Biomedical subjects

Masanobu Shigeta

Publications and source records attributed to Masanobu Shigeta.

6 recordsLinked to original sources

PubMed2006

Women's perception of male erectile dysfunction drugs in the general population.

OBJECTIVE: The aim of this study is to investigate trends in women's perception of male erectile dysfunction (ED) drugs in the general population. METHODS: We designed an online questionnaire survey and randomly invited an initial total of 2370 women to respond to it from a database population that included 450,000 men and women recruited through an Internet-based market research company. The 17 items of the questionnaire comprised 9 items related to socio-cultural background and 8 items related to the perception of ED drugs, ED itself, and sexual relations. RESULTS: A total of 1262 women (53.2% of those initially invited), ranging in age from 20 to 77 years, participated. Among the participants, 83.3% were aware of the existence of ED drugs, but only 12.0% showed some interest in them, 46.4% and 43.2% of the participants claimed to have an unfavorable image of ED drugs, and of men using ED drugs, respectively. Among the participants, 45.2% stated that if their partners suffered from ED at present or in the future, they would not desire their partners to use ED drugs, and 25.5% stated that they would not accept it. Multiple logistic regression analysis revealed that higher age had a negative impact on knowledge, interest and image of ED drugs, the image of men using ED drugs, and the importance of sexual relations. CONCLUSIONS: Our findings reveal that a high proportion of women have a negative perception of ED drugs and associated issues in Japan.

Adult↗

PubMed2005

Urological retroperitoneoscopic surgery for patients with prior intra-abdominal surgery.

OBJECTIVE: To determine whether previous intra-abdominal surgery is associated with surgical outcome in patients undergoing urological retroperitoneoscopic surgery. PATIENTS AND METHODS: One hundred seventeen cases of urological retroperitoneoscopic surgery, including 78 cases of retroperitoneoscopic radical nephrectomy (RN) for localized renal tumor and 39 cases of retroperitoneoscope-assisted radical nephroureterectomy (RNU) for upper urinary tract cancer, were evaluated. Thirty (38.5%) of the 78 patients who underwent RN and 13 (33.3%) of the 39 patients who underwent RNU had a history of intra-abdominal surgery. The patients were divided into two groups: those who had undergone prior intra-abdominal surgery (OP+) and those who had not (OP-). Patients' backgrounds, degree of surgical invasiveness, and period of convalescence were compared between the OP+ and OP- groups. RESULTS: There was no significant difference between the OP+ and OP- groups in terms of background, surgical invasiveness or convalescence, except for age in the patients who had undergone RN. Complications in the studied cases were unrelated to any history of intra-abdominal surgery. CONCLUSION: Previous intra-abdominal surgery is not associated with a negative outcome of urological retroperitoneoscopic surgery in patients with localized renal tumors and those with upper urinary tract cancer.

Abdomen↗

PubMed2005

Laparoscopic nephron-sparing surgery: preoperative assessment with three-dimensional computed tomography.

OBJECTIVE: For retroperitoneal laparoscopic nephron-sparing surgery using a microwave tissue coagulator, it is helpful to know the relationship between the tumour, collecting system and vessels to prevent urinary leakage and vascular damage. We assessed the efficacy of multiplanar reformation and three-dimensional (3D) CT with the renal collecting system filled with contrast medium. METHODS: Fifteen patients with small renal tumours of less than 3 cm in diameter underwent dynamic CT examination ten minutes after injection of contrast medium of 30 ml. Multiplanar reformation, volume-rendered and maximum intensity projection images were created for determining operative approaches and for planning the operation. RESULTS: In all cases, the distance between the tumour and collecting system was measured on the multiplanar reformation. Accordingly, five cases were indicated for retroperitoneal laparoscopic nephron-sparing surgery using a microwave tissue coagulator. The remaining ten cases, due to the short distance (less than 10mm), were not considered good candidates for this procedure. The relationship between the tumour, collecting system and vessels was well shown on the volume-rendered and maximum intensity projection images. CONCLUSIONS: Multiplanar reformation and 3D-CT are able to give us an understanding of the surrounding structures. They are helpful in defining the indications for retroperitoneal laparoscopic nephron-sparing surgery using a microwave tissue coagulator and preoperative planning of nephron-sparing surgery.

Aged↗

PubMed2005

Impact of radical perineal prostatectomy on urinary continence and quality of life: a longitudinal study of Japanese patients.

AIM: We used self-completed questionnaires to obtain a longitudinal assessment of urinary continence and urinary, bowel, and sexual domain-related quality of life (QOL) in Japanese patients undergoing radical perineal prostatectomy (RPP). METHODS: A total of 41 Japanese patients with a median age of 69 years who underwent RPP between February 2002 and February 2004 were included in the study. We measured QOL by the University of California, Los Angeles, Prostate Cancer Index (UCLA-PCI) and assessed urinary continence on the basis of three different definitions of continence. The International Prostate Symptom Score (I-PSS) was also included to evaluate lower urinary tract symptoms (LUTS). RESULTS: When urinary continence was de fi ned as none, one, or two protective pads per day, 100%, 73%, 94%, 97%, or 100% of the patients were continent before, and 1, 3, 6, and 12 months after, RPP, respectively. When it was de fi ned as total control or occasional dribbling, the corresponding values were 97%, 70%, 84%, 94%, and 97%. Urinary function returned to the preoperative baseline level by 6 months postoperatively and scores for urinary bother had significantly surpassed the baseline by 12 months (P = 0.043). The I-PSS was significantly improved (P = 0.014), with a mean 4.7-unit decrease. Sexual function worsened significantly after surgery, and its recovery was less favorable. No significant change was observed in scores for bowel function or bowel bother. CONCLUSIONS: The majority of patients who undergo RPP rapidly regain urinary continence and QOL within 3-6 months. RPP has a favorable impact on LUTS.

Age Factors↗

PubMed2005

[Comparison of endoscopic versus open radical nephrectomy for stage T1 and T2 renal cancer].

The aim of this study was to compare the efficacy, efficiency and patient well-being of endoscopic radical nephrectomy (ERN) with those of open radical nephrectomy (ORN) in patients with stage T1 and stage T2 renal cell carcinoma during the period from 1995 to 2003. Eighty-four patients including 53 patients receiving ERN and 31 patients receiving ORN were evaluated. The two groups were analyzed for sex, side of tumor, clinical stage, age, tumor diameter, operative time, operative blood loss, postoperative time to oral intake and ambulation. There was no difference in patient background between the ERN and ORN groups. Although the mean operative times between the ORN and ERN group were not different (mean 240 versus 267 min. in ERN group, P N .S.), ERN patients had significantly less operative blood loss (mean 123 versus 469 ml. in ERN group, P < 0.01), significantly shorter time to start the oral intake of rice gruel (mean 1.4 versus 4.6 days. in ERN group, P < 0.01) and significantly shorter time to ambulation (mean 1.2 versus 3.1 days. in ERN group, P < 0.01). These findings revealed that endoscopic radical nephrectomy for the patients with stage T1 and T2 renal cell carcinoma appears to be associated with less morbidity and faster recovery rather than open radical nephrectomy.

Adolescent↗

PubMed2002

Three-dimensional navigator for retroperitoneal laparoscopic nephrectomy using multidetector row computerized tomography.

PURPOSE: We evaluated the efficacy of a 3-dimensional (D) navigator for retroperitoneal laparoscopic nephrectomy. MATERIALS AND METHODS: A total of 21 patients with malignant localized renal (16) or ureteral (5) neoplasms underwent multi-detector row computerized tomography. The 3-D navigator was created using volume rendering technique. These findings were compared with videos obtained during laparoscopy. RESULTS: The 3-D navigator depicted all renal arteries (100% sensitivity) and 24 of the 25 renal veins (96% sensitivity). Hilar anatomy, including the tumor, major vessels and adrenal gland, and their relationships were visualized as in laparoscopic views. CONCLUSIONS: The 3-D navigator has a potentially important role in retroperitoneal laparoscopic nephrectomy. It is able to guide surgeons and aid in avoiding operative risks and possible complications.

Adult↗