Equine Veterinary Education最新文献

This case report describes the unusual presentation of an intra-articular solitary osteochondroma in a 7-year-old Warmblood horse associated with fetlock distention and lameness. The osteochondroma was situated at the level of the distal physis of the plantar surface of the third metatarsal (MTIII) bone within the metatarsophalangeal joint and was successfully removed by arthroscopy. The owner reported a good clinical outcome 6 months after surgery, with no visible lameness at walk and trot. To the authors' knowledge, this case report has documented for the first time an intra-articular solitary osteochondroma at the level of the distal physis of the plantar surface of the MTIII bone.

The case report in this issue by Payette and colleagues highlights a few interesting topics and gives us the opportunity to discuss clinical signs associated with neck pain and strategies to prevent septic and nonseptic venous thrombosis in equine patients. The case illustrates the devastating consequences that septic thrombophlebitis can have on distant body systems, and in this commentary, we have highlighted several techniques that coupled with the selection of the appropriate intravenous catheter (IVC) and strategies aimed at reducing bacterial contamination of an IVC, can lead to a dramatic decrease in events of thrombosis and thrombophlebitis and a longer lifespan of the IVC. Furthermore, advances in diagnostic and management strategies for horses with neck disorders continue to provide clinicians with options for complicated cases that previously may have been unthinkable.

A 16-year-old Warmblood gelding had historically been evaluated for a chronic right forelimb lameness, localised with a palmar digital nerve block. The lameness was recurrent despite medication of the right fore distal interphalangeal joint. Magnetic resonance imaging (MRI) showed proliferative intermediate-to-low signal tissue in the location of the dorsal recess of the distal interphalangeal joint, with an overlying defect in the common digital extensor tendon. Given persistent right forelimb lameness over the following 24 months, with no improvement to the medication of the distal interphalangeal joint, a palmar digital neurectomy was performed. Three months following the neurectomy, the patient presented for a grade 4/5 right forelimb lameness. There was a firm, expanding swelling around the coronary band. Repeat diagnostic analgesia showed resolution of the lameness with local infiltration of anaesthetic around the firm swelling. At surgery, a soft tissue mass was surgically resected en bloc. The mass was histologically identified as a keratoma. To the authors' knowledge, there are no published reports of keratoma proximal to the coronary band that does not involve the hoof wall structure or underlying middle phalanx. Surgical removal of the keratoma resulted in significant improvement in right forelimb lameness at the 11-week post-op recheck and resolution of the right forelimb lameness 15 weeks post-operatively.

A 12-year-old Warmblood gelding was presented with acute, nonweightbearing left hindlimb lameness. A foreign object was detected in the toe area of the solar surface. Radiographic examination confirmed foot penetration by a metal object, perforating the distal phalanx and dorsally reaching the lamellar dermis. Standing surgical exploration was performed. After manual removal of the object, a small circular opening in the dorsal hoof wall was created to facilitate debridement and flushing of the complete tract. Radiographically, the distal phalanx presented an irregular circular defect (35 × 33 mm) at the dorsal half of the sole just medial to the sagittal plane, without other lesions. The horse received broad-spectrum antimicrobial and nonsteroidal anti-inflammatory treatment. Lameness decreased gradually and the lesion presented progressive granulation and epithelisation. After 4 weeks, the horse was discharged from the hospital. A final cast change was performed during an ambulatory check-up at the hospital 2 weeks later. At that stage, epithelisation was complete, and first signs of keratinisation were observed. Further follow-up was performed by the referring veterinarian. The horse resumed its previous level of exercise in a riding school. Six-month follow-up did not reveal lameness; radiographically, the circular defect in the distal phalanx remained visible yet without other abnormalities.

This report describes the use of locking compression plates (LCP) as external skeletal fixators (ESF-LCP) in the surgical repair of a bilateral open mandibular fracture in a foal. A 3-week-old 90-kg Swedish Warmblood colt presented with reluctance to nurse, bilateral mandibular swelling and haemorrhagic discharge from the mouth. Clinical examination and radiographs revealed a fracture of both mandibles, with complete fracture anatomy defined by computed tomography (CT). The right mandible had a complete, displaced, open fracture between the deciduous premolars Triadan 806 and 807. The left mandible had a minimally displaced, comminuted fracture in the caudal aspect of the interdental diastema (705–706). Both mandibles were surgically repaired using narrow 4.5 mm LCP plates as external skeletal fixators (ESF-LCP) under general anaesthesia. The ESF-LCPs were removed 36 days post-operatively after radiographic healing was observed. Three months post-operatively repeat radiographs were performed showing no abnormalities of the mandibular or dental function. At 3 years of age, a routine dental examination was performed that showed normal occlusion and function of the mandible with only a mild external callus. The use of LCP plates as ESF-LCP in a bilateral mandibular fracture in a neonatal foal resulted in an excellent outcome and complete fracture healing with minimal complications.