Schabel S I, Skucas J
Radiology. 1977 Mar;122(3):835-6. doi: 10.1148/122.3.835.
Esophageal obstruction was encountered in 2 patients following the adminstration of a barium sulfate tablet. The tablets did not disintegrate for over three hours. They had been stored in the radiology department for at least three years. In vitro tests showed that the old tablets did not disintegrate for three hours while fresh tablets disintegrated within 30 minutes.
2名患者在服用硫酸钡片后出现食管梗阻。这些药片超过3小时都没有崩解。它们已在放射科存放了至少3年。体外试验表明，旧药片3小时内未崩解，而新鲜药片在30分钟内就崩解了。
