Assistance of three-dimensional reconstruction of spiral CT for staghorn calculi in percutaneous nephro-lithotomy
10.3760/cma.j.issn.1000-6702.2009.02.009
- VernacularTitle:螺旋CT三维重建技术在鹿角形肾结石经皮肾镜取石术中的应用价值
- Author:
Bo YANG
;
Jianxing LI
;
Xiaobo HUANG
;
Xiaofeng WANG
- Publication Type:Journal Article
- Keywords:
Tomography,X-ray computed;
Percutaneous nephrolithotomy
- From:
Chinese Journal of Urology
2009;30(2):97-99
- CountryChina
- Language:Chinese
-
Abstract:
Objective To assess the assistance role of three-dimensional reconstruction of stag-horn calculi by 16-slice spiral CT to percutaneous nephrolithotomy (PCNL). Methods A total of 87 patients with 104 staghorn stones underwent 24 F-tract PCNL. 16-slice spiral CT scan and three-di-mensional (3D) reconstruction by volume rendering technique were carried out before PCNL for tract placement planning, the necessity for multiple tracts and stone burden. Tract placement, tract num-ber, operation time, bleeding requiring transfusion and volume of stone cleared were recorded. KUB was taken to explore residual calculi after operation and thus stone free rate was noted. Results In-traoperative tract placement was according to preoperative planning with 3D reconstruction of calculi. Forty-three calculi were cleared by multiple accesses, while multiple accesses were supposed necessary for 47 caculi. The stone free rate of one-session operation was 87.5%, and the last stone free rate af-ter second-look procedure was 91.7%. The stone burden of 3D reconstruction of CT (19.35 ±19.24 cm3) was significantly correlated with the mean volume of cleared calculi (16.34±13.79 cm3) in oper-ation (r=0. 993, P=0. 000). Conclusion The 3D reconstruction of spiral CT for staghorn calculi could show the precise construction of calculi, which could help to plan tract placement, evaluate the necessity of multiple tracts and stone burden.
