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ORIGINAL ARTICLE
Year : 2017  |  Volume : 33  |  Issue : 4  |  Page : 319-322

Mini access guide to simplify calyceal access during percutaneous nephrolithotomy: A novel device


1 Department of Urology, KPC Medical College, Kolkata, West Bengal, India
2 Department of Pathology, KPC Medical College, Kolkata, West Bengal, India
3 Department of Urology, AIIMS, Bhubaneshwar, Odisha, India

Correspondence Address:
Puskar Shyam Chowdhury
Department of Urology, KPC Medical College, Kolkata, West Bengal
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/iju.IJU_404_16

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Introduction: A precise puncture of the renal collecting system is the most essential step for percutaneous nephrolithotomy (PCNL). There are many techniques describing this crucial first step in PCNL including the bull's eye technique, triangulation technique, free-hand technique, and gradual descensus technique. We describe a novel puncture guide to assist accurate percutaneous needle placement during bull's eye technique. Methods: The mini access guide (MAG) stabilizes the initial puncture needle by mounting it on an adjustable multidirectional carrier fixed to the patient's skin, which aids in achieving the “bull's eye” puncture. It also avoids a direct fluoroscopic exposure of the urologist's hand during the puncture. Sixty consecutive patients with solitary renal calculus were randomized to traditional hand versus MAG puncture during bull's eye technique of puncture and the fluoroscopy time was assessed. Results: The median fluoroscopy screening time for traditional free-hand bull's eye and MAG-guided bull's eye puncture (fluoroscopic screening time for puncture) was 55 versus 21 s (P = 0.001) and the median time to puncture was 80 versus 55 s (P = 0.052), respectively. Novice residents also learned puncture technique faster with MAG on simulator. Conclusion: The MAG is a simple, portable, cheap, and novel assistant to achieve successful PCNL puncture. It would be of great help for novices to establish access during their learning phase of PCNL. It would also be an asset toward significantly decreasing the radiation dose during PCNL access.


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