Hiromasa Kiura

Hiroshima University, Hirosima, Hiroshima, Japan

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Publications (7)6.29 Total impact

  • Nihon Toseki Igakkai Zasshi 01/2006; 39(12):1593-1596. DOI:10.4009/jsdt.39.1593
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    ABSTRACT: A 21-year-old woman who had been injured in a traffic accident appeared with abdominal pain and macroscopic hematuria. Computed tomography (CT) performed 6 hours after the injury showed extravasation of contrast medium in the right retroperitoneal space. Retrograde pyelography (RP) showed the interruption of right ureter at the site of ureteropelvic junction. We performed an abdominal operation 15 hours after the injury under the diagnosis of right ureteral avulsion. We observed a completely separated right ureter at the ureteropelvic junction, and performed an end to end anastomosis. The patient was discharged three weeks after surgery, and has not had any problems for three years.
    Hinyokika kiyo. Acta urologica Japonica 04/2004; 50(3):187-90.
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    ABSTRACT: We report the efficacy and safety of endovascular treatment of basilar tip aneurysms (BTA) in five patients with moyamoya disease. The patients underwent intra-aneurysmal embolisation with detachable platinum coils. Three BTA presented with subarachnoid haemorrhage (SAH); the other two were asymptomatic. In four cases, one embolisation procedure produced >95% angiographic obliteration of the aneurysm. In the other patient, 80-90% obliteration was achieved initially, but due to growth of the residual aneurysm, the procedure was repeated 7 months later. Two patients experienced transient oculomotor paresis as a procedure-related complication. Mean follow-up was 43.6+/-34.0 months (range 8-92 months). One patient died of putaminal haemorrhage unrelated to the aneurysm 15 months after embolisation. The other four had no subsequent SAH and survived without sequelae. Endovascular embolisation using detachable platinum coils proved to be a safe and efficient treatment modality for BTA associated with moyamoya disease.
    Neuroradiology 07/2003; 45(7):441-4. DOI:10.1007/s00234-003-0997-x · 2.49 Impact Factor
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    ABSTRACT: A 66-year-old man presented at our hospital with left back pain. Intravenous pyelography, computerized tomography and magnetic resonance imaging revealed ureteral tumors of the complete left double renal pelvis and the ureter. An endoscopic examination disclosed a papillary tumor from the left ureteral orifice of the lower pole of the kidney. A transurethral resection of the tumor was done, and the pathological features revealed transitional cell carcinoma (PTa, grade 2). A left nephroureterectomy and a partial cystectomy were also carried out; macroscopic examinations showed a non-papillary tumor on the middle portion of the left ureter originating from the upper pole of the kidney. Microscopic examinations revealed transitional cell carcinoma (PT3, grade 3, PL1, PV1). Adjuvant chemotherapy (M-VAC) was administered but discontinued because of severe side effects. Dispite recurrence with retro-peritoneal lymph node metastasis, the patient is alive and again undergoing M-VAC chemotherapy 22 months after the initial surgery. However, the evaluation of the chemotherapy was "no change".
    Hinyokika kiyo. Acta urologica Japonica 01/2003; 48(12):761-4.
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    ABSTRACT: Electrolyzed strong acid water (ESW) containing free chlorine at various concentrations is becoming to be available in clinical settings as a disinfectant. ESW is prepared by electrolysis of a NaCl solution, and has a corrosive activity against medical instruments. Although lower concentrations of NaCl and free chlorine are desired to eliminate corrosion, the germicidal effect of ESW with low NaCl and free-chlorine concentrations (ESW-L) has not been fully clarified. In this study, we demonstrated that ESW-L possesses bactericidal activity against Mycobacteria and spores of Bacillus subtilis. The effect was slightly weaker than that of ESW containing higher NaCl and free-chlorine concentrations (ESW-H), but acceptable as a disinfectant. To clarify the mechanism of the bactericidal activity, we investigated ESW-L-treated Pseudomonas aeruginosa by transmission electron microscopy, a bacterial enzyme assay and restriction fragment length polymorphism pattern (RFLP) assay. Since the bacterium, whose growth was completely inhibited by ESW-L, revealed the inactivation of cytoplasmic enzyme, blebs and breaks in its outer membrane and remained complete RFLP of DNA, damage of the outer membrane and inactivation of cytoplasmic enzyme are the important determinants of the bactericidal activity.
    Journal of Microbiological Methods 06/2002; 49(3):285-93. DOI:10.1016/S0167-7012(01)00385-2 · 2.03 Impact Factor
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    ABSTRACT: Electrolyzed products of sodium chloride solution were examined for their disinfection potential against hepatitis B virus (HBV) and human immunodeficiency virus (HIV) in vitro. Electrolysis of 0.05% NaCl in tap water was carried out for 45 min at room temperature using a 3 A electric current in separate wells installed with positive and negative electrodes. The electrolyzed products were obtained from the positive well. The oxidation reduction potential (ORP), pH and free chlorine content of the product were 1053 mV, pH 2.34 and 4.20 ppm, respectively. The products modified the antigenicity of the surface protein of HBV as well as the infectivity of HIV in time- and concentration-dependent manner. Although the inactivating potential was decreased by the addition of contaminating protein, recycling of the product or continuous addition of fresh product may restore the complete disinfection against bloodborne pathogens.
    Journal of Virological Methods 04/2000; 85(1-2):163-74. DOI:10.1016/S0166-0934(99)00165-2 · 1.78 Impact Factor
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    ABSTRACT: A 45-year-old woman with a history of right regional dull pain was referred to our hospital for evaluation of right hydronephrosis. CT and MRI showed a solitary mass (1 x 1 cm, L1-L2 level) at the right upper ureter. Laboratory data were within the normal range. A right nephrectomy was carried out under a clinical diagnosis of primary right ureteral tumor. The pathohistological diagnosis of surgical specimen was plasma cell type of Castleman's disease. One year after surgery, the patient was rehospitalized for azotemia and left hydronephrosis. Abdominal CT revealed a solitary mass (1.5 x 1.5 cm) located at left upper ureter similar to that on her right side. We diagnosed that the mass lesion was due to asynchronous Castleman's disease, so we performed steroid therapy. After the treatment, mass had disappeared. The patient is uneventful for two years. This is the first case reported in the Japanese literature describing Castleman's disease occurred around the bilateral upper ureters.
    Nippon Hinyōkika Gakkai zasshi. The japanese journal of urology 07/1998; 89(6):618-21. DOI:10.5980/jpnjurol1989.89.618

Publication Stats

146 Citations
6.29 Total Impact Points


  • 2003
    • Hiroshima University
      • Department of Neurosurgery
      Hirosima, Hiroshima, Japan
  • 1998–2002
    • Osaka Medical College
      • • Department of Microbiology
      • • Department of Urology
      Takatuki, Ōsaka, Japan