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  • 2493
  • 2017-09-11

Percutaneous nephrolithotomy

Epublication WebSurg.com, Sep 2017;17(09). URL:
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This is the case of a 60-year-old man with a large left kidney stone (>3cm) taking up the entire renal pelvis and lower calyceal cavities. Under general anesthesia, the patient is placed in a supine modified lithotomy position, with a 3L water bag underneath the left lumbar fossa to raise it. The left leg is straight whereas the right leg is put on a leg brace flexed. A cystoscopy is performed in order to identify the left ureteral orifice and introduce a 7 French beveled ureteral stent. This stent is connected to a Foley catheter. A contrast agent is injected into the ureteral stent. The kidney’s lower pole is punctured with an 18 Gauge hypodermic needle, making sure to stay in contact with the stone. A rigid Lunderquist® guidewire is passed into the needle. The pathway is dilated using metallic coaxial dilators and with a dilation balloon until an Amplatz® renal sheath is placed. The sheath will then be extended. A nephroscopy is performed to identify the stone, fragment and aspirate it partially with the LithoClast Master® intracorporeal lithotripter. Some large fragments will be withdrawn with crocodile forceps. The lithotripter system fails to remove the residual stone. A Malecot®-type nephrostomy tube is used and the ureteral stent is replaced by means of a double J catheter.