除非脂肪酶的分泌量显著下降,胰腺外分泌功能不足不一定引起脂肪泻。对轻～中度分泌不足的诊断有赖于对胰酶的直接检测,但是,收集十二指肠内胰液或测定小肠内胰酶的含量在技术上甚为困难,因而不断有人探索间接检测方法。N-苯甲酰-L-酪氨酸-对氨基苯甲酸 Unless the secretion of lipase decreased significantly, lack of pancreatic exocrine function may not cause steatorrhea. The diagnosis of mild to moderate hypothyroidism relies on the direct detection of pancreatin, however, collecting intraduodenal pancreatic juice or determining the content of trypsin in the small intestine is technically difficult and there are continually explored indirect detection methods. N-benzoyl-L-tyrosine-p-aminobenzoic acid