Publications 2023

Hole MJ, Jørgensen KK, Holm K, Braadland PR, Meyer-Myklestad MH, Medhus AW, Reikvam DH, Götz A, Grzyb K, Boberg KM, Karlsen TH, Kummen M, Hov JR (2023)
A shared mucosal gut microbiota signature in primary sclerosing cholangitis before and after liver transplantation
Hepatology, 77 (3), 715-728
DOI 10.1002/hep.32773, PubMed 36056902

Hole MJ, Jørgensen KK, Holm K, Braadland PR, Meyer-Myklestad MH, Medhus AW, Reikvam DH, Götz A, Grzyb K, Boberg KM, Karlsen TH, Kummen M, Hov JR (2023)
Reply: The mucosal gut signature in primary sclerosing cholangitis before and after liver transplantation. Is the dysbiosis index really predictive for the recurrence of PSC?
Hepatology, 77 (6), E188-E189
DOI 10.1097/HEP.0000000000000340, PubMed 36815351

Holten KA, Bernklev T, Opheim R, Johansen I, Olsen BC, Lund C, Strande V, Medhus AW, Perminow G, Bengtson MB, Cetinkaya RB, Vatn S, Frigstad SO, Aabrekk TB, Detlie TE, Hovde Ø, Kristensen VA, Milada SC, Henriksen M, Huppertz-Hauss G, Høivik ML, Jelsness-Jørgensen LP (2023)
Fatigue in patients with newly diagnosed inflammatory bowel disease: Results from a prospective inception cohort, the IBSEN III study
J Crohns Colitis (in press)
DOI 10.1093/ecco-jcc/jjad094, PubMed 37279652

Jørgensen KK, Høivik ML, Chopra A, Benth JŠ, Ricanek P, Moum PB, Jyssum I, Bolstad N, Warren DJ, Vaage PJT, Munthe PLA, Lundin PKEA, Anisdahl K, Syversen SW, Goll GL, Lund-Johansen F, Medhus AW, Jahnsen PJ (2023)
Humoral immune response to SARS-CoV-2 vaccination in patients with inflammatory bowel disease on immunosuppressive medication: association to serum drug levels and disease type
Scand J Gastroenterol, 58 (8), 874-882
DOI 10.1080/00365521.2023.2177884, PubMed 36788656

Svanevik M, Lorentzen J, Borgeraas H, Sandbu R, Seip B, Medhus AW, Hertel JK, Kolotkin RL, Småstuen MC, Hofsø D, Hjelmesæth J (2023)
Patient-reported outcomes, weight loss, and remission of type 2 diabetes 3 years after gastric bypass and sleeve gastrectomy (Oseberg); a single-centre, randomised controlled trial
Lancet Diabetes Endocrinol, 11 (8), 555-566
DOI 10.1016/S2213-8587(23)00127-4, PubMed 37414071

Tran TT, Vaage EB, Mehta A, Chopra A, Tietze L, Kolderup A, Anthi A, König M, Nygaard G, Lind A, Müller F, Nissen-Meyer LS, Magnus P, Trogstad L, Mjaaland S, Søraas A, Midtvedt K, Åsberg A, Barratt-Due A, Medhus AW, Høivik ML, Lundin K, Karlsen RF, Dahle R, Danielsson K et al. (2023)
Author Correction: Titers of antibodies against ancestral SARS-CoV-2 correlate with levels of neutralizing antibodies to multiple variants
NPJ Vaccines, 8 (1), 4
DOI 10.1038/s41541-023-00600-6, PubMed 36697432

Wiken TH, Høivik ML, Buer L, Warren DJ, Bolstad N, Moum BA, Anisdahl K, Småstuen MC, Medhus AW (2023)
Switching from intravenous to subcutaneous vedolizumab maintenance treatment in patients with inflammatory bowel disease followed by therapeutic drug monitoring
Scand J Gastroenterol, 58 (8), 863-873
DOI 10.1080/00365521.2023.2176252, PubMed 36799155

Publications 2022

Evensen H, Hjermstad MJ, Cvancarova M, Kristensen V, Larssen L, Skattum J, Hauge T, Sandstad O, Medhus AW (2022)
Quality of life in patients with achalasia: Associations with Eckardt score and objective treatment outcomes after peroral endoscopic myotomy
Endosc Int Open, 10 (12), E1570-E1576
DOI 10.1055/a-1968-7682, PubMed 36531682

Kazmi SSH, Safi N, Berge ST, Kazmi M, Sundhagen JO, Julien K, Thorsby PM, Ånonsen KV, Medhus AW, Hisdal J (2022)
Plasma α-Glutathione S-Transferase in Patients with Chronic Mesenteric Ischemia and Median Arcuate Ligament Syndrome
Vasc Health Risk Manag, 18, 567-574
DOI 10.2147/VHRM.S365625, PubMed 35903288

Lorentzen J, Medhus AW, Hofsø D, Svanevik M, Seip B, Hjelmesæth J (2022)
Letter to the Editor regarding the article «Gerd symptoms after laparoscopic Roux-en-Y gastric bypass: an emerging scenario» by Antonella Santonicola, Luigi Ruggiero, Rossella Palma, Luigi Angrisani and Paola Iovino. International Journal of Obesity (2022) 46:1076-1078
Int J Obes (Lond), 46 (10), 1936-1937
DOI 10.1038/s41366-022-01200-5, PubMed 35933446

Meyer-Myklestad MH, Medhus AW, Lorvik KB, Seljeflot I, Hansen SH, Holm K, Stiksrud B, Trøseid M, Hov JR, Kvale D, Dyrhol-Riise AM, Kummen M, Reikvam DH (2022)
Human Immunodeficiency Virus-Infected Immunological Nonresponders Have Colon-Restricted Gut Mucosal Immune Dysfunction
J Infect Dis, 225 (4), 661-674
DOI 10.1093/infdis/jiaa714, PubMed 33216130

Meyer-Myklestad MH, Medhus AW, Stiksrud B, Lorvik KB, Seljeflot I, Hansen SH, Holm K, Hov JR, Kvale D, Dyrhol-Riise AM, Kummen M, Trøseid M, Reikvam DH (2022)
Probiotics to HIV-Infected Immunological Nonresponders: Altered Mucosal Immunity and Microbial Diversity Restricted to Ileum
J Acquir Immune Defic Syndr, 89 (1), 77-86
DOI 10.1097/QAI.0000000000002817, PubMed 34878437

Safi N, Ånonsen KV, Berge ST, Medhus AW, Sundhagen JO, Hisdal J, Kazmi SSH (2022)
Early Identification of Chronic Mesenteric Ischemia with Endoscopic Duplex Ultrasound
Vasc Health Risk Manag, 18, 233-243
DOI 10.2147/VHRM.S358570, PubMed 35431549

Tran TT, Vaage EB, Mehta A, Chopra A, Tietze L, Kolderup A, Anthi A, König M, Nygaard G, Lind A, Müller F, Nissen-Meyer LS, Magnus P, Trogstad L, Mjaaland S, Søraas A, Midtvedt K, Åsberg A, Barratt-Due A, Medhus AW, Høivik ML, Lundin K, Karlsen RF, Dahle R, Danielsson K et al. (2022)
Titers of antibodies against ancestral SARS-CoV-2 correlate with levels of neutralizing antibodies to multiple variants
NPJ Vaccines, 7 (1), 174
DOI 10.1038/s41541-022-00586-7, PubMed 36585405

Publications 2021

Anisdahl K, Svatun Lirhus S, Medhus AW, Moum B, Melberg HO, Høivik ML (2021)
First-line biologic treatment of inflammatory bowel disease during the first 12 months after diagnosis from 2010 to 2016: a Norwegian nationwide registry study
Scand J Gastroenterol, 56 (10), 1163-1168
DOI 10.1080/00365521.2021.1955147, PubMed 34320885

Evensen H, Småstuen MC, Schulz A, Kristensen V, Larssen L, Skattum J, Sandstad O, Hauge T, Medhus AW (2021)
One year comprehensive prospective follow-up of achalasia patients after peroral endoscopic myotomy
Ann Med, 53 (1), 2225-2233
DOI 10.1080/07853890.2021.2005253, PubMed 34806501

Hoff G, Botteri E, Huppertz-Hauss G, Kvamme JM, Holme Ø, Aabakken L, Dahler S, Medhus AW, Blomgren I, Sandvei P, Darre-Næss O, Kjellevold Ø, Seip B (2021)
The effect of train-the-colonoscopy-trainer course on colonoscopy quality indicators
Endoscopy, 53 (12), 1229-1234
DOI 10.1055/a-1352-4583, PubMed 33622001

Kristensen VA, Opheim R, Perminow G, Huppertz-Hauss G, Detlie TE, Lund C, Andersen S, Olsen BC, Johansen I, Medhus AW, Vatn S, Brackmann S, Olbjørn C, Rove J, Henriksen M, Løvlund EE, Bengtson MB, Aabrekk TB, Tønnessen T, Vikskjold FB, Yassin H, Frigstad SO, Hasund A, Høie O, Schmidt K et al. (2021)
Inflammatory bowel disease in South-Eastern Norway III (IBSEN III): a new population-based inception cohort study from South-Eastern Norway
Scand J Gastroenterol, 56 (8), 899-905
DOI 10.1080/00365521.2021.1922746, PubMed 34154494

Lorentzen J, Medhus AW, Hofsø D, Svanevik M, Seip B, Hjelmesæth J (2021)
Sleeve Gastrectomy Confers Higher Risk of Gastroesophageal Reflux Disease Than Gastric Bypass: A Randomized Controlled Trial From the Oseberg Reflux Working Group
Gastroenterology, 161 (6), 2044-2046.e4
DOI 10.1053/j.gastro.2021.08.021, PubMed 34419459

Lorvik KB, Meyer-Myklestad MH, Kushekar K, Handeland C, Medhus AW, Lund-Iversen M, Stiksrud B, Kvale D, Dyrhol-Riise AM, Taskén K, Reikvam DH (2021)
Enhanced Gut-Homing Dynamics and Pronounced Exhaustion of Mucosal and Blood CD4⁺ T Cells in HIV-Infected Immunological Non-Responders
Front Immunol, 12, 744155
DOI 10.3389/fimmu.2021.744155, PubMed 34691047

Tønnesen CJ, Hjelmesæth J, Hofsø D, Tonstad S, Hertel JK, Heggen E, Johnson LK, Mathisen TE, Kalager M, Wieszczy P, Medhus AW, Løberg M, Aabakken L, Bretthauer M (2021)
A novel intragastric balloon for treatment of obesity and type 2 diabetes. A two-center pilot trial
Scand J Gastroenterol, 57 (2), 232-238
DOI 10.1080/00365521.2021.1994641, PubMed 34714203

Publications 2020

Berge ST, Safi N, Medhus AW, Sundhagen JO, Hisdal J, Kazmi SSH (2020)
Perioperative Microcirculatory Changes Detected with Gastroscopy Assisted Laser Doppler Flowmetry and Visible Light Spectroscopy in Patients with Median Arcuate Ligament Syndrome
Vasc Health Risk Manag, 16, 331-341
DOI 10.2147/VHRM.S252192, PubMed 32982262

Kazmi SSH, Berge ST, Sahba M, Medhus AW, Sundhagen JO (2020)
A Short Series of Laparoscopic Mesenteric Bypasses for Chronic Mesenteric Ischemia
Vasc Health Risk Manag, 16, 87-97
DOI 10.2147/VHRM.S243264, PubMed 32256075

Lorentzen J, Medhus AW, Hertel JK, Borgeraas H, Karlsen TI, Kolotkin RL, Sandbu R, Sifrim D, Svanevik M, Hofsø D, Seip B, Hjelmesæth J (2020)
Erosive Esophagitis and Symptoms of Gastroesophageal Reflux Disease in Patients with Morbid Obesity with and without Type 2 Diabetes: a Cross-sectional Study
Obes Surg, 30 (7), 2667-2675
DOI 10.1007/s11695-020-04545-w, PubMed 32193740

Safi N, Johannessen HO, Medhus AW, Mala T, Kazmi SSH (2020)
Laser Doppler Flowmetry and Visible Light Spectroscopy of the Gastric Tube During Minimally Invasive Esophagectomy
Vasc Health Risk Manag, 16, 497-505
DOI 10.2147/VHRM.S269138, PubMed 33273819

Publications 2019

Berge ST, Safi N, Medhus AW, Ånonsen K, Sundhagen JO, Hisdal J, Kazmi SSH (2019)
Gastroscopy assisted laser Doppler flowmetry and visible light spectroscopy in patients with chronic mesenteric ischemia
Scand J Clin Lab Invest, 79 (7), 541-549
DOI 10.1080/00365513.2019.1672084, PubMed 31560225

Bjørkhaug ST, Neupane SP, Bramness JG, Aanes H, Skar V, Medhus AW, Valeur J (2019)
Plasma cytokine levels in patients with chronic alcohol overconsumption: Relations to gut microbiota markers and clinical correlates
Alcohol, 85, 35-40
DOI 10.1016/j.alcohol.2019.10.002, PubMed 31610228

Bjørkhaug ST, Aanes H, Neupane SP, Bramness JG, Malvik S, Henriksen C, Skar V, Medhus AW, Valeur J (2019)
Characterization of gut microbiota composition and functions in patients with chronic alcohol overconsumption
Gut Microbes, 10 (6), 663-675
DOI 10.1080/19490976.2019.1580097, PubMed 30894059

Buer LCT, Moum BA, Cvancarova M, Warren DJ, Bolstad N, Medhus AW, Høivik ML (2019)
Real world data on effectiveness, safety and therapeutic drug monitoring of vedolizumab in patients with inflammatory bowel disease. A single center cohort
Scand J Gastroenterol, 54 (1), 41-48
DOI 10.1080/00365521.2018.1548646, PubMed 30650312

Evensen H, Kristensen V, Larssen L, Sandstad O, Hauge T, Medhus AW (2019)
Outcome of peroral endoscopic myotomy (POEM) in treatment-naive patients. A systematic review
Scand J Gastroenterol, 54 (1), 1-7
DOI 10.1080/00365521.2018.1549271, PubMed 30650313

Evensen H, Medhus AW (2019)
Response to letter to the editor: 'Outcome of peroral endoscopic myotomy (POEM) in treatment-naive patients. A systematic review'
Scand J Gastroenterol, 54 (4), 520
DOI 10.1080/00365521.2019.1599416, PubMed 30978123

Publications 2018

Buer LCT, Høivik ML, Warren DJ, Medhus AW, Moum BA (2018)
Combining Anti-TNF-α and Vedolizumab in the Treatment of Inflammatory Bowel Disease: A Case Series
Inflamm Bowel Dis, 24 (5), 997-1004
DOI 10.1093/ibd/izx110, PubMed 29668901

Holme Ø, Pedersen IB, Medhus AW, Aabakken L, Glomsaker T, Kvamme JM, Løberg M, Bretthauer M, Seip B, Kjellevold Ø, Jørgensen A, Furholm S, Hoff G, de Lange T (2018)
Endoscopy assistants influence the quality of colonoscopy
Endoscopy, 50 (9), 871-877
DOI 10.1055/s-0044-101706, PubMed 29444529

Høivik ML, Buer LCT, Cvancarova M, Warren DJ, Bolstad N, Moum BA, Medhus AW (2018)
Switching from originator to biosimilar infliximab - real world data of a prospective 18 months follow-up of a single-centre IBD population
Scand J Gastroenterol, 53 (6), 692-699
DOI 10.1080/00365521.2018.1463391, PubMed 29852793

Publications 2017

Bjørkhaug ST, Skar V, Medhus AW, Tollisen A, Bramness JG, Valeur J (2017)
Chronic alcohol overconsumption may alter gut microbial metabolism: a retrospective study of 719 ¹³C-D-xylose breath test results
Microb Ecol Health Dis, 28 (1), 1301725
DOI 10.1080/16512235.2017.1301725, PubMed 28572752

Buer L, Høivik ML, Medhus AW, Moum B (2017)
Does the Introduction of Biosimilars Change Our Understanding about Treatment Modalities for Inflammatory Bowel Disease?
Dig Dis, 35 (1-2), 74-82
DOI 10.1159/000449087, PubMed 28147370

Buer LC, Moum BA, Cvancarova M, Warren DJ, Medhus AW, Høivik ML (2017)
Switching from Remicade® to Remsima® is well Tolerated and Feasible: A Prospective, Open-label Study
J Crohns Colitis, 11 (3), 297-304
DOI 10.1093/ecco-jcc/jjw166, PubMed 27660339

Publications 2016

Knatten CK, Fjeld JG, Medhus AW, Pripp AH, Fyhn TJ, Aabakken L, Kjosbakken H, Edwin B, Emblem R, Bjørnland K (2016)
Preoperative liquid gastric emptying rate does not predict outcome after fundoplication
J Pediatr Surg, 52 (4), 540-543
DOI 10.1016/j.jpedsurg.2016.09.068, PubMed 28277299

Publications 2013

Finnes TE, Meyer HE, Falch JA, Medhus AW, Wentzel-Larsen T, Lofthus CM (2013)
Secular reduction of excess mortality in hip fracture patients >85 years
BMC Geriatr, 13, 25
DOI 10.1186/1471-2318-13-25, PubMed 23496953

Hope H, Skar V, Sandstad O, Husebye E, Medhus AW (2013)
Correction to: Small intestinal malabsorption in chronic alcoholism: a retrospective study of alcoholic patients by the ¹⁴C-D-xylose breath test
Scand J Gastroenterol, 48 (10), 1231-1232
DOI 10.3109/00365521.2013.825316, PubMed 28078905

Knatten CK, Avitsland TL, Medhus AW, Fjeld JG, Pripp AH, Emblem R, Bjørnland K (2013)
Gastric emptying in children with gastroesophageal reflux and in healthy children
J Pediatr Surg, 48 (9), 1856-61
DOI 10.1016/j.jpedsurg.2013.03.076, PubMed 24074657

Publications 2012

Brun AC, Størdal K, Johannesdottir GB, Fossum V, Bentsen BS, Medhus AW (2012)
Nissen fundoplication in children with cerebral palsy: influence on rate of gastric emptying and postprandial symptoms in relation to protein source in caloric liquid meals
Clin Nutr, 32 (4), 619-23
DOI 10.1016/j.clnu.2012.11.010, PubMed 23196118

Hope H, Skar V, Sandstad O, Husebye E, Medhus AW (2012)
Small intestinal malabsorption in chronic alcoholism: a retrospective study of alcoholic patients by the ¹⁴C-D-xylose breath test
Scand J Gastroenterol, 47 (4), 428-34
DOI 10.3109/00365521.2011.648951, PubMed 22229732

Larssen L, Hauge T, Medhus AW (2012)
Stent treatment of malignant gastric outlet obstruction: the effect on rate of gastric emptying, symptoms, and survival
Surg Endosc, 26 (10), 2955-60
DOI 10.1007/s00464-012-2291-7, PubMed 22538695

Larssen L, Medhus AW, Körner H, Glomsaker T, Søberg T, Gleditsch D, Hovde Ø, Tholfsen JK, Skreden K, Nesbakken A, Hauge T (2012)
Long-term outcome of palliative treatment with self-expanding metal stents for malignant obstructions of the GI tract
Scand J Gastroenterol, 47 (12), 1505-14
DOI 10.3109/00365521.2012.711854, PubMed 23046494

Publications 2011

Brun AC, Størdal K, Johannesdottir GB, Bentsen BS, Medhus AW (2011)
The effect of protein composition in liquid meals on gastric emptying rate in children with cerebral palsy
Clin Nutr, 31 (1), 108-12
DOI 10.1016/j.clnu.2011.07.009, PubMed 21835514

Hope HB, Medhus AW, Sandstad O, Borge CR, Skar V (2011)
Reduced ¹³C-D-xylose absorption in alcoholics is more likely caused by alterations in small intestinal mucosa than delayed gastric emptying
Scand J Gastroenterol, 46 (4), 414-9
DOI 10.3109/00365521.2010.536252, PubMed 21275757

Larssen L, Medhus AW, Hjermstad MJ, Körner H, Glomsaker T, Søberg T, Gleditsch D, Hovde O, Nesbakken A, Tholfsen JK, Skreden K, Hauge T (2011)
Patient-reported outcomes in palliative gastrointestinal stenting: a Norwegian multicenter study
Surg Endosc, 25 (10), 3162-9
DOI 10.1007/s00464-011-1680-7, PubMed 21487867

Publications 2010

Lofthus CM, Medhus AW, Meyer HE (2010)
Database validity in assessing population trends in hip fracture rates in Canada
JAMA, 303 (2), 134-5; author reply 135
DOI 10.1001/jama.2009.1973, PubMed 20068206

Publications 2009

Larssen L, Medhus AW, Hauge T (2009)
Treatment of malignant gastric outlet obstruction with stents: an evaluation of the reported variables for clinical outcome
BMC Gastroenterol, 9, 45
DOI 10.1186/1471-230X-9-45, PubMed 19534803

Medhus AW, Bjørnland K, Emblem R, Husebye E (2009)
Motility of the oesophagus and small bowel in adults treated for Hirschsprung's disease during early childhood
Neurogastroenterol Motil, 22 (2), 154-60, e49
DOI 10.1111/j.1365-2982.2009.01397.x, PubMed 19735477

Publications 2007

Medhus AW, Bjørnland K, Emblem R, Husebye E (2007)
Liquid and solid gastric emptying in adults treated for Hirschsprung's disease during early childhood
Scand J Gastroenterol, 42 (1), 34-40
DOI 10.1080/00365520600842211, PubMed 17190760

Publications 2005

Lofthus CM, Cappelen I, Osnes EK, Falch JA, Kristiansen IS, Medhus AW, Nordsletten L, Meyer HE (2005)
Local and national electronic databases in Norway demonstrate a varying degree of validity
J Clin Epidemiol, 58 (3), 280-5
DOI 10.1016/j.jclinepi.2004.07.003, PubMed 15718117

Publications 2001

Medhus AW, Bjørnland K, Emblem R, Haug E, Husebye E (2001)
Are patients with Hirschsprung's disease prediabetic?
Metabolism, 50 (12), 1389-90
DOI 10.1053/meta.2001.28139, PubMed 11735080

Medhus AW, Bjørnland K, Emblem R, Haug E, Husebye E (2001)
Are patients with Hirschsprung's disease prediabetic?
In Metabolism, Grune & Stratton, New York, 50(2001)nr 12, s.1389-1390
BIBSYS 022058494

Medhus AW, Lofthus CM, Bredesen J, Husebye E (2001)
Gastric emptying: the validity of the paracetamol absorption test adjusted for individual pharmacokinetics
Neurogastroenterol Motil, 13 (3), 179-85
DOI 10.1046/j.1365-2982.2001.00249.x, PubMed 11437980

Publications 2000

Medhus AW, Bondi J, Gaustad P, Husebye E (2000)
Low-dose intravenous erythromycin: effects on postprandial and fasting motility of the small bowel
Aliment Pharmacol Ther, 14 (2), 233-40
DOI 10.1046/j.1365-2036.2000.00693.x, PubMed 10651665

Medhus AW, Sandstad O, Bredesen J, Husebye E (2000)
Stimulation of the small intestine by nutrients in relation to phase of the migrating motor complex
Scand J Gastroenterol, 35 (5), 494-500
DOI 10.1080/003655200750023750, PubMed 10868452

Publications 1999

Medhus AW, Sandstad O, Bredesen J, Husebye E (1999)
Delay of gastric emptying by duodenal intubation: sensitive measurement of gastric emptying by the paracetamol absorption test
Aliment Pharmacol Ther, 13 (5), 609-20
DOI 10.1046/j.1365-2036.1999.00519.x, PubMed 10233184

Medhus AW, Sandstad O, Näslund E, Hellström PM, Husebye E (1999)
The influence of the migrating motor complex on the postprandial endocrine response
Scand J Gastroenterol, 34 (10), 1012-8
DOI 10.1080/003655299750025129, PubMed 10563672