实验室检查值与电解质练习卷（附答案）

C 反应蛋白（CRP）升高主要说明什么？

1. A特指肾衰竭
2. B体内有炎症
3. C特指心脏病发作
4. D脱水和体液丢失

A low mean corpuscular hemoglobin concentration (MCHC) means that the red cells are:

1. AShaped like a sickle
2. BLarger than normal (macrocytic)
3. CPaler than normal (hypochromic)
4. DMore numerous than normal

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

1. A50 cells/µL
2. B200 cells/µL
3. C1,000 cells/µL
4. D500 cells/µL

A patient has started parenteral nutrition (PN) through a central line. Which test is monitored most frequently in the first days?

1. ABlood glucose
2. BSerum lipase
3. CThyroid hormones
4. DHemoglobin A1c

A patient taking a statin reports new, unexplained muscle pain and weakness. Which laboratory test would the nurse expect to be ordered?

1. ACreatine kinase (CK)
2. BSerum ammonia
3. CSerum lipase
4. DCardiac troponin

How often is the INR usually checked when warfarin is first started?

1. AEvery few days, until it is stable
2. BOnly if bleeding occurs at home
3. CEvery hour, during the first week
4. DOnce a year, at a routine visit

A patient with a stable INR on warfarin starts rifampin (rifampicin) for tuberculosis. Two weeks later the INR is 1.3. What is the most likely explanation?

1. ATuberculosis causes the INR to fall
2. BRifampin raises the INR, so it is wrong
3. CRifampin speeds up warfarin metabolism
4. DRifampin contains a lot of vitamin K

A patient with acute kidney injury has a potassium of 6.8 mEq/L despite medical treatment, a pH of 7.12 and pulmonary edema not responding to diuretics. Which treatment is most likely needed?

1. AAn IV magnesium dose
2. BA potassium supplement
3. CUrgent dialysis
4. DMore oral fluid