Journal of Nippon Medical School: Vol.71 No.6 page.392

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ArticleTitle Laparoscopic Partial Nephrectomy Using a Microwave Tissue Coagulator for Treating Small Peripheral Renal Tumors

AuthorList Tsutomu Hamasaki, Yukihiro Kondo, Ichiro Matuzawa, Narumi Tsuboi and Taiji Nishimura

Affiliation Department of Urology, Nippon Medical School

Language EN

Volume 71

Issue 6

Year 2004

Page 392-398

Received July 2, 2004

Accepted September 13, 2004

Keywords renal cell carcinoma, partial nephrectomy, laparoscopic surgery, microwave tissue coagulator

Abstract Background: Laparoscopic partial nephrectomy has been recently applied as a minimally invasive procedure. Several non-ischemic operation devices in partial nephrectomy have been developed. However, the problem related to maintenance of renal homeostasis remains. We investigated the efficacy and safety of a microwave tissue coagulator in laparoscopic partial nephrectomy.
Methods: Between April 2001 and February 2003, eleven patients with small renal tumors underwent laparoscopic partial nephrectomy using a microwave tissue coagulator. Seven patients underwent hand-assisted laparoscopic procedure and 4 pure laparoscopic procedure.
Results: The mean tumor size on preoperative CT scan was 2.5 cm (range: 2.0 to 4.0 cm), the mean operative time was 307 minutes (range: 160 to 580 minutes), and the mean estimated blood loss was 154.4 ml (range: 50 to 1,140 ml). The microwave tissue coagulator well controlled the renal bleeding and maintained renal function. All patients safely underwent partial nephrectomy without inducing renal ischemia. A complication of urine leakage was recognized in only one patient with hypoproteinemia caused by nephrotic syndrome.
Conclusions: Laparoscopic partial nephrectomy using a microwave tissue coagulator was a useful method for achieving homeostasis, and was less invasive for treating small renal tumors.

Correspondence to Tsutomu Hamasaki, M.D. Ph.D., Department of Urology, Nippo Medical School, 1-1-5 Sendagi, Bunkyo-ku Tokyo 113-8602, Japan
hamasaki@nms.ac.jp

ArticleTitle	Laparoscopic Partial Nephrectomy Using a Microwave Tissue Coagulator for Treating Small Peripheral Renal Tumors
AuthorList	Tsutomu Hamasaki, Yukihiro Kondo, Ichiro Matuzawa, Narumi Tsuboi and Taiji Nishimura
Affiliation	Department of Urology, Nippon Medical School
Language	EN
Volume	71
Issue	6
Year	2004
Page	392-398
Received	July 2, 2004
Accepted	September 13, 2004
Keywords	renal cell carcinoma, partial nephrectomy, laparoscopic surgery, microwave tissue coagulator
Abstract	Background: Laparoscopic partial nephrectomy has been recently applied as a minimally invasive procedure. Several non-ischemic operation devices in partial nephrectomy have been developed. However, the problem related to maintenance of renal homeostasis remains. We investigated the efficacy and safety of a microwave tissue coagulator in laparoscopic partial nephrectomy. Methods: Between April 2001 and February 2003, eleven patients with small renal tumors underwent laparoscopic partial nephrectomy using a microwave tissue coagulator. Seven patients underwent hand-assisted laparoscopic procedure and 4 pure laparoscopic procedure. Results: The mean tumor size on preoperative CT scan was 2.5 cm (range: 2.0 to 4.0 cm), the mean operative time was 307 minutes (range: 160 to 580 minutes), and the mean estimated blood loss was 154.4 ml (range: 50 to 1,140 ml). The microwave tissue coagulator well controlled the renal bleeding and maintained renal function. All patients safely underwent partial nephrectomy without inducing renal ischemia. A complication of urine leakage was recognized in only one patient with hypoproteinemia caused by nephrotic syndrome. Conclusions: Laparoscopic partial nephrectomy using a microwave tissue coagulator was a useful method for achieving homeostasis, and was less invasive for treating small renal tumors.
Correspondence to	Tsutomu Hamasaki, M.D. Ph.D., Department of Urology, Nippo Medical School, 1-1-5 Sendagi, Bunkyo-ku Tokyo 113-8602, Japan hamasaki@nms.ac.jp