Correct Answer: B

Rationale: The correct answer is to remove a behind-the-ear hearing aid before showering to prevent water damage. Choice A is incorrect because it is safe to wear the hearing aid while sleeping as it does not pose a risk of damage. Choice C is incorrect because it is advisable to remove the hearing aid during certain activities to prevent damage or loss. Choice D is incorrect as hearing aids do not need to be replaced weekly unless there is an issue with the device.

Correct Answer: B

Rationale: The correct answer is B. Potassium levels above 5.0 mEq/L can lead to cardiac issues, and a level of 6.5 mEq/L requires immediate intervention. Hyperkalemia can cause life-threatening cardiac arrhythmias. Choices A, C, and D are within normal ranges and do not require immediate intervention in the context of hemodialysis monitoring.

Correct Answer: B

Rationale: Verifying the patient's identity before administration is a critical step to ensure that the correct blood product is given to the right patient, thereby preventing transfusion errors. While ensuring proper documentation of the transfusion (choice A) is important for record-keeping, verifying patient identity (choice B) directly addresses the risk of administering blood to the wrong patient. Monitoring for allergic reactions or transfusion reactions (choice C) and monitoring the patient's vital signs during transfusion (choice D) are also essential considerations during blood product administration, but verifying patient identity takes precedence to prevent potentially life-threatening errors.

Correct Answer: B

Rationale: The correct answer is to inject the medication at a 90-degree angle when administering an IM injection into the deltoid muscle. This angle ensures proper delivery of the medication into the muscle tissue. Choice A is incorrect because the gauge of the needle for a deltoid IM injection is usually smaller, around 23-25 gauge. Choices C and D are incorrect as the injection site for the deltoid muscle is approximately 2.54 cm (1 in) below the acromion process, not 12.7 cm (5 in).

Correct Answer: B

Rationale: The correct answer is B. Bruising on the arms and legs is a sign of bleeding, which is a serious complication of heparin therapy and should be reported immediately to the provider. Option A is incorrect as urine output greater than 30 mL/hr is a normal finding. Option C, positive Trousseau's sign, is associated with hypocalcemia, not heparin therapy. Option D, urine output of 60 mL/hr, is within the normal range and does not indicate a complication of heparin therapy.