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.
Kidney stones, also called urolithiasis, are a common pathology affecting about 10% of the population in developed countries at least once in an individualâs lifetime. Recent trends show an increase in stone prevalence. The role of dietary habits, including fluid intake, has a great implication in stone development.