Cross-sectional area and mean echogenicity of shoulder and elbow tendons in adult German Shepherd dogs

Summary

The aim of this study was to describe the cross-sectional area and mean echogenicity of the main tendons of the shoulder and elbow joints in adult German Shepherd dogs and to determine the effects of sex, weight, and age on these parameters. No previous publications in the veterinary literature have reported information regarding quantitative ultrasonographic tendon measurements in dogs.

Thirty German Shepherd dogs were examined: 13 males and 17 females. The cross-sectional area was significantly higher in males than in females (p <0.05) for the distal tendon of the triceps brachii muscle and the tendons of the flexor carpi ulnaris and common digital extensor muscles. The influence of sex on mean echogenicity was not significant. According to age, mean echogenicity was higher in older dogs, while the cross-sectional areas were similar in the two groups. Cross-sectional area and mean echogenicity of the tendons showed a direct increase with an increase in body weight. The data gained from this study can help support the clinician to discriminate between normal and pathological conditions.

Keywords

Cross-sectional area - mean echogenicity - tendon - shoulder - elbow - dog

• References

• 1 Kramer M, Gerwing M, Hach V. et al. Sonography of the musculoskeletal system in dogs and cats. Vet Radiol Ultrasoun 1997; 38: 139-149.
• 2 Bergenhuyzen AL, Vermote KA, van Bree H. et al. Long-term follow-up after arthroscopic tenotomy for partial rupture of the biceps brachii tendon. Vet Comp Orthop Traumatol 2010; 23: 51-55.
• 3 Long CD, Nyland TG. Ultrasonographic evaluation of the canine shoulder. Vet Radiol Ultrasoun 1999; 40: 372-379.
• 4 Gaitini D. Shoulder ultrasonography: Performance and common findings. J Clin Imaging Sci. 2012 2. 38.
• 5 Petranova T, Vlad V, Porta F. et al. Ultrasound of the shoulder. Med Ultrason 2012; 14: 133-140.
• 6 Radunovic G, Vlad V, Micu MC. et al. Ultrasound assessment of the elbow. Med Ultrason 2012; 14: 141-146.
• 7 Van Schie HTM, Bakker EM, Jonker AM. et al. Efficacy of computerized discrimination between structure-related and no-structure-related echoes in ultrasonographic images for the quantitative evaluation of the structural integrity of superficial digital flexor tendons in horses. Am J Vet Res 2001; 62: 1159-1166.
• 8 Spadari A, Spinella G, Romagnoli N. et al. Rupture of the lateral lobe of the biceps brachii tendon in an Arabian horse. Vet Comp Orthop Traumatol 2009; 22: 253-255.
• 9 Rivers B, Wallace L, Johnston GR. Biceps tenosynovitis in the dog: radiographic and sonographic findings. Vet Comp Orthop 1992; 5: 51-57.
• 10 Kramer M, Gerwing M. Sonography of the shoulder joint in dogs (and its surrounding soft tissues); Part A: Sonographical anatomy of the shoulder joint (and its soft issues). Kleintierpraxis 1994; 39: 71-80.
• 11 Spinella G, Valentini S, Tamburro R. et al. Examen échographique des structures musculaires du chien [Ultrasound examination of the muscular structures of the dog]. Point Vet 2007; 38: 31-34.
• 12 Seyrek-Intas D, Michele U, Tacke S. et al. Accuracy of ultrasonography in detecting fragmentation of the medial coronoid process in dogs. J Am Vet Med Assoc 2009; 234: 480-485.
• 13 Gillis C, Meagher DM, Locatelly L. et al. Ultrasonographic cross-sectional area and mean echogenicity of the superficial and deep digital flexor tendons in 50 trained Thoroughbred racehorses. Am J Vet Res 1995; 56: 1265-1269.
• 14 Agut A, Martinez ML, Sanchez-Valverde MA. et al. Ultrasonographic characteristics (cross-sectional area and relative echogenicity) of the digital flexor tendons and ligaments of the metacarpal region in Purebred Spanish horses. Vet J 2009; 180: 377-383.
• 15 Vilar JM, Santana A, Espinosa J. et al. Cross-sectional area of the tendons of the tarsal region in standardbred trotter horses. Equine Vet J 2011; 43: 235-239.
• 16 Barone R. Muscoli della cintura e dell’arto toracico. In: Barone R. editor. Anatomia Comparata dei Mammiferi Domestici Vol. 2 Artrologia e Miologia [Comparative Anatomy of Domestic Animals. Vol. 2. Arthrology and Myology]. Italian ed. Bologna: Edagricole; 1981. pg. 587-672.
• 17 Evans HE, de Lahunta A. The skeletal and muscular systems. In: Evans HE, de Lahunta A. editors. Guide to the Dissections of the Dog. St. Louis: Saunders Elsevier; 2010. pg. 15-38.
• 18 Gnudi G. L’arto toracico dei piccoli animali [The Thoracic Limb of Pets]. In: Brunetti A, Bertoni G, Pozzi L. editors. Radiologia Veterinaria [Veterinary Radiology]. Napoli: Idelson-Gnocchi; 2005. pg. 105-141.
• 19 Gnudi G, Martini FM, Bertoni G. Contributo dell’ultrasonografia alla diagnostica delle più frequenti patologie della spalla del cane [Contribution of ultrasonography in the diagnosis of the most frequent diseases of the shoulder in dogs]. Proceedings of the VIII Congresso Nazionale Società Italiana di Chirurgia Veterinaria [National Congress of the Italian Society of Veterinary Surgery]. 2001. June 20-23 Olbia NU, Italy: pg. 41-46.
• 20 Montgomery R, Fitch R. Muscle and Tendon Disorders. In: Slatter DH. editor. Textbook of Small Animal Surgery. Philadelphia: Saunders; 2003. pg. 2264-2272
• 21 Gillis C, Sharkey N, Stover S. Effect of maturation and ageing on material and ultrasonographic properties of equine superficial digital flexor tendon. Am J Vet Res 1995; 56: 1345-1350.
• 22 Gillis C, Pool R, Meagher DM. et al. Effect of maturation and ageing on the histomorphometric and biochemical characteristics of equine superficial digital flexor tendon. Am J Vet Res 1997; 58: 425-430.
• 23 Crevier-Denoix N, Ruel Y, Dardillat C. et al. Correlations between mean echogenicity and material properties of normal and diseased equine superficial digital flexor tendons: an in vitro segmental approach. J Biomech 2005; 38: 2212-2220.
• 24 Van Schie JTM, Bakker EM, van Weeren PR. Ultrasonographic evaluation of the equine tendons: a quantitative in vitro study of the effects of amplifier gain level, transducer-tilt, and transducer-displacement. Vet Radiol Ultrasoun 1999; 40: 151-160.
• 25 Van Schie HTM, Bakker EM, Jonker AM. et al. Ultrasonographic tissue characterization of equine superficial digital flexor tendons by means of grey level statistics. Am J Vet Res 2000; 61: 210-219.
• 26 Birch HL, Bailey JV, Bailey AJ. et al. Age-related changes to the molecular and cellular components of equine flexor tendons. Equine Vet J 1999; 31: 391-396.
• 27 Trangerud C, Grondalen J, Indrebo A. et al. A longitudinal study on growth variables in dogs of four large breeds raised in domestic environments. J Anim Sci 2007; 85: 76-83.