1,720,997 research outputs found
The navigation system in total hip replacement
No full textRecently it has been increasing the interest of theorthopaedic surgeon about those tools or devices to optimize the results of the replacement surgery. In fact in the last few years the incidence of operations executed in order to treat patients affected by osteoarthritis of the hip with THR is increased, and so the need ness of giving back more long-lived implants.
For this reason new navigation systems, based CT have been developed, which, during surgey, can make the positioning hip and knee prosthesis easier. A pool of international workers (surgeon, engineers, etc.) has developed recently an articular navigation system based on surgery reliefs, using tools gauged and provided with visible markers detected by a computerized system which uses infrared cameras.
In fact it is not based on CT images of thehip, but on direct data (kept during the operation) analysis, and for this reason the procedure should be more accurate
Osteoid osteoma: CT-guided radio-frequency ablation
No full textPurpose. This work aimed to evaluate the feasibility, safety and efficacy of computed Tomography (CT)-guided radio-frequency (RF) treatment for the in situ treatment of osteoid osteoma. Materials and methods. Since March 1997, 17 patients (14 males, 3 females) with 18 osteoid osteomas underwent CT-guided radio-frequency thermal ablation. Lesions were located in the femur (n=13), tibia (n=3), radius (n=1) and ulna (n=1). All patients had presumptive diagnosis of osteoid osteoma on the basis of clinical and radiographic findings. The duration of pain before treatment ranged between 6 and 18 months (mean: 9 months). Of the 18 procedures, 15 were performed percutaneously while 3 others were performed after surgical exposure of the bone. No surgical treatments were performed before RF ablation. A 17-gauge electrode needle with 2-cm exposed tip was introduced into the nidus through an 11-gauge biopsy set. Results. All the procedures were technically successful. Of 17 patients, 14 were completely free of pain within 2 days post-treatment. In two patients, complete relief from pain was achieved after a second RF ablation. In another case, no clinical response was observed; the patient refused to repeat treatment and underwent surgery. Two cases had superficially dermal burns with skin and soft tissue necrosis. © 2001, Elsevier B.V
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