Correct Answer: A

Rationale: The best way to evaluate the effectiveness of a new fall prevention protocol is by comparing the number of falls that occurred before and after its implementation. This direct comparison helps in assessing the impact of the protocol on reducing fall rates. Choices B, C, and D do not directly measure the effectiveness of the protocol. Analyzing costs incurred (Choice B), conducting a chart review (Choice C), or consulting with a physical therapist (Choice D) may provide valuable information but do not specifically evaluate the protocol's effectiveness in preventing falls.

Correct Answer: C

Rationale: The correct answer is C: Low serum calcium. Hand spasms and paresthesia are indicative of potential hypocalcemia, which is characterized by low serum calcium levels. Elevated serum calcium (Choice A) is not consistent with the symptoms described. Low serum magnesium (Choice B) and elevated serum potassium (Choice D) are not typically associated with hand spasms and paresthesia.

Correct Answer: D

Rationale: The correct answer is D because an illiterate client may require additional support to ensure they fully comprehend the information provided in the informed consent process. It is crucial to confirm that the client truly understands the nature of the procedure, its risks, and benefits. While it is important to assess pain control (choice A), a client's previous medication administration does not directly impact their ability to understand the consent process. Choice B, a 15-year-old primigravida who has been self-supporting, may legally provide informed consent depending on the jurisdiction and circumstances, so this situation may not require further exploration. Choice C, explaining a procedure by a different specialist, does not necessarily require additional exploration before witnessing the client's consent.

Correct Answer: C

Rationale: The correct answer is C: Serum calcium. Numbness and tingling can be indicative of hypocalcemia, which can affect the nervous system. Reviewing serum calcium levels is crucial to address this potential issue. Options A, B, and D are not directly related to the symptoms described by the client and are not typically associated with numbness and tingling around the mouth and fingers. Capillary glucose levels are more relevant in assessing for diabetes or monitoring glucose control. Urine specific gravity is useful in evaluating hydration status. White blood cell count is typically checked to assess infection or immune response, which are not indicated by the client's symptoms of numbness and tingling.

Correct Answer: B

Rationale: The nurse should counsel the client on the importance of notifying partners about HIV status while respecting confidentiality. Mandatory partner notification laws vary by jurisdiction, so option A cannot be universally applied. Breaching patient confidentiality, as suggested in option C, is unethical. Reporting the client's status to the health department without consent, as in option D, is not appropriate as HIV status is confidential information and is not automatically reported as a sexually transmitted case.