Ørjan Grøttem Martinsen

Professor - Electronics
Image of Ørjan Grøttem Martinsen
Norwegian version of this page
Phone +47-22856474
Username
Visiting address Sem Sælands vei 24 Fysikkbygningen 0371 OSLO
Postal address Postboks 1048 Blindern 0316 OSLO

Academic Interests

My research is mainly on the passive electrical properties of biological materials (bioimpedance). Since these properties are highly influenced by the anatomy and physiology of the tissue, bioimpedance measurements can be used for characterization or diagnostication of the tissue. It is e.g. possible to use bioimpedance measurements to classify cancerous tissue, to separate between different qualities of meat, to assess the moisture content of the skin or the stress level of a person. These are just a few of numerous possible applications of bioimpedance technology in medicine, biology, sports, cosmetics and psychology. My particular expertise is within bioimpedance basic theory, instrumentation, electrode systems and modeling.

Teaching

Earlier

Current

Higher education and employment history

I became an electrical engineer in 1983 and was employed for some years at Siemens AS working with transformer and power stations. I then continued my education at the University of Oslo and became a Cand. Scient. in electronics/instrumentation in 1990.Then Dr. Scient. in 1995 on a thesis on the electrical properties of human skin. Since then I have worked at the Department of Physics, University of Oslo, from 2002 as a full professor. I also have a part time position as researcher at the Department of Clinical and Biomedical Engineering at Oslo University Hospital.

Appointments

Recognition

  • IEEE Senior Member, 2006
  • CLABIO Award, 2012
  • Fellow at Institute of Physics (FInstP), 2015
  • Dr. Honoris Causa, Tallinn University of Technology, Estonia, 2018
Tags: Biomedical physics, Electronics, Electric properties, Bioimpedance

Publications

  • Bari, Dindar S.; Aldosky, Haval Y. Yacoob; Tronstad, Christian; Kalvøy, Håvard & Martinsen, Ørjan Grøttem (2018). Influence of relative humidity on electrodermal levels and responses. Skin Pharmacology and Physiology.  ISSN 1660-5527.  s 298- 307 . doi: 10.1159/000492275
  • 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 (2018). Evaluation of hypoglycaemia with non-invasive sensors in people with type 1 diabetes and impaired awareness of hypoglycaemia. Scientific Reports.  ISSN 2045-2322.  8:14722, s 1- 11 . doi: 10.1038/s41598-018-33189-1 Full text in Research Archive.
  • Pabst, Oliver; Martinsen, Ørjan Grøttem & Chua, Leon (2018). The non-linear electrical properties of human skin make it a generic memristor. Scientific Reports.  ISSN 2045-2322.  8(1), s 1- 9 . doi: 10.1038/s41598-018-34059-6
  • Strand-Amundsen, Runar James; Tronstad, Christian; Kalvøy, Håvard; Ruud, Tom Erik; Høgetveit, Jan Olav; Martinsen, Ørjan Grøttem & Tønnessen, Tor Inge (2018). Small intestinal ischemia and reperfusion - Bioimpedance measurements. Physiological Measurement.  ISSN 0967-3334.  39(2) . doi: 10.1088/1361-6579/aaa576
  • Adamczak, Malgorzata Iwona; Martinsen, Ørjan Grøttem; Smistad, Gro & Hiorth, Marianne (2017). Polymer coated mucoadhesive liposomes intended for the management of xerostomia. International Journal of Pharmaceutics.  ISSN 0378-5173.  527(1-2), s 72- 78 . doi: 10.1016/j.ijpharm.2017.05.032 Full text in Research Archive.
  • Bari, D. S.; Aldosky, H. Y. Y.; Tronstad, Christian; Kalvøy, Håvard & Martinsen, Ørjan Grøttem (2017). Electrodermal responses to discrete stimuli measured by skin conductance, skin potential, and skin susceptance. Skin research and technology.  ISSN 0909-752X.  24(1), s 108- 116 . doi: 10.1111/srt.12397
  • Pabst, Oliver & Martinsen, Ørjan Grøttem (2017). Interpretation of the pinched point position in human skin memristor measurements. International Federation for Medical and Biological Engineering Proceedings.  ISSN 1680-0737.  65, s 430- 433 . doi: 10.1007/978-981-10-5122-7_108
  • Pabst, Oliver; Tronstad, Christian; Grimnes, Sverre; Fowles, Don C. & Martinsen, Ørjan Grøttem (2017). Comparison between the AC and DC measurement of electrodermal activity. Psychophysiology.  ISSN 0048-5772.  54(3), s 374- 385 . doi: 10.1111/psyp.12803
  • Pabst, Oliver; Tronstad, Christian & Martinsen, Ørjan Grøttem (2017). Instrumentation, electrode choice and challenges in human skin memristor measurement. IEEE Engineering in Medicine and Biology Society. Conference Proceedings.  ISSN 1557-170X.  s 1844- 1848 . doi: 10.1109/EMBC.2017.8037205
  • Restan, Magnus Saed; Jensen, Henrik; Shen, Xiantao; Huang, Chuixiu; Martinsen, Ørjan Grøttem; Kubáň, Pavel; Gjelstad, Astrid & Pedersen-Bjergaard, Stig (2017). Comprehensive study of buffer systems and local pH effects in electromembrane extraction. Analytica Chimica Acta.  ISSN 0003-2670.  984, s 116- 123 . doi: 10.1016/j.aca.2017.06.049
  • Schwingenschuh, Simon; Scharfetter, Hermann; Martinsen, Ørjan Grøttem; Boulgaropoulos, Beate; Augustin, Thomas; Tiffner, Katrin; Dragatin, Christian; Raml, Reingard; Höfferer, Christian; Prandl, Eva-Christina; Sinner, Frank & Hajnsek, Martin (2017). Assessment of skin permeability to topically applied drugs by skin impedance and admittance. Physiological Measurement.  ISSN 0967-3334.  38(11), s N138- N150 . doi: 10.1088/1361-6579/aa904e
  • Skjærvø, Øystein; Brandtzaeg, Ole Kristian; Lausund, Kristian Blindheim; Pabst, Oliver; Martinsen, Ørjan Grøttem; Lundanes, Elsa & Wilson, Steven Ray Haakon (2017). Exploring bioimpendance instrumentation for the characterization of open tubular liquid chromatography columns. Journal of Chromatography A.  ISSN 0021-9673.  1534, s 195- 200 . doi: 10.1016/j.chroma.2017.12.060
  • Strand-Amundsen, Runar James; Reims, Henrik Mikael; Tronstad, Christian; Kalvøy, Håvard; Martinsen, Ørjan Grøttem; Høgetveit, Jan Olav; Ruud, Tom Erik & Tønnessen, Tor Inge (2017). Ischemic small intestine - In vivo versus ex vivo bioimpedance measurements. Physiological Measurement.  ISSN 0967-3334.  38(5), s 715- 728 . doi: 10.1088/1361-6579/aa67b7
  • Tronstad, Christian; Elvebakk, Ole; Kalvøy, Håvard; Bjørgaas, Marit Ragnhild Rokne & Martinsen, Ørjan Grøttem (2017). Detection of sympathoadrenal discharge by parameterisation of skin conductance and ECG measurement. IEEE Engineering in Medicine and Biology Society. Conference Proceedings.  ISSN 1557-170X.  s 3997- 4000 . doi: 10.1109/EMBC.2017.8037732
  • Abie, Sisay Mebre; Bergli, Joakim; Galperin, Yuri & Martinsen, Ørjan Grøttem (2016). Universality of AC conductance in human hair. Biomedical engineering and physics express.  ISSN 2057-1976.  2 . doi: 10.1088/2057-1976/2/2/027002
  • Adamczak, Malgorzata Iwona; Martinsen, Ørjan Grøttem; Smistad, Gro & Hiorth, Marianne (2016). Water sorption properties of HM-pectin and liposomes intended to alleviate dry mouth. International Journal of Pharmaceutics.  ISSN 0378-5173.  506(1-2), s 201- 206 . doi: 10.1016/j.ijpharm.2016.04.050 Full text in Research Archive.
  • Canali, Chiara; Aristovich, Kirill; Ceccarelli, L.; Larsen, L. B.; Martinsen, Ørjan Grøttem; Wolff, A.; Dufva, M.; Emneus, Jenny & Heiskanen, A. (2016). Electrical impedance tomography methods for miniaturised 3D systems. Journal of Electrical Bioimpedance.  ISSN 1891-5469.  7, s 59- 67 . doi: 10.5617/jeb.4084
  • Canali, Chiara; Heiskanen, Arto; Martinsen, Ørjan Grøttem; Mohanty, Soumyaranjan; Dufva, Martin; Wolff, Anders & Emnéus, Jenny (2016). Impedance-based monitoring for tissue engineering applications. International Federation for Medical and Biological Engineering Proceedings.  ISSN 1680-0737.  54, s 36- 39 . doi: 10.1007/978-981-287-928-8_10
  • Pettersen, Fred Johan; Martinsen, Ørjan Grøttem; Høgetveit, Jan Olav; Kalvøy, Håvard & Odland, Hans Henrik (2016). Bioimpedance spectroscopy of temporal impedance changes in a beating heart. Biomedical engineering and physics express.  ISSN 2057-1976.  2
  • 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 (2016). In vivo characterization of ischemic small intestine using bioimpedance measurements. Physiological Measurement.  ISSN 0967-3334.  37(2), s 257- 275 . doi: 10.1088/0967-3334/37/2/257 Show summary
  • Canali, Chiara; Heiskanen, Arto; Muhammad, Haseena Bashir; Høyum, Per; Pettersen, Fred-Johan; Mette, Hemmingsen; Wolff, Anders; Dufva, Martin; Martinsen, Ørjan Grøttem & Emneus, Jenny (2015). Bioimpedance monitoring of 3D cell culturing-Complementary electrode configurations for enhanced spatial sensitivity. Biosensors & bioelectronics.  ISSN 0956-5663.  63, s 72- 79 . doi: 10.1016/j.bios.2014.07.020
  • Canali, Chiara; Larsen, L. B.; Martinsen, Ørjan Grøttem & Heiskanen, Arto (2015). Conductometric analysis in bio-applications: a universal impedance spectroscopy-based approach using modified electrodes. Sensors and actuators. B, Chemical.  ISSN 0925-4005.  212, s 544- 550 . doi: 10.1016/j.snb.2015.02.029
  • Canali, Chiara; Mazzoni, Carmine; Larsen, Layla Bashir; Heiskanen, Arto; Martinsen, Ørjan Grøttem; Wolff, Anders; Dufva, Martin & Emnéus, Jenny (2015). An impedance method for spatial sensing of 3D cell constructs - towards applications in tissue engineering. The Analyst.  ISSN 0003-2654.  140(17), s 6079- 6088 . doi: 10.1039/c5an00987a
  • Canali, Chiara; Mohanty, Soumyaranjan; Heiskanen, Arto; Muhammad, Haseena Bashir; Martinsen, Ørjan Grøttem; Dufva, Martin; Wolff, Anders & Emneus, Jenny (2015). Impedance spectroscopic characterisation of porosity in 3D cell culture scaffolds with different channel networks. Electroanalysis.  ISSN 1040-0397.  27(1), s 193- 199 . doi: 10.1002/elan.201400413
  • Kalvøy, Håvard; Aliau-Bonet, C; Pallas-Areny, R. & Martinsen, Ørjan Grøttem (2015). Effects of stray capacitance to ground in three electrode monopolar needle bioimpedance measurements. IEEE Engineering in Medicine and Biology Society. Conference Proceedings.  ISSN 1557-170X.  2015-November, s 7542- 7545 . doi: 10.1109/EMBC.2015.7320137
  • Martinsen, Ørjan Grøttem; Pabst, Oliver; Tronstad, Christian & Grimnes, Sverre (2015). Sources of error in AC measurement of skin conductance. Journal of Electrical Bioimpedance.  ISSN 1891-5469.  6(1), s 49- 53 . doi: 10.5617/jeb.2640
  • Pettersen, Fred Johan; Martinsen, Tormod; Høgetveit, Jan Olav & Martinsen, Ørjan Grøttem (2015). Unintentional heating at implants when using electrosurgery. IEEE Engineering in Medicine and Biology Society. Conference Proceedings.  ISSN 1557-170X.  s 5805- 5808 . doi: 10.1109/EMBC.2015.7319711
  • Tronstad, Christian; Staal, Odd Martin; Saelid, Steinar & Martinsen, Ørjan Grøttem (2015). 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.  ISSN 1557-170X.  s 2750- 2753 . doi: 10.1109/EMBC.2015.7318961
  • Martinsen, Ørjan Grøttem; Nordbotten, Bernt Jørgen; Grimnes, Sverre; Fossan, Helge & Eilevstjonn, Joar (2014). Bioimpedance-based respiration monitoring with a defibrillator. IEEE Transactions on Biomedical Engineering.  ISSN 0018-9294.  61(6), s 1858- 1862 . doi: 10.1109/TBME.2014.2308924
  • Nordbotten, Bernt Jørgen; Tronstad, Christian; Martinsen, Ørjan Grøttem & Grimnes, Sverre (2014). Estimation of skin conductance at low frequencies using measurements at higher frequencies for EDA applications. Physiological Measurement.  ISSN 0967-3334.  35(6), s 1011- 1018 . doi: 10.1088/0967-3334/35/6/1011
  • Pettersen, Fred Johan; Ferdous, Humayra; Kalvøy, Håvard; Martinsen, Ørjan Grøttem & Høgetveit, Jan Olav (2014). Comparison of four different FIM configurations - A simulation study. Physiological Measurement.  ISSN 0967-3334.  35(6), s 1067- 1082 . doi: 10.1088/0967-3334/35/6/1067
  • Øyri, Karl; Chavez-Santiago, Raul; Støa, Stig; Martinsen, Ørjan Grøttem; Balasingham, Ilangko & Fosse, Erik (2014). Wireless vital signs from a life-supporting medical device exposed to electromagnetic disturbance. MITAT. Minimally invasive therapy & allied technologies.  ISSN 1364-5706.  23(6), s 341- 349 . doi: 10.3109/13645706.2014.931869
  • Schwingenschuh, Simon; Hajnsek, Martin; Scharfetter, Hermann; Martinsen, Ørjan Grøttem; Tiffner, Katrin; Dragatin, Christian; Raml, Reingard; Mautner, Anton; Bodenlenz, Manfred & Sinner, Frank (2013). Skin impedance measurements support ex-vivo penetration studies for topical applied drugs. Biomedizinische Technik.  ISSN 0013-5585.  58(Suppl 1) . doi: 10.1515/bmt-2013-4420
  • Tronstad, Christian; Kalvøy, Håvard; Grimnes, Sverre & Martinsen, Ørjan Grøttem (2013). Improved Estimation of Sweating Based on Electrical Properties of Skin. Annals of Biomedical Engineering.  ISSN 0090-6964.  41(5), s 1074- 1083 . doi: 10.1007/s10439-013-0743-4
  • Tronstad, Christian; Kalvøy, Håvard; Grimnes, Sverre & Martinsen, Ørjan Grøttem (2013). Waveform difference between skin conductance and skin potential responses in relation to electrical and evaporative properties of skin. Psychophysiology.  ISSN 0048-5772.  50(11), s 1070- 1078 . doi: 10.1111/psyp.12092
  • Ahn, Andrew C.; Gow, Brian J.; Martinsen, Ørjan Grøttem; Zhao, Min; Grodzinsky, Alan J. & Baikie, Iain D. (2012). Applying the Kelvin probe to biological tissues: Theoretical and computational analyses. Physical Review E. Statistical, Nonlinear, and Soft Matter Physics.  ISSN 1063-651X.  85(6) . doi: 10.1103/PhysRevE.85.061901
  • Gow, B.J.; Cheng, J.L.; Baikie, I.D.; Martinsen, Ørjan Grøttem; Zhao, M.; Smith, S. & Ahn, A.C. (2012). Electrical Potential of Acupuncture Points: Use of a Noncontact Scanning Kelvin Probe. Evidence-based Complementary and Alternative Medicine.  ISSN 1741-427X. . doi: 10.1155/2012/632838
  • Hoekstra, F.; Martinsen, Ørjan Grøttem; Verdaasdonk, R.M.; Janssen, T.W.J. & Meijer, J.H. (2012). The Initial Systolic Time Interval in patients with spinal cord injury measured with impedance cardiography. Journal of Physics, Conference Series.  ISSN 1742-6588.
  • Johnsen, Gorm Krogh; Knaapila, Matti; Martinsen, Ørjan Grøttem & Helgesen, Geir (2012). Conductivity enhancement of silver filled polymer composites through electric field alignment. Composites Science And Technology.  ISSN 0266-3538.  72(15), s 1841- 1847 . doi: 10.1016/j.compscitech.2012.07.011
  • Grimnes, Sverre; Jabbari, Azar; Martinsen, Ørjan Grøttem & Tronstad, Christian (2011). Electrodermal activity by DC potential and AC conductance measured simultaneously at the same skin site. Skin research and technology.  ISSN 0909-752X.  17(1), s 26- 34 . doi: 10.1111/j.1600-0846.2010.00459.x
  • Johnsen, Gorm Krogh; Norlén, Lars; Martinsen, Ørjan Grøttem & Grimnes, Sverre (2011). Sorption Properties of the Human Stratum Corneum. Skin pharmacology and applied skin physiology.  ISSN 1422-2868.  24(4), s 190- 198 . doi: 10.1159/000324051
  • Johnsen, Gorm; Lutken, Carsten Andrew; Martinsen, Ørjan Grøttem & Grimnes, Sverre (2011). Memristive model of electro-osmosis in skin. Physical Review E. Statistical, Nonlinear, and Soft Matter Physics.  ISSN 1063-651X.  83, s 031916-1- 031916-5 . doi: 10.1103/PhysRevE.83.031916
  • Knaapila, Matti; Svåsand, Eldrid; Pinheiro, Jean Patrick; Martinsen, Ørjan Grøttem; Buchanan, Mark; Skjeltorp, Arne Torbjørn; Helgesen, Geir & Rømoen, Ola Taarud (2011). Conductivity Enhancement in Carbon Nanocone Adhesive by Electric Field Induced Formation of Aligned Assemblies. ACS Applied Materials and Interfaces.  ISSN 1944-8244.  3(2), s 378- 384 . doi: 10.1021/am100990c
  • Kvaløy, Håvard; Johnsen, Gorm Krogh; Martinsen, Ørjan Grøttem & Grimnes, Sverre (2011). New method for separation of electrode polarization impedance from measured tissue impedance. Open Biomedical Engineering Journal.  ISSN 1874-1207.  5, s 8- 13 . doi: 10.2174/1874120701105010008
  • Mikolajewska, Patrycja Maria; Rømoen, Ola Taarud; Martinsen, Ørjan Grøttem; Iani, Vladimir; Moan, Johan Emilian; Grimnes, Sverre & Juzeniene, Asta (2011). Bioimpedance for pain monitoring during cutaneous photodynamic therapy: Preliminary study. Photodiagnosis and Photodynamic Therapy.  ISSN 1572-1000.  8(4), s 307- 313 . doi: 10.1016/j.pdpdt.2011.06.001
  • Nordbotten, Bernt Jørgen; Tronstad, Christian; Martinsen, Ørjan Grøttem & Grimnes, Sverre (2011). Evaluation of algorithms for calculating bioimpedance phase angle values from measured whole-body impedance modulus. Physiological Measurement.  ISSN 0967-3334.  32(7), s 755- 765 . doi: 10.1088/0967-3334/32/7/S03
  • Grimnes, Sverre & Martinsen, Ørjan Grøttem (2010). Alpha-dispersion in human tissue. Journal of Physics, Conference Series.  ISSN 1742-6588.  224 . doi: 10.1088/1742-6596/224/1/012073
  • Grimnes, Sverre; Martinsen, Ørjan Grøttem & Johnsen, Gorm Krogh (2010). Mutual localization of electrode pairs in a 4-electrode measuring system. Journal of Physics, Conference Series.  ISSN 1742-6588.  224 . doi: 10.1088/1742-6596/224/1/012074
  • Høyum, Per; Kalvøy, Håvard; Martinsen, Ørjan Grøttem & Grimnes, Sverre (2010). Finite element model of needle electrode sensitivity. Journal of Physics, Conference Series.  ISSN 1742-6588.  224(1)
  • Høyum, Per; Kvaløy, Håvard; Martinsen, Ørjan Grøttem & Grimnes, Sverre (2010). A finite element model of needle electrode spatial sensitivity. Physiological Measurement.  ISSN 0967-3334.  31(10), s 1369- 1379 . doi: 10.1088/0967-3334/31/10/006
  • Jabbari, Azar; Johnsen, Børge; Grimnes, Sverre & Martinsen, Ørjan Grøttem (2010). Simultaneous measurement of skin potential and conductance in electrodermal response monitoring. Journal of Physics, Conference Series.  ISSN 1742-6588.  224 . doi: 10.1088/1742-6596/224/1/012091
  • Johnsen, Gorm Krogh; Martinsen, Ørjan Grøttem & Grimnes, Sverre (2010). Sorption studies of human keratinized tissues. Journal of Physics, Conference Series.  ISSN 1742-6588.  224 . doi: 10.1088/1742-6596/224/1/012094
  • Johnsen, Gorm Krogh; Martinsen, Ørjan Grøttem; Grimnes, Sverre & Haugsnes, Anne Berit (2010). A new approach for an estimation of the equilibrium stratum corneum water content. Skin research and technology.  ISSN 0909-752X.  16(2), s 142- 145 . doi: 10.1111/j.1600-0846.2009.00412.x
  • Kalvøy, Håvard; Høyum, Per; Grimnes, Sverre & Martinsen, Ørjan Grøttem (2010). From impedance theory to needle electrode guidance in tissue. Journal of Physics, Conference Series.  ISSN 1742-6588.  224 . doi: 10.1088/1742-6596/224/1/012072
  • Kalvøy, Håvard; Tronstad, Christian; Nordbotten, Bernt Jørgen; Grimnes, Sverre & Martinsen, Ørjan Grøttem (2010). Electrical Impedance of Stainless Steel Needle Electrodes. Annals of Biomedical Engineering.  ISSN 0090-6964.  38(7), s 2371- 2382 . doi: 10.1007/s10439-010-9989-2

View all works in Cristin

  • Grimnes, Sverre & Martinsen, Ørjan Grøttem (2015). Bioimpedance and Bioelectricity Basics. Academic Press.  ISBN 978-0-12-411470-8.  563 s.

View all works in Cristin

  • Brandtzaeg, Ole Kristian; Wilson, Steven Ray Haakon; Lundanes, Elsa; Reubsaet, Leon; Krauss, Stefan & Martinsen, Ørjan Grøttem (2018). Online sample Preparation Platforms for Targeted Nano Liquid Chromatography Mass Spectrometry Bioanalysis. Series of dissertations submitted to the Faculty of Mathematics and Natural Sciences, University of Oslo.. 1968.
  • Pabst, Oliver; Martinsen, Ørjan Grøttem; Tronstad, Christian & Wilson, Steven Ray Haakon (2018). Electrical properties of human skin: From linear recordings of exogenous electrodermal activity to non-linear memristor measurements. Series of dissertations submitted to the Faculty of Mathematics and Natural Sciences, University of Oslo.. 1971.
  • Bergli, Joakim; Galperin, Yuri; Martinsen, Ørjan Grøttem & Abie, Sisay Mebre (2016). Universality of AC conductance in human hair.
  • Broeze, K.; Elzen, R. van der; Rijssel, M.J. van; Eijnatten, M.A. van; Verdaasdonk, R.M.; Martinsen, Ørjan Grøttem & Meijer, J.H. (2016). Quest for the proper B-point in the ICG by echocardiography. Proceedings of the 16th International Conference on Electrical Bioimpedance.  s 35
  • Broeze, K.; Elzen, R. van der; Rijssel, M.J. van; Eijnatten, M.A. van; Verdaasdonk, R.M.; Martinsen, Ørjan Grøttem & Meijer, J.H. (2016). The X-point in the ICGmarks aortic valves closure. Proceedings of the 16th International Conference on Electrical Bioimpedance.  s 36
  • Kalvøy, Håvard; Sauter, Axel Rudolf; Tronstad, Christian & Martinsen, Ørjan Grøttem (2016). Neural tissue discrimination with machine learning methods. Proceedings of the 16th International Conference on Electrical Bioimpedance.  s 71
  • Martinsen, Ørjan Grøttem (2016). The dark side of open access. Journal of Electrical Bioimpedance.  ISSN 1891-5469.  7, s 1- 1 . doi: 10.5617/jeb.2960
  • Martinsen, Ørjan Grøttem; Abie, Sisay Mebre; Bergli, Joakim & Galperin, Yuri (2016). Universality of low frequency conductance of human hair. Proceedings of the 16th International Conference on Electrical Bioimpedance.  s 91
  • Pabst, Oliver & Martinsen, Ørjan Grøttem (2016). Investigating the memristive properties of skin. Proceedings of the 16th International Conference on Electrical Bioimpedance.  s 33
  • Pabst, Oliver; Tronstad, Christian; Martinsen, Ørjan Grøttem & Grimnes, Sverre (2016). Comparison between AC and DC exosomatic EDA measuring methods. Proceedings of the 16th International Conference on Electrical Bioimpedance.  s 65
  • Pettersen, Fred Johan; Martinsen, Ørjan Grøttem; Høgetveit, Jan Olav; Flattum, M.; Kalvøy, Håvard & Odland, Hans Henrik (2016). Using pacemaker leads for bioimpedance and electromyography. Proceedings of the 16th International Conference on Electrical Bioimpedance.  s 73
  • Skjærvø, Øystein; Brandtzæg, Ole Kristian Merkesvik; Martinsen, Ørjan Grøttem; Lundanes, Elsa & Wilson, Steven Ray Haakon (2016). Characterization of polymer layer open tubular columns for liquid chromatography and open tubular enzyme reactors for on-line sample preparation.
  • Skjærvø, Øystein; Wilson, Steven Ray Haakon; Lundanes, Elsa; Brandtzaeg, Ole Kristian & Martinsen, Ørjan Grøttem (2016). Characterization of open tubular enzyme reactors and polymer layer open tubular columns for liquid chromatography. Show summary
  • Strand-Amundsen, Runar James; Tronstad, Christian; Martinsen, Ørjan Grøttem; Høgetveit, Jan Olav; Ruud, TE & Tønnessen, Tor Inge (2016). Bioimpedance - in vivo vs in vitro ischemic small intestine. Proceedings of the 16th International Conference on Electrical Bioimpedance.  s 53
  • Tronstad, Christian; Elvebakk, Ole; Martinsen, Ørjan Grøttem; Kalvøy, Håvard & Høgetveit, Jan Olav (2016). Bioimpedance for prediction of hypoglycemic trends. Proceedings of the 16th International Conference on Electrical Bioimpedance.
  • Adamczak, Malgorzata Iwona; Hagesæther, Ellen; Hiorth, Marianne; Martinsen, Ørjan Grøttem; Sediqi, Nadia & Smistad, Gro (2015). Chitosan-based nanoparticles and chitosan-coated liposomes for drug delivery to the oral cavity.
  • Canali, Chiara; Muhammad, H. B.; Heiskanen, A.; Mazzoni, C.; Ceccarelli, L.; Martinsen, Ørjan Grøttem; Wolff, A.; Dufva, M. & Emneus, Jenny (2015). Electrical impedance spectroscopy with optimised electrode configurations for 3D tissue engineering applications.
  • Canali, Chiara; Muhammad, H. B.; Heiskanen, Arto; Mazzoni, C.; Ceccarelli, L.; Martinsen, Ørjan Grøttem; Holder, D.; Wolff, A.; Dufva, M. & Emneus, Jenny (2015). Enhanced multielectrode configurations in miniaturized 3D electrical impedance spectroscopy and tomography - monitoring the overall process of tissue engineering with spatial sensing for future challenges in microfluidics.
  • Caviglia, C.; Canali, Chiara; Zor, K.; Muhammad, H. B.; Heiskanen, Arto; Martinsen, Ørjan Grøttem; Andresen, T. L.; Wolff, A.; Dufva, M. & Emneus, Jenny (2015). On-line monitoring of 2D and 3D cell cultures: electrode configurations for impedance based sensors.
  • Elvebakk, Ole; Tronstad, Christian; Gulseth, Hanne Løvdal; Jenssen, Trond Geir; Bjørgaas, Marit Ragnhild Rokne; Høgetveit, Jan Olav; Martinsen, Ørjan Grøttem & Birkeland, Kåre I. (2015). Physiological and symptomatic responses to hypoglycemia in patients with impaired awareness.
  • Kalvøy, Håvard; Aliau-Bonet, C.; Pallas-Areny, R. & Martinsen, Ørjan Grøttem (2015). Effects of stray capacitance to ground in three electrode monopolar needle bioimpedance measurements.
  • Pettersen, Fred Johan; Martinsen, Tormod; Høgetveit, Jan Olav & Martinsen, Ørjan Grøttem (2015). Unintentional heating at implants when using electrosurgery.
  • Tronstad, Christian; Staal, Odd Martin; Sælid, Steinar & Martinsen, Ørjan Grøttem (2015). Model-based filtering for artifact and noise suppression with state estimation for electrodermal activity measurements in real time.
  • Canali, Chiara; Martinsen, Ørjan Grøttem; Muhammad, H.B.; Heiskanen, A.; Dufva, M; Wolff, A. & Emneus, Jenny (2014). A multiplexed electrical impedance-based device for bioengineering applications..
  • Karstang, Terje V.; Sælid, Steinar; Lie, Martin F.; Dahlback, Jørgen; Berg, Bjørn; Øhlckers, Per; Jacobsen, Morten & Martinsen, Ørjan Grøttem (2014). A new device for continuous non-invasive blood glucose estimation based on sensor fusion. Show summary
  • Abir, R.; Pettersen, Fred Johan; Martinsen, Ørjan Grøttem & Rabbani, K. S. (2013). Effect of a spherical object in 4 electrode Focused Impedance Method (FIM): measurement and simulation.
  • Amoussou-Guenou, Kuassi M.; Houndetoungan, G. D.; Fachinan, O. H.; Kalvøy, Håvard & Martinsen, Ørjan Grøttem (2013). Comparison of two filtration methods in erythrocyte deformability: determination measurement using impedancemetry.
  • Elvebakk, Ole; Tronstad, Christian; Høgetveit, Jan Olav; Jenssen, Trond Geir; Bjørgaas, Marit & Martinsen, Ørjan Grøttem (2013). Sweating reactions due to hypoglycemia detected by skin AC conductance.
  • Grimnes, Sverre & Martinsen, Ørjan Grøttem (2013). Some thoughts on bioimpedance and bioelectricity. Journal of Electrical Bioimpedance.  ISSN 1891-5469.  4, s 1- 1
  • Hajnsek, Martin; Schwingenschuh, Simon; Scharfetter, Hermann; Martinsen, Ørjan Grøttem; Tiffner, Katrin; Dragatin, Christian; Raml, Reingard; Mautner, Anton; Bodenlenz, Manfred & Sinner, Frank (2013). Skin impedance measurements support ex-vivo penetration studies for topical applied drugs.
  • Kalvøy, Håvard; Tronstad, Christian; Grimnes, Sverre & Martinsen, Ørjan Grøttem (2013). Simultaneous measurement of DC potential and AC conductance to monitor electrodermal activity at a single electrode.
  • Martinsen, Ørjan Grøttem; Grimnes, Sverre; Bergli, Joakim & Galperin, Yuri (2013). Universality in the electrical conductance of human hair.
  • Nordbotten, Bernt Jørgen; Tronstad, Christian; Martinsen, Ørjan Grøttem & Grimnes, Sverre (2013). Estimation of skin conductance at low frequencies from measurements at higher frequencies for EDA application.
  • Pettersen, Fred Johan; Ferdous, Humayra & Martinsen, Ørjan Grøttem (2013). Simulation of 6-electrode and 8-electrode Focused Impedance Method (FIM) using Comsol Multiphysics – A comparative study.
  • Schwingenschuh, Simon; Hajnsek, Martins; Scharfetter, Hermann; Martinsen, Ørjan Grøttem; Tiffner, Katrin; Dragatin, Christian; Raml, Reingard; Mautner, Anton; Bodenlenz, Manfred & Sinner, Frank (2013). Skin impedance measurements support ex-vivo penetration studies for topical applied drugs.
  • Tronstad, Christian; Elvebakk, Ole; Høgetveit, Jan Olav; Jenssen, Trond Geir; Bjørgaas, Marit Ragnhild Rokne & Martinsen, Ørjan Grøttem (2013). Monitoring of sweat activity for detection of severe hypoglycemia – A pilot study.
  • Tronstad, Christian; Kalvøy, Håvard; Grimnes, Sverre & Martinsen, Ørjan Grøttem (2013). Sweat production estimated by bioimpedance and bioelectrical signals.
  • Johnsen, Gorm Krogh; Lutken, Carsten Andrew; Martinsen, Ørjan Grøttem & Grimnes, Sverre (2012). Memristoren – en ny kretskomponent. Fra Fysikkens Verden.  ISSN 0015-9247.
  • Kvaløy, Håvard; Tronstad, Christian; Grimnes, Sverre & Martinsen, Ørjan Grøttem (2012). Electrodermal activity measured as DC potential and AC conductance at the same electrode. International Federation for Medical and Biological Engineering Proceedings.  ISSN 1680-0737.  39
  • Martinsen, Ørjan Grøttem & Grimnes, Sverre (2012). Increasing interest for the Journal of Electrical Bioimpedance. Journal of Electrical Bioimpedance.  ISSN 1891-5469.  3, s 1
  • Martinsen, Ørjan Grøttem; Grimnes, Sverre; Lutken, Carsten Andrew & Johnsen, Gorm Krogh (2012). Using Memristive Elements for Modeling Electrical Properties of Biological Tissue. Progress in Electromagnetics Research Symposium.  ISSN 1559-9450.  s 660
  • Tronstad, Christian; Kvaløy, Håvard; Martinsen, Ørjan Grøttem & Grimnes, Sverre (2012). New parameters of electrodermal activity and estimation of sweat production. International Federation for Medical and Biological Engineering Proceedings.  ISSN 1680-0737.  39
  • Grimnes, Sverre & Martinsen, Ørjan Grøttem (2010). Journal of Electrical Bioimpedance (JEB) - a new, open access, scientific journal. Journal of Electrical Bioimpedance.  ISSN 1891-5469.  1, s 1- 1
  • Martinsen, Ørjan Grøttem (2010). Impedance basics, instrumentation and electrode systems.

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Published Nov. 4, 2010 12:25 PM - Last modified June 8, 2018 10:09 PM