2. The Role of Kidneys: The Unsung Heroes of Filtration
Kidneys are the unsung heroes in the narrative of proteinuria. They work tirelessly, filtering about 120 to 150 quarts of blood every single day. They remove waste, control bodily fluid balance, and keep electrolytes in check. However, when we talk about proteinuria, we essentially spotlight their rare moment of inefficiency.
Unlike other organs, kidneys prefer a low-profile, efficient operation. Proteins in the blood should technically never make their way into the urine under normal kidney function. The renal system acts like a tightly regulated gateway, ensuring proteins circulate back into the bloodstream after filtration.
Yet, proteinuria happens, and it poses a conundrum. Why would an organ as efficient as the kidney falter? Proteinuria serves as a glaring sign that, despite their efficiency, kidneys are not immune to malfunction. In some cases, proteinuria is the only prominent clue hinting at decreased kidney function.(2)
