Final answer:
A patient with Stage 5 CKD experiencing extreme pruritus and crystallized white deposits on the skin likely has elevated levels of phosphate in the blood due to impaired kidney function.
Step-by-step explanation:
A patient with Stage 5 Chronic Kidney Disease (CKD) experiencing extreme pruritus and observing crystallized white deposits on the skin is likely encountering these issues due to the accumulation of phosphate in the blood. In CKD, the kidneys are unable to filter out excess phosphate, leading to its build-up and resulting in the visible signs as described.
Furthermore, substances like urea can increase in concentration and lead to renal uremia, another complication associated with kidney disorders. It's important to consider these substances and the effects they have on patients with advanced CKD.