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Related Concept Videos

Imaging Studies VII: Vascular Imaging01:19

Imaging Studies VII: Vascular Imaging

DefinitionRenal angiography, also known as renal arteriography, is an imaging technique used to obtain a comprehensive view of blood flow and the vascular structure of blood vessels in the kidneys and surrounding areas.PurposeRenal angiography detects blood vessel abnormalities in the kidneys, such as aneurysms, stenosis, thrombosis, vascular tumors, and renal artery stenosis. It evaluates kidney function and guides interventional treatments like angioplasty or stent placement.Pre-Procedure...
Imaging Studies IV: Magnetic Resonance Imaging01:27

Imaging Studies IV: Magnetic Resonance Imaging

Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...

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Related Experiment Video

Updated: Jun 8, 2026

Remote Magnetic Navigation for Accurate, Real-time Catheter Positioning and Ablation in Cardiac Electrophysiology Procedures
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Multimedia article. Navigated renal access using electromagnetic tracking: an initial experience.

Johannes Huber1, Ingmar Wegner, Hans-Peter Meinzer

  • 1Department of Urology, University of Heidelberg, Im Neuenheimer Feld 110, 69120 Heidelberg, Germany. johannes.huber@med.uni-heidelberg.de

Surgical Endoscopy
|September 14, 2010
PubMed
Summary
This summary is machine-generated.

Electromagnetic tracking (EMT) successfully navigated renal access in a porcine model, achieving a 100% success rate within two punctures. This minimally invasive technique shows promise for improving surgical safety and efficiency.

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Area of Science:

  • Minimally invasive surgery
  • Medical device technology
  • Surgical navigation

Background:

  • Surgical navigation systems enhance efficacy and safety in minimally invasive procedures.
  • Electromagnetic tracking (EMT) is a promising technology for real-time guidance.
  • Renal access is a critical step in various urological interventions.

Purpose of the Study:

  • To investigate the feasibility and efficacy of electromagnetic tracking (EMT) for navigated renal access.
  • To evaluate EMT's performance in a porcine ex vivo model for precision and success rate.
  • To assess the potential of EMT to improve safety and reduce procedural time in renal access.

Main Methods:

  • A porcine ex vivo model was utilized for proof-of-principle study.
  • A sensor was introduced via ureteral catheter and located using EMT.
  • A tracked needle was navigated to the collecting system using a "rendezvous" approach.
  • Ninety renal tracts were created, with attempts, distance, time, and localization recorded.

Main Results:

  • A 100% success rate for renal access was achieved within a maximum of two punctures.
  • Post-learning phase, success rate improved to 96% with shorter puncture times and increased precision.
  • No significant effect of calyx location on success rate was observed (p = 0.637).

Conclusions:

  • EMT significantly decreased the number of attempts and procedural time compared to established techniques.
  • The navigated renal access approach using EMT demonstrates potential for enhanced clinical safety and efficacy.
  • Further in vivo studies are warranted to support the clinical application of this promising technique.