incision nephrectomy transplantation conduits aortic microvascular employing renal rat recipient anastomosis abdominal dissection urinary abdomen badri vascular tortuous figure1 superficial laser holmium rirs pcnl treatment mini kidney stone urology bladder ureteroscopy micro laparoscopic kidney surgery placement tubal ligation fallopian incision weight kidney laparoscopic pain cauterized falope abdominal