page_title: Nephrostomy
section_title: Process
hierarchical_section_title: Nephrostomy / Process
caption_attribution_description: English: Various settings of a 6 French pigtail catheter with locking string, obturator (also called stiffening cannula) and puncture needle. A. Overview B. Both puncture needle and obturator engaged, allowing for direct insertion. C. Puncture needle retracted. Obturator engaged. Used for example in steady advancement of the catheter on a guidewire.D. Both obturator and puncture needle retracted, when the catheter is in place. E. Locking string is pulled (bottom center) and then wrapped and attach to the superficial end of the catheter.
context_page_description: A nephrostomy is an artificial opening created between the kidney and the skin which allows for the urinary diversion directly from the upper part of the urinary system.
  An urostomy is a related procedure performed more distally along the urinary system to provide urinary diversion.
context_section_description: Nephrostomies are created by surgeons or interventional radiologists and typically consist of a catheter which pierces the skin and rests in the urinary tract. It is performed under ultrasound guidance, CT fluoroscopy or under image intensifier. Local anesthetic infiltration is used to numb the area where the needle would pass through to make the puncture on the kidney.
  Newer technologies such as 3D fluoroscopy are being developed to aid in placement of these types of drainage tubes.
  Urine is collected in an external bag which can be emptied as often as necessary.
caption: Various settings of a 6 French pigtail catheter with locking string, obturator (also called stiffening cannula) and puncture needle. 
  A. Overview 
  B. Both puncture needle and obturator engaged, allowing for direct insertion. 
  C. Puncture needle retracted. Obturator engaged. Used for example in steady advancement of the catheter on a guidewire previously inserted into the renal pelvis through a thin needle.
  D. Both obturator and puncture needle retracted, when the catheter is in the renal pelvis. 
  E. Locking string is pulled (bottom center) and then wrapped and attach to the superficial end of the catheter.
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