A client with cirrhosis is admitted with hematemesis and tachycardia. The nurse suspects variceal bleeding. Which action should the nurse take first?

Choice A reason: A raised red rash around the fistula site may indicate infection or skin irritation, not venous insufficiency. Venous insufficiency involves impaired venous return, causing edema or stasis, not localized rashes. Infections require antibiotics, but coldness and numbness distal to the fistula suggest vascular compromise, a hallmark of venous or arterial issues.

Choice B reason: Cold and numb sensation distal to the fistula site indicates possible venous insufficiency or steal syndrome, where the fistula diverts blood flow, reducing distal perfusion. This causes ischemia, leading to coolness and sensory loss. Teaching this manifestation ensures early detection of vascular complications, critical for preserving fistula function and limb viability.

Choice C reason: Foul-smelling drainage suggests infection at the fistula site, a serious complication requiring immediate intervention. It is not related to venous insufficiency, which involves impaired venous return, not purulent discharge. Infections are caused by bacterial invasion, not vascular flow issues, making this an incorrect sign for venous insufficiency teaching.

Choice D reason: Pain proximal to the fistula site may indicate inflammation or thrombosis but is not specific to venous insufficiency. Venous insufficiency typically causes distal symptoms like edema or numbness due to poor venous return. Pain above the fistula is less likely to reflect venous flow issues, making it less relevant for this teaching.

Choice A reason: Polyuria, excessive urine output, typically leads to potassium loss, causing hypokalemia, not hyperkalemia. In conditions like diabetes insipidus, increased urination reduces serum potassium as the kidneys excrete more fluid and electrolytes. Elevated potassium is more associated with reduced renal excretion, as in kidney failure, not polyuria.

Choice B reason: Creatinine levels increase in acute kidney injury due to reduced glomerular filtration, impairing the kidneys’ ability to clear creatinine, a muscle metabolism byproduct. Decreased creatinine levels are rare and may reflect low muscle mass, not kidney injury, making this statement incorrect as it contradicts the pathophysiology of renal impairment.

Choice C reason: Specific gravity is increased in hypovolemia, as the kidneys conserve water, producing concentrated urine (high specific gravity, >1.020). Decreased specific gravity occurs in conditions like diabetes insipidus, where dilute urine is produced. This statement is incorrect, as hypovolemia leads to higher, not lower, urine specific gravity.

Choice D reason: Blood urea nitrogen (BUN) increases in dehydration due to reduced renal perfusion, causing the kidneys to reabsorb urea to conserve water. This elevates serum BUN levels, often with a normal creatinine, reflecting prerenal azotemia. This statement correctly aligns with the pathophysiology of dehydration’s effect on renal laboratory values.