周围动脉闭塞性疾病彩色多普勒超声检查

为评价ＣＤＵＳ在周围动脉闭塞性疾病检查中的应用价值。对５６例经血管造影对照或／和手术病理及临床住院确诊的患者进行ＣＤＵＳ、ＣＷ、ＰＰＧ和ＳＢＰ检查，男４６例，女１０例，年龄１９～８０岁。ＣＤＵＳ与出院诊断的符合率为９８．２％，ＣＤＵＳ、ＣＷ、ＰＰＧ、ＳＢＰ对１１４条（处）病变血管的显示符合率分别为：９７．４％、６３．２％、４２．１％、６４．０％。ＣＤＵＳ是周围动脉闭塞性疾病最佳无创伤检查方法之一。

AN EXPERIMENTAL STUDY ON THE DEGENERATION OF ADJACENT FACET JOINTS INDUCED BY SPINAL FIXATION (ULTRASTRUCTURE INVESTIGATION)

Objective To study the ultrastructural changes in the adjacent facet joints induced by spinal fixation. Metheds Transmission and scanning electronic microscopies were performed on the cartilage of 2 adjacent facet joints cephalic to the multi-segment spinal fixation in 10 sheep models at 3 months and 6 months postoperatively.Results The ultrastructure observation at 3 months showed minor lesions in the matrix of cartilage. The chondrocytes were hyperactive in synthetic and secretory function.At 6 months, the lesions in the matrix were aggravated and most of chondrocytes were degenerative.The first and second adjacent facet joints cephalic to the spinal fixation were found to have similar morphological evidences of degeneration in the whole course of observation. Conclusion The degeneration of the adjacent facet joints induced by spimal fixation is mainly attributed to the high stress environment of the adjacent segments.