Effect of stone composition,color,size,impaction and location on the efficacy of pneumatic ureterolithotripsy

Objective:Assessment of the relationship between stone location,composition,color,size and impaction with success rate of pneumatic ureterolithotripsy.Methods:This study was performed on 440 patients who were candidate for pneumatic ureterolithotripsy admitted in an academic urology department from February 2004 to June 2006.Exclusion criteria included active urinary tract infection and pregnancy.Information such as stone composition,color,impaction,size,location and surface were recorded.Success rate was defined as stone fragmentation to < 2 mm.We used chi-square test and student t-test for statistical analysis.Results:The success rate of pneumatic ureterolithotripsy was 83.0 %.Mean stone size was 9.86 ± 3.79 mm.The stone free rates in upper,middle and lower ureter were 66.7 %,100 % and 90.7 % respectively(P<0.000 1).Stone free rate was 100 % and 69.35 % in <5 mm and >5 mm stones respectively(P<0.000 1).Impaction did not correlate significantly with stone free rate(P=0.17).The success rate was 100 % in phosphate and cystine stones.There was a significant statistical difference between success rate and stone composition(P=0.026).The most common fragmented stone color was gold(95.5 %).Stone color correlated significantly with stone free rate(P<0.000 1).Conclusion:In this series ureterolithotripsy,stone free rate had a significant correlation with stone color,size,composition and location,but it was independent of stone impaction.

Relationship study between platelet count and stage and grade of renal cell carcinoma in indoor patients

Objective:Thrombocytosis has been reported in many types of malignancies and has been studied as a prognostic factor.The aim of this survey is to investigate the relation between platelet count and stage and grade of tumor in indoor patients with renal cell carcinoma(RCC)in order to evaluate the prognostic value of thrombocytosis.Methods:In a descriptive and retrospective survey 82 patients treated by radical nephrectomy for RCC were enrolled.In all cases TNM stage,Fuhrman grade,invasion and platelet count were recorded and entered in SPSS software for analysis.Results:In this study,76 patients(92.7 %)with normal platelet and 6 patients(7.3 %)with thrombocytosis were studied.In this survey there was no significant correlation between the thrombocytosis and pathological stage in all patients,both genders and various age groups.In addition,the correlation between thrombocytosis and nuclear grade was investigated and a significant correlation between them in all patients and both genders was found.Finally,there was no significant correlation between thrombocytosis and nuclear grade at various age groups.Conclusion:Prognostic indicators that can accurately predict survival rates in patients with RCC can be used to select those patients most likely to benefit from adjuvant therapy.In this survey there was a significant correlation between thrombocytosis and nuclear grade,however,further clinical studies are needed.