Minimally invasive percutaneous nephrolithotomy improves stone-free rates for impacted proximal ureteral stones: A systematic review and meta-analysis.

Background: Urinary stones are common medical disorders and the treatment of impacted proximal ureteral stones (IPUS) is still a challenge for urologists. The aim of this study was to compare the efficacy and safety of minimally invasive percutaneous nephrolithotomy (MI-PCNL) and ureteroscopic lithotripsy (URL) in the treatment of IPUS via a meta-analysis.

Methods: We collected studies using PubMed, Embase, and Cochrane Library from 1978 to November 2016 and analyzed them using Stata 12.

The Value of Contrast-Enhanced Ultrasonography and Contrast-Enhanced CT in the Diagnosis of Malignant Renal Cystic Lesions: A Meta-Analysis.

We compared the efficacy of contrast-enhanced ultrasound (CEUS) and contrast-enhanced computed tomography (CECT) for the diagnosis of renal cystic lesions via a meta-analysis to determine the value of CEUS in the prediction of the malignant potential of complex renal cysts. Eleven studies were evaluated: 4 control studies related to CEUS and CECT, 3 studies related to CEUS and 4 studies related to CECT. According to the random effects model, the pooled sensitivity, specificity, positive likelihood ratio, and negative likelihood ratio for CEUS/CECT were 0.

Wavefront aberration compensation of projection lens using clocking lens elements.

For extremely high-performance lithographic lenses, the edge level accuracy of the manufacturing process and multicompensation strategies must be applied. Element clocking can be effectively used to compensate for the low-order figure errors of the elements. Considering that commercial optical software is usually incapable of obtaining good convergence for clocking optimization, this paper proposes a mathematical model of a lithographic lens containing the errors of a surface figure, after which a clocking optimization algorithm is programmed.

Role of the CASP-9 Ex5+32 G>A polymorphism in susceptibility to cancer: A meta-analysis.

Failure of apoptosis is one of the hallmarks of cancer. As an execution-phase caspase, caspase-9 plays a crucial role during apoptosis. To examine whether the Ex5+32 G>A (rs1052576) polymorphism in the CASP-9 gene alters cancer risk, we conducted a comprehensive meta-analysis of 7 case-control studies consisting of a total of 1668 cancer cases and 2294 healthy controls.

[Greenlight photoselective vaporization prostatectomy versus thulium laser vaporesection of the prostate for aged high-risk BPH patients with the prostate heavier than 80 g].

Objective: To compare the effects of greenlight photoselective vaporization prostatectomy (PVP) and thulium laser vaporesection of the prostate (TmLRP) in the treatment of aged high-risk BPH patients with the prostate weighing > 80 g.

Methods: We included in this study 118 high-risk BPH patients aged 62-96 (mean 76) years with the prostate heavier than 80 g, 82 treated by PVP and the other 36 by TmLRP. Then we compared the operation time, intraoperative bleeding, complications, short-term effectiveness, and surgical cost between the two groups.

[Analysis of influence effect between every two elements of Ni, Cu and Zn in EDXRF and correction method research].

For problems of matrix effect and correction method in EDXRF technique, three kinds of bogus binary system of NiCu, Ni-Zn and Cu-Zn were chosen as research analyte. Firstly, Lachance-Trail algorithm was employed to get binary influence coefficient. Then, experimental measurement was taken to achieve qualitative analysis of binary influence effect, and good coherence was obtained after comparison.