Modified Sharp Purser Test (MPT) is a simple, non-invasive, point-of-care test used to evaluate nephrolithiasis or kidney stones. It utilizes urinalysis and calculation of the concentrations of calcium, magnesium, and oxalic acid in the patient's urine sample to generate a score that can accurately predict the presence or absence of kidney stones. The MPT is fast and easy to administer, and does not require the use of any special