Ingvar Bjarnason

15.5k total citations · 3 hit papers
181 papers, 11.7k citations indexed

About

Ingvar Bjarnason is a scholar working on Surgery, Pharmacology and Epidemiology. According to data from OpenAlex, Ingvar Bjarnason has authored 181 papers receiving a total of 11.7k indexed citations (citations by other indexed papers that have themselves been cited), including 73 papers in Surgery, 70 papers in Pharmacology and 51 papers in Epidemiology. Recurrent topics in Ingvar Bjarnason's work include Inflammatory mediators and NSAID effects (65 papers), Helicobacter pylori-related gastroenterology studies (47 papers) and Microscopic Colitis (37 papers). Ingvar Bjarnason is often cited by papers focused on Inflammatory mediators and NSAID effects (65 papers), Helicobacter pylori-related gastroenterology studies (47 papers) and Microscopic Colitis (37 papers). Ingvar Bjarnason collaborates with scholars based in United Kingdom, United States and Iceland. Ingvar Bjarnason's co-authors include Andrew J. Macpherson, Jeremy Hayllar, A J Levi, Daniel Hollander, T. B. Peters, Paul Smethurst, G Sigthorsson, Atlanta Russell, T. J. Peters and I Forgács and has published in prestigious journals such as The Lancet, SHILAP Revista de lepidopterología and Gastroenterology.

In The Last Decade

Ingvar Bjarnason

179 papers receiving 11.3k citations

Hit Papers

align trajectories

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.

Side effects of nonsteroidal anti-inflammatory drugs on the small and large intestine in humans

1993 792 citations Ingvar Bjarnason, Jeremy Hayllar et al. Gastroenterology profile →
Intestinal permeability: An overview

1995 760 citations Ingvar Bjarnason, Andrew J. Macpherson et al. Gastroenterology profile →
Mechanisms of Damage to the Gastrointestinal Tract From Nonsteroidal Anti-Inflammatory Drugs

2017 359 citations Ingvar Bjarnason, Carmelo Scarpignato et al. Gastroenterology profile →

Peers

Countries citing papers authored by Ingvar Bjarnason

Since Specialization

Citations

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

Fields of papers citing papers by Ingvar Bjarnason

Since Specialization

Physical SciencesHealth SciencesLife SciencesSocial Sciences

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

Co-authorship network of co-authors of Ingvar Bjarnason

This figure shows the co-authorship network connecting the top 25 collaborators of Ingvar Bjarnason. A scholar is included among the top collaborators of Ingvar Bjarnason 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 Ingvar Bjarnason. Ingvar Bjarnason 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	A randomised, double-blind, placebo-controlled trial of a multi-strain probiotic in patients with asymptomatic ulcerative colitis and Crohn’s disease 2019 ·Inflammopharmacology ·Ingvar Bjarnason, (unknown), Bu Hayee	145
2	Drug-Induced Small Bowel Injury: a Challenging and Often Forgotten Clinical Condition 2019 ·Current Gastroenterology Reports ·Carmelo Scarpignato, Ingvar Bjarnason	33
3	AWE-08 Why are we missing colorectal cancer? A study investigating the cause of delays in diagnosis 2019 ·Brian Hayes, Ingvar Bjarnason, Robert Logan, Bu Hayee, P Dubois, Amyn Haji, (unknown), (unknown), Rajaventhan Srirajaskanthan, (unknown)	3
4	Differing disintegration and dissolution rates, pharmacokinetic profiles and gastrointestinal tolerability of over the counter ibuprofen formulations 2017 ·Journal of Pharmacy and Pharmacology ·Ingvar Bjarnason, (unknown), (unknown), (unknown), Ángel Lanas	5
5	The natural history of perianal disease 2011 ·Gut ·Bu Hayee, (unknown), Misha Kabir, Savvas Papagrigoriadis, (unknown), Ingvar Bjarnason, I Forgács	1
6	Selective inhibition of COX-2 in humans is associated with less gastrointestinal injury: a comparison of nimesulide and naproxen 2001 ·Gut ·(unknown), Bjarni Þjóðleifsson, Frank E. Murray, E. Kay, Mary Barry, G Sigthorsson, H Gudjónsson, Einar Oddsson, Ashley B. Price, Desmond J. Fitzgerald, Ingvar Bjarnason	84
7	COX-2 inhibitors and the gastrointestinal tract 2001 ·Gut ·Ingvar Bjarnason, (unknown)	8
8	Small intestinal transit, absorption, and permeability in patients with AIDS with and without diarrhoea 1999 ·Gut ·D Sharpstone, Penny Neild, R Crane, Chris Taylor, Carol Hodgson, Roy Sherwood, Brian Gazzard, Ingvar Bjarnason	107
9	The effect of tacrolimus (FK506) on intestinal barrier function and cellular energy production in humans 1998 ·Gastroenterology ·Simon Gabe, Ingvar Bjarnason, Zahra Tolou–Ghamari, J. Michael Tredger, (unknown), G R Barclay, Roger Williams, D. B. A. Silk	136
10	Enantiomers of flurbiprofen can distinguish key pathophysiological steps of NSAID enteropathy in the rat 1998 ·Gut ·Taifo Mahmud, Siva G. Somasundaram, G Sigthorsson, Robert J. Simpson, S Rafi, R G Foster, I A Tavares, Arne Røseth, A. J. Hutt, Mohan V. Jacob, (unknown), David L. Scott, John M. Wrigglesworth, Ingvar Bjarnason	30
11	Mitochondrial damage: a possible mechanism of the “topical” phase of NSAID induced injury to the rat intestine 1997 ·Gut ·Siva G. Somasundaram, S Rafi, Jeremy Hayllar, G Sigthorsson, Mohan V. Jacob, Ashley B. Price, Andrew J. Macpherson, (unknown), David L. Scott, John M. Wrigglesworth, Ingvar Bjarnason	279
12	Reduced bone density in patients with inflammatory bowel disease. 1997 ·Gut ·Ingvar Bjarnason, Andrew J. Macpherson, (unknown), M. Buxton‐Thomas, I Forgács, Caje Moniz	293
13	Antibodies to colonic epithelial cells from the serum and colonic mucosal washings in ulcerative colitis. 1995 ·Gut ·(unknown), Ingvar Bjarnason, Anthony J. Donaghy, Roger W. Williams, A. MacPherson	11
14	Intestinal absorptive capacity, intestinal permeability and jejunal histology in HIV and their relation to diarrhoea. 1995 ·Gut ·J. J. Keating, Ingvar Bjarnason, Siva G. Somasundaram, Andrew J. Macpherson, N. Francis, (unknown), D Sharpstone, (unknown), I. S. Menzies, Brian Gazzard	113
15	Metronidazole reduces intestinal inflammation and blood loss in non-steroidal anti-inflammatory drug induced enteropathy. 1992 ·Gut ·Ingvar Bjarnason, Jeremy Hayllar, Paul Smethurst, David Price, M Gumpel	148
16	Elemental diet in the management of Crohn's disease during pregnancy. 1991 ·Gut ·K Teahon, Morag Pearson, A J Levi, Ingvar Bjarnason	18
17	Importance of local versus systemic effects of non-steroidal anti-inflammatory drugs in increasing small intestinal permeability in man. 1991 ·Gut ·Ingvar Bjarnason, (unknown), Paul Smethurst, I. S. Menzies, A J Levi	101
18	Studies of intestinal lymphoid tissue. XIV--HLA status, mucosal morphology, permeability and epithelial lymphocyte populations in first degree relatives of patients with coeliac disease. 1990 ·Gut ·Michael N. Marsh, Ingvar Bjarnason, Jonathan E. Shaw, Anthony Ellis, (unknown), Timothy J. Peters	57
19	Treatment of non-steroidal anti-inflammatory drug induced enteropathy. 1990 ·Gut ·Ingvar Bjarnason, Neil Hopkinson, G.D. Zanelli, P. Prouse, Paul Smethurst, J M Gumpel, A J Levi	49
20	Effect of non-steroidal anti-inflammatory drugs and prostaglandins on the permeability of the human small intestine. 1986 ·Gut ·Ingvar Bjarnason, Peter Williams, Paul Smethurst, Timothy J. Peters, A J Levi	218

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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