speciic gravity in urinalysis

NCLEX-RN

NCLEX RN Predictor Exam

1. Specific gravity in urinalysis:

A. compares the concentration of urine to that of distilled water
B. is useless when the patient is dehydrated
C. can only be measured using a refractometer
D. None of the above

Correct answer: A

Rationale: Specific gravity in urinalysis measures the concentration of solutes in urine compared to that of distilled water. This comparison helps in assessing the kidney's ability to concentrate urine properly. It is a valuable test even in dehydrated patients as it provides insights into renal function. Specific gravity can be measured using various methods, including a refractometer or reagent strips. Normal specific gravity readings of human urine typically range from 1.005 to 1.030. Choice A is correct as it accurately describes the purpose of specific gravity in urinalysis. Choices B and C are incorrect as specific gravity remains relevant in dehydrated patients and can be measured using different techniques, not solely a refractometer.

2. A client has become combative and is attempting to pull out his IV and take off his surgical dressings. The nurse receives an order to apply wrist restraints. Which action of the nurse signifies that restraints are being used safely?

A. The nurse ties the restraints in a square knot to prevent the client from untying them
B. The restraints are attached to a movable portion of the bed
C. The padded side of the restraint is applied next to the skin of the wrist
D. The nurse assesses the client's distal circulation every 24 hours

Correct answer: C

Rationale: Restraint use must prioritize the safety of the client. When applying restraints around the wrists, the padded side should be placed against the skin to help prevent skin breakdown. Additionally, restraints should be secured in quick-release knots to ensure they can be removed rapidly in case of an emergency. Choice A is incorrect as restraints should not be tied in a way that could prevent quick removal. Choice B is incorrect because restraints should not be attached to a movable part of the bed to avoid unintentional movement. Choice D is incorrect as assessing distal circulation is important but is not directly related to the safe application of restraints.

3. After change-of-shift report, which patient should the nurse assess first?

A. 72-year-old with cor pulmonale who has 4+ bilateral edema in his legs and feet
B. 28-year-old with a history of a lung transplant and a temperature of 101 F (38.3 C)
C. 40-year-old with a pleural effusion who is complaining of severe stabbing chest pain
D. 64-year-old with lung cancer and tracheal deviation after subclavian catheter insertion

Correct answer: D

Rationale: The patient with lung cancer and tracheal deviation after a subclavian catheter insertion should be assessed first. Tracheal deviation can indicate tension pneumothorax, a life-threatening condition that requires immediate intervention to prevent inadequate cardiac output or hypoxemia. While the other patients also need assessment, the potential for tension pneumothorax in the patient with tracheal deviation necessitates urgent attention to prevent complications.

4. Nursing care plans are _______________?

A. written by CNAs before they provide care
B. guidelines of care that all nursing team members use
C. used by nurses but not by nursing assistants
D. used by nursing assistants but not by nurses

Correct answer: B

Rationale: Nursing care plans are comprehensive documents created by registered nurses to outline individualized care for patients. These plans serve as guidelines for all members of the nursing team, including nursing assistants, to ensure consistent and quality care. Choice A is incorrect as CNAs typically assist in implementing the care plan rather than creating it. Choice C is incorrect as nursing care plans are utilized by all members of the nursing team, not exclusive to only nurses. Choice D is incorrect as nursing assistants also utilize nursing care plans to provide patient care effectively.

5. Which of the following statements best describes substance P?

A. Substance P decreases a client's sensitivity to pain
B. Substance P levels are drawn before administration of narcotic analgesics
C. Substance P is found in the brain and is responsible for pain control and management of depression
D. Substance P is found in the dorsal horn of the spinal column

Correct answer: D

Rationale: Substance P is a neurotransmitter found in the brain and the dorsal horn of the spinal column, not just in the brain. It is associated with pain transmission and modulation. Substance P is known to cause inflammation, edema, and pain. While it plays a role in pain perception, it does not decrease a client's sensitivity to pain (Choice A), nor are its levels typically drawn before administering narcotic analgesics (Choice B). Although substance P is involved in pain control, it is not responsible for managing depression (Choice C). Therefore, the correct statement is that substance P is found in the dorsal horn of the spinal column.