实验室检查值与电解质练习卷（附答案）

Which antibody test is most specific for rheumatoid arthritis?

1. AAnti-CCP antibodies
2. BAnti-HBs antibody
3. CAntinuclear antibody
4. DAnti-D antibody

In a person with HIV infection, a CD4 count below which level defines AIDS?

1. A1,000 cells/µL
2. B500 cells/µL
3. C200 cells/µL
4. D50 cells/µL

Which findings are typical of a low serum magnesium?

1. APolyuria, extreme thirst and pale urine
2. BTremor, hyperreflexia and cardiac arrhythmias
3. CJaundice, itching and pale stools
4. DLoss of reflexes, flushing and slow breathing

A patient with iron-deficiency anemia started oral iron. Which result is usually the earliest sign that treatment is working?

1. AA fall in the white cell count
2. BA rise in the platelet count
3. CA fall in the mean cell volume (MCV)
4. DA rise in the reticulocyte count

Why is a baseline platelet count taken before starting heparin therapy?

1. ASo a later fall from heparin-induced thrombocytopenia is detected
2. BBecause heparin is given at a dose based on the platelet count
3. CBecause heparin increases the platelet count to dangerous levels
4. DSo that the INR can be calculated from the platelet count later

一名因房颤服用华法林的患者 INR 为 5.2，无出血。护士最好的措施是什么？

1. A给予双倍剂量
2. B给予通常的剂量，一个月后复查
3. C暂停华法林剂量并通知开医嘱者
4. D建议患者从今天起不再吃绿叶蔬菜

患者早晨服药后 2 小时抽取的血锂水平为 1.0 mEq/L，开医嘱者打算增加剂量。护士应指出什么？

1. A血锂水平可在一天中任何时间采集而不影响结果
2. B样本是在服药后太早采集的，因此不是有效的水平
3. C水平已达中毒，因此应永久停用锂盐
4. D水平太低，因此大幅增加显然是安全的

An older adult has bone pain, fatigue and frequent infections. Results show anemia, a calcium of 12.4 mg/dL (3.1 mmol/L), a raised total protein and a rising creatinine. Which condition should be suspected?

1. AMultiple myeloma
2. BAcute viral hepatitis
3. CPrimary hypothyroidism
4. DIron-deficiency anemia