Orthopedics

Synovial membrane lines all diarthrodial joints. Synoviocytes are macrophage like cells which phagocytize foreign materials and produce synovial fluid which contains the two lubricants hyaluronic acid and polysulfated glycosaminoglycans. The normal synovial membrane is a poor filter, allowing all components of blood into the joint fluid except cells, platelets, and large molecules such as fibrinogen.

OCD of the hock occurred bilaterally in 42% of the reported cases. The lateral trochlear ridge is involved in 25% of the cases and the medial trochlear ridge in 75% of the cases.

The best treatment for degenerative joint disease is prevention, by removing the inciting cause before DJD is established if at all possible (TPO, JPS, cruciate stabilization, patella stabilization, etc.) Irreversible changes of DJD (visible in the form or periarticular osteophytes) are present by 28 days after the cause is present.

The patella is a type A (primary function is articulation) sesamoid bone located in the tendon of insertion of the quadraceps muscles. The origins of the quadriceps muscles are the proximal femur and immediately cranial to the acetabulurn (rectus femoris m.). The quadriceps m. follows a straight line, by necessity, to its insertion at the tibial crest.

Agenesis and malformation of the phalanges, metacarpal and carpal bones in utero is the basic pathology, and is occasionally accompanied by subluxation of the elbow.

Thorax: Many dogs with pneumothorax (hemothorax, chylothorax, diaphragmatic hernia, etc) are able to ventilate marginally but adequately when at rest in a cage. The loss of lung/ventilation capacity may not become clinical for several minutes after induction of general anesthesia or during recovery.

New information on treating medial patellar luxation in dogs.

Watch our August 2011 issue for results of the survey.

Orthopedic infections should also be thought of as infections involving the bones (osteitis or osteomyelitis), joints and surrounding support structures (periostitis, myelitis, cellulitis). Typically when we think of orthopedic infections we think of infections resulting after orthopedic surgery.

The coxofemoral joint is a ball and socket joint. Normal stability of the hip is provided through a combination joint capsule, ligament of the head of the femur and dorsal acetabular rim. In addition, the joint fluid and acetabular labrum including the ventral acetabular ligament and extraarticular soft tissue structures such as the gluteals, adductors and abductors of the hip joint provide secondary stability.

There are more and more options out there for our patients in the way of braces, orthotics and assistive devices. They can provide much needed help during or after rehab, surgical recovery, as an alternative to surgery and our geriatric patients.

The goal in management of open fractures is to prevent further contamination, prevent additional damage to the bone and surrounding soft tissues especially nerve and vascular supplies and facilitate timely stabilization.

The workload of a police dog or a bird dog creates varying medical issues which can be dependent upon their physical condition. If they are not conditioned to handle the workload exertional medical problems can arise. Another cause of medical problems in these dogs is related to the environments in which they work.

Lameness is defined as a variance from normal gait. There are two types of lameness: anatomical and pathologic. Anatomical lameness may not necessarily be from pain, and can be genetic or acquired. Chondroplasia in the Alaskan Malamute is a genetic condition that would produce lameness.

The distal limb is exposed to many traumatic events as a result of its almost constant interaction with the ground. The distal limb is defined as the anatomical structures from the carpus to the distal end of the front and rear limbs. In this area the skin has minimal muscle and fat under it for cushion.

Animal movement has been a subject of research for a long period of time. Both qualitative and quantitative gait analyses have been used to analyze canine movement. Veterinarians, breeders, owners, and trainers all can potentially benefit from the recent advances in gait analysis.

The veterinary profession is currently witnessing an increased demand from our clientele for information concerning performance of the canine athlete. The expectations come as a result of the scientific advancements in human sports medicine. If a pet owner is only interested in companionship, minimal stress will be placed upon the pet's body.

The patella or kneecap is the largest sesamoid bone in the body and one of 4 in the stifle, the other three being the 2 of the gastrocnemius and the popliteal muscle. The patella lies within the tendon of insertion of the quadriceps muscle. The part of the tendon between the apex or distal aspect of the patella and its insertion on the tibial tuberosity is called the patellar ligament.

The most significant change in recent years in the management of fractures has been the more recent emphasis on "biologic fixation" as opposed to "mechanical fixation". The latter refers to the direct fixation techniques whereby fractures are reconstructed anatomically, and the former refers to indirect fixation techniques whereby the fractures are spanned (or "bridged").

Bridging reconstruction plates were the first implant used with success in the human mandible. Despite their greater ease of use and application in this location as compared to conventional plates, the low perioperative morbidity was unfortunately followed by high long-term morbidity.

Veterinary physical therapy is the process of reconditioning body tissues that have been injured or diseased to their previous state or to a manageable state. Potential applications include recovery from medical cases, injuries, or post-surgical cases. There are three factors to consider in a designing rehabilitation regimen.

The basis of plating, as originally described by the AO, has been: 1) anatomic fracture reduction and fixation, 2) rigid fracture stability (compression or splinting), 3) preservation of the blood supply to the soft tissues and bone through careful handling and gentle reduction techniques, and 4) early and safe mobilization of the area.

The elbow joint or cubital joint is composed of three joints: humeroradial, humeroulnar and proximal radioulnar. The joint capsule includes all three joints with one space. The radial head articulates with the capitulum of the humerus whereas the ulna articulates with the trochlea.

Retrievers can have work-related conditions or they can have genetic conditions. A common work-related problem is related to overheating. A medical condition seen in Labrador Retrievers is Exercise-induced Collapse.

An understanding of the functional anatomy is the prerequisite for successful application of the fracture fixation devices in the unfamiliar location of the mandible. These biomechanical principals must account not only for the very large forces generated, but also the position of the teeth that can – and often do – interfere with implant application.

A controversy exists in the veterinary field as to which surgical technique is the best to repair a dog's knee that has a cranial cruciate ligament (CrCL) injury. There are many accepted surgical techniques described (over 40 different methods) to correct the CrCL-deficient joint.

Severe fractures of the femur can be divided into those fractures which must be reconstructed directly and those that can (and should) be reconstructed indirectly. The former include both intra-articular and periarticular fractures of the femoral head and femoral condyles, and diaphysis in the latter.

Columbia, Mo. - While Dr. James Cook decided early on in life to tackle joint replacements, it was a circuitous route-a path that involved professional water skiing, substitute teaching and a man named Robert Gordon-that led him to the brink of a major discovery.

Why you may want to consider a total hip replacement in a large dog.