On-pump beating-heart coronary artery bypass grafting is the preferred method of emergency myocardial revascularization for patients with acute myocardial infarction who might tolerate cardioplegic arrest poorly. It has lower postoperative mortality and morbidity than conventional coronary artery bypass grafting.

This study identified previous history of fracture and remnants of internal fixation as major risk factors of infection after TKA. For clinical relevance, surgeons should be aware of potential infection when performing TKA in patients with these risk factors and patients should be informed of the potential risks.

Methods. Synovial tissue specimens were obtained from patients with RA or patients with osteoarthritis (OA) who were undergoing joint replacement surgery, and synovial MCs were enzymatically dispersed. Cultured synovium-derived MCs were generated by culturing synovial cells with stem cell factor, and receptor expression was analyzed using fluorescenceactivated cell sorting. Mediators released from MCs were measured using enzyme immunoassays or enzymelinked immunosorbent assays. Results. Primary synovial MCs and cultured synovium-derived

Tectoplasty is a new acetabuloplasty which aims to provide an extra-articular weight-bearing surface in cases of dysplastic acetabulum, hip subluxation or dislocation with a false acetabulum. The lateral wall of the iliac bone at the lateral edge of the affected acetabulum is raised as a proximally-based flap and massive bone grafts are inserted to provide a congruous, non-absorbable roof for the capsule and femoral head. An advantage is that the weight-bearing surface can be formed away from the original acetabulum, wherever the dislocated or subluxated femoral head may lie. Of 34 hips with congenital dislocation or severe subluxation treated by this method, 27 were evaluated after an average follow-up of 12 years. At review the patients averaged 35 years of age and satisfactory results with good relief of pain had been obtained in 78%. The results were unsatisfactory when degenerative changes had already developed before operation. Tectoplasty is indicated for pain due to congenital subluxation or dislocation of the hip under the age of thirty, in the absence of advanced osteoarthritis.

The cases histories of 51 rheumatoid arthritis patients (58 hands) were examined retrospectively with respect to the incidence of tendon rupture. Factors that were associated with tendon rupture such as X-ray changes in the wrist joint and clinical findings of the hand preceding the tendon rupture were statistically analysed. In a separate study, prophylactic tenosynovectomy and wrist synovectomy were performed on 42 joints in 35 patients who had two or more risk factors. This group of patients was then analysed for subsequent tendon rupture and recurrent synovitis. The risk factors for the extensor tendon rupture in the dorsal wrist joint were found to be: dorsal dislocation of the distal ulna; a scallop sign on X-ray; and tenosynovitis persisting for at least 6 months. Prophylactic surgery effectively prevented rupture of the tendons in patients who had two or more risk factors for extensor tendon rupture.