Treatments for kidney stones which refuse to pass can usually done with either traditional lithotripsy (ultrasound shock waves are aimed at the stone to shatter it into smaller pieces which can then be passed),
laser lithotripsy (a scope with a
laser is passed up the ureter and aimed at the
stone to shatter it directly), or in very severe cases, a procedure called PNY (percutaneous nephrolithotomy) in which a surgeon enters your kidney directly through an incision made in your back to manually