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Laser-guided percutaneous kidney access with the Uro Dyna-CT: first experience of three-dimensional puncture planning with an ex vivo model

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Abstract

Background and purpose

Safe and successful puncture of the kidney’s collecting system is essential for acute therapy of hydronephrosis or as part of percutaneous nephrolithotomy. The procedure is technically challenging and might lead to major complications. We describe the feasibility of a laser guidance system and three-dimensional puncture planning in the endourological operation room.

Materials and methods

An Uro Dyna-CT of the biological model was performed with the Artis Zee® Ceiling (Siemens Medical Solutions, Erlangen, Germany) to gain multiplanar reconstructions. 10 punctures were performed with the syngo iGuide® laser guidance system. Puncture success was depicted with antegrade contrast filling of the collecting system and fluoroscopic control. Puncture time, tract length, and fluoroscopy time was documented.

Results

Data acquisition (8 s) and 3D rendering (48 s) was possible in approximately 1 min. Median time for planning the punctures was 7 [5–15] min. Median puncture time was 4.6 [2–10.2] min. Median tract length was 4.96 [4.33–6.5] cm. Median fluoroscopy time was 0.4 [0.2–1] min. 9 of 10 punctures were successful. A second puncture was needed to gain access to the collecting system in one case, and one puncture was broken up.

Conclusion

The tested laser guidance system was feasible to perform successful percutaneous punctures of the kidney in this ex vivo study. Handling was intuitive and time within acceptable limits. Due to the requirement of multiplanar reconstructions with higher radiation exposure to the patient than with standard fluoroscopy, this technique should be limited to complex cases.

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Conflict of interest

For the development of the endourological intervention table, a cooperation contract exists with Siemens Health Care Solutions.

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Authors and Affiliations

  1. Department of Urology, Medical Centre Mannheim, Heidelberg University, Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Germany

    M. Ritter, M.-C. Rassweiler, A. Häcker & M. S. Michel

Authors
  1. M. Ritter
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  2. M.-C. Rassweiler
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  3. A. Häcker
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  4. M. S. Michel
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Corresponding author

Correspondence to M. Ritter.

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Ritter, M., Rassweiler, MC., Häcker, A. et al. Laser-guided percutaneous kidney access with the Uro Dyna-CT: first experience of three-dimensional puncture planning with an ex vivo model. World J Urol 31, 1147–1151 (2013). https://doi.org/10.1007/s00345-012-0847-8

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  • DOI: https://doi.org/10.1007/s00345-012-0847-8

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