Correct Answer: B

Rationale: Tuberculosis is spread through small droplets, measuring less than 5 microns, which can remain airborne for extended periods. The nurse should place a client with TB under airborne precautions to prevent the transmission of the disease. Choice A, contact precautions, are used for diseases that spread by direct or indirect contact. Choice C, droplet precautions, are for diseases transmitted by large droplets. Choice D, protective environment, is used for clients who have compromised immune systems.

Correct Answer: A

Rationale: A distended, board-like abdomen is a concerning sign indicating the possibility of a ruptured appendix and peritonitis, which are medical emergencies. Reporting this finding immediately is crucial for prompt intervention. Choice B, an elevated WBC count, could indicate infection but is not as urgent as the risk of a ruptured appendix. Choice C, rebound tenderness over McBurney's point, is a classic sign of appendicitis but does not indicate an immediate threat like a possible rupture. Choice D, a slightly elevated temperature, is a nonspecific finding and not as critical as the risk of peritonitis associated with a distended, board-like abdomen.

Correct Answer: B

Rationale: The correct answer is B. The circumference of the upper arm above the insertion site of the PICC should be measured at the time of insertion and then again during assessments. An increase in circumference could indicate deep vein thrombosis, which could be life-threatening. Choice A is not a concern as changing the dressing 7 days ago is within the recommended timeframe. Choice C is not alarming as the catheter not being used for 8 hours does not necessarily indicate a problem. Choice D indicates proper catheter care by flushing it with sterile saline after medication use, so it does not require provider notification.

Correct Answer: D

Rationale: The priority action is to verify the prescription with the provider. Verifying the prescription ensures patient safety by preventing fluid volume overload and dysrhythmias, which can result from infusing potassium too rapidly. Teaching the client about IV extravasation, evaluating IV patency, and consulting with the pharmacist are important but should come after verifying the prescription to ensure the ordered treatment is appropriate and safe for the client's condition.

Correct Answer: D

Rationale: The correct answer is D. The nurse should instruct the client to avoid corticosteroids and vitamin C prior to testing to prevent false-positive results. Choice A is incorrect because stool samples from bowel movements, not from digital rectal examinations, are used for FOBT. Choice B is incorrect because a stimulant laxative is not typically prescribed before FOBT; rather, the client is instructed to follow specific dietary restrictions. Choice C is incorrect because biennial fecal occult blood testing for colorectal cancer screening usually begins at 50 years old, not 40.