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Showing results 1-50 of 56 << Previous 1 2    Next >>

2020
1 Amini, Maryam; Niemi, Essi; Hisdal, Jonny; Kalvøy, Håvard; Tronstad, Christian; Scholz, Hanne; Rosales, Antonio; Martinsen, Ørjan Grøttem.
Monitoring the quality of frozen-thawed venous segments using bioimpedance spectroscopy. Physiological Measurement 2020
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2019
2 Andersen, Jan-Hugo; Bjerke, Olav; Blakaj, Fatos; Flugsrud, Vilde Moe; Jacobsen, Fredrik Alstad; Jonsson, Marius; Kosaka, Eirik Nobuki; Langstrand, Petter André; Martinsen, Øyvind Grannes; Moen, Alexander Stene; Moen, Emily Qing Zang; Nystad, Øyvind Knutsen; Qureshi, Mahum; Olesen, Eline; Risopatròn, Victor Josè Østrem; Ruud, Simen Kristoffer; Stensø, Nikolai; Winje, Fredrik; Winness, Eirik Vetle; Abie, Sisay Mebre; Joten, Vegard Munkeby; Tronstad, Christian; Elvebakk, Ole; Martinsen, Ørjan Grøttem.
Bioimpedance and NIR for non-invasive assessment of blood glucose. Journal of Electrical Bioimpedance 2019 ;Volume 10. p. 133-138
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3 Aria, Shafa; Elfarri, Yassine; Elvegård, Marius; Gottfridsson, Adam; Grønaas, Halvor; Harang, Sigve Smedsrud; Jensen, Anders; Madland, Thomas Emil Rolland; Martins, Ivar Bruvik; Olstad, Marius Wilhelm; Ryan, Tommy Lee; Shaban, Anwar Nazih; Svenningsen, Øyvind Løken; Sørensen, Andre Djupvik; Ulvestad, Emil Holm; Vister, Ole Martin; Øvergaard, Morten Bratgjerd; Kalvøy, Håvard; Pettersen, Fred-Johan; Odland, Hans Henrik; Joten, Vegard Munkeby; Martinsen, Øyvind Grannes; Tronstad, Christian; Elvebakk, Ole; Martinsen, Ørjan Grøttem.
Measuring blood pulse wave velocity with bioimpedance in different age groups. Sensors 2019 ;Volume 19:850.(4) p. 1-10
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4 Bjørhei, Andreas; Pedersen, Filip T.; Muhammad, Saeed; Tronstad, Christian; Kalvøy, Håvard; Wojniusz, Slawomir; Pabst, Oliver; Sütterlin, Stefan.
An investigation on bilateral asymmetry in electrodermal activity. Frontiers in Behavioral Neuroscience 2019 ;Volume 13.(88)
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5 Elvebakk, Ole; Tronstad, Christian; Birkeland, Kåre I.; Jenssen, Trond Geir; Bjørgaas, Marit Ragnhild Rokne; Gulseth, Hanne Løvdal; Kalvøy, Håvard; Høgetveit, Jan Olav; Martinsen, Ørjan Grøttem.
A multiparameter model for non-invasive detection of hypoglycemia. Physiological Measurement 2019 ;Volume 40.(8) p. 1-14
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6 Martinsen, Tormod; Pettersen, Fred-Johan; Kalvøy, Håvard; Tronstad, Christian; Kvarstein, Gunnvald; Bakken, André; Høgetveit, Jan Olav; Martinsen, Ørjan Grøttem; Grimnes, Sverre; Frich, Lars Inge.
Electrosurgery and temperature increase in tissue with a passive metal implant. Frontiers in surgery 2019 ;Volume 6:8. p. 1-8
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7 Martinsen, Ørjan Grøttem; Kalvøy, Håvard; Bari, Dindar S.; Tronstad, Christian.
A circuit for simultaneous measurements of skin electrical conductance, susceptance, and potential. Journal of Electrical Bioimpedance 2019 ;Volume 10. p. 110-112
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8 Tronstad, Christian; Elvebakk, Ole; Staal, Odd Martin; Kalvøy, Håvard; Høgetveit, Jan Olav; Jenssen, Trond Geir; Birkeland, Kåre I.; Martinsen, Ørjan Grøttem.
Non-invasive prediction of blood glucose trends during hypoglycemia. Analytica Chimica Acta 2019 ;Volume 1052. p. 37-48
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9 Tronstad, Christian; Høgetveit, Jan Olav; Elvebakk, Ole; Kalvøy, Håvard.
Age-related differences in the morphology of the impedance cardiography signal. Journal of Electrical Bioimpedance 2019 ;Volume 10.(1) p. 139-145
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10 Tronstad, Christian; Strand-Amundsen, Runar James.
Possibilities in the application of machine learning on bioimpedance time-series. Journal of Electrical Bioimpedance 2019 ;Volume 10.(1) p. 24-33
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2018
11 Bari, D. S.; Aldosoky, H. Y. Y.; Tronstad, Christian; Kalvøy, Håvard; Martinsen, Ørjan Grøttem.
Electrodermal activity responses for quantitative assessment of felt pain. Journal of Electrical Bioimpedance 2018 ;Volume 9. p. 52-58
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12 Bari, Dindar S.; Aldosky, Haval Y. Yacoob; Tronstad, Christian; Kalvøy, Håvard; Martinsen, Ørjan Grøttem.
Influence of relative humidity on electrodermal levels and responses. Skin Pharmacology and Physiology 2018 ;Volume 31. p. 298-307
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13 Bruehl, Stephen; Bjørkholt Olsen, Roy; Tronstad, Christian; Sevre, Knut; Burns, John W; Schirmer, Henrik; Nielsen, Christopher Sivert; Stubhaug, Audun; Rosseland, Leiv Arne.
Chronic pain-related changes in cardiovascular regulation and impact on comorbid hypertension in a general population: the Tromsø study. Pain 2018 ;Volume 159.(1) p. 119-127
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14 Elvebakk, Ole; Tronstad, Christian; Birkeland, Kåre I.; Jenssen, Trond Geir; Bjørgaas, Marit Ragnhild Rokne; Frøslie, Kathrine Frey; Godang, Kristin; Kalvøy, Håvard; Martinsen, Ørjan Grøttem; Gulseth, Hanne Løvdal.
Evaluation of hypoglycaemia with non-invasive sensors in people with type 1 diabetes and impaired awareness of hypoglycaemia. Scientific Reports 2018 ;Volume 8:14722. p. 1-11
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15 Pabst, Oliver.
Electrical properties of human skin: From linear recordings of exogenous electrodermal activity to non-linear memristor measurements. Oslo: Universitetet i Oslo 2018 ;Volume 2018.Series of dissertations submitted to the Faculty of Mathematics and Natural Sciences, University of Oslo.(1971)
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16 Strand-Amundsen, Runar James; Tronstad, Christian; Kalvøy, Håvard; Ruud, Tom Erik; Høgetveit, Jan Olav; Martinsen, Ørjan Grøttem; Tønnessen, Tor Inge.
Small intestinal ischemia and reperfusion - Bioimpedance measurements. Physiological Measurement 2018 ;Volume 39.(2) p. -
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17 Strand-Amundsen, Runar James; Tronstad, Christian; Reims, Henrik Mikael; Reinholt, Finn P.; Høgetveit, Jan Olav; Tønnessen, Tor Inge.
Machine learning for intraoperative prediction of viability in ischemic small intestine. Physiological Measurement 2018 ;Volume 39.(10) p. 1-16
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2017
18 Bari, D. S.; Aldosky, H. Y. Y.; Tronstad, Christian; Kalvøy, Håvard; Martinsen, Ørjan Grøttem.
Electrodermal responses to discrete stimuli measured by skin conductance, skin potential, and skin susceptance. Skin research and technology 2017 ;Volume 24.(1) p. 108-116
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19 Kalvøy, Håvard; Tronstad, Christian; Ullensvang, Kyrre; Steinfeldt, Thorsten; Sauter, Axel Rudolf.
Detection of needle to nerve contact based on electric bioimpedance and machine learning methods. IEEE Engineering in Medicine and Biology Society. Conference Proceedings 2017 p. 9-12
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20 Pabst, Oliver; Tronstad, Christian; Grimnes, Sverre; Fowles, Don C.; Martinsen, Ørjan Grøttem.
Comparison between the AC and DC measurement of electrodermal activity. Psychophysiology 2017 ;Volume 54.(3) p. 374-385
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21 Pabst, Oliver; Tronstad, Christian; Martinsen, Ørjan Grøttem.
Instrumentation, electrode choice and challenges in human skin memristor measurement. IEEE Engineering in Medicine and Biology Society. Conference Proceedings 2017 p. 1844-1848
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22 Strand-Amundsen, Runar James; Reims, Henrik Mikael; Tronstad, Christian; Kalvøy, Håvard; Martinsen, Ørjan Grøttem; Høgetveit, Jan Olav; Ruud, Tom Erik; Tønnessen, Tor Inge.
Ischemic small intestine - In vivo versus ex vivo bioimpedance measurements. Physiological Measurement 2017 ;Volume 38.(5) p. 715-728
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23 Tronstad, Christian; Elvebakk, Ole; Kalvøy, Håvard; Bjørgaas, Marit Ragnhild Rokne; Martinsen, Ørjan Grøttem.
Detection of sympathoadrenal discharge by parameterisation of skin conductance and ECG measurement. IEEE Engineering in Medicine and Biology Society. Conference Proceedings 2017 p. 3997-4000
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2016
24 Kalvøy, Håvard; Sauter, Axel Rudolf; Tronstad, Christian; Martinsen, Ørjan Grøttem.
Neural tissue discrimination with machine learning methods. Proceedings of the 16th International Conference on Electrical Bioimpedance 2016 p. 71-
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25 Nygaard, Kent Inge; Thiara, Amrit Paul Singh; Tronstad, Christian; Ringdal, Mari-Anne I Lindstein; Fiane, Arnt E.
VAVD vacuum may cause bubble transgression in membrane oxygenators. Perfusion 2016 ;Volume 31.(8) p. 648-652
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26 Pabst, Oliver; Tronstad, Christian; Martinsen, Ørjan Grøttem; Grimnes, Sverre.
Comparison between AC and DC exosomatic EDA measuring methods. Proceedings of the 16th International Conference on Electrical Bioimpedance 2016 p. 65-
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27 Strand-Amundsen, Runar James; Tronstad, Christian; Kalvøy, Håvard; Gundersen, Yngvar; Krohn, Claus Danckert; Aasen, Ansgar Oddne; Holhjem, Lars; Reims, Henrik Mikael; Martinsen, Ørjan Grøttem; Høgetveit, Jan Olav; Ruud, Tom Erik; Tønnessen, Tor Inge.
In vivo characterization of ischemic small intestine using bioimpedance measurements. Physiological Measurement 2016 ;Volume 37.(2) p. 257-275
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28 Strand-Amundsen, Runar James; Tronstad, Christian; Martinsen, Ørjan Grøttem; Høgetveit, Jan Olav; Ruud, TE; Tønnessen, Tor Inge.
Bioimpedance - in vivo vs in vitro ischemic small intestine. Proceedings of the 16th International Conference on Electrical Bioimpedance 2016 p. 53-
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29 Tronstad, Christian; Elvebakk, Ole; Martinsen, Ørjan Grøttem; Kalvøy, Håvard; Høgetveit, Jan Olav.
Bioimpedance for prediction of hypoglycemic trends. Proceedings of the 16th International Conference on Electrical Bioimpedance 2016 p. -
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2015
30 Elvebakk, Ole; Tronstad, Christian; Gulseth, Hanne Løvdal; Jenssen, Trond Geir; Bjørgaas, Marit Ragnhild Rokne; Høgetveit, Jan Olav; Martinsen, Ørjan Grøttem; Birkeland, Kåre I..
Physiological and symptomatic responses to hypoglycemia in patients with impaired awareness. Meeting of Scand. Soc. for the Study of Diabetes; 2015-04-24 - 2015-04-26
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31 Martinsen, Ørjan Grøttem; Pabst, Oliver; Tronstad, Christian; Grimnes, Sverre.
Sources of error in AC measurement of skin conductance. Journal of Electrical Bioimpedance 2015 ;Volume 6.(1) p. 49-53
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32 Pischke, Søren Erik; Hyler, Stefan; Tronstad, Christian; Bergsland, Jacob; Fosse, Erik; Halvorsen, Per Steinar; Skulstad, Helge; Tønnessen, Tor Inge.
Myocardial tissue CO2 tension detects coronary blood flow reduction after coronary artery bypass in real-time. British Journal of Anaesthesia 2015 ;Volume 114.(3) p. 414-422
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33 Tronstad, Christian; Omenås, Ivar Nagelgaard; Rosseland, Leiv Arne.
An improved artifact removal algorithm for continuous cardiac output and blood pressure recordings. IEEE Engineering in Medicine and Biology Society. Conference Proceedings 2015 ;Volume 2015-November. p. 5968-5972
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34 Tronstad, Christian; Staal, Odd Martin; Saelid, Steinar; Martinsen, Ørjan Grøttem.
Model- based filtering for artifact and noise suppression with state estimation for electrodermal activity measurements in real time. IEEE Engineering in Medicine and Biology Society. Conference Proceedings 2015 p. 2750-2753
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35 Tronstad, Christian; Staal, Odd Martin; Sælid, Steinar; Martinsen, Ørjan Grøttem.
Model-based filtering for artifact and noise suppression with state estimation for electrodermal activity measurements in real time. EMBC 2015; 2015-08-25 - 2015-08-30
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2014
36 Nordbotten, Bernt Jørgen; Tronstad, Christian; Martinsen, Ørjan Grøttem; Grimnes, Sverre.
Estimation of skin conductance at low frequencies using measurements at higher frequencies for EDA applications. Physiological Measurement 2014 ;Volume 35.(6) p. 1011-1018
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37 Tronstad, Christian; Helsing, Per; Tønseth, Kim Aleksander; Grimnes, Sverre; Polesie, Anne Lene Krogstad.
Tumescent suction curettage vs. curettage only for treatment of axillary hyperhidrosis evaluated by subjective and new objective methods. Acta Dermato-Venereologica 2014 ;Volume 94.(2) p. 215-220
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38 Tronstad, Christian; Pripp, Are Hugo.
Statistical methods for bioimpedance analysis. Journal of Electrical Bioimpedance 2014 ;Volume 5.(1) p. 14-27
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2013
39 Elvebakk, Ole; Tronstad, Christian; Høgetveit, Jan Olav; Jenssen, Trond Geir; Bjørgaas, Marit; Martinsen, Ørjan Grøttem.
Sweating reactions due to hypoglycemia detected by skin AC conductance. ICEBI 2013; 2013-04-22 - 2013-04-25
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40 Kalvøy, Håvard; Tronstad, Christian; Grimnes, Sverre; Martinsen, Ørjan Grøttem.
Simultaneous measurement of DC potential and AC conductance to monitor electrodermal activity at a single electrode. ICEBI 2013; 2013-04-22 - 2013-04-25
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41 Nordbotten, Bernt Jørgen; Tronstad, Christian; Martinsen, Ørjan Grøttem; Grimnes, Sverre.
Estimation of skin conductance at low frequencies from measurements at higher frequencies for EDA application. ICEBI 2013; 2013-04-22 - 2013-04-25
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42 Tronstad, Christian; Elvebakk, Ole; Høgetveit, Jan Olav; Jenssen, Trond Geir; Bjørgaas, Marit Ragnhild Rokne; Martinsen, Ørjan Grøttem.
Monitoring of sweat activity for detection of severe hypoglycemia – A pilot study. IEEE EMBC; 2013-07-03 - 2013-07-07
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43 Tronstad, Christian; Kalvøy, Håvard; Grimnes, Sverre; Martinsen, Ørjan Grøttem.
Improved Estimation of Sweating Based on Electrical Properties of Skin. Annals of Biomedical Engineering 2013 ;Volume 41.(5) p. 1074-1083
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44 Tronstad, Christian; Kalvøy, Håvard; Grimnes, Sverre; Martinsen, Ørjan Grøttem.
Sweat production estimated by bioimpedance and bioelectrical signals. ICEBI 2013; 2013-04-22 - 2013-04-25
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45 Tronstad, Christian; Kalvøy, Håvard; Grimnes, Sverre; Martinsen, Ørjan Grøttem.
Waveform difference between skin conductance and skin potential responses in relation to electrical and evaporative properties of skin. Psychophysiology 2013 ;Volume 50.(11) p. 1070-1078
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2012
46 Kvaløy, Håvard; Tronstad, Christian; Grimnes, Sverre; Martinsen, Ørjan Grøttem.
Electrodermal activity measured as DC potential and AC conductance at the same electrode. International Federation for Medical and Biological Engineering Proceedings 2012 ;Volume 39.
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47 Pischke, Søren Erik; Tronstad, Christian; Holhjem, Lars; Halvorsen, Per Steinar; Tønnessen, Tor Inge.
Perioperative detection of myocardial ischaemia/reperfusion with a novel tissue CO2 monitoring technology. European Journal of Cardio-Thoracic Surgery 2012 ;Volume 42.(1) p. 157-163
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48 Pischke, Søren Erik; Tronstad, Christian; Holhjem, Lars; Line, Pål Dag; Haugaa, Håkon; Tønnessen, Tor Inge.
Hepatic and Abdominal Carbon Dioxide Measurements Detect and Distinguish Hepatic Artery Occlusion and Portal Vein Occlusion in Pigs. Liver transplantation 2012 ;Volume 18.(12) p. 1485-1494
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49 Tronstad, Christian.
Developments in biomedical sensors based on electrical impedance- Improvements in electrodes, instrumentation and signal processing technology for new and existing biomedical sensors for clinical use. Universitetet i Oslo: Det matematisk naturvitenskapelige fakultet 2012 201 p.
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50 Tronstad, Christian; Kvaløy, Håvard; Martinsen, Ørjan Grøttem; Grimnes, Sverre.
New parameters of electrodermal activity and estimation of sweat production. International Federation for Medical and Biological Engineering Proceedings 2012 ;Volume 39.
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