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3d staghorn calculi

Adam Golab, Tomasz Smektala, Marcin Krolikowski, Marcin Slojewski
Percutaneous nephrolithotomy (PNL) is an endoscopic technique used for treating large stones, multiple stones, and staghorn calculi. Although minimally invasive, complication rate of PNL reaches 25%, and it is partially associated with needle puncture during nephrostomy tract preparation. Continuous improvement of armamentarium and imaging methods and the introduction of three-dimensional (3D) visualizations optimize the procedure; however, the rapid and precise establishment of the nephrostomy tract is still difficult...
May 13, 2016: Urologia Internationalis
William Finch, Richard Johnston, Nadeem Shaida, Andrew Winterbottom, Oliver Wiseman
OBJECTIVES: To determine the optimal method for assessing stone volume, and thus stone burden, by comparing the accuracy of scalene, oblate, and prolate ellipsoid volume equations with three-dimensional (3D)-reconstructed stone volume. Kidney stone volume may be helpful in predicting treatment outcome for renal stones. While the precise measurement of stone volume by 3D reconstruction can be accomplished using modern computer tomography (CT) scanning software, this technique is not available in all hospitals or with routine acute colic scanning protocols...
April 2014: BJU International
Hulin Li, Yuanbo Chen, Chunxiao Liu, Bingkun Li, Kai Xu, Susu Bao
OBJECTIVES: To construct a three-dimensional (3D) model of renal stones to facilitate comprehensive planning for percutaneous nephrolithotomy (PCNL) and to assist in surgery. METHODS: Fifteen patients with complex renal stones, including one patient with a horseshoe kidney, eight patients with partial/complete staghorn, and six patients with multiple renal stones, participated in our study. Computed tomography images of the unenhanced, arterial, venous, and excretory phases were obtained before surgery...
December 2013: World Journal of Urology
Li-Ming Su, Balazs P Vagvolgyi, Rahul Agarwal, Carol E Reiley, Russell H Taylor, Gregory D Hager
OBJECTIVES: To investigate a markerless tracking system for real-time stereo-endoscopic visualization of preoperative computed tomographic imaging as an augmented display during robot-assisted laparoscopic partial nephrectomy. METHODS: Stereoscopic video segments of a patient undergoing robot-assisted laparoscopic partial nephrectomy for tumor and another for a partial staghorn renal calculus were processed to evaluate the performance of a three-dimensional (3D)-to-3D registration algorithm...
April 2009: Urology
Nikesh Thiruchelvam, Hugh Mostafid, Gaurang Ubhayakar
OBJECTIVE: To assess a modified technique of multidetector computed tomographic urography (CTU) which can reproducibly and accurately map the pelvicalyceal system (PCS) and complex renal calculi, as such information is essential in choosing the optimal percutaneous approach into the PCS for safe and successful percutaneous nephrolithotomy (PCNL). PATIENTS AND METHODS: Ten consecutive patients with renal calculi underwent a modified four-detector multislice CTU with frusemide, abdominal compression and subsequent injection with contrast medium...
June 2005: BJU International
N P Buchholz
A three-dimensional spiral CT (3D CT) reconstruction of staghorn stones provides a precise picture of its extent and branching within the kidney. The author reports a case of a large renal staghorn stone in a morbidly obese woman, further complicated by malrotation and hypermobility of the kidney. Two-dimensional plain CT was unable to provide sufficient information for a safe percutaneous approach. This was achieved by means of 3D CT, which also was very helpful during the procedure. Although 3D CT should by no means be routinely employed, it is a valuable tool for pretreatment decision-making and intraoperative orientation in selected cases...
2000: Urologia Internationalis
J Hubert, A Blum, L Cormier, M Claudon, D Regent, P Mangin
OBJECTIVES: The development of CT scanners (CT scan) with continuous rapid spiral acquisition now allows three-dimensional reconstructions of mobile organs such as kidneys. The aim of this study was to appreciate the merits of this new technique in the field of renal lithiasis. METHOD: This non-invasive technique was applied in 27 renal calculi (23 staghorn and 4 radiolucent stones). The acquisition does not require any injection of contrast material. Reconstruction was carried out by three-dimensional (3D) shaded surface display...
1997: European Urology
J Hubert, A Blum, S Chassagne, L Cormier, J Zemrag, M Claudon, D Regent, P Mangin
The development of helicoidal CT acquisition allows 3D reconstruction of vessels, cavities or parenchyma of mobile organs such as the kidney. The value of this 3D surface reconstruction was investigated in various areas of urology: congenital malformations (horseshoe kidney, megaureter, ectopic organs), acquired malformations (diverticulum, trabeculated bladder), renal stones, particularly staghorn calculi, and renal transplantation. The fields of interest of 3D CT scans are still poorly defined, but are probably threefold: diagnostic, therapeutic and for teaching purposes...
December 1994: Progr├Ęs en Urologie
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