a urine pregnancy test

NCLEX-RN

NCLEX RN Predictor Exam

1. A urine pregnancy test:

A. May be negative even if a blood pregnancy test is positive.
B. Is positive only during the first trimester of pregnancy.
C. Will be negative if the amount of LH isn't enough to meet or exceed the sensitivity of the testing device.
D. All of the above.

Correct answer: A

Rationale: A urine pregnancy test detects HCG in a pregnant woman's urine. Blood levels of HCG are usually higher and register earlier than HCG levels in the urine. Choice A is correct because urine pregnancy tests may be negative even if a blood pregnancy test is positive due to the differences in HCG levels in blood and urine. Choice B is incorrect because a urine pregnancy test can be positive throughout pregnancy, not just in the first trimester. Choice C is incorrect because LH (luteinizing hormone) is not the hormone detected in a pregnancy test; it is HCG (human chorionic gonadotropin). Choice D is incorrect because not all the statements provided are true.

2. Which of these statements is true regarding the use of Standard Precautions in the healthcare setting?

A. Standard Precautions apply to all body fluids, except sweat.
B. Alcohol-based hand rub should be used if hands are not visibly dirty.
C. Standard Precautions are intended for use with all patients, regardless of their risk or presumed infection status.
D. Standard Precautions are to be used only when non-intact skin, excretions containing visible blood, or expected contact with mucous membranes are present.

Correct answer: C

Rationale: Standard Precautions are designed to reduce the risk for transmission of microorganisms from both recognized and unrecognized sources. They are intended for use with all patients, regardless of their risk or presumed infection status. Standard Precautions apply to all body fluids, secretions, and excretions except sweat - whether or not they contain visible blood, non-intact skin, or mucous membranes. Hands should be washed with soap and water if visibly soiled with blood or body fluids. Alcohol-based hand rubs can be used if hands are not visibly soiled. Choice A is incorrect because Standard Precautions apply to all body fluids, secretions, and excretions except sweat. Choice B is incorrect because alcohol-based hand rub should be used when hands are not visibly dirty. Choice D is incorrect because Standard Precautions are not limited to situations involving non-intact skin, excretions with visible blood, or expected mucous membrane contact.

3. After instructing the client on crutch walking technique, the nurse should evaluate the client's understanding by using which of the following methods?

A. Return demonstration
B. Explanation
C. Achievement of 90 on written test
D. Have the client explain the procedure to the family

Correct answer: A

Rationale: After teaching the client on crutch walking technique, assessing the client's understanding is crucial. The most effective method to evaluate the client's comprehension of a hands-on skill like crutch walking technique is through a return demonstration. This allows the nurse to observe the client performing the technique, ensuring they have grasped the instructions correctly and can execute the skill safely. While providing an explanation can help clarify doubts, it may not confirm the client's ability to perform the skill. Achieving a high score on a written test assesses cognitive understanding but not necessarily the practical application of the skill. Having the client explain the procedure to the family does not directly assess their ability to perform the skill themselves; it tests their ability to communicate the information to others.

4. When considering the concepts related to blood pressure, which statement best describes the concept of mean arterial pressure (MAP)?

A. MAP is the pressure of the arterial pulse.
B. MAP reflects the stroke volume of the heart.
C. MAP is the pressure forcing blood into the tissues, averaged over the cardiac cycle.
D. MAP is an average of the systolic and diastolic blood pressures and reflects tissue perfusion.

Correct answer: C

Rationale: Mean Arterial Pressure (MAP) is the pressure that forces blood into the tissues, averaged over the cardiac cycle. It is not the pressure of the arterial pulse (Choice A), nor does it directly reflect the stroke volume of the heart (Choice B). While MAP involves systolic and diastolic pressures, it is not simply an average of these two values as diastole lasts longer. Instead, MAP is closer to diastolic pressure plus one third of the pulse pressure. The best description of MAP is that it represents the pressure forcing blood into the tissues, averaged over the cardiac cycle.

5. The abbreviation pc is defined as ________________.

A. before the meal
B. with the meal
C. after the meal
D. post corpi

Correct answer: C

Rationale: The correct answer is C: 'after the meal.' In medical terminology, 'pc' is an abbreviation for 'post cibum,' which means 'after eating' or 'after the meal.' This term is used to indicate when a medication should be taken concerning meals. Choices A, B, and D are incorrect. 'Before the meal' (A) is typically abbreviated as 'ac,' 'with the meal' (B) is abbreviated as 'pc,' and 'post corpi' (D) is not a valid medical abbreviation or term.