Authors: Antje Hinz Med Vet, Andrew T. Fischer Jr DVM, Diplomate ACVS
Journal: Veterinary Surgery

To compare the accuracy of ultrasonographic and radiographic examination for evaluation of articular lesions in horses.
Study Design
Cross-sectional study.
Horses (n = 137) with articular lesions.
Radiographic and ultrasonographic examinations of the affected joint(s) were performed before diagnostic or therapeutic arthroscopic surgery. Findings were recorded and compared to lesions identified during arthroscopy.

Journal: Veterinary Radiology and Ultrasound

Ultrasonography has gained increased utility to diagnose pelvic fractures in horses; however, internal pelvic contours can be difficult to appreciate from external palpable landmarks. We developed three-dimensional (3D) simulations of the pelvic ultrasonographic examination to assist with translation of pelvic contours into two-dimensional (2D) images. Contiguous 1 mm transverse computed tomography (CT) images were acquired through an equine femur and hemipelvis using a single slice helical scanner.

Category: Equine - Ultrasound
Authors: William M. Karlin, DVM, MS; Allison A. Stewart, DVM, MS; Sushmitha S. Durgam, BVSc; James F. Naughton, DVM, MS; Kristen J. O'Dell-Anderson, DVM, MS; Matthew C. Stewart, BVSc, PhD
Journal: American Journal of Veterinary Research

Objective—To evaluate tendon injuries in horses over a 16-week period by use of ultrasonography and low-field magnetic resonance imaging (MRI).

Sample—Tendons of 8 young adult horses.

Procedures—The percentage of experimentally induced tendon injury was evaluated in cross section at the maximal area of injury by use of ultrasonography and MRI at 3, 4, 6, 8, and 16 weeks after collagenase injection. The MRI signal intensities and histologic characteristics of each tendon were determined at the same time points.

Category: Equine - MRI - Tendon - Ultrasound
Authors: M. Seignour, H. Pasquet, V. Coudry, J.-M. Denoix
Journal: Equine Veterinary Education

Foot pain is the most common cause of lameness in horses. In sport horses, podotrochlear syndrome (‘navicular syndrome’) is reported to be the most frequent condition affecting the front foot. Ultrasonography has the potential to detect damage to the soft tissues as well as the bone surfaces; in some clinics it has become the technique of choice for the identification and documentation of many podotrochlear injuries.

Category: Equine - Tendon - Ultrasound
Authors: Federica ter Woort DMV, Virginie De Busscher DMV, DipECVDI, MRCVS and Christopher B. Riley BVSc, PhD, Dipl. ACVS, PCIM
Journal: Journal of Equine Veterinary Science

A 4-year-old Quarter Horse gelding with a history of acute trauma was presented to our faculty. This report describes the inciting injury, documented in a video, and the ultrasonographic diagnosis of a traumatic extrusion of the right lateral meniscus with an accompanying extra-articular hematoma and distal collateral ligament lesion in a competing Quarter Horse. The ultrasonographic diagnosis of a lateral meniscal injury directly correlated with postmortem findings and this type of lateral meniscal injury has not been previously described in detail.

Journal: Veterinary Radiology & Ultrasound

Foot pain is an important cause of lameness in horses. When horses with foot pain have no detectable radiographic abnormalities, soft-tissue assessment remains a diagnostic challenge without magnetic resonance (MR) imaging. Ultrasonography can provide an alternative to MR imaging when that modality is not available but the extent of changes that might be seen has not been characterized. We reviewed the ultrasonographic findings in 39 horses with lameness responding positively to anesthesia of the palmar digital nerves and without radiographically detectable osseous abnormalities.

Category: Equine - Lameness - Ultrasound
Authors: Sara Boehart, cand med vet Gisela Arndt, Dr rer pol Georg Rindermann, Dr med vet Maria Gmachl, med vet Bianca Carstanjen, Dr med vet, DEA, PhD
Journal: American Journal of Veterinary Research

Objective—To obtain morphometric values for the superficial digital flexor tendon, deep digital flexor tendon, accessory ligament of the deep digital flexor muscle, and suspensory ligament in the palmar metacarpal region of Icelandic Horses.

Animals—50 nonlame Icelandic Horses in training.

Category: Equine - Ligament - Tendon - Ultrasound
Journal: Veterinary Radiology and Ultrasound

The transrectal ultrasonographic appearance of the lumbosacral joint was assessed in 43 horses with no history or clinical evidence of back pain or hindlimb lameness. In the majority of horses (34/43, 79.1%) the lumbosacral disc had uniform or mildly heterogeneous echogenicity. However, variation in the ultrasonographic appearance of the lumbosacral joint was also identified, including hyperechogenic regions within the lumbosacral disc with or without an acoustic shadow, and mild or moderate irregularity of the opposing surfaces of the last lumbar and the first sacral vertebral bodies.

Category: Equine - Spine - Ultrasound
Journal: Veterinary Radiology & Ultrasound

Tendon injuries are common in athletic humans and horses. Ultrasonography is the diagnostic method of choice in horses with tendon injuries but there is increasing application of magnetic resonance (MR) imaging to monitor and follow-up tendon healing. A core lesion was created in the superficial digital flexor tendon (SDFT) of each forelimb of four horses. One of the four horses was euthanized at 2, 4, 8, and 12 weeks after creation of the lesion. MR examinations of the SDFT were performed immediately post mortem in a 1.5 T Siemens Symphony magnet and compared with histologic findings.

Authors: A. Tnibar, M. T. Christophersen and C. Lindegaard
Journal: Equine Veterinary Education

This retrospective study describes ultrasound guided desmotomy of the accessory ligament of the deep digital flexor tendon in 35 cases, and a modification of this procedure using an adapted surgical instrument. The procedure was successful in 97% of cases. Wound healing was excellent in all except 4 cases. Corrective shoeing prior to surgery contributes to success. The procedure can be performed on the standing horse and offers the advantages of minimally invasive surgery which include: reduced incision length, reduced morbidity and improved cosmetic outcome.

Category: Equine - Ligament - Ultrasound