones and Joints of Dogs and Cats. Philadelphia, Pa: Saunders; 2004
    Google Scholar
  • 19 The Kennel Club. Media Centre [page on website]. The Kennel Club. 2014 [cited on 2013 January 1]. Available from: http://www.thekennelclub.org.uk/our-resources/media-centre/
    PubMedGoogle Scholar
  • 20 Roch SP, Gemmill TJ. Treatment of medial patellar luxation by femoral closing wedge ostectomy using a distal femoral plate in four dogs. J Small Anim Pract 2008; 49: 152-158.
    CrossrefPubMedGoogle Scholar
  • 21 Swiderski JK, Palmer RH. Long-term outcome of distal femoral osteotomy for treatment of combined distal femoral varus and medial patellar luxation: 12 cases (1999-2004). J Am Vet Med Assoc 2007; 231: 1070-1075.
    CrossrefPubMedGoogle Scholar
  • 22 Dudley RM, Kowaleski MP, Drost WT. et al. Radiographic and computed tomographic determination of femoral varus and torsion in the dog. Vet Radiol Ultrasound 2006; 47: 546-552.
    CrossrefPubMedGoogle Scholar
  • 23 Palmer RH, Ikuta CL, Cadmus JM. Comparison of femoral angulation measurement between radiographs and anatomic specimens across a broad range of varus conformations. Vet Surg 2011; 40: 1023-1028.
    PubMedGoogle Scholar
  • 24 Insall J, Goldberg V, Salvati E. Recurrent dislocation and the high-riding patella. Clin Orthop Relat Res 1972; 88: 67-69.
    CrossrefPubMedGoogle Scholar
  • 25 Johnson AL, Broaddus KD, Hauptman JG. et al. Vertical patellar position in large-breed dogs with clinically normal stifles and large-breed dogs with medial patellar luxation. Vet Surg 2006; 35: 78-81.
    CrossrefPubMedGoogle Scholar
  • 26 Bardet JF, Piermattei DL. Long digital extensor and popliteal tendon avulsion associated with patellar luxation in a dog. J Am Vet Med Assoc 1983; 183: 465-466.
    PubMedGoogle Scholar
  • 27 Willauer CC, Vasseur PB. Clinical results of surgical correction of medial luxation of the patella in dogs. Vet Surg 1987; 16: 31-36.
    CrossrefPubMedGoogle Scholar
  • 28 Linney WR, Hammer DL, Shott S. Surgical treatment of medial patellar luxation without femoral trochlear groove deepening procedures in dogs: 91 cases (1998-2009). J Am Vet Med Assoc 2011; 238: 1168-1172.
    CrossrefPubMedGoogle Scholar
  • 29 Swiderski JK, Radecki SV, Park RD. et al. Comparison of radiographic and anatomic femoral varus angle measurements in normal dogs. Vet Surg 2008; 37: 43-48.
    CrossrefPubMedGoogle Scholar
  • 30 Beaconsfield T, Pintore E, Maffulli N. et al. Radiological measurements in patellofemoral disorders. A review. Clin Orthop Relat Res 1994; 18-28.
    PubMedGoogle Scholar
  • 31 Slocum B, Devine T. Trochlear recession for correction of luxating patella in the dog. J Am Vet Med Assoc 1985; 186: 365-369.
    PubMedGoogle Scholar