The use of differential pressure as an inferred measurement of a liquid's rate of flow is well known. Differential pressure flowmeters are, by far, the most common units in use today. Estimates are that over 50 percent of all liquid flow measurement applications use this type of unit.
Between 1% and 15% of people globally are affected by kidney stones at some point in their life. In 2013, 49 million cases of occurred, resulting in about 15,000 deaths. They have become more common in the Western world since the 1970s. Generally, more men are affected than women.
What is polycystic kidney disease? Polycystic kidney disease (PKD) is the number four cause of kidney failure in Americans, and an estimated 600,000 people in the United States currently have it. About half of the people diagnosed with PKD will experience end stage renal disease (ESRD) and will need dialysis or a kidney transplant.