The nurse is conducting a physical assessment on a client with infective endocarditis (IE). The nurse observes flat, reddened, non-tender maculae on the hands and feet.

What does the nurse understand these to be?

Choice A rationale
Low urine osmolarity and creatinine clearance are not the primary indicators of inadequate renal perfusion in a patient being stabilized after an acute coronary syndrome. These measures reflect the concentration of the urine and the kidney’s ability to filter waste from the blood, respectively. While they can be affected by renal perfusion, they are not the most direct or reliable indicators.
Choice B rationale
A decreasing serum blood urea nitrogen (BUN) level is not typically associated with inadequate renal perfusion. In fact, a high BUN level may indicate that the kidneys aren’t working properly. However, BUN levels can be influenced by many factors, including protein intake and liver function, so they are not the most reliable indicator of renal perfusion.
Choice C rationale
A urine output of less than 30 mL/hr is a common sign of inadequate renal perfusion. The kidneys need adequate blood flow to filter waste products from the blood and produce urine. If renal perfusion is inadequate, urine output can decrease.
Choice D rationale
A urine-specific gravity of less than 1.010 is not typically associated with inadequate renal perfusion. Specific gravity is a measure of the concentration of solutes in the urine. It can be influenced by hydration status and certain kidney disorders, but it is not a direct measure of renal perfusion.

Choice A rationale
The diaphragm is not typically the location of a coarctation of the aorta. The diaphragm is a muscle that helps with breathing and separates the chest cavity from the abdominal cavity.
Choice B rationale
The bifurcation into the common iliac arteries is not typically the location of a coarctation of the aorta. The common iliac arteries are located in the lower part of the aorta and supply blood to the pelvis and legs.
Choice C rationale
The aortic valve is not typically the location of a coarctation of the aorta. The aortic valve is located between the left ventricle of the heart and the aorta.
Choice D rationale
The ductus arteriosus is the correct answer. Coarctation of the aorta often occurs near the ductus arteriosus, a blood vessel that connects the left pulmonary artery to the aorta.