The concentration of phosphate and ammonium nitrogen increases in early to middle June in Watarase reservoir. Although the concentration of these inorganic components increases, both total phosphorus ...and nitrogen do not increase. Since total concentration does not increase, the augmentation may not be a simple result of nutrient release from bottom sediments. We have conducted a series of intensive field measurement of water quality change in Watarase reservoir and numerical simulation to analyze the mass balance quantitatively. Simulation results hypothesizing that phytoplankton was grazed by zooplankton and organic nutrients were mineralized rapidly agreed very well with the observed results. This shows the importance of the comparison of intensive field data and comprehensive ecological model.
The absorption spectra of mixed solutions composed of 1,4-dimethyl-naphthalene (DMN) and
p-chloranil (pC) in tetraethyl orthosilicate dispersions during a sol–gel reaction catalyzed by HCl at room ...temperature have been observed as a function of time. Just after preparing the solution, the absorption band of the charge-transfer (CT) absorption at around 535 nm due to the CT complex formation between pC and DMN was barely visible. As the sol–gel reaction proceeded, the intensity of the CT band increased with reaction time. This increase in the CT absorption band was highly enhanced after the gelation and stopped after ca. 100 days.
Uretero-aortic Fistula: A Case Report Takeshi NOMOTO; Yoshiyuki TANAKA; Kousuke YAMAMOTO
The Tokai Journal of Experimental and Clinical Medicine,
2009, Letnik:
34, Številka:
1
Journal Article
We report a case of uretero-aortic fistula following prolonged ureteral stenting in the left ureter which crossed over the aorta toward the cutaneous ureterostomy stoma. A 59 year-old woman presented ...massive bleeding from the left cutaneous ureterostomy of the single stoma for bilateral ureters. The patient underwent radical hysterectomy and total cystectomy with a single stoma cutaneous ureterostomy for advanced cervical and bladder cancers. The postoperative course was uneventful except for pyelonephritis due to bilateral ureteral stenosis, which were treated by bilateral ureteral stenting. The patient had intermittent hematuria from the left cutaneous ureterostomy for 4 years after ureteral stenting. Massive bleeding from the left cutaneous ureterostomy requiring a big amount of blood transfusion followed intermittent hematuria, finally. A computed tomography (CT) suggested both severe adhesion of the left ureter to the aorta and left renal pelvic hematoma. Massive bleeding seemed to be caused by uretero-aortic fistula. A fistula, about 5 mm in diameter, from the left ureter to the aorta was detected at exploration. The defect of aortic wall was closed primarily and then left nephroureterectomy underwent for nonfunctioning kidney. Her postoperative course was uneventful at the 18-month follow-up.
Objective: The aim of this study was to evaluate the relationship between urolithiasis and characteristics of renal shape in adult patients with horseshoe kidney (HSK) diagnosed on multidetector row ...computed tomography (MDCT). Methods: We evaluated 36 patients with HSK and urolithiasis (Group A) and 70 patients with HSK without urolithiasis (Group B) whose disease was diagnosed on non-contrast MDCT. Two radiologists measured minimum width of the renal isthmus and maximum length of the renal pelvis and evaluated coexisting neoplastic diseases on axial computed tomographic (CT) images with 5-mm reconstruction, and we compared those measurements between the Groups A and B. Results: The overall mean maximum length of the renal pelvis, 12.7+-9.2 mm, did not differ significantly between the 2 groups. Minimum isthmus width was larger in patients with HSK and urolithiasis (11.0+-5.6 mm), than those without urolithiasis (9.5+-5.1 mm). No patient in either groups had a urological renal tumor. Conclusions: Patients of HSK might have tendency of a high incidence of stone formation. Because urolithiasis is a risk factor for tumors of the renal pelvis, monitoring of patients with HSK requires careful attention to isthmus width on CT images.
Uretero-aortic fistula: a case report Nomoto, Takeshi; Tanaka, Yoshiyuki; Yamamoto, Kousuke
The Tokai journal of experimental and clinical medicine,
2009-Apr-20, Letnik:
34, Številka:
1
Journal Article
We report a case of uretero-aortic fistula following prolonged ureteral stenting in the left ureter which crossed over the aorta toward the cutaneous ureterostomy stoma. A 59 year-old woman presented ...massive bleeding from the left cutaneous ureterostomy of the single stoma for bilateral ureters. The patient underwent radical hysterectomy and total cystectomy with a single stoma cutaneous ureterostomy for advanced cervical and bladder cancers. The postoperative course was uneventful except for pyelonephritis due to bilateral ureteral stenosis, which were treated by bilateral ureteral stenting. The patient had intermittent hematuria from the left cutaneous ureterostomy for 4 years after ureteral stenting. Massive bleeding from the left cutaneous ureterostomy requiring a big amount of blood transfusion followed intermittent hematuria, finally. A Computed tomography (CT) suggested both severe adhesion of the left ureter to the aorta and left renal pelvic hematoma. Massive bleeding seemed to be caused by uretero-aortic fistula. A fistula, about 5 mm in diameter, from the left ureter to the aorta was detected at exploration. The defect of aortic wall was closed primarily and then left nephroureterectomy underwent for nonfunctioning kidney. Her postoperative course was uneventful at the 18-month follow-up.
The aim of this study was to evaluate the relationship between urolithiasis and characteristics of renal shape in adult patients with horseshoe kidney (HSK) diagnosed on multidetector row computed ...tomography (MDCT).
We evaluated 36 patients with HSK and urolithiasis (Group A) and 70 patients with HSK without urolithiasis (Group B) whose disease was diagnosed on non-contrast MDCT. Two radiologists measured minimum width of the renal isthmus and maximum length of the renal pelvis and evaluated coexisting neoplastic diseases on axial computed tomographic (CT) images with 5-mm reconstruction, and we compared those measurements between the Groups A and B.
The overall mean maximum length of the renal pelvis, 12.7±9.2 mm, did not differ significantly between the 2 groups. Minimum isthmus width was larger in patients with HSK and urolithiasis (11.0±5.6 mm), than those without urolithiasis (9.5±5.1 mm). No patient in either groups had a urological renal tumor.
Patients of HSK might have tendency of a high incidence of stone formation. Because urolithiasis is a risk factor for tumors of the renal pelvis, monitoring of patients with HSK requires careful attention to isthmus width on CT images.
(Background) The objective of this study is to determine age-specific PSA reference ranges in Japanese healthy men and investigate the effectiveness of these ranges as the cut-off values in the mas ...screening for prostatic cancer. (Methods) The study included a total of 5, 206 male aged from 55 to 89 years old who wished to submit the mass screening for prostatic cancer in an urban area of Kyoto in 1995-1997, but had no evident prostatic cancer. We measured serum PSA levels by the filter paper method (Delfia PSA kit). (Results) We found the increase in serum PSA levels with the advancing age. With the 95th percentile for serum PSA as the upper limit, the age-specific PSA reference ranges were determined to be 2.1ng/ml for patients aged 55 to 59 years old, 3.2ng/ml for 60 to 69 years old, 4.4ng/ml for 70 to 79 years old, 6.5ng/ml for 80 to 89 years old. If we used these ranges as the cut-off values in the mass screening this time, five cases from 76 to 89 years old of prostatic cancer were overlooked. (Conclusion) We found the increase in serum PSA levels with advancing age. But the positive proof of using this range to a mass screening for prostatic cancer was not certified, because time incidence of prostatic cancer in the examinees was uncertain and there is a possibility of overlooking some cases.
(Purpose) The purpose of this study is to evaluate prognostic factors of renal cell carcinoma using univariate statistics. Materials and methods: Materials are 182 patients treated from 1976 to 1992. ...Kaplan-Meier method and generalized wilcoxon test were used for statistical analysis. (Results) Seventy cases were found incidentally without any symptoms. The overall 5- and 10-year survival rates by Kaplan-Meier method were 73.8% and 66.2%. respectively. In the univariate analysis, sex, chief complaints, tumor sizes, T-Stages, venous invasions and grades were statistically significant prognostic factors. The prognosis of males more than 60 years of age was significantly poor. The prognosis of patients with incidentalomas was far better than that of symptomatic patients. (Conclusion) Sex and chief complaints were pointed out as significant prognostic factors for renal cell carcinoma.
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