Radiofrequency energy on cortical bone and soft tissue: a pilot study.

Background: Radiofrequency-generating energy devices have been used clinically in musculoskeletal procedures to provide hemostasis and capsular shrinkage (thermal capsulorrhaphy). However, the dose-effects are not well known.

Questions/purposes: We therefore determined dosage effects of radiofrequency energy on bone, skin incisions, and joint capsule in sheep.

Effects of triamcinolone acetonide, sodium hyaluronate, amikacin sulfate, and mepivacaine hydrochloride, alone and in combination, on morphology and matrix composition of lipopolysaccharide-challenged and unchallenged equine articular cartilage explants.

Objective: To evaluate the effects of triamcinolone acetonide (TA), sodium hyaluronate (HA), amikacin sulfate (AS), and mepivacaine hydrochloride (MC) on articular cartilage morphology and matrix composition in lipopolysaccharide (LPS)-challenged and unchallenged equine articular cartilage explants.

Sample Population: 96 articular cartilage explants from 4 femoropatellar joints of 2 adult horses.

Procedures: Articular cartilage explants were challenged with LPS (100 ng/mL) or unchallenged for 48 hours, then treated with TA, HA, AS, and MC alone or in combination for 96 hours or left untreated.

Gross, histologic, and gene expression characteristics of osteoarthritic articular cartilage of the metacarpal condyle of horses.

Objective: To identify patterns and correlations of gross, histologic, and gene expression characteristics of articular cartilage from horses with osteoarthritis.

Animals: 10 clinically normal horses and 11 horses with osteoarthritis of the metacarpal condyles.

Procedures: Metacarpophalangeal joints were opened and digitally photographed, and gross lesions were scored and quantified.

Effective bone hemostasis and healing using radiofrequency and conductive fluid.

Hemostasis in bone is difficult to achieve because of the mineral content. Current techniques often are ineffective, can have systemic effects, or leave residual material in the wound. Our hypotheses were that a wand device coupling radiofrequency energy with a cooling conductive saline solution, applied topically to bone, could produce superior hemostasis compared with conventional electrocautery or no treatment, and not impede bone healing.

Response of induced bone defects in horses to collagen matrix containing the human parathyroid hormone gene.

Objective: To determine whether human parathyroid hormone (hPTH) gene in collagen matrix could safely promote bone formation in diaphyseal or subchondral bones of horses.

Animals: 8 clinically normal adult horses.

Procedure: Amount, rate, and quality of bone healing for 13 weeks were determined by use of radiography, quantitative computed tomography, and histomorphometric analysis.

A durable load bearing muscle to prosthetic coupling.

Skeletal muscles have been successfully linked to power mechanical support devices acutely. However, the required load bearing muscle to prosthetic interfaces have not been consistently durable. Tissue simply may not tolerate the repetitive pressure generated, ranging to 40,000 mm Hg, when necessary forces meet the crosssectional areas accessible by suture or clamp fixation.

A surface-modified chylomicron remnant-like emulsion for percutaneous computed tomography lymphography: synthesis and preliminary imaging findings.

Rationale And Objectives: To assess a surface-modified emulsion as a percutaneous CT lymphographic agent in normal dogs.

Methods: An iodinated chylomicron remnant-like microemulsion was formulated with a mean particle size of 91.3 nm and an iodine concentration of 91 mg I/mL.