Correct Answer: C

Rationale: After administering a subcutaneous injection of enoxaparin (Lovenox) into the abdomen, the nurse should remove the needle and engage the needle safety device. Rubbing the injection site after the needle is withdrawn is not recommended as it may cause irritation and bruising. Having the client maintain a side-lying position for at least five minutes is unnecessary for a subcutaneous injection into the abdomen. Applying heat to the injection site is not indicated after administering enoxaparin subcutaneously; it could increase the risk of bleeding or bruising at the injection site.

Correct Answer: B

Rationale: A family history of colon polyps and/or colon cancer is a significant risk factor for developing colon cancer. Individuals with a family history are more likely to develop colon cancer due to genetic predisposition. While other factors like irritable bowel syndrome, cirrhosis of the liver, and history of colon surgery may contribute to an increased risk of colon cancer, having a family history of colon polyps is the highest risk factor. Irritable bowel syndrome does not directly increase the risk of colon cancer. Cirrhosis of the liver is associated with liver cancer rather than colon cancer. A history of colon surgery may reduce the risk of colon cancer in some cases by removing precancerous polyps.

Correct Answer: B

Rationale: The correct answer is 'Has a cardiac pacemaker.' If a client with a cardiac pacemaker undergoes an MRI, the magnetic field can interfere with the pacemaker's function, leading to serious complications or even death. It is crucial to ensure that the pacemaker is compatible with MRI imaging or to consider alternative imaging modalities. The other choices, such as 'Allergy to shellfish,' 'A diabetic,' and 'No IV access,' are not direct contraindications for an MRI scan and do not pose the same level of risk as having a cardiac pacemaker.

Correct Answer: D

Rationale: The correct answer is the client admitted with alcohol abuse. Alcoholics tend to have poor nutrition due to decreased food intake, which is a common source of magnesium. Additionally, alcohol suppresses the release of ADH, leading to diuresis and magnesium loss. Choice A is incorrect because a history of heart disease does not directly increase the risk of hypomagnesemia. Choice B is incorrect as taking magnesium-based antacids would not put the client at risk for hypomagnesemia; in fact, it would help prevent it. Choice C is also incorrect as a parathyroid disorder is not typically associated with an increased risk of hypomagnesemia.

Correct Answer: C

Rationale: Correct! When assessing clients with implanted dialysis access devices, it is crucial to palpate for the thrill, which indicates blood flow, and auscultate for the bruit, a humming sound, to ensure the patency of the access device. Choices A, B, and D are incorrect as they are not specific assessments related to dialysis access devices. Checking color and capillary refill, pulse, Trousseau's sign, and temperature are important assessments in other contexts but not specifically for monitoring implanted dialysis access devices.