<s>[INST] i am a 425pound male whith kidney stone12mm loged on the left upper side. right know i have a folic tube out of my left kidney for drainage.the doctors do not have an intrument long enough ot get to the stone.anistitheologist says it is hi risk to lay me on my stomach.also the surgery tables are rated by weight [/INST] Good Day ! You have several options. You can have it removed via a flexible ureteroscopy and laser which is inserted via the penis. Another option would be gone to a medical center that can do PCNL on a supine or lateral oblique position. I am sure there are centers who are equipped with long PCNL instruments for obese patients. I hope I have succeeded in providing the information you were looking for. Please feel free to write back to me for any further clarifications at: http://www.ChatDoctor .com/doctors/ Chat Doctor.  Best wishes.  Manuel C. See IV, M.D. DBU FPGA </s>