Kaj Johansen

6.9k total citations · 1 hit paper
110 papers, 4.9k citations indexed

About

Kaj Johansen is a scholar working on Surgery, Pulmonary and Respiratory Medicine and Epidemiology. According to data from OpenAlex, Kaj Johansen has authored 110 papers receiving a total of 4.9k indexed citations (citations by other indexed papers that have themselves been cited), including 76 papers in Surgery, 48 papers in Pulmonary and Respiratory Medicine and 30 papers in Epidemiology. Recurrent topics in Kaj Johansen's work include Vascular Procedures and Complications (19 papers), Aortic aneurysm repair treatments (18 papers) and Peripheral Artery Disease Management (16 papers). Kaj Johansen is often cited by papers focused on Vascular Procedures and Complications (19 papers), Aortic aneurysm repair treatments (18 papers) and Peripheral Artery Disease Management (16 papers). Kaj Johansen collaborates with scholars based in United States, Canada and Sweden. Kaj Johansen's co-authors include Sigvard T. Hansen, David L. Helfet, Stephen C. Nicholls, Michael Daines, Kim Lynch, Mark H. Meissner, Ted R. Kohler, Tom Howey, Robert D. Sanders and Alexander W. Clowes and has published in prestigious journals such as JAMA, Circulation and Hepatology.

In The Last Decade

Kaj Johansen

107 papers receiving 4.5k citations

Hit Papers

Objective Criteria Accurately Predict Amputation followin... 1990 2026 2002 2014 1990 100 200 300 400
What are hit papers?

Hit papers significantly outperform the citation benchmark for their cohort. A paper qualifies if it has ≥500 total citations, achieves ≥1.5× the top-1% citation threshold for papers in the same subfield and year (this is the minimum needed to enter the top 1%, not the average within it), or reaches the top citation threshold in at least one of its specific research topics.

  1. Objective Criteria Accurately Predict Amputation following Lower Extremity Trauma
    1990 468 citations Kaj Johansen, Sigvard T. Hansen et al. profile →

Peers — A (Enhanced Table)

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

Name h Career Trend Papers Cites
Kaj Johansen United States 36 3.2k 2.4k 1.3k 831 425 110 4.9k
Robert M. Filler Canada 48 4.6k 1.4× 2.9k 1.2× 691 0.5× 182 0.2× 624 1.5× 218 7.5k
Nancy D. Bridges United States 35 2.4k 0.7× 1.9k 0.8× 2.5k 1.9× 854 1.0× 113 0.3× 95 4.4k
I Gandjbakhch France 39 2.9k 0.9× 1.7k 0.7× 1.4k 1.1× 2.5k 3.1× 337 0.8× 308 5.5k
Raymond C. Read United States 35 2.2k 0.7× 1.3k 0.5× 374 0.3× 840 1.0× 239 0.6× 124 4.1k
Charles P. Semba United States 42 3.7k 1.2× 4.9k 2.1× 508 0.4× 1.9k 2.2× 92 0.2× 95 7.5k
John L. Ochsner United States 35 2.5k 0.8× 1.7k 0.7× 524 0.4× 1.1k 1.3× 304 0.7× 169 3.9k
Joseph J. Bookstein United States 38 2.0k 0.6× 1.6k 0.7× 354 0.3× 373 0.4× 85 0.2× 158 3.8k
Morris N. Kotler United States 39 1.9k 0.6× 1.3k 0.6× 1.2k 0.9× 3.8k 4.5× 130 0.3× 203 5.0k
Alan Daneman Canada 46 3.6k 1.1× 1.3k 0.6× 440 0.3× 261 0.3× 414 1.0× 226 6.2k
Scott J. Boley United States 40 4.5k 1.4× 1.7k 0.7× 741 0.6× 284 0.3× 337 0.8× 110 5.7k

Countries citing papers authored by Kaj Johansen

Since Specialization
Citations

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

Fields of papers citing papers by Kaj Johansen

Since Specialization
Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Kaj Johansen

This figure shows the co-authorship network connecting the top 25 collaborators of Kaj Johansen. A scholar is included among the top collaborators of Kaj Johansen 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 Kaj Johansen. Kaj Johansen 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.
Johansen, Kaj. (2020). Rib-sparing scalenectomy for neurogenic thoracic outlet syndrome: Early results. Journal of Vascular Surgery. 73(6). 2059–2063. 15 indexed citations
2.
Johansen, Kaj. (2019). Five Hundred Rib-Sparing Scalenectomies for the Treatment of Neurogenic Thoracic Outlet Syndrome. Journal of Vascular Surgery. 70(3). e83–e83. 2 indexed citations
3.
Illig, Karl A., Dean M. Donahue, Audra A. Duncan, et al.. (2016). Reporting standards of the Society for Vascular Surgery for thoracic outlet syndrome. Journal of Vascular Surgery. 64(3). e23–e35. 181 indexed citations
4.
McAteer, Jarod P., Robert L. Ricca, Kaj Johansen, & Adam B. Goldin. (2012). Extensive congenital abdominal aortic aneurysm and renovascular disease in the neonate. Journal of Vascular Surgery. 55(6). 1762–1765. 7 indexed citations
5.
Johansen, Kaj, et al.. (2008). Techniques in carotid artery surgery. Neurosurgical FOCUS. 24(2). E18–E18. 11 indexed citations
6.
Johansen, Kaj, et al.. (2003). Operative management of distal ischemia complicating upper extremity dialysis access. The American Journal of Surgery. 186(1). 17–19. 16 indexed citations
7.
Matsuura, John H., et al.. (2000). Cryopreserved Femoral Vein Grafts for Difficult Hemodialysis Access. Annals of Vascular Surgery. 14(1). 50–55. 38 indexed citations
8.
Nicholls, Stephen C., et al.. (1998). Rupture in small abdominal aortic aneurysms. Journal of Vascular Surgery. 28(5). 884–888. 204 indexed citations
9.
Johansen, Kaj, et al.. (1997). Portal Decompression Using the Inferior Mesenteric Vein. HPB Surgery. 10(6). 365–370. 10 indexed citations
10.
Johnson, M., Terry Gernsheimer, & Kaj Johansen. (1995). Essential thrombocytosis: Underemphasized cause of large-vessel thrombosis. Journal of Vascular Surgery. 22(4). 443–449. 29 indexed citations
11.
Johansen, Kaj, et al.. (1994). Biomaterials for Hemodialysis Access. Blood Purification. 12(1). 73–77. 2 indexed citations
12.
Anthony, Thomas & Kaj Johansen. (1994). Optimal outcome for “high-risk” carotid endarterectomy. The American Journal of Surgery. 167(5). 469–471. 11 indexed citations
13.
Johansen, Kaj & Sigvard T. Hansen. (1993). Symmetrical peripheral gangrene (purpura fulminans) complicating pneumococcal sepsis. The American Journal of Surgery. 165(5). 642–645. 88 indexed citations
14.
Johansen, Kaj, et al.. (1992). [Arteriosclerosis of the lower extremities--patients' contacts with alternative therapists].. PubMed. 154(24). 1709–11. 1 indexed citations
15.
Lynch, Kim & Kaj Johansen. (1991). Can Doppler Pressure Measurement Replace “Exclusion” Arteriography in the Diagnosis of Occult Extremity Arterial Trauma?. Annals of Surgery. 214(6). 737–742. 126 indexed citations
16.
Herman, Clifford M., et al.. (1990). St. Anthony's Fire: Successful Reversal of Ergotamine-Induced Peripheral Vasospasm by Hydrostatic Dilatation. Annals of Vascular Surgery. 4(6). 597–599. 13 indexed citations
17.
Johansen, Kaj & Marla Paun. (1990). Duplex Ultrasonography of the Portal Vein. Surgical Clinics of North America. 70(1). 181–190. 17 indexed citations
18.
Johansen, Kaj. (1989). Partial portal decompression for variceal hemorrhage. The American Journal of Surgery. 157(5). 479–482. 42 indexed citations
19.
Arneklo-Nobin, Birgitta, Lars Norgren, & Kaj Johansen. (1988). Beneficial effects of intra-arterial reserpine after upper-extremity embolectomy: A prospective randomised trial. European Journal of Vascular Surgery. 2(5). 305–308. 3 indexed citations
20.
DeLaria, Giacomo A., et al.. (1974). Reduction in myocardial ischemia by left ventricular bypass after acute coronary artery occlusion. Journal of Thoracic and Cardiovascular Surgery. 67(5). 826–837. 8 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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