A nurse is caring for a client with sickle cell disease. Which clinical finding indicates a vaso-occlusive crisis?

Rationale:

A. In end-stage renal disease (ESRD), the kidneys lose the ability to produce sufficient erythropoietin (EPO), a hormone that stimulates the bone marrow to produce red blood cells. Without adequate EPO, erythropoiesis is impaired, leading to a reduced number of circulating red blood cells and anemia. This anemia is typically normocytic and normochromic, meaning the red blood cells are of normal size and color but decreased in number.

B. ESRD does not reduce red blood cell destruction. In fact, uremic toxins in ESRD may actually shorten the lifespan of red blood cells, contributing further to anemia rather than preventing it.

C. Increased erythropoietin production is incorrect. In ESRD, erythropoietin production is diminished, not increased. The lack of EPO is the primary reason for decreased red blood cell production in these patients.

D. Elevated hemoglobin levels is incorrect. Hemoglobin levels are typically decreased in ESRD due to the reduced erythropoiesis and shortened red blood cell lifespan. Elevated hemoglobin is not a feature of anemia associated with kidney disease.

Rationale:

A. The client has renal failure is incorrect. In renal failure, the kidneys often lose the ability to concentrate urine, which usually results in low or fixed specific gravity, not high. A high specific gravity is not a direct indicator of renal failure.

B. The urine is dilute due to hydration is incorrect. Dilute urine corresponds to low specific gravity, which occurs when a client is well-hydrated or when the kidneys are excreting large volumes of water. High specific gravity indicates the opposite.

C. The client has well-controlled diabetes is incorrect. While diabetes mellitus can cause glucosuria in uncontrolled cases, which may slightly increase urine specific gravity, well-controlled diabetes does not typically produce a high specific gravity.

D. The urine is highly concentrated is correct. A high urine specific gravity reflects a high solute concentration relative to water, indicating concentrated urine. This can result from dehydration, reduced fluid intake, excessive loss of water (e.g., vomiting, diarrhea, sweating), or conditions that promote water reabsorption such as elevated antidiuretic hormone (ADH) activity. Measuring specific gravity is a useful indicator of the kidney’s concentrating ability and the client’s hydration status.