Clinical characteristics and imaging features of rheumatism-related lung damage in children / 中华实用儿科临床杂志

Objective To explore the clinical manifestations and imaging features of rheumatism-related lung damages in children in order to improve the understanding of the disease.Methods The clinical data from 16 children hospitalized in provincial Hospital Affiliated to Shangdong University from Sep.2007 to Mar.2012 with rheumatism-related lung damage were analyzed retrospectively and the literature data were reviewed.Results In 16 children with rheumatism-related lung damages,the primary problems included systemic lupus erythematosus in 6 children,juvenile idiopathic arthritis and juvenile dermatomyos in 5 children respectively.Four children (25％) exhibited the respiratory symptoms and 12 children (75.0％) exhibited the subclinical symptoms.Through chest CT,the positive results were showed in all 16 children.Among them,12 children (75.0％) were found to have interstitial lung disease,6 children (37.5％)were found to have lesion of pleura and 5 children (31.3％)to have lung parenchyma lesions.Sixteen children were all treated with glucocorticoid,moreover,14 of them (87.5％)were also given the combination therapy with immunosuppressive agents.Thirteen children(81.3％)exhibited a symptom improvement,3 children died,in which,2 children died of respiratory failure caused by lung damage.Conclusions The clinical manifestations of rheumatismrelated lung damage in children are various and latent with the different severity of condition.It has a higher mortality.The changes through the chest CT are mainly pulmonary interstitial damage and pleurisy,also they are earlier than those in clinic and chest film,thus helping to find earlier lung damage.The early glucocorticoid combined with immunosuppressive therapy is expected to improve the prognosis.

Precautions of physical performance requirements and test methods during product standard drafting process of medical devices / 中国医疗器械杂志

The major idea of this article is to discuss standardization and normalization for the product standard of medical devices. Analyze the problem related to the physical performance requirements and test methods during product standard drafting process and make corresponding suggestions.

An indispensable assistant for the vascular stent designing and testing: the finite element analysis method / 中国医疗器械杂志

This article reviews the recent progress of the finite element analysis (FEA) researches focusing on various expansion types, fatigue durability and the flexibility of the stents.