Electromyographic, Ultrasonographic, and Morphologic Studies to Evaluate the Transposition Technique of the Semitendinosus Muscle in Dogs
World Small Animal Veterinary Association World Congress Proceedings, 2005
A.C. Mortari; S.C. Rahal; L.A.L. Resende2; M. Dal-Pai Silva3; M.J. Mamprim1; M A. Corrêa; S.H.S. Antunes
1Department of Veterinary Surgery and Anesthesiology and Department of Animal Reproduction and Radiology, 2Faculty of Veterinary Medicine and Animal Science, UNESP Botucatu, São Paulo, Brazil; 3Department of Psychiatry and Neurology, Faculty of Medicine, UNESP Botucatu, Brazil;Department of Morphology, Bioscience Institute, UNESP Botucatu, Brazil

When surgical procedure to treat perineal hernia fails it is necessary to use salvage procedures for pelvic diaphragm reconstruction. The transposition technique of the semitendinosus muscle is one of the recommended methods. This study was undertaken to evaluate the transposition technique of the semitendinosus muscle for its utilization in the repair of pelvic diaphragm using electromyographic, ultrasonographic, and morphologic studies.

Ten male adults crossbreed dogs, from 3 to 4 years old were used. The left semitendinosus muscle was cut close to the popliteus lymph node, rotated and sutured at the perineal region. The contralateral muscle was considered as control. The motor nerve conduction study of both sciatic-tibial nerves, and electromyographic and ultrasonographic exams of both semitendinosus muscles were performed before the surgical procedure and at 15, 30, 60 and 90 days postoperatively. Samples of the semitendinosus muscles were collected for morphological analysis 90th days after surgery.

The left semitendinosus muscle presented an accentuated degree of longitudinal shortening after transection (an average of 2.51 cm). In general, the transposed muscle acquired a heterogeneous pattern characterised by irregular distribution of the echoes with hyperechoic and hypoechoic areas. There was no difference in motor nerve conduction velocity, latency and amplitude of the sciatic-tibial nerves between members and among evaluation moments. In all animals activity at rest was normal and action potentials at slight effort were present on day 90 after surgery. The sections of the transposed semitendinosus muscle showed normal pattern areas and several degrees of abnormal areas by morphologic analysis.

It was possible to conclude that according to the electromyographic studies, the transposed muscle was able to contract, but showed some degree of atrophy detected by ultrasonographic and morphologic analyses.

Speaker Information
(click the speaker's name to view other papers and abstracts submitted by this speaker)

S.C. Rahal

MAIN : Abstracts, Poster : Transposition of Semitendinosus
Powered By VIN

Friendly Reminder to Our Colleagues: Use of VIN content is limited to personal reference by VIN members. No portion of any VIN content may be copied or distributed without the expressed written permission of VIN.

Clinicians are reminded that you are ultimately responsible for the care of your patients. Any content that concerns treatment of your cases should be deemed recommendations by colleagues for you to consider in your case management decisions. Dosages should be confirmed prior to dispensing medications unfamiliar to you. To better understand the origins and logic behind these policies, and to discuss them with your colleagues, click here.

Images posted by VIN community members and displayed via VIN should not be considered of diagnostic quality and the ultimate interpretation of the images lies with the attending clinician. Suggestions, discussions and interpretation related to posted images are only that -- suggestions and recommendations which may be based upon less than diagnostic quality information.


777 W. Covell Blvd., Davis, CA 95616



  • Toll Free: 800-700-4636
  • From UK: 01-45-222-6154
  • From anywhere: (1)-530-756-4881
  • From Australia: 02-6145-2357