three mini figure toys arround very small kidney stones top view

ammonium announce biology block blue businessman calculi caliceal care chemical clogged dialysis disease disorder doctor eswl explain failure figure figurine filter health healthcare information internal kidney laser lithotripsy lithotripter macro magnesium medical medicine mini pain painful phosphate photo presentation problem renal ruler science sharp small specialist stone struvite surgery toys treatment ureter ureterolithiasis urethra urinary urologist waste worker