Correct Answer: C

Rationale: Contact precautions are used for clients with known or suspected infections that are spread by direct or indirect contact. The most important measure for healthcare workers when caring for a client on contact precautions is to wear gloves when providing care. This helps prevent the transmission of infectious agents between the client and the healthcare worker. Removing the protective gown after leaving the client's room, placing the client in a room with negative pressure, and wearing a mask when in the client's room are not specific to contact precautions and may not be necessary for all clients on contact precautions.

Correct Answer: B

Rationale: When a client requests the creation of a living will, the nurse's priority is to evaluate the client's understanding of life-sustaining measures. This involves ensuring that the client comprehends the implications of various life-sustaining interventions and can make informed decisions about their care preferences in the event they are unable to communicate them later. It is crucial for the nurse to assess the client's comprehension to ensure that the living will accurately reflects the client's wishes and values.

Correct Answer: B

Rationale: Thrombophlebitis, which is inflammation of a vein with the formation of a clot, is a contraindication to the use of oral contraceptives due to an increased risk of thromboembolism. Clients with a history of thrombophlebitis or thromboembolic disorders should avoid oral contraceptives to prevent further complications like deep vein thrombosis or pulmonary embolism.

Correct Answer: A

Rationale: When St. John's wort, an herbal supplement, is taken with citalopram, a selective serotonin reuptake inhibitor (SSRI), there is a risk of serotonin syndrome. Serotonin syndrome is a serious condition that can occur when there is an excess of serotonin in the body, leading to symptoms such as confusion, hallucinations, rapid heart rate, increased body temperature, and more. Monitoring for serotonin syndrome is crucial when these substances are taken together to prevent any potential harm to the client.

Correct Answer: B

Rationale: Dyspnea is a key finding indicating fluid overload in a client receiving packed RBCs. Fluid overload can lead to pulmonary edema, causing difficulty breathing or shortness of breath (dyspnea). Low back pain is not typically associated with fluid overload but can be more related to musculoskeletal issues. Hypotension and thready pulse are more indicative of hypovolemia (low fluid volume), not fluid overload.