Ryoji Ohi

3.2k total citations
111 papers, 2.3k citations indexed

About

Ryoji Ohi is a scholar working on Surgery, Pulmonary and Respiratory Medicine and Pediatrics, Perinatology and Child Health. According to data from OpenAlex, Ryoji Ohi has authored 111 papers receiving a total of 2.3k indexed citations (citations by other indexed papers that have themselves been cited), including 91 papers in Surgery, 43 papers in Pulmonary and Respiratory Medicine and 12 papers in Pediatrics, Perinatology and Child Health. Recurrent topics in Ryoji Ohi's work include Pediatric Hepatobiliary Diseases and Treatments (64 papers), Gallbladder and Bile Duct Disorders (35 papers) and Congenital Anomalies and Fetal Surgery (29 papers). Ryoji Ohi is often cited by papers focused on Pediatric Hepatobiliary Diseases and Treatments (64 papers), Gallbladder and Bile Duct Disorders (35 papers) and Congenital Anomalies and Fetal Surgery (29 papers). Ryoji Ohi collaborates with scholars based in Japan, United States and Italy. Ryoji Ohi's co-authors include Masaki Nio, Morio Kasai, Tsuneo Chiba, Yutaka Hayashi, Kōichi Tanaka, Kazuo Shiraki, Morihiro Saeki, Takeshi Miyano, Izumi Mochizuki and H. Sasaki and has published in prestigious journals such as American Journal of Clinical Nutrition, British Journal of Cancer and Transplantation.

In The Last Decade

Ryoji Ohi

110 papers receiving 2.2k citations

Peers

Countries citing papers authored by Ryoji Ohi

Since Specialization

Citations

This map shows the geographic impact of Ryoji Ohi's research. It shows the number of citations coming from papers published by authors working in each country. You can also color the map by specialization and compare the number of citations received by Ryoji Ohi with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Ryoji Ohi more than expected).

Fields of papers citing papers by Ryoji Ohi

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Ryoji Ohi. Nodes represent research fields, and links connect fields that are likely to share authors. Colored nodes show fields that tend to cite the papers produced by Ryoji Ohi. The network helps show where Ryoji Ohi may publish in the future.

Co-authorship network of co-authors of Ryoji Ohi

This figure shows the co-authorship network connecting the top 25 collaborators of Ryoji Ohi. A scholar is included among the top collaborators of Ryoji Ohi based on the total number of citations received by their joint publications. Widths of edges represent the number of papers authors have co-authored together. Node borders signify the number of papers an author published with Ryoji Ohi. Ryoji Ohi is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

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20 of 20 papers shown

#	Work	Indexed citations
1	Biliary atresia with associated complicated anorectal and urogenital malformations 2004 ·Pediatric Surgery International ·Shintaro Amae, Takamichi Kamiyama, Masaki Nio, Shigehiko Yoshida, Yutaka Hayashi, (unknown), Ryoji Ohi	4
2	Postoperative corticosteroid therapy for bile drainage in biliary atresia—a nationwide survey 2004 ·Journal of Pediatric Surgery ·Toshihiro Muraji, Masaki Nio, Youkatsu Ohhama, Takashi Hashimoto, Tadashi Iwanaka, Hideo Takamatsu, Naomi Ohnuma, Tetsuo Kato, Ryoji Ohi	41
3	Serum insulinlike growth factor-I in biliary atresia 2003 ·Journal of Pediatric Surgery ·Shigehiko Yoshida, Masaki Nio, Yutaka Hayashi, Ryoji Ohi, Ikuo Kawamura, Toshio Goto	12
4	Clinical significance of 99mTc-DTPA-galactosyl human serum albumin liver scintigraphy in follow-up patients with biliary atresia 2003 ·Journal of Pediatric Surgery ·Tomohiro Ishii, Masaki Nio, Satoru Shimaoka, (unknown), H. Sasaki, Dai Kimura, Yutaka Hayashi, Ryoji Ohi	6
5	A Newly Developed Small-Caliber Videoduodenoscope for Endoscopic Retrograde Cholangiopancreatography in Children 2003 ·Journal of Clinical Gastroenterology ·Seiichi Kato, Shoichiro Kamagata, Tohru Asakura, Kyoko Ozawa, Masaki Nio, Ryoji Ohi, Mitsutoshi Munakata, Kazuie Iinuma	5
6	Five- and 10-year survival rates after surgery for biliary atresia: a report from the Japanese biliary atresia registry 2003 ·Journal of Pediatric Surgery ·Masaki Nio, Ryoji Ohi, Takeshi Miyano, Morihiro Saeki, Kazuo Shiraki, Kōichi Tanaka	248
7	Clinical characteristics and management of congenital esophageal stenosis: A report on 14 cases 2003 ·Journal of Pediatric Surgery ·Shintaro Amae, Masaki Nio, Takamichi Kamiyama, Tomohiro Ishii, Shigehiko Yoshida, Yutaka Hayashi, Ryoji Ohi	54
8	Expression of the co-stimulatory molecule CD80 (B7-1) in a porcine intestinal graft 2002 ·Transplantation Proceedings ·Motoshi Wada, Shintaro Amae, (unknown), Tomonori Ishii, H. Sasaki, (unknown), Masaki Nio, (unknown), Ryoji Ohi	2
9	Development of an Implantable Artificial Anal Sphincter by the Use of the Shape Memory Alloy 2001 ·ASAIO Journal ·Shintaro Amae, Motoshi Wada, Yun Luo, Hirokazu Nakamura, Shigehiko Yoshida, Takamichi Kamiyama, Tomoyuki Yambe, Toshiyuki Takagi, (unknown), Ryoji Ohi	26
10	In situ CD14 expression in biliary atresia: Comparison between early and late stages 2001 ·Journal of Pediatric Surgery ·(unknown), Masaki Nio, Haruo Ohtani, Hiroshi Nagura, Ryoji Ohi	16
11	BILIARY ATRESIA 2000 ·Clinics in Liver Disease ·Ryoji Ohi	40
12	Detailed deletion mapping of chromosome band 14q32 in human neuroblastoma defines a 1.1-Mb region of common allelic loss 2000 ·British Journal of Cancer ·Masato Hoshi, (unknown), Hiroki Shiwaku, Shuichi Asakawa, Nobutaka Shimizu, Yasuhiko Kaneko, Ryoji Ohi, Yutaka Hayashi, Akira Horii	28
13	Apoptosis and cell proliferation in biliary atresia 1998 ·The Journal of Pathology ·(unknown), Hironobu Sasano, (unknown), (unknown), (unknown), Ryoji Ohi, Hiroshi Nagura	42
14	The structure of the transitional and aganglionic zones of Auerbach's plexus in patients with Hirschsprung's disease: A computer-assisted three-dimensional reconstruction study 1996 ·Journal of Pediatric Surgery ·(unknown), Ryoji Ohi, (unknown), Tohru Takahashi	14
15	Postoperative Intrahepatic Cholelithiasis in a Male With Biliary Atresia 1992 ·Tsuneo Chiba, Ryoji Ohi, Masaki Nio, Shigehiko Yoshida, (unknown)	2
16	Effectiveness and Pharmacokinetics of Omeprazole in Children with Refractory Duodenal Ulcer 1992 ·Journal of Pediatric Gastroenterology and Nutrition ·Seiichi Kato, (unknown), Yutaka Hayashi, (unknown), Hiroshi Nakagawa, Ryoji Ohi	3
17	Long-term follow-up after surgery for patients with biliary atresia 1990 ·Journal of Pediatric Surgery ·Ryoji Ohi, Masaki Nio, Tsuneo Chiba, Naobumi Endo, Makoto Goto, Mohamed M. Ibrahim	93
18	Fall and Rise Variations of Serum GGTP in Preoperative Infants with Biliary Atresia 1990 ·Journal of Pediatric Gastroenterology and Nutrition ·Yusaku Tazawa, Michiko Nakagawa, Daiki Abukawa, (unknown), K. Tada, Ryoji Ohi, Tasuke Konno	1
19	Anorectal Motility After Rectal Myectomy in Patients with Hirschsprung’s Disease 1989 ·PubMed ·Ryoji Ohi, Katsuko Komatsu	4
20	The Intrahepatic Vascular changes in Congenital Biliary Atresia 1976 ·Atsutake Okamoto, Ryoji Ohi, Itaru Watanabe, Hiroshi Suzuki, Morio Kasai	1

Rankless uses publication and citation data sourced from OpenAlex, an open and comprehensive bibliographic database. While OpenAlex provides broad and valuable coverage of the global research landscape, it—like all bibliographic datasets—has inherent limitations. These include incomplete records, variations in author disambiguation, differences in journal indexing, and delays in data updates. As a result, some metrics and network relationships displayed in Rankless may not fully capture the entirety of a scholar's output or impact.

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