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60年代开始的双对比造影(简称DC)用硫酸钡制剂的研究,近来又有不少发展,特综述如下。一、钡剂粘度研究的近展在一定范围内硫酸钡的粘度与其浓度有一定线性关系。粘度增加后,流动性显著降低,这时难于均匀地涂布于粘膜上;如粘度过低,则其浓度不足以显示胃粘膜之细节。故研究的主要目的在提高浓度和降低粘度。目前市售钡剂中的EZ-HD 浓度达250%(W
60 pairs of double contrast imaging (referred to as DC) with barium sulfate preparations, there have been many developments, special reviews are as follows. A recent study of the viscosity of barium In a certain range of barium sulfate viscosity and its concentration have a certain linear relationship. Viscosity increases, the fluidity significantly reduced, then difficult to evenly coated on the mucosa; such as viscosity is too low, then its concentration is not enough to show the details of the gastric mucosa. Therefore, the main purpose of the study is to increase the concentration and reduce the viscosity. EZ-HD concentrations in commercial barium currently reach 250% (W