If the scratch test is positive, the patient has IgE on the skin's mast cells that is specific to the food being tested. 对病人消化一定量乳糖酶的能力有很多诊断试验，医生通过分析血液标本的实验结果推测人体的反应。
A spontaneous breathing trial is the major diagnostic test to determine whether patients can be successfully extubated. 自主呼吸试验是以确定病患是否可以成功地拔管主要诊断性试验。
