Hitoshi Okawara
Oita University
Network
Latest external collaboration on country level. Dive into details by clicking on the dots.
Publication
Featured researches published by Hitoshi Okawara.
Gastrointestinal Endoscopy | 2010
Yoshifumi Nakagawa; Takayuki Nagai; Wataru Soma; Hitoshi Okawara; Hiroshi Nakashima; Takako Tasaki; Akari Hisamatu; Masahiko Hashinaga; Kazunari Murakami; Toshio Fujioka
An 88-year-old man with recurrent obstructive jaundice esulting from common bile duct cancer underwent ERCP. he patient’s medical history included a cholecystectomy years earlier and 4 episodes of obstructive jaundice ecause of biliary stent occlusion. At insertion of a duoenoscope into the duodenum, a perforation measuring bout 30 mm occurred in the lateral wall of the descending uodenum (Fig. 1A). The patient was inoperable because f advanced age and comorbidities. After informed conent was obtained, we tried endoscopic repair of this erforation. Closure with endoclips alone failed because he hole was too large. We decided to close the perforaion with endoloops (MAJ-254; Olympus Optical Co Ltd, okyo, Japan) and endoclips (HX-610-090; Olympus) by sing a 2-channel endoscope (GIF-2TQ260M; Olympus) ith a distal attachment (disposable distal attachment, -201-13404; Olympus). The 2-channel endoscope alowed simultaneous insertion of an endoloop and an enoclip applicator device (HX-110QR/HX-610-090; Olymus). By using the endoclip, we anchored the endoloop
Esophagus | 2011
Yoshifumi Nakagawa; Akira Yokoyama; Takayuki Nagai; Hitoshi Okawara; Hiroshi Nakashima; Kayo Soga; Kazunari Murakami; Toshio Fujioka; Yoshiya Kumagai; Masako Yokoyama; Tetsuji Yokoyama
BackgroundMany environmental and genetic factors are presumed to be involved in the etiology of esophageal squamous cell carcinoma (ESCC). We developed a health risk appraisal model that includes an alcohol flushing questionnaire (HRA-F) to estimate the ESCC risk. The purpose of this study was to use the HRA-F model to assess regional differences in the ESCC risk between rural and urban regions in Japan.MethodsWe compared the HRA-F scores for risk of ESCC of 1,043 medical screening examinees (442 men and 601 women) in a rural region of Oita Prefecture and 1,016 medical screening examinees (610 men and 406 women) in a central region of Tokyo, Japan.ResultsAfter adjustment for age, there was no difference between the frequencies of current or former facial flushers in the two populations. Oita men consumed more alcohol than Tokyo men, but Oita women consumed less alcohol than Tokyo women. There was no difference between Oita and Tokyo in the suppressive effect of flushing on alcohol consumption. Oita individuals of both genders reported less smoking, lower green and yellow vegetable intake, and lower fruit intake than did Tokyo individuals. The risk of ESCC quantitatively assessed based on the HRA-F scores was higher in Oita men than in Tokyo men, but a higher proportion of women were at high risk in Tokyo than in Oita.ConclusionThe HRA-F model was useful for identifying regional differences in ESCC risk and persons at high risk of ESCC in the Japanese population.
Internal Medicine | 2004
Takayuki Nagai; Ryutaro Torishima; Akihiro Uchida; Hiroshi Nakashima; Kenji Takahashi; Hitoshi Okawara; Masatoshi Oga; Koji Suzuki; Shinji Miyamoto; Ryugo Sato; Kazunari Murakami; Toshio Fujioka
Internal Medicine | 2010
Akari Hisamatsu; Takayuki Nagai; Hitoshi Okawara; Hiroshi Nakashima; Takako Tasaki; Yoshifumi Nakagawa; Masahiko Hashinaga; Shunichi Kai; Shigeo Yokoyama; Kazunari Murakami; Toshio Fujioka
Internal Medicine | 2004
Takayuki Nagai; Ryutarou Torishima; Hiroshi Nakashima; Akihiro Uchida; Hitoshi Okawara; Koji Suzuki; Ryugo Sato; Kazunari Murakami; Toshio Fujioka
Internal Medicine | 2009
Takashi Abe; Takayuki Nagai; Kazunari Murakami; Juro Anan; Masahiro Uchida; Hideki Ono; Hitoshi Okawara; Jin Tanahashi; Tadayoshi Okimoto; Masaaki Kodama; Toshio Fujioka
Internal Medicine | 2009
Yoshifumi Nakagawa; Takayuki Nagai; Hitoshi Okawara; Hiroshi Nakashima; Takako Tasaki; Wataru Soma; Akari Hisamatsu; Masahide Watada; Kazunari Murakami; Toshio Fujioka
Endoscopy | 2009
Yoshifumi Nakagawa; Takayuki Nagai; Hitoshi Okawara; Hiroshi Nakashima; Takako Tasaki; Wataru Soma; A. Hisamatu; J. Anan; K. Murakami; Toshio Fujioka
Internal Medicine | 2013
Takashi Abe; Takayuki Nagai; Junji Fukunaga; Hitoshi Okawara; Hiroshi Nakashima; Mitsutaka Syutou; Nobuaki Kajimoto; Ryojin Wake; Tsuneo Oyama; Takashi Yao
Endoscopy | 2011
Yoshifumi Nakagawa; Takayuki Nagai; Hitoshi Okawara; Hiroshi Nakashima; Akari Hisamatsu; Mitsutaka Shuto; M. Yamauchi; Shunichi Kai; Shigeyuki Yokoyama; K. Murakami; Toshio Fujioka