Treatment of fractures and other orthopedic problems in cats and dogs using versatile external fixator




Clamps, Bone fractures, Linear fixators, Osteosynthesis, Fixator pins


Many complicated bone fractures can be healed by different techniques including linear external fixation. New generation linear external fixators enhanced the scope of application for bone fractures by mechanical progress. Difficulties include implementing enough pins through fixation clamps to the comminuted fragments or clamp addition and fixing it properly to the rod with the correct pin insertion angle. Effective configurations may not always result. This study sought to reveal the clinical efficiency of modified clamps of a versatile external fixator (VEF) to fix different types of fractures and orthopedic problems according to the radiographic and clinical results. We used this fixator on 17 cats and 17 dogs of different ages and sizes, having different types of antebrachium, humerus, tibia, ulna fractures, and bone-muscle deformities. Clamps had different features to connect fixator pins. Many fixator configurations were created according to the fracture type and body weight of the animals. The most used ones were unilateral and bilateral configurations. The callus formation and visual gait analysis were observed after the operations, until the removal of the fixator. After fixator removal, the visual gait status of the limbs was excellent in 67% of the cases, good in 15%, fair in 12%, and poor in 6%. We found that rods and fixator pins were connected easily by semi-locked clamps. Also, the double pin holding clamps saved space on the fixation rod by the application of two pins through one clamp. We think that clamps of versatile external fixators can easily be constructed to limb fractures and save time during surgery. 


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Aronsohn MG, Burk R. Unilateral uniplanar external skeletal fixation for isolated diaphyseal tibial fractures in skeletally immature dogs. Vet Surg. 2009;38(5):654-8. PMid:19573070.

Auger J, Dupuis J, Boudreault F, Pare P, Beauregard G, Breton L. Comparison of multistage versus one-stage destabilization of a type II external fixator used to stabilize an oblique tibial osteotomy in dogs. Vet Surg. 2002;31(1):10-22. PMid:11778163.

Beck JA, Simpson DJ. Type 1-2 hybrid external fixator with tied-in intramedullary pin for treating comminuted distal humeral fractures in a dog and a cat. Aust Vet J. 1999;77(1):18-20. PMid:10028386.

Beever L, Giles K, Meeson R. Postoperative complications associated with external skeletal fixators in cats. J Feline Med Surg. 2017;19(7):727-36. PMid:28592224.

Beever LJ, Giles K, Meeson RL. Postoperative complications associated with external skeletal fixators in dogs. Vet Comp Orthop Traumatol. 2018;31(2):137-43. PMid:29534282.

Canapp SO Jr. External fracture fixation. Clin Tech Small Anim Pract. 2004;19(3):114-9. PMid:15712457.

Clarke SP, Carmichael S. Treatment of distal diaphyseal fractures using hybrid external skeletal fixation in three dogs. J Small Anim Pract. 2006;47(2):98-103. PMid:16438698.

Corr SA. Practical guide to linear external skeletal fixation in small animals. In Pract. 2005;27(2):76-85.

Fox SM, Bray JC, Guerin SR, Burbridge HM. Antebrachial deformities in the dog: treatment with external fixation. J Small Anim Pract. 1995;36(7):315-20. PMid:7474962.

Foxworthy M, Pringle RM. Dynamization timing and its effect on bone healing when using the orthofix dynamic axial fixator. Injury. 1995;26(2):117-9. PMid:7721463.

Fragomen AT, Rozbruch SR. The mechanics of external fixation. HSS J. 2007;3(1):13-29. PMid:18751766.

Gemmill TJ, Cave TA, Clements DN, Clarke SP, Bennett D, Carmichael S. Treatment of canine and feline diaphyseal radial and tibial fractures with low-stiffness external skeletal fixation. J Small Anim Pract. 2004;45(2):85-91. PMid:14984151.

Gilley RS, Beason DP, Snyder DM, Boston RC, Radin A, Kapatkin AS, Smith GK, Soslowsky LJ. External fixator clamp reuse degrades clamp mechanical performance. Vet Surg. 2009;38(4):530-6. PMid:19538676.

Giotakis N, Narayan B. Stability with unilateral external fixation in the tibia. Strategies Trauma Limb Reconstr. 2007;2(1):13-20. PMid:18427910.

Guerin SR, Lewis DD, Lanz OI, Stalling JT. Comminuted supracondylar humeral fractures repaired with a modified type I external skeletal fixator construct. J Small Anim Pract. 1998;39(11):525-32. PMid:9846315.

Johnson AL. Fundamentals of orthopedic surgery and fracture management. In: Fossum TW, editor. Small animal surgery. 5th ed. Missouri: Elsevier; 2018.

Könning T, Maarschalkerweerd RJ, Endenburg N, Theyse LFH. A comparison between fixation methods of femoral diaphyseal fractures in cats – a retrospective study. J Small Anim Pract. 2013;54(5):248-52. PMid:23560936.

Kraus KK, Toombs JP, Ness MG. External fixation in small animal fixation. USA: Blackwell Science Ltd.; 2003. p. 5-59.

Langley-Hobbs SJ, Carmichael S, McCartney WT. External skeletal fixation for stabilisation of comminuted humeral fractures in cats. J Small Anim Pract. 1997;38(7):280-5. PMid:9239628.

Lewis DD, Cross AR, Carmichael S, Anderson MA. Recent advances in external skeletal fixation. J Small Anim Pract. 2001;42(3):103-12. PMid:11303852.

Marcellin-Little DJ. External skeletal fixation. In: Slatter D, editor. Text book of small animal surgery. 3rd ed. Missouri: Saunders; 2003. p. 1818-34.

Mora G, Forriol F. Mechanical analysis of the healing of different osteotomies fixed externally. Int Orthop. 2000;24(5):295-8. PMid:11153463.

Palmer RH. External fixators and minimally invasive osteosynthesis in small animal veterinary medicine. Vet Clin N Am-Small. 2012;42(5):913-34.

Petfield JL, Hayeck GT, Kopperdahl DL, Nesti LJ, Keaveny TM, Hsu JR. Virtual stress testing of fracture stability in soldiers with severely comminuted tibial fractures. J Orthop Res. 2017;35(4):805-11. PMid:27302535.

Piermattei DL, Flo GL, DeCamp CE. Handbook of small animal orthopedics and fracture repair. 5th ed. Missouri: Saunders Elsevier; 2016. p. 41-99.

Roe S. Comparative evaluation of in vitro mechanical properties of different designs of epoxy-pin external skeletal fixation systems. Vet Surg. 2014;43(7):897-8. PMid:25145679.

Rovesti GL. Complications in external skeletal fixation. In: Griffon D, Hamaide A, editors. Complications in small animal surgery. Iowa: John Wiley & Sons; 2016. p. 110-7.

Seibert RL, Lewis DD, Coomer AR, Sereda CW, Royals SR, Leasure CS. Stabilisation of metacarpal or metatarsal fractures in three dogs, using circular external skeletal fixation. N Z Vet J. 2011;59(2):96-103. PMid:21409737.

Shahar R. Relative stiffness and stress of type I and type II external fixators: acrylic versus stainless-steel connecting bars a theoretical approach. Vet Surg. 2000;29(1):59-69. PMid:10653496.

Sylvestre AM. Fracture management for the small animal practitioner. 5th ed. Hoboken, USA: John Wiley & Sons; 2019. p. 235-243.

Wander K. External fixators. In: Sylvestre AM, editor Fracture management for the small animal practitioner. Iowa: John Wiley & Sons; 2019. p. 235-243.

White DT, Bronson DG, Welch RD. A mechanical comparison of veterinary linear external fixation systems. Vet Surg. 2003;32(6):507-14. PMid:14648528.

Witte PG, Bush MA, Scott HW. Management of feline distal tibial fractures using a hybrid external skeletal fixator. J Small Anim Pract. 2014;55(11):571-8. PMid:25297567.




How to Cite

Öztürk, Y., & Özsoy, . S. . (2021). Treatment of fractures and other orthopedic problems in cats and dogs using versatile external fixator. Brazilian Journal of Veterinary Research and Animal Science, 58, e182908.