Correct Answer: A

Rationale: Generalized petechiae and ecchymoses can indicate a potential issue with platelet function or count. Therefore, the most relevant laboratory test to evaluate this condition would be a platelet count. Platelet count helps assess the number of platelets in the blood, which are crucial for clotting and preventing bleeding. Monitoring platelet levels can provide important information about a client's bleeding risk and overall hematologic health.

Correct Answer: C

Rationale: Monitoring the digoxin level is crucial as it helps determine the drug's effectiveness and potential toxicity. A digoxin level of 1 ng/mL is within the therapeutic range. However, levels above this range can lead to toxicity, causing adverse effects like nausea, vomiting, visual disturbances, and dysrhythmias. Therefore, the nurse should report a digoxin level of 1 ng/mL to the provider for further evaluation and potential dose adjustment.

Correct Answer: A

Rationale: Substernal retractions are a concerning sign of respiratory distress and can indicate acute chest syndrome, a severe complication of sickle-cell anemia. It results from vaso-occlusion in the pulmonary vasculature, leading to impaired oxygenation. Prompt reporting of this symptom is crucial for early intervention to prevent further complications. Hematuria, a high temperature, and sneezing are not specific manifestations of acute chest syndrome and would not warrant immediate notification to the provider in this context.

Correct Answer: B

Rationale: When caring for a client with a newly applied cast, the nurse's priority should be to assess the circulation by palpating the pulse distal to the cast. This is crucial to ensure there is no compromise in blood flow, which could lead to serious complications. Placing an ice pack over the cast, teaching the client about cast care, and positioning the casted extremity on a pillow are important interventions but should follow the assessment of circulation.

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.