Kouhei Nii

911 total citations
76 papers, 550 citations indexed

About

Kouhei Nii is a scholar working on Neurology, Pulmonary and Respiratory Medicine and Epidemiology. According to data from OpenAlex, Kouhei Nii has authored 76 papers receiving a total of 550 indexed citations (citations by other indexed papers that have themselves been cited), including 51 papers in Neurology, 39 papers in Pulmonary and Respiratory Medicine and 26 papers in Epidemiology. Recurrent topics in Kouhei Nii's work include Intracranial Aneurysms: Treatment and Complications (42 papers), Cerebrovascular and Carotid Artery Diseases (35 papers) and Acute Ischemic Stroke Management (20 papers). Kouhei Nii is often cited by papers focused on Intracranial Aneurysms: Treatment and Complications (42 papers), Cerebrovascular and Carotid Artery Diseases (35 papers) and Acute Ischemic Stroke Management (20 papers). Kouhei Nii collaborates with scholars based in Japan and United States. Kouhei Nii's co-authors include Kiyoshi Kazekawa, Hiroshi Aikawa, Masanori Tsutsumi, Minoru Iko, Masanari Onizuka, Kimiya Sakamoto, Tomonobu Kodama, Akira Tanaka, Masahiro Tsutsumi and Yoshihisa Matsumoto and has published in prestigious journals such as Neurosurgery, Medicine and American Journal of Neuroradiology.

In The Last Decade

Kouhei Nii

65 papers receiving 536 citations

Peers — A (Enhanced Table)

Peers by citation overlap · career bar shows stage (early→late) cites · hero ref

Name h Career Trend Papers Cites
Kouhei Nii Japan 14 375 363 198 126 85 76 550
Kimiya Sakamoto Japan 11 196 0.5× 156 0.4× 114 0.6× 85 0.7× 43 0.5× 57 326
Rob Lo Netherlands 14 396 1.1× 368 1.0× 196 1.0× 145 1.2× 49 0.6× 21 607
Sudhakar R Satti United States 14 280 0.7× 517 1.4× 172 0.9× 53 0.4× 49 0.6× 34 764
Lucy J. Coward United Kingdom 5 453 1.2× 334 0.9× 314 1.6× 231 1.8× 53 0.6× 6 542
Laura Renon Italy 11 439 1.2× 216 0.6× 179 0.9× 234 1.9× 22 0.3× 16 490
Hidetoshi Matsukawa Japan 17 364 1.0× 694 1.9× 226 1.1× 30 0.2× 155 1.8× 73 748
D Georgiadis United Kingdom 8 249 0.7× 199 0.5× 135 0.7× 77 0.6× 43 0.5× 8 341
Robert Tarr United States 10 254 0.7× 360 1.0× 342 1.7× 31 0.2× 29 0.3× 18 605
Fiona Kennedy United Kingdom 7 273 0.7× 191 0.5× 202 1.0× 144 1.1× 30 0.4× 17 402
Hisashi Nagashima Japan 12 256 0.7× 368 1.0× 94 0.5× 20 0.2× 80 0.9× 46 527

Countries citing papers authored by Kouhei Nii

Since Specialization
Citations

This map shows the geographic impact of Kouhei Nii'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 Kouhei Nii with the expected number of citations based on a country's size and research output (numbers larger than one mean the country cites Kouhei Nii more than expected).

Fields of papers citing papers by Kouhei Nii

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

This network shows the impact of papers produced by Kouhei Nii. 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 Kouhei Nii. The network helps show where Kouhei Nii may publish in the future.

Co-authorship network of co-authors of Kouhei Nii

This figure shows the co-authorship network connecting the top 25 collaborators of Kouhei Nii. A scholar is included among the top collaborators of Kouhei Nii 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 Kouhei Nii. Kouhei Nii is excluded from the visualization to improve readability, since they are connected to all nodes in the network.

All Works

20 of 20 papers shown
1.
Nii, Kouhei, et al.. (2024). Efficacy and Safety of a New Delivery Assist Catheter with a Flexible, Spindle-Shaped Shaft in Mechanical Thrombectomy. World Neurosurgery. 187. e997–e1003. 3 indexed citations
2.
Nii, Kouhei, et al.. (2023). Analysis of Cerebrovascular Events after Coil Embolization of Unruptured Cerebral Aneurysms in Patients Taking Anticoagulants. Journal of Neuroendovascular Therapy. 17(3). 73–79.
3.
Nii, Kouhei, et al.. (2020). Safety of direct oral anticoagulant - and antiplatelet therapy in patients with atrial fibrillation treated by carotid artery stenting. Journal of Stroke and Cerebrovascular Diseases. 29(7). 104899–104899. 10 indexed citations
4.
Abe, Ichiro, Yusuke Ueda, Kouhei Nii, et al.. (2019). A case of drug-induced hypersensitivity syndrome induced by salazosulfapyridine combined with SIADH caused by interstitial pneumonia. Drug Discoveries & Therapeutics. 13(4). 232–238. 7 indexed citations
5.
Nii, Kouhei, et al.. (2019). Case of Acromegaly Caused by Rathke Cleft Cyst Mimicking Plurihormonal Pituitary Adenoma. World Neurosurgery. 126. 570–575.
6.
7.
Matsumoto, Yoshihisa, Minoru Iko, Masanori Tsutsumi, et al.. (2015). The Safety and Efficacy of Triple Antiplatelet Therapy after Intracranial Stent-Assisted Coil Embolization. Journal of Stroke and Cerebrovascular Diseases. 24(7). 1513–1519. 9 indexed citations
8.
9.
Tsutsumi, Masanori, Minoru Iko, Kimiya Sakamoto, et al.. (2014). Safety and Efficacy of Ozagrel Sodium in Stent-assisted Coil Embolization of Acutely Ruptured Cerebral Aneurysms. Surgery for Cerebral Stroke. 42(2). 81–88.
10.
Nii, Kouhei, Kanji Nakai, Masanori Tsutsumi, et al.. (2014). A Manual Carotid Compression Technique to Overcome Difficult Filter Protection Device Retrieval during Carotid Artery Stenting. Journal of Stroke and Cerebrovascular Diseases. 24(1). 210–214. 6 indexed citations
11.
Iko, Minoru, Masanori Tsutsumi, Hiroshi Aikawa, et al.. (2012). Distal protection filter device efficacy with carotid artery stenting: comparison between a distal protection filter and a distal protection balloon. Japanese Journal of Radiology. 31(1). 45–49. 9 indexed citations
12.
Nii, Kouhei, et al.. (2011). Incidence of Hemodynamic Depression After Carotid Artery Stenting Using Different Self-Expandable Stent Types. Neurologia medico-chirurgica. 51(8). 556–560. 15 indexed citations
13.
Narita, Sumito, Hiroshi Aikawa, Masanori Tsutsumi, et al.. (2011). Intraprocedural Prediction of Hemorrhagic Cerebral Hyperperfusion Syndrome After Carotid Artery Stenting. Journal of Stroke and Cerebrovascular Diseases. 22(5). 615–619. 23 indexed citations
14.
Aikawa, Hiroshi, Kiyoshi Kazekawa, Masanori Tsutsumi, et al.. (2010). Intraprocedural Changes in Angiographic Cerebral Circulation Time Predict Cerebral Blood Flow After Carotid Artery Stenting. Neurologia medico-chirurgica. 50(4). 269–274. 17 indexed citations
15.
16.
Tsutsumi, Masanori, Hiroshi Aikawa, Masanari Onizuka, et al.. (2008). Endovascular treatment of tiny ruptured anterior communicating artery aneurysms. Neuroradiology. 50(6). 509–515. 27 indexed citations
17.
Matsubara, Shyuichiro, Kiyoshi Kazekawa, Hiroshi Aikawa, et al.. (2007). Direct Superficial Temporal Vein Approach for Dural Carotid Cavernous Fistula. Interventional Neuroradiology. 13(1_suppl). 64–67. 7 indexed citations
18.
Onizuka, Masanari, Kiyoshi Kazekawa, Masahiro Tsutsumi, et al.. (2006). The significance of incomplete stent apposition in patients undergoing stenting of internal carotid artery stenosis.. American Journal of Neuroradiology. 27(7). 1505–7. 8 indexed citations
19.
Tsutsumi, Masanori, Kiyoshi Kazekawa, Masanari Onizuka, et al.. (2006). Stent fracture in revascularization for symptomatic ostial vertebral artery stenosis. Neuroradiology. 49(3). 253–257. 36 indexed citations
20.
Nii, Kouhei, Kiyoshi Kazekawa, Masanari Onizuka, et al.. (2006). Direct carotid puncture for the endovascular treatment of anterior circulation aneurysms.. American Journal of Neuroradiology. 27(7). 1502–4. 51 indexed citations

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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