Correct Answer: B

Rationale: Bowel inflammation can reduce the absorption of oral medications, leading to decreased effectiveness. In this case, the decrease in the effectiveness of the arthritis medication could be attributed to impaired absorption due to bowel inflammation. Choices A, C, and D are incorrect because increased activity level, long-term use of the medication, and history of dehydration are not directly associated with a decrease in medication effectiveness related to absorption issues.

Correct Answer: B

Rationale: The correct answer is B: Increased hematocrit. Increased hematocrit indicates hemoconcentration, which is a sign of fluid volume deficit. When there is a decrease in fluid volume in the body, the blood becomes more concentrated, leading to an increase in hematocrit levels. Choices A, C, and D are incorrect because decreased BUN levels, increased white blood cell count, and decreased hematocrit are not indicative of fluid volume deficit.

Correct Answer: C

Rationale: Clients with dysphagia have difficulty swallowing, so providing medications through a straw can help control the flow and prevent aspiration. Offering medications with a full glass of water (Choice A) may increase the risk of aspiration. Crushing medications and mixing them together (Choice B) can alter the medication's effectiveness or cause adverse effects. Mixing medications with applesauce (Choice D) may also present a choking hazard for clients with dysphagia.

Correct Answer: B

Rationale: The correct answer is to 'Use sequential compression devices.' Sequential compression devices help prevent DVT by promoting venous return, reducing stasis in the veins, and preventing blood clot formation. Resting in bed for long periods (Choice A) can actually increase the risk of DVT due to decreased mobility. Avoiding leg exercises (Choice C) is also not recommended as mobilization and exercises can help prevent blood clots. Keeping legs crossed (Choice D) can impede blood flow and is not advisable in reducing the risk of DVT.

Correct Answer: A

Rationale: Corrected Rationale: The nurse should instruct the client to use pursed-lip breathing during activities to help improve oxygenation. Pursed-lip breathing can keep the airways open longer, facilitating better oxygen exchange and making it easier to exhale carbon dioxide. Choice B is incorrect as physical activity, within the client's limitations, is beneficial for maintaining overall health. Choice C is incorrect as weight-bearing exercises are important for bone health but not directly related to improving oxygenation in COPD. Choice D is incorrect as using a humidifier while sleeping can help with moisture in the airways but does not directly impact oxygenation in COPD.