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Vet Comp Orthop Traumatol 1991; 4(03): 77-85
DOI: 10.1055/s-0038-1633258
Clinical Report
Schattauer GmbH

The Adjunctive Use of Half-Pin (Type I) External Skeletal Fixators in Combination with Intramedullary Pins for Femoral Fracture Fixation

Melissa A. Foland
1   From the Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, USA
,
P. D. Schwarz
1   From the Department of Clinical Sciences, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, USA
,
M. D. Salman
2   From the Department of Environmental Health, College of Veterinary Medicine and Biomedical Sciences, Colorado State University, Fort Collins, USA
› Author Affiliations
Further Information

Publication History

Received for publication 16 November 1990

Publication Date:
06 February 2018 (online)

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Summary

A half-pin (type I) external skeletal fixator was used in conjunction with an intramedullary pin(s) for management of 29 femur fractures in 15 dogs and 14 cats. Eighty percent of the dogs and 100% of the cats achieved bony union using this combination of implants. However, because of the development of major complications which permanently impaired limb function (e.g. quadriceps tie-down), only 67% of the dogs and 93% of the cats were considered to have successful outcomes. The overall complication rate was 87% for dogs and 43% for cats. Dogs weighing <6.8 kg had a significantly lower complication rate than dogs weighing ≥6.8 kg. Dogs < one year of age were significantly more likely to develop a major complication resulting in an unsuccessful outcome, than dogs ≥ one year of age. A significant association was not established between any of the study variables and the complication incidence in cats.

Keywords

Fracture - intramedullary pin - external skeletal fixator
 

  • References

  • 1 Aron DN, Toombs JP. Updated principles of external skeletal fixation. Compend Contin Educ 1984; 6: 845-58..
    PubMedGoogle Scholar
  • 2 Renegar WR, Leeds EB, Olds RB. The use of the Kirschner-Ehmer splint in clinical orthopedics. Part I: long bone and mandibular fractures. Compend Contin Educ 1982; 4: 381-91..
    PubMedGoogle Scholar
  • 3 Egger EL, Greenwood KM. In: Slatter DH. (ed). External Skeletal Fixation. Textbook of Small Animal Surgery. Philadelphia: WB Saunders Co.; 1985: 1972-88.
    Google Scholar
  • 4 Bradley RL, Rouse GP. External skeletal fixation using the through-and-through Kirschner-Ehmer splint. J Am Anim Hosp Assoc 1980; 16: 523-30..
    PubMedGoogle Scholar
  • 5 Brinker WO, Flo GL. Principles of application of external skeletal fixation. Vet Clin N Am 1975; 2: 197-208..
    PubMedGoogle Scholar
  • 6 Nunamaker DM. Treatment of open fractures in small animals. Compend Contin Educ 1979; 1: 66-76..
    PubMedGoogle Scholar
  • 7 Brinker WO, Piermattei DL, Flo GL. In: Handbook of Small Animal Orthopedics and Fracture Treatment. Philadelphia: WB Saunders Co.; 1983
    Google Scholar
  • 8 Toombs JP, Aron DN, Basinger RR, Ewing P. Angled connecting bars for transarticular application of Kirschner-Ehmer external skeletal fixation splints. J Am Anim Hosp Assoc 1989; 25: 213-6..
    PubMedGoogle Scholar
  • 9 Binnington AG. Delayed Union and Non Union. In: Slatter DH. (ed). Textbook of Small Animal Surgery. Philadelphia: WB Saunders Co.; 1985: 2014-20.
    Google Scholar
  • 10 Vasseur PB, Paul HA, Crumley L. Evaluation of fixation devices for prevention of rotation in transverse fractures of the canine femoral shaft: An in vitro study. Am J Vet Res 1984; 45: 1505-7..
    PubMedGoogle Scholar
  • 11 Egger EL. Static strength evaluation of six external skeletal fixation configurations. Vet Surg 1983; 3: 130-6..
    PubMedGoogle Scholar
  • 12 Brinker WO, Verstraete MC, Soutas-Little RM. Stiffness studies on various configurations and types of external fixators. J Am Anim Hosp Assoc 1985; 21: 801-8..
    PubMedGoogle Scholar
  • 13 Briggs BT, Chao EYS. The mechanical performance of the standard Hoffman-Vidal apparatus. J Bone Jt Surg 1982; 64A: 566-73..
    PubMedGoogle Scholar
  • 14 Chao EYS, Briggs BT, McCoy MT. Theoretical and experimental analysis of Hoffman-Vidal external fixation system. In: Brookey AF, Edwards CC. (eds). External fixation: the current state of the art. Baltimore: Williams and Wilkins; 1979: 345-70.
    Google Scholar
  • 15 Egger EL, Runyon CL, Rigg DL. Use of the type I double connecting bar configuration of external skeletal fixation on long bone fractures in dogs: a review of 10 cases. J Am Anim Hosp Assoc 1986; 22: 57-64..
    PubMedGoogle Scholar
  • 16 Bloomberg M. Muscles and Tendons. In: Slatter DH. (ed). Textbook of Small Animal Surgery. Philadelphia: WB Saunders Co.; 1985: 2331-58.
    Google Scholar
  • 17 Leighton RL. Muscle contractures in the limbs of dogs and cats. Vet Surg 1981; 3: 132.
    PubMedGoogle Scholar
  • 18 Bardet JF, Hohn RB. Quadriceps contracture in dogs. JAVMA 1983; 183: 680-5..
    PubMedGoogle Scholar
  • 19 Leighton RL. Quadriceps contracture (ischemic contracture of the quadriceps). In: Bojrab MJ. (ed). Pathophysiology in small animal surgery. Philadelphia: Lea & Febiger; 1981: 827-30.
    Google Scholar
  • 20 Egger EL, Histand MB, Blass CE, Powers BE. Effect of fixation pin insertion on the bone-pin interface. Vet Surg 1986; 15: 246-52..
    CrossrefPubMedGoogle Scholar
  • 21 Bennett RA, Egger EL, Histand MB, Ellis AB. Comparison of the strength and holding power of 4 pin designs for use with half-pin (type I) external skeletal fixation. Vet Surg 1987; 16: 207-11..
    CrossrefPubMedGoogle Scholar
  • 22 Aron DN, Toombs JP. Primary treatment of severe fractures by external skeletal fixation: threaded pins compared with smooth pins. J Am Anim Hosp Assoc 1986; 22: 659-70..
    PubMedGoogle Scholar
  • 23 DeCamp CE, Brinker WO, Soutas-Little RM. Porous titanium surfaced pins for external skeletal fixation. J Am Anim Hosp Assoc 1988; 24: 295-300..
    PubMedGoogle Scholar
  • 24 Egkher E, Martinek H, Wielke B. How to increase the stability of external fixation units. Arch Arthop Trauma Surg 1980; 96: 35-43..
    PubMedGoogle Scholar
  • 25 Behrens I, Johnson WD, Koch TW, Kovacevic N. Bending stiffness of unilateral and bilateral fixator frames. Clin Orth Rel Res 1983; 178: 103-10..
    PubMedGoogle Scholar
  • 26 Wu JJ, Shyr HS, Chao EYS, Kelly PJ. Comparison of osteotomy healing under external skeletal fixation devices with different stiffness characteristics. J Bone Jt Surg 1984; 66A: 1258-64..
    PubMedGoogle Scholar
  • 27 Braden TD, Brinker WO. Effect of certain internal fixation devices on functional limb usage in dogs. JAAHA 1973; 162: 642-6..
    PubMedGoogle Scholar
  • 28 Johnson AL, Kneller SK, Weigel RM. Radial and tibial fracture repair with external skeletal fixation. Effects of fracture type, reduction and complications on healing. Vet Surg 1989; 18: 367-72..
    CrossrefPubMedGoogle Scholar
  • 29 Egger et al. Effects of destabilizing rigid external fixation on healing of unstable canine osteotomies. Trans 34th Orthop Res Soc. 1988: 302.
    PubMedGoogle Scholar
  • 30 Braden TD, Brinker WO, Little RW, Jenkins RB, Butler D. Comparative biomechanical evaluation of bone healing in the dog. JAAHA 1973; 163: 65-9..
    PubMedGoogle Scholar