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Dive into the research topics where Yasuhisa Furuya is active.

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Featured researches published by Yasuhisa Furuya.


Urology | 2003

Diagnosis and treatment of voiding symptoms.

Masayuki Takeda; Isao Araki; Manabu Kamiyama; Yoshio Takihana; Mitsuo Komuro; Yasuhisa Furuya

Lower urinary tract symptoms (LUTS) are associated with lower urinary tract dysfunction. Symptoms are the subjective indicator of a disease or change in condition as perceived by the patient, caregiver, or partner and may lead the individual to seek help from health care professionals. LUTS are usually qualitative and, therefore, cannot usually be used to make a definitive diagnosis. LUTS also can indicate pathologies other than lower urinary tract dysfunction, such as urinary infection. LUTS are divided into 7 groups: storage, voiding (obstructive), postmicturition symptoms and 4 others. Voiding symptoms, which are caused by lower urinary tract obstruction, include slow stream, splitting or spraying, intermittency, hesitancy, straining, and terminal dribble. Postmicturition symptoms, which are experienced immediately after micturition, consist of the feeling of incomplete emptying and postmicturition dribble. Postmicturition dribble describes the involuntary loss of urine immediately after the individual has finished passing urine; in men, usually after leaving the toilet and in women, after rising from the toilet. Hence, postmicturition dribble is elicited by different situations or is considered as having different implications. For example, although postmicturition dribble usually implies incomplete emptying (voiding symptoms) in elderly men with benign prostatic hyperplasia, postmicturition dribble is often considered as urinary incontinence (a storage symptom) in many patients, even with bladder outlet obstruction. In such cases, detailed history taking and further evaluation, such as urinary flowmetry, postvoid residual volume, and comprehensive urodynamic evaluation, should be performed as appropriate. If no urodynamic abnormalities of either the detrusor or the outlet can be detected despite significant LUTS, factors unrelated to the lower urinary tract may be responsible for the voiding symptoms.


Journal of Endourology | 2003

Retroperitoneoscopic Nephron-Sparing Surgery of Renal Tumor Using a Microwave Tissue Coagulator without Renal Ischemia: Comparison with Open Procedure

Yasuhisa Furuya; Takayuki Tsuchida; Yoshio Takihana; Isao Araki; Nobuaki Tanabe; Masayuki Takeda

PURPOSE It is ideal to use not a transperitoneal but a retroperitoneal approach for both open and endoscopic partial nephrectomy. We compared the results of retroperitoneoscopic nephron-sparing surgery for small renal tumors using a microwave tissue coagulator without renal pedicle clamping with those of a retroperitoneal open procedure. PATIENTS AND METHODS Between 1996 and 2002, eight patients with small renal tumors underwent retroperitoneoscopic partial nephrectomy without renal ischemia, and nine patients with small renal tumors underwent open partial nephrectomy via a retroperitoneal approach. Both groups were operated on using a microwave tissue coagulator. RESULTS Retroperitoneoscopic partial nephrectomy without renal ischemia was performed without any major or minor complications in any patient. The mean operation time for retroperitoneoscopic surgery was significantly longer than that for open partial nephrectomy (221.9 minutes v 145.9 minutes; P = 0.0004). However, the mean estimated blood loss for retroperitoneoscopic surgery was less than that for open partial nephrectomy (137.5 mL v 334.8 mL; P = 0.012). In addition, the retroperitoneoscopic group seemed to recover more rapidly than the open surgery group. CONCLUSIONS Retroperitoneoscopic nephron-sparing surgery of small renal tumors using a microwave tissue coagulator without renal ischemia is feasible as minimally invasive procedure. It results in saving renal function, minimal blood loss, and rapid recovery.


International Journal of Urology | 2006

Decreased expression of G protein‐coupled receptor kinases in the detrusor smooth muscle of human urinary bladder with outlet obstruction

Yasuhisa Furuya; Isao Araki; Manabu Kamiyama; Hidenori Zakoji; Yoshio Takihana; Masayuki Takeda

Aim: We examine the expression of mRNA of G protein‐coupled receptor kinase (GRK) subtypes and muscarinic acetylcholine receptor (M) subtypes in the detrusor smooth muscle of the human urinary bladder. Furthermore, we confirm the presence and the localization of GRK proteins in the detrusor smooth muscle of the obstructed bladder in comparison with the control bladder.


International Journal of Impotence Research | 2006

Gene and protein expression profiles of prostaglandin E2 receptor subtypes in the human corpus cavernosum

Mitsuo Komuro; Manabu Kamiyama; Yasuhisa Furuya; Yoshio Takihana; Isao Araki; Masayuki Takeda

Prostaglandin E1 leads to penile erection, mainly via prostaglandin E2 (EP) receptors. This study aimed to identify the expression profile of EP receptor genes in human corpus cavernosum. Using the quantitative real-time reverse transcription polymerase chain reaction, the mRNA levels of EP receptor subtypes were measured. In addition, expressions of EP receptor subtype proteins were determined by immunohistochemical method. Among the four subtypes, EP4 receptor mRNA expression was the highest, and EP2 receptor mRNA followed, whereas EP1 and EP3 receptor mRNAs were hardly observed. Expression level of EP4 receptor mRNA was significantly higher than that of EP2 receptor mRNA. Expression of both EP2 and EP4 receptor proteins were clearly detected in the cavernous smooth muscle. These results may suggest that EP4 receptor plays an important role among four EP receptor subtypes for relaxation of smooth muscle in the human corpus cavernosum.


International Journal of Urology | 2005

Modified endoscopic live donor nephrectomy: Retroperitoneoscopy followed by hand‐assistance

Yasuhisa Furuya; Isao Araki; Hidenori Zakoji; Yoshio Takihana; Nobuaki Tanabe; Masayuki Takeda

Abstract  We have developed a novel modification of previous approaches to donor nephrectomy and herein review our original operative procedure. First, the posterior aspect of the kidney was dissected retroperitoneoscopically and dissection of the renal artery, ureter and gonadal vein was almost completed. Second, the anterior aspect of the kidney was dissected with transperitoneal hand‐assistance, and dissection of the renal pedicle from the anterior surface was accomplished easily and safely. This operative procedure was successfully performed for two donors with no intraoperative or postoperative complications. Our modified endoscopic donor nephrectomy is feasible as a minimally invasive procedure because of its safety, and its ability to preserve renal function and establish an excellent operative field for both posterior and anterior aspects of the kidney.


Urology | 2004

Overexpression of epithelial sodium channels in epithelium of human urinary bladder with outlet obstruction

Isao Araki; Shuqi Du; Manabu Kamiyama; Yuki Mikami; Kazumichi Matsushita; Mitsuo Komuro; Yasuhisa Furuya; Masayuki Takeda


The Journal of Urology | 2003

Lower urinary tract symptoms in men and women without underlying disease causing micturition disorder: a cross-sectional study assessing the natural history of bladder function.

Isao Araki; Hidenori Zakoji; Mitsuo Komuro; Yasuhisa Furuya; Mizuya Fukasawa; Yoshio Takihana; Masayuki Takeda


Japanese journal of endourology and ESWL | 2009

Pure laparoscopic partial nephrectomy for primary renal carcinoid

Hideki Kobayashi; Yaburu Haneda; Hidenori Zakoji; Yasuhisa Furuya; Isao Araki; Masayuki Takeda


The Journal of Urology | 2008

EFFICACY AND SAFETY OF PACLITAXEL AND GEMCITABINE COMBINATION AS THE CHEMOTHERAPY FOR ADVANCED/METASTATIC UROTHELIAL CANCER IN A SINGLE CENTER IN JAPAN

Akimitsu Maniwa; Manabu Kamiyama; Yuki Mikami; Yasuhisa Furuya; Hidenori Zakoji; Takayuki Tsuchida; Teruhisa Nomura; Mizuya Fukazawa; Yoshio Takihana; Isao Araki; Masayuki Takeda


Japanese journal of endourology and ESWL | 2006

The use of absorbable clips for renal parenchymal suturing makes warm ischemia time short during laparoscopic partial nephrectomy in a porcine model

Hidenori Zakoji; Teruhisa Nomura; Takayuki Tsuchida; Yasuhisa Furuya; Mizuya Fukasawa; Yoshio Takihana; Isao Araki; Masayuki Takeda

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Isao Araki

University of Yamanashi

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