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Featured researches published by Masaru Iwasaki.


Archive | 1988

Fundamental Research in Laser Angioplasty (1): Effects of Nd:YAG, Argon-Ion and Excimer Lasers on Human Aortic Wall with or Without Atheromatous Plaque

Masaru Iwasaki; Kihachirou Kamiya; Akira Ueno

As the number of patients who have occlusive peripheral arterial disease grows, the clinical need of non-surgical treatments for this disorder is becoming stronger. In recent years, it has been reported that laser irradiation has the capability to vaporize and re-canalize occlusive lesions of a blood vessel [1–3]. Thus, angioplasty by laser has attracted considerable attention also in many countries, including ours.


Kanzo | 1988

Experimental studies of pulmonary edema in portal hypertention.

Nobutaka Umekita; Masaru Iwasaki; Kihachirou Kamiya; Akira Ueno

門脈圧亢進症に合併する肺浮腫が門脈血内の血管透過性物質の体循環への流入による肺血管透過性の亢進によって起こるのかを検討するため,ラットでEck瘻を作成しA群:Eck瘻開存群(n=8)B群:Eck痩閉塞群(n=9)C群:Sham手術群(n=6)の各群にわけ肺血管外水分量を測定した.肺血管外水分量/体重(ml/kg)はA群:2.02±0.27, B群:2.33±0.41*C群:1.84±0.16でありA, B群で増加したが,B群においてのみ有意であった.B群は門脈圧亢進状態にあり,部分的な門脈体循環短絡を形成していると考えられ,門脈体循環短絡量はA群がB群より多量であると考えられるが,B群の方が肺血管外水分量の増加が大きかったことは肺血管の透過性の亢進には門脈体循環短絡の存在とともに門脈圧亢進状態がなんらかの形で関与しているものと推測された.


Lasers in Surgery and Medicine | 1985

Nd-YAG laser for general surgery

Masaru Iwasaki; Mitsuru Sasako; Toshiro Konishi; Yuji Maruyama; Tatsuo Wada


Journal of Pediatric Surgery | 1988

Evaluation of lower esophageal sphincter function in infants and children following esophageal surgery

Kunio Takano; Makoto Iwafuchi; Masanori Uchiyama; Minoru Yagi; Akira Ueno; Masaru Iwasaki


山梨医科大学雑誌 | 1993

A Case of Giant Undifferentiated Sarcoma of the Liver with Marked Regression after Transarterial Chemoembolization

Hiroshi Nakagomi; Masatoshi Mogaki; Masaru Iwasaki; Kunio Takano; Kohzou Koshizuka; Hiroshi Ohsawa; Tomoo Miyake; Tetsunosuke Matsukawa; Takaya Nakane; Toshitugu Yamori; Akira Shimizu; Masatoshi Makuuchi; Akira Ueno


Nihon Rinsho Geka Gakkai Zasshi (journal of Japan Surgical Association) | 1993

A CASE OF COLONIC METASTASIS OF BREAST CANCER

Kozo Koshizuka; Keiji Iyori; Jun Hagihara; Kunio Takano; Masaru Iwasaki; Tetsunosuke Mastukawa


山梨医科大学雑誌 | 1992

Clinical Trial of Repetitive Portal Administration of Anticancer Drug as a Prophylactic Modality for Liver Metastasis - A Pilot Study of the Optimal Dosage and Reduced Toxicity -

Hiroshi Nakagomi; Masaru Iwasaki; Kunio Takano; Tetsunosuke Matsukawa; Akira Ueno; Nobutaka Umekita


山梨医科大学雑誌 | 1991

Seven Years' Experience with Cardiac Valve Surgery in Consecutive Patients over Sixty Years of Age

Tetsunosuke Matsukawa; Ryoichi Hashimoto; Shinpei Yoshii; Shigeru Hosaka; Hiroshi Nakagomi; Osamu Suzuki; Shoji Suzuki; Shunji Muto; Koichiro Nishida; Junya Kato; Shigeo Akimoto; Masaru Iwasaki; Kihachiro Kamiya; Akira Ueno


Surgical Laparoscopy Endoscopy & Percutaneous Techniques | 1991

An Experimental Study on the Cutting and Sealing Effects of the YAG Laser Bipolar Forceps on the Intra-abdominal Ductal Organs

Kozo Koshizuka; Masaru Iwasaki; Kouichirou Nishida; Tadao Ishimoto; Osamu Suzuki; Akira Ueno


Surgical Laparoscopy Endoscopy & Percutaneous Techniques | 1991

An Experimental Study on the Cutting and Sealing Effects of YAG Laser Bipolar Type Forceps on Lung Tissue

Tadao Ishimoto; Masaru Iwasaki; Kozo Koshizuka; Kunichirou Nishida; Osamu Suzuki; Shinpei Yoshii; Ryouichi Hashimoto; Tetunosuke Matsukawa; Akira Ueno

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Kunio Takano

University of Southern California

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