Correct Answer: C

Rationale: The correct answer is C: Rehabilitation and prevention of further deterioration. Tertiary prevention in mental health aims to provide interventions and support to individuals who already have a mental illness to prevent further deterioration and promote recovery. Choice A, identifying early signs of mental illness, is more aligned with primary prevention which focuses on preventing the onset of mental health problems. Choice B, preventing the occurrence of mental health problems, pertains to secondary prevention which involves early detection and intervention to prevent the progression of mental health issues. Choice D, providing a safe environment to prevent harm, is important but it is not the primary focus of tertiary prevention which is more centered on rehabilitation and improving the quality of life for individuals with existing mental health conditions.

Correct Answer: D

Rationale: The correct answer is D because metformin should be held before a contrast CT scan to prevent the risk of kidney damage. Choices A, B, and C are all correct statements regarding the preparation and experience of a CT scan with contrast. It is important to fast before the procedure, keep the head still during the scan, and expect a warm sensation when the dye is injected.

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: C

Rationale: The correct answer is C. Warfarin therapy requires regular blood testing to monitor INR levels and ensure therapeutic dosing. Option A is incorrect because acetaminophen can be taken with warfarin. Option B is not specific to warfarin administration. Option D is incorrect as it does not address the key monitoring requirement of blood testing while on warfarin.

Correct Answer: D

Rationale: The correct answer is D: Tachycardia, hypotension, and decreased urine output are classic clinical manifestations of hypovolemic shock. In hypovolemic shock, the body tries to compensate for low blood volume by increasing the heart rate (tachycardia) to maintain cardiac output, leading to hypotension and decreased urine output. Prompt fluid replacement is necessary to restore intravascular volume. Choices A, B, and C are incorrect because they do not represent the typical manifestations of hypovolemic shock.