ATI Fluid Electrolyte and Acid-Base Regulation

Correct Answer: C

Rationale: The correct answer is C: Metabolic alkalosis. Pyloric stenosis can lead to vomiting, causing loss of gastric acid and chloride ions, leading to metabolic alkalosis. Low potassium levels are common in metabolic alkalosis due to potassium shifting into cells to compensate for the alkalosis. Hypercalcemia (choice A) is not associated with pyloric stenosis. Metabolic acidosis (choice B) typically presents with low pH and bicarbonate levels. Respiratory acidosis (choice D) is caused by impaired gas exchange in the lungs, not related to pyloric stenosis.

Correct Answer: B

Rationale: The correct answer is B: Place warm compresses on the site. Warm compresses can help increase blood flow, reduce pain, and promote healing at the site of inflammation. The warmth can help dilate blood vessels, increasing circulation to the area and promoting the removal of inflammatory substances. This can help alleviate pain and reduce swelling. Administering topical lidocaine (choice A) may not address the underlying cause of pain and redness. Administering oral pain medication (choice C) may be necessary for severe pain but may not directly address the local inflammation. Massaging the site with scented oils (choice D) can potentially introduce more irritants and should be avoided in cases of inflammation.

Correct Answer: D

Rationale: The correct answer is D. A cool lower extremity can indicate impaired circulation due to the intraosseous catheter placement, leading to compartment syndrome or tissue necrosis. This finding requires immediate intervention to prevent serious complications. Choices A, B, and C are incorrect because the duration of catheter placement, poor vascular access, and the specific location of the catheter do not directly impact circulation and tissue perfusion as significantly as a cool lower extremity.

Correct Answer: D

Rationale: Rationale: The correct answer is D. Hydrostatic pressure resulting from the pumping action of the heart causes water and electrolytes to move from the arterial capillary bed to the interstitial fluid. This occurs due to the force exerted by the heart's pumping action, pushing fluid out of the capillaries into the interstitial space. This process is known as filtration and is essential for maintaining fluid balance in the body. Summary of other choices: A: Active transport of hydrogen ions does not directly cause the movement of water and electrolytes between capillaries and interstitial fluid. B: The pressure in renal capillaries specifically relates to the kidneys, not the general movement of water and electrolytes in the body. C: The dissolved particles in blood do not directly contribute to the movement of water and electrolytes between capillaries and interstitial fluid.

Correct Answer: D

Rationale: The correct action is to stop the infusion of intravenous fluids. Edema and tenderness above the IV site suggest infiltration, where fluid leaks into surrounding tissues. Stopping the infusion prevents further damage and helps prevent complications. Applying cold compresses (A) may not address the underlying issue. Elevating the extremity (B) is helpful for other conditions like swelling due to dependent edema, not infiltration. Flushing the catheter (C) can exacerbate the issue by pushing more fluid into the tissue.