T Koyanagi

Hokkaido University, Sapporo-shi, Hokkaido, Japan

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Publications (372)691.09 Total impact

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    ABSTRACT: Abstract Two cases of retrocaval ureter are reported that were successfully treated by a laparoscopic approach. Case 1 was a 20-year-old woman who presented with symptoms of a right ureter stone. Case 2 was a 23-year-old woman who had suffered from recurrent right flank pain with gross hematuria. A transperitoneal approach was used for case 1, and a retroperitoneal approach was used in case 2. Both were successfully treated with laparoscopic ureteroureterostomy using an intracorporeal suture technique. Laparoscopic surgery should be the first choice for retrocaval ureter not only because of the minimal invasiveness but also because of the cosmetic advantage compared to conventional open surgery. Further technical and instrumental advances are essential for intracorporeal suturing.
    International Journal of Urology 07/2008; 8(2):71 - 74. · 1.73 Impact Factor
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    ABSTRACT: The epidermal growth factor (EGF) receptor has been suggested to have an important role in tumor initiation and progression of human bladder cancers. Grb2 protein, which is the downstream effector of the EGF receptor, acts as an adaptor protein between the EGF receptor and the Ras guanine-nucleotide exchange factor, son of sevenless (Sos) protein. Sos protein regulates the action of Ras protein by promoting the exchange of GDP for GTP . However, the significance of Grb2 and Sos proteins, which is related to EGF-triggered Ras activation, has not been elucidated in human bladder cancer. The aim of the present study is to clarify the significance of these proteins in human bladder cancer cell lines. In the present study, we used four human bladder cancer cell lines (T24, KU-7, UMUC-2, UMUC-6) and two kinds of cultured normal urothelial cells (HMKU-1, HMKU-2) isolated from patients with no malignancy. We examined the expression of EGF receptor, Grb2, and Sos proteins in these cells by Western blot analysis. Furthermore, the bladder cancer cell lines were subjected to sequence analysis to identify a point mutation in the c-H-ras gene at codon 12. There was no marked difference in the expression of the EGF receptor between human bladder cancer cell lines and cultured normal urothelial cells. On the other hand, expression of Grb2 and Sos proteins was substantially increased in all human bladder cancer cell lines examined in comparison with cultured normal urothelial cells, whether codon 12 of H-ras was mutated or not. These results suggest that the amplification of both Grb2 and SOS proteins plays an important role in the carcinogenesis of human bladder cancer.
    International Union of Biochemistry and Molecular Biology Life 01/2008; 49(4):317 - 320. · 2.79 Impact Factor
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    ABSTRACT: We examined the differential effects of the H-ras oncogene and the K-ras oncogene on cisplatin sensitivity in murine NIH/3T3 cells transfected with these oncogenes. Although the NIH/3T3 cells transformed with H-ras oncogenes (EJ-NIH/3T3 and Ha8-21) showed an increased resistance to cisplatin compared to the parental NIH/3T3, the cell lines transformed with K-ras oncogenes (DT and 1.8DNP2-2-5) did not. Compared with NIH/3T3, the 2 H-ras transformants reduced both the accumulation of cisplatin and the Na+,K+-ATPase activity in the membrane fraction. On the other hand, we observed no significant difference in cellular accumulation of cisplatin or in Na+,K+-ATPase activity between parental NIH/3T3 and the K-ras transformants. Since these ras transformants did not affect the cellular metallothionein content, transcriptional level of DNA polymerase β or activity of glutathione-S-transferase which is not associated with cisplatin sensitivity, these results suggest that cisplatin resistance is brought about by the H-ras oncogene, but not by K-ras, and that induction of cisplatin resistance by H-ras is mainly due to a reduction of cisplatin accumulation and an impairment of Na+, K+-ATPase activity in the membrane fraction.
    International Journal of Cancer 07/2006; 58(5):672 - 677. · 6.20 Impact Factor
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    ABSTRACT: The aim of the present study is to symptomatically analyze the extent to which pelvic nerve-sparing radical surgery for rectal cancer impacts on long-term voiding and male sexual function. A self-administered questionnaire was mailed to 68 patients who underwent pelvic nerve-sparing radical surgery for invasive rectal cancer with 52 responses (28 men and 24 women; 27 complete and 25 incomplete preservation; response rate 76.5%). Each patient was asked to record if there had been any changes in lower urinary tract symptoms after surgery. Sexual function was also investigated in men. Of the 52 patients, 48 (92%) maintained voluntary voiding without catheterization in the long term. Clean intermittent self-catheterization was performed in only four patients with incomplete preservation because of persistent voiding dysfunction. Subjectively, approximately 60% of the patients remained unchanged in lower urinary tract symptoms after surgery. The satisfaction rate regarding the current voiding status was significantly higher in women than in men (83% versus 61%, P = 0.0294), but was not significantly different between those with complete (76%) and incomplete preservation (64%). Despite the acceptable urinary status, 88% of men had some deterioration in the erectile function, regardless of the types of surgical procedures. Overall, 64% of men were unsatisfied with the current sexual function. Pelvic nerve-sparing radical surgery for rectal cancer preserved the long-term voiding function in the majority of patients. In completely preserved patients and in women, symptomatic outcomes were more satisfactory. Postoperative erectile dysfunction was found to be a serious problem, even in complete nerve-sparing procedure.
    International Journal of Urology 04/2005; 12(3):256-63. · 1.73 Impact Factor
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    ABSTRACT: Sulfotransferase, which catalyzes sulfation of the carbohydrate of galactosylceramide (GalCer) and is localised in the Golgi membrane of cells, was assayed for activity in human serum. To do this, an organic solvent was added to the incubated reaction mixture containing GalCer as an acceptor and phosphoadenosine phospho[35S]-sulfate as a donor of sulfate to dissociate the synthesized sulfolipid from serum protein. This was followed by isolation of the sulfolipid on an anion-exchange column. Through this procedure, human serum was found to contain sulfotransferase activity. The serum enzyme was activated by Mn2+. Km values of the enzyme for GalCer and ‘active sulfate’ were 4.6 μM and 5.2 μM, respectively. The enzyme activity was assayed in sera of cancer patients. The serum activity (mean ± SE, 0.27 ± 0.027 pmol ±μl−1· h−1) in renal cell carcinoma patients, whose activity has been demonstrated to be elevated, was significantly (P < 0.005) increased compared to that of the normal control (mean ± SE, 0.18 ± 0.0014 pmol ±μl−1· h−1) and of other urological tumors examined.
    European Journal of Biochemistry. 03/2005; 189(2):301 - 306.
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    ABSTRACT: Cyclosporine (CSA) and tacrolimus (TAC) frequently induce nephrotoxicity and similar pathologic changes. Acute CSA-induced nephrotoxicity has been reported to be mediated by activation of vasoconstrictors such as endothelin. The purpose of the present study was to investigate the acute effects of TAC and CSA on the renal microcirculation and upon a vasodilator such as nitric oxide (NO) production. Renal blood flow (RBF) in the microcirculation was measured by a Laser Doppler flow meter in uninephrectomised rats. RBF, mean arterial pressure (MAP), and renal vascular resistance (RVR) were measured in the following groups: (a) TAC (0.1 to 2.0 mg/kg/h, n = 3 approximately 6); CSA (20 and 50 mg/kg/h, n = 5); (b) L-NAME (10 mg/kg), an NO synthase inhibitor, 8 minutes prior to TAC (0.5 and 1.5 mg/kg/h, n = 5), or CSA (20 and 50 mg/kg/h, n = 5). Stable NO end-products, serum NO(2) and NO(3), were measured by the Griess method (n = 5). None of the parameters were changed by TAC alone, whereas TAC with L-NAME significantly reduced RBF (-28 +/- 7%) and increased RVR (46 +/- 17%) in a dose-dependent manner. CSA alone significantly reduced RBF (-37 +/- 6%) and increased RVR (69 +/- 22%) without any changes in MAP. The effects of CSA were enhanced by L-NAME. Serum concentration of NO(2) + NO(3) was significantly reduced by both L-NAME alone and CSA (50 mg/kg) (P < .05), while there were no changes with TAC (1.5 mg/kg). Blockade of NO production enhance the vasoconstrictive effect of CSA, and unmasked such an effect of TAC. These results suggest that the nephrotoxicity of CSA and TAC may involve the NO system.
    Transplantation Proceedings 10/2004; 36(7):2130-2. · 0.95 Impact Factor
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    ABSTRACT: The objective of this study was to retrospectively investigate the effectiveness of adjuvant combination chemotherapy for locally advanced urothelial cancer. Between 1987 and 1998, 56 patients with locally advanced bladder (n = 27) or upper urinary tract (n = 29) cancer (pathological stage T3, T4 or N1, N2 and M0) were treated by radical cystectomy or radical nephroureterectomy and regional lymphadenectomy. Thirty-one patients had lymph node-positive disease and 25 patients did not. Twenty patients underwent adjuvant chemotherapy and 36 patients were observed after surgery. Cox proportional hazards models were used to determine the impact of numerous clinicopathological findings on survival. A subgroup analysis of patients with lymph node-positive disease was conducted to evaluate disease-free survival and overall survival rates. In this series, the median follow-up period was 39 months (range, 4-163) after surgery. Disease-free and overall survival rates of all 56 patients were 45% and 58%, respectively, at 3 years. Only lymph node status was significantly associated with disease-free and overall survival in the multivariate analyses. In a subgroup analysis of patients with lymph node-positive disease, 16 patients who underwent adjuvant chemotherapy had superior disease-free survival compared to 15 patients with no adjuvant chemotherapy (P = 0.0376). These findings show that the prognosis of advanced urothelial cancer is significantly associated with nodal status. Furthermore, adjuvant combination chemotherapy has a positive impact on survival in patients with lymph node-positive disease.
    International Journal of Urology 08/2004; 11(7):456-60. · 1.73 Impact Factor
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    ABSTRACT: Patients with aggressive angiomyxoma may experience local recurrences. We report a case of recurrent aggressive angiomyxoma medically treated successfully with a gonadotropin-releasing hormone agonist. A 34-year-old woman with a huge perineal tumor underwent an extensive resection of the abdominoperineal tumor combined with total pelvic exenteration. Histology showed aggressive angiomyxoma and the tumor cells were immunoreactive for estrogen and progesterone receptors. Although the patient had experienced no local recurrence for 12 months under adjuvant therapy with a gonadotropin-releasing hormone agonist, a recurrence occurred 3 months after the completion of adjuvant therapy. The patient underwent medical treatment with a gonadotropin-releasing hormone agonist and had a complete resolution of the recurrent tumor again. Hormonal treatment with a gonadotropin-releasing hormone agonist can be applied for small primary aggressive angiomyxomas in addition to adjuvant therapy for residual tumors.
    International Journal of Urology 07/2004; 11(6):432-5. · 1.73 Impact Factor
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    ABSTRACT: Autotransplantation of the adrenal cortex may be a therapeutic alternative in the future. For successful adrenal transplantation revascularization is necessary. It is possible that vascular endothelial growth factor (VEGF), which is a potent angiogenic peptide, may have some roles in adrenal transplantation through 2 its receptors, kinase insert domain-containing region (Flk-1) and fms-like tyrosine kinase (Flt-1). Therefore, we studied sequential changes in expression of VEGF, Flk-1 and Flt-1 in regenerated adrenal. Eight to 9-week-old male Wistar rats underwent bilateral adrenalectomy and immediate adrenal capsular autotransplantation. The expression of VEGF, Flk-1 and Flt-1 was analyzed by immunohistochemistry and reverse-transcriptase-polymerase chain reaction. Angiogenesis was observed in the remodeling of adrenal sinusoidal endothelium during adrenal regeneration. Reverse transcriptase-polymerase chain reaction and immunohistochemistry showed that VEGF expression increased in grafted tissue with time after transplantation and its Flk-1 receptor, which localized to endothelial cells, increased transiently during the regeneration process. Immunostaining for Flt-1 receptor was identified in adrenocortical cells and its intensity gradually increased during adrenal regeneration. During adrenal gland regeneration VEGF and its receptors Flk-1 and Flt-1 are thought to be involved in neovascularization.
    The Journal of Urology 07/2004; 171(6 Pt 1):2445-9. · 3.75 Impact Factor
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    ABSTRACT: Hypospadias is one of the most common congenital anomalies in the world. Recently, increases in the prevalence of hypospadias have been reported in various countries including Japan. In this study, we examined whether the prevalence of hypospadias in Hokkaido, Japan, increased or not, using standardized diagnostic criteria. We also investigated the degree of its severity. We calculated prevalence of hypospadias using hospital records of hypospadias repair in Hokkaido. The prevalence from 1985 through 1997 by dividing the number of patients obtained from hospital records by the number of births. The average prevalence of hypospadias in Hokkaido was 3.9 per 10,000 births, and did not significantly change (p=0.7). The average proportions of distal, proximal and chordee alone were 56.7%, 39.6% and 3.7%, respectively. The decrease in the proportion of the proximal type was statistically significant (p=0.05) for the entire time period, whereas the proportion of the distal type did not have a significant upward trend for the observed 13 years (p=0.1). No significant changes in the prevalence of hypospadias existed in Hokkaido.
    Journal of Epidemiology 06/2004; 14(3):73-7. · 2.11 Impact Factor
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    ABSTRACT: To evaluate the incidence, nature and prognosis of multiple primary malignancies involving renal cell carcinoma (RCC) in Japan. Between 1975 and 1998, 319 patients underwent an operation for RCC at Hokkaido University, Sapporo, Japan. The incidence of other primary malignancies was determined and classified as antecedent, synchronous or subsequent. Follow-up was obtained by thorough chart review or telephone interview, and ranged from 0 to 276 months (median 49.0 months). To analyze the influence of other primary malignancies on prognosis, overall and cause-specific survival rates of the patients with an antecedent or synchronous malignancy were compared to the remaining patients. Of the 319 patients there was at least one other malignancy in 38 patients (12%). Four patients had two other malignancies. The other malignancies were antecedent in 13, synchronous in 19 and subsequent in 10 patients. Twenty-two patients had gastrointestinal cancer. In cases of antecedent or synchronous diagnosis of other primary malignancies, RCC was commonly incidental, small or low-stage. Multivariate analysis using Cox's proportional hazards model showed that, for overall survival, the presence of other antecedent or synchronous malignancies was the second most significant prognostic factor, following the pathological stage of RCC. In Japanese patients with RCC, the incidence of other primary malignancies was not uncommon and these malignancies contributed to the prognosis of these patients. Therefore, the malignant potential of individual tumors should be paid careful attention in the management of these patients.
    International Journal of Urology 06/2004; 11(5):269-75. · 1.73 Impact Factor
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    ABSTRACT: TIN (ifosfamide 1.5 g/m2 daily for 3 days, paclitaxel 175 mg/m2, and nedaplatin 70 mg/m2 on day 1) was administered to patients with metastatic urothelial cancer previously treated by platinum-based chemotherapy and repeated every 4 weeks. Four patients received maintenance therapy, which consisted of 5'-DFUR 800 mg/day orally for 12 weeks and 1 subsequent course of TIN. This therapy regimen was repeated for 2 years from initiation of TIN. Eleven of 12 patients (91.6%) demonstrated a major response (3 complete responses, 8 partial responses), with durations of response ranging from 3 to 20 months. Progression-free survival time was from 0 to 20 months (median 8 months). One-year progression-free survival rate was 45.8%. Overall survival time was from 2 to 20 months (median 10.5 months). One-year overall survival rate was 53.5%. Grade 3/4 hematologic toxicity involved neutropenia in 100% and thrombocytopenia in 33.3%. Febrile neutropenia was observed in 5 patients (41.6%). Grade 3 nonhematologic toxicity involved malaise in 15.3%. No patient discontinued this therapy because of complications. TIN is a potent, well-tolerated regimen for previously treated patients with urothelial cancer.
    Gan to kagaku ryoho. Cancer & chemotherapy 05/2004; 31(4):561-5.
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    ABSTRACT: Accumulating evidences indicate that cyclooxygenase (COX)-2 plays an important role in tumorigenesis in many human cancers. Yet the relationship between COX-2 and human renal cell carcinoma (RCC) remains unclear. The aim of our study was to evaluate COX-2 expression in human RCC cell lines and its role in tumorigenesis of human RCC. Among the human RCC cell lines (SMKT-R4, OS-RC-2, ACHN) and normal renal cell line RPTEC, COX-2 overexpression was found in OS-RC-2 cells both at mRNA and protein levels. COX-2 sense- and antisense-orientated vectors were constructed and transferred into RCC cells. Significant suppression of cellular proliferation was demonstrated in OS-RC-2 antisense transfectants, whereas promotion was found in SMKT-R4 sense transfectants by colony-forming assay despite the observation that COX-2 specific inhibitor NS398 exhibited similar IC50 among RCC cell lines by MTT assay. In comparison with parent cells and sense transfectants, significant suppression of COX-2 expression and PGE2 production and increase in butyrate-induced apoptosis were observed in OS-RC-2 antisense transfectants by Western blot, ELISA assay and FACS analysis, respectively. Furthermore, tumor growth and angiogenesis of OS-RC-2 antisense transfectants in nude mice was significantly suppressed and the survival time of these mice was significantly prolonged. Our study demonstrates that COX-2 is overexpressed in OS-RC-2 RCC cell line and plays an important role in tumorigenesis of the cells in vivo, which implies that COX-2 may be a therapeutic target for COX-2-expressing RCC, and that suppression of COX-2 expression by antisense-based strategy may have potential utility in treatment of COX-2-expressing RCC.
    International Journal of Cancer 04/2004; 108(6):825-32. · 6.20 Impact Factor
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    ABSTRACT: Intraperitoneal metastasis from a testicular germ cell tumor is very rare. We report a case in a 33-year-old man who was referred to Hokkaido University Hospital, Hokkaido, Japan, for further therapy for refractory seminoma. Physical examination revealed abdominal distension as a result of ascites, and cytology of the ascites showed seminoma cells. Although the ascites completely disappeared after treatment with a novel regimen of irinotecan-based chemotherapy, the patient had a recurrence of ascites and died of progressive disease 5 months after the start of the therapy.
    International Journal of Urology 04/2004; 11(3):184-6. · 1.73 Impact Factor
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    ABSTRACT: Intensive management is generally recommended for angiomyolipomas associated with tuberous sclerosis complex (TSC), which are known to have a more aggressive nature than sporadic tumors. In this study we evaluated the management of these tumors. The records of 6 men and 6 women with TSC and a mean age of 28.8 years) with angiomyolipomas treated from 1984 to 2000 were retrospectively analyzed. All patients had bilateral multiple tumors (mean size 6.6 cm). There were 10 lesions classified as small (less than 4 cm), 6 medium (4 to 10 cm) and 8 large lesions (10 cm or greater). Computerized tomography was repeated annually for followup observation and semiannually after embolization. Excluding from study 3 tumors treated prophylactically intervention was required in 20%, 50% and 100% of small, medium and large tumors, respectively. Among 14 tumors followed by observation, 8 grew and 4 required intervention. Uncontrollable hemorrhage did not develop in any patient. While some tumors showed remarkable growth in decade 3, growth did not exceed 1.5 cm per year. Embolization was performed in 11 tumors and tumors shrank in 10. Although 1 patient experienced renal atrophy, all patients but 1 are alive without renal failure with a mean followup of 60 months. Although asymptomatic angiomyolipomas associated with TSC grow gradually, severe hemorrhage is rare and most tumors can be managed conservatively with annual computerized tomography. Embolization is the first choice of intervention but should be reserved until symptoms develop.
    The Journal of Urology 02/2004; 171(1):102-5. · 3.75 Impact Factor
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    ABSTRACT: We performed extensive transperineal ultrasound guided template prostate biopsy and evaluated cancer core distribution. From August 2000 to May 2002, 113 men with prostate specific antigen levels between 4.0 and 10.0 ng/ml underwent template biopsy. Eighty-six had no previous biopsy (first group) and 27 had previous transrectal sextant biopsies (repeat group). A mean of 18.4 biopsy cores were taken. We defined the region over 2 cm from the rectal face of the prostate as the anterior region and the other as the posterior. Cancer was detected in 49 of 113 (43%) men. Forty-two were in the first group and seven in the repeat group. In the first group, the cancer core rate (cancer core number/biopsy core number) in the anterior region (7.0%) had no difference from that in the posterior region (8.6%) (P = 0.7111). But in the repeat group, the cancer core rate in the anterior region (4.6%) was higher than in the posterior (1.5%) (P < 0.0001). These results suggest that transrectal sextant biopsies miss more cancers in the anterior region than in the posterior. We believe template technique has an advantage to be able to detect cancer equally in the anterior and posterior.
    The Prostate 02/2004; 58(1):76-81. · 3.84 Impact Factor
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    ABSTRACT: We established the culture condition of seeding urothelial cells onto a scaffold for implantation into the peritoneal cavity and evaluated the histology of implanted urothelial cells. In part 1 of the study cultured porcine bladder urothelial cells were seeded onto 3 types of collagen gel made on microporous membrane, including collagen gel with or without cultured porcine bladder fibroblasts, or a feeder layer. The macroscopic and microscopic appearance of the gel with urothelial cells were examined in vitro. As an in vivo study, cultured porcine bladder urothelial cells were seeded onto a collagen gel/sponge matrix with or without cultured fibroblasts, or a feeder layer. Urothelial cell survival on each matrix was evaluated 28 days after implantation onto the omentum or mesentery of nude rats. In part 2 of the study rat urothelial cells were cultured and seeded onto fibrin gel/atelocollagen sponge matrix as an autologous implantation model. After 7 days of cultivation the matrix was folded with urothelial cells inside, implanted onto the mesentery and serially evaluated. Gel containing cultured fibroblasts was shrunken and basement membrane formation was observed on the gel with cultured fibroblasts or the feeder layer in vitro. Urothelial cells cultured with the feeder layer better survived on the collagen based matrix and formed a hollow-like lumen when implanted into the peritoneal cavity. The regenerated urothelium in an autologous implantation showed the same histological features as normal bladder urothelium. Selection of less degradable matrix and formation of basement membrane are critical for survival of implanted urothelial cells. The regenerated urothelium in an autologous implantation model seems to have the similar properties to the normal urothelium.
    The Journal of Urology 01/2004; 170(6 Pt 1):2480-5. · 3.75 Impact Factor
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    ABSTRACT: A 32-year-old man with a 1.7-cm tumor in the left kidney underwent laparoscopy-assisted partial nephrectomy. Although his postoperative course was uneventful, a 6-month postoperative CT scan showed hydronephrosis secondary to a severe stricture at the ureteropelvic junction. Heat injury to the urinary tract was strongly suspected. The use of microwave tissue coagulator for the tumor close to the renal sinus and excessive coagulation should be avoided to prevent heat-related complications.
    Journal of Endourology 01/2004; 17(10):919-21. · 2.07 Impact Factor
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    ABSTRACT: A 73-year-old man presented with gross hematuria. Ultrasonography and computerized tomography showed small bladder tumors and a left renal mass protruding to renal pelvis. Transurethral resection of bladder tumor and ureteroscopic tumor biopsy were performed, and pathological examinations revealed transitional cell carcinoma in the bladder and renal cell carcinoma in the kidney. He underwent left radical nephrectomy. A 4-month postoperative cystoscopy revealed a solitaly non-papillary tumor in the bladder. Transurethral resection was performed and pathological diagnosis was metastasis from renal cell carcinoma. At that time, multiple metastases to ureteral stump and lung were found. He had undergone palliative treatment because of his poor general condition until he died 26 months postoperatively. Care should be taken for management of ureteral stump when diagnostic ureteroscopy was done for renal cell carcinoma invading the renal pelvis.
    Nippon Hinyōkika Gakkai zasshi. The japanese journal of urology 12/2003; 94(7):705-8.
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    ABSTRACT: The therapeutic role of alpha-blockers in the treatment of voiding disorders due to benign prostatic hyperplasia has been extensively examined. To investigate a possible effect of alpha1-blocker on urodynamic voiding parameters in patients with neurogenic bladder, we conducted a clinical trial using tamsulosin. Twenty-four patients (14 men and 10 women) ranging from 24 to 82 years of age (mean age 61 years) with neurogenic bladder were analyzed. Urodynamic studies were performed before and after treatment with 0.4 mg tamsulosin daily for 4 weeks. On uroflowmetry, the average flow rate (from 4.6 +/- 3.3 to 6.7 +/- 3.0 mL/s, P = 0.04), maximum flow rate (from 9.4 +/- 6.8 to 14.1 +/- 7.0 mL/s, P = 0.016) and residual urine rate (from 46 +/- 29 to 32 +/- 21%, P = 0.02) improved significantly. In patients with detrusor contraction during voiding, detrusor opening pressure and detrusor pressure at maximum flow decreased significantly from 69.0 +/- 36.2 to 49.2 +/- 26.4 cmH2O (P = 0.046) and from 66.7 +/- 34.6 to 53.6 +/- 26.5 cmH2O (P = 0.007), respectively. On the other hand, in patients with detrusor areflexia, vesical opening pressure (from 78.2 +/- 23.4 to 61.6 +/- 25.2 cmH2O), or vesical pressure at maximum flow (from 68.6 +/- 23.2 to 62.9 +/- 25.2 cmH2O) did not change significantly after treatment. Tamsulosin reduces functional urethral resistance during voiding and improves flow rate in patients with neurogenic bladder. It has more beneficial urodynamic effects in patients with detrusor contraction during voiding than in patients with detrusor areflexia.
    International Journal of Urology 12/2003; 10(11):576-81. · 1.73 Impact Factor

Publication Stats

2k Citations
691.09 Total Impact Points

Institutions

  • 1979–2008
    • Hokkaido University
      • • Department of Urology
      • • Department of Pathology
      • • Department of Nuclear Medicine
      Sapporo-shi, Hokkaido, Japan
  • 1977–2008
    • Hokkaido University Hospital
      • Division of Urology
      Sapporo-shi, Hokkaido, Japan
  • 2004
    • Sapporo Kosei General Hospital
      Sapporo, Hokkaidō, Japan
  • 1993–2004
    • Sapporo City General Hospital
      Sapporo, Hokkaidō, Japan
    • Hokkaido Memorial Hospital Of Urology
      Sapporo, Hokkaidō, Japan
  • 1996
    • Nikko Memorial Hospital
      Hidachi, Ibaraki, Japan