Christian Tronstad
English version of this page
Brukernavn
Besøksadresse
Sem Sælands vei 24
Fysikkbygningen
0371 OSLO
Postadresse
Postboks 1048 Blindern
0316 OSLO
Publikasjoner
- Amini, Maryam; Niemi, Essi; Hisdal, Jonny; Kalvøy, Håvard; Tronstad, Christian; Scholz, Hanne; Rosales, Antonio & Martinsen, Ørjan Grøttem (2020). Monitoring the quality of frozen-thawed venous segments using bioimpedance spectroscopy. Physiological Measurement. ISSN 0967-3334. . doi: 10.1088/1361-6579/ab85b7
- Bari, Dindar S.; Aldosky, Haval Y. Yacoob; Tronstad, Christian & Martinsen, Ørjan Grøttem (2020). The correlations among the skin conductance features responding to physiological stress stimuli. Skin research and technology. ISSN 0909-752X. s 1- 7 . doi: 10.1111/srt.12989
- Omenås, Ivar Nagelgaard; Tronstad, Christian & Rosseland, Leiv Arne (2020). Accuracy and trending abilities of finger plethysmographic blood pressure and cardiac output compared to invasive measurements during caesarean delivery in healthy women: An observational study. BMC Anesthesiology. ISSN 1471-2253. 20(157) . doi: 10.1186/s12871-020-01078-8 Fulltekst i vitenarkiv.
- 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 (2019). Bioimpedance and NIR for non-invasive assessment of blood glucose. Journal of Electrical Bioimpedance. ISSN 1891-5469. 10, s 133- 138 . doi: 10.2478/joeb-2019-0019
- 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 (2019). Measuring blood pulse wave velocity with bioimpedance in different age groups. Sensors. ISSN 1424-8220. 19:850(4), s 1- 10 . doi: 10.3390/s19040850 Fulltekst i vitenarkiv.
- Bjørhei, Andreas; Pedersen, Filip T.; Muhammad, Saeed; Tronstad, Christian; Kalvøy, Håvard; Wojniusz, Slawomir; Pabst, Oliver & Sütterlin, Stefan (2019). An investigation on bilateral asymmetry in electrodermal activity. Frontiers in Behavioral Neuroscience. ISSN 1662-5153. 13(88) . doi: 10.3389/fnbeh.2019.00088 Fulltekst i vitenarkiv.
- 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 (2019). A multiparameter model for non-invasive detection of hypoglycemia. Physiological Measurement. ISSN 0967-3334. 40(8), s 1- 14 . doi: 10.1088/1361-6579/ab3676 Fulltekst i vitenarkiv.
- Martinsen, Tormod; Pettersen, Fred-Johan; Kalvøy, Håvard; Tronstad, Christian; Kvarstein, Gunnvald; Bakken, André; Høgetveit, Jan Olav; Martinsen, Ørjan Grøttem; Grimnes, Sverre & Frich, Lars Inge (2019). Electrosurgery and temperature increase in tissue with a passive metal implant. Frontiers in surgery. ISSN 2296-875X. 6:8, s 1- 8 . doi: 10.3389/fsurg.2019.00008 Fulltekst i vitenarkiv.
- Martinsen, Ørjan Grøttem; Kalvøy, Håvard; Bari, Dindar S. & Tronstad, Christian (2019). A circuit for simultaneous measurements of skin electrical conductance, susceptance, and potential. Journal of Electrical Bioimpedance. ISSN 1891-5469. 10, s 110- 112 . doi: 10.2478/joeb-2019-0016 Fulltekst i vitenarkiv.
- Tronstad, Christian; Elvebakk, Ole; Staal, Odd Martin; Kalvøy, Håvard; Høgetveit, Jan Olav; Jenssen, Trond Geir; Birkeland, Kåre I. & Martinsen, Ørjan Grøttem (2019). Non-invasive prediction of blood glucose trends during hypoglycemia. Analytica Chimica Acta. ISSN 0003-2670. 1052, s 37- 48 . doi: 10.1016/j.aca.2018.12.009
- Tronstad, Christian; Høgetveit, Jan Olav; Elvebakk, Ole & Kalvøy, Håvard (2019). Age-related differences in the morphology of the impedance cardiography signal. Journal of Electrical Bioimpedance. ISSN 1891-5469. 10(1), s 139- 145 . doi: 10.2478/joeb-2019-0020 Fulltekst i vitenarkiv.
- Tronstad, Christian & Strand-Amundsen, Runar James (2019). Possibilities in the application of machine learning on bioimpedance time-series. Journal of Electrical Bioimpedance. ISSN 1891-5469. 10(1), s 24- 33 . doi: 10.2478/joeb-2019-0004
- Bari, D. S.; Aldosoky, H. Y. Y.; Tronstad, Christian; Kalvøy, Håvard & Martinsen, Ørjan Grøttem (2018). Electrodermal activity responses for quantitative assessment of felt pain. Journal of Electrical Bioimpedance. ISSN 1891-5469. 9, s 52- 58 . doi: 10.2478/joeb-2018-0010 Fulltekst i vitenarkiv.
- 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. 31, s 298- 307 . doi: 10.1159/000492275
- Bruehl, Stephen; Bjørkholt Olsen, Roy; Tronstad, Christian; Sevre, Knut; Burns, John W; Schirmer, Henrik; Nielsen, Christopher Sivert; Stubhaug, Audun & Rosseland, Leiv Arne (2018). Chronic pain-related changes in cardiovascular regulation and impact on comorbid hypertension in a general population: the Tromsø study. Pain. ISSN 0304-3959. 159(1), s 119- 127 . doi: 10.1097/j.pain.0000000000001070 Fulltekst i vitenarkiv.
- 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 Fulltekst i vitenarkiv.
- 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 Fulltekst i vitenarkiv.
- Strand-Amundsen, Runar James; Tronstad, Christian; Reims, Henrik Mikael; Reinholt, Finn P.; Høgetveit, Jan Olav & Tønnessen, Tor Inge (2018). Machine learning for intraoperative prediction of viability in ischemic small intestine. Physiological Measurement. ISSN 0967-3334. 39(10), s 1- 16 . doi: 10.1088/1361-6579/aae0ea Fulltekst i vitenarkiv.
- 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
- Kalvøy, Håvard; Tronstad, Christian; Ullensvang, Kyrre; Steinfeldt, Thorsten & Sauter, Axel Rudolf (2017). Detection of needle to nerve contact based on electric bioimpedance and machine learning methods. IEEE Engineering in Medicine and Biology Society. Conference Proceedings. ISSN 1557-170X. s 9- 12 . doi: 10.1109/EMBC.2017.8036750
- 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
- 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
- Nygaard, Kent Inge; Thiara, Amrit Paul Singh; Tronstad, Christian; Ringdal, Mari-Anne I Lindstein & Fiane, Arnt E (2016). VAVD vacuum may cause bubble transgression in membrane oxygenators. Perfusion. ISSN 0267-6591. 31(8), s 648- 652 . doi: 10.1177/0267659116651345
- 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 Vis sammendrag
- 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
- Pischke, Søren Erik; Hyler, Stefan; Tronstad, Christian; Bergsland, Jacob; Fosse, Erik; Halvorsen, Per Steinar; Skulstad, Helge & Tønnessen, Tor Inge (2015). Myocardial tissue CO2 tension detects coronary blood flow reduction after coronary artery bypass in real-time. British Journal of Anaesthesia. ISSN 0007-0912. 114(3), s 414- 422 . doi: 10.1093/bja/aeu381
- Tronstad, Christian; Omenås, Ivar Nagelgaard & Rosseland, Leiv Arne (2015). An improved artifact removal algorithm for continuous cardiac output and blood pressure recordings. IEEE Engineering in Medicine and Biology Society. Conference Proceedings. ISSN 1557-170X. 2015-November, s 5968- 5972 . doi: 10.1109/EMBC.2015.7319751
- 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
- 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
- Tronstad, Christian; Helsing, Per; Tønseth, Kim Aleksander; Grimnes, Sverre & Polesie, Anne Lene Krogstad (2014). Tumescent suction curettage vs. curettage only for treatment of axillary hyperhidrosis evaluated by subjective and new objective methods. Acta Dermato-Venereologica. ISSN 0001-5555. 94(2), s 215- 220 . doi: 10.2340/00015555-1671
- Tronstad, Christian & Pripp, Are Hugo (2014). Statistical methods for bioimpedance analysis. Journal of Electrical Bioimpedance. ISSN 1891-5469. 5(1), s 14- 27 . doi: 10.5617/jeb.830
- 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
- Pischke, Søren Erik; Tronstad, Christian; Holhjem, Lars; Halvorsen, Per Steinar & Tønnessen, Tor Inge (2012). Perioperative detection of myocardial ischaemia/reperfusion with a novel tissue CO2 monitoring technology. European Journal of Cardio-Thoracic Surgery. ISSN 1010-7940. 42(1), s 157- 163 . doi: 10.1093/ejcts/ezr278
- Pischke, Søren Erik; Tronstad, Christian; Holhjem, Lars; Line, Pål Dag; Haugaa, Håkon & Tønnessen, Tor Inge (2012). Hepatic and Abdominal Carbon Dioxide Measurements Detect and Distinguish Hepatic Artery Occlusion and Portal Vein Occlusion in Pigs. Liver transplantation. ISSN 1527-6465. 18(12), s 1485- 1494 . doi: 10.1002/lt.23544
- 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
- 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
- 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
- Tronstad, Christian; Grimnes, Sverre; Martinsen, Ørjan Grøttem; Amundsen, Vegar & Wojniusz, Slawomir (2010). PC-based instrumentation for electrodermal activity measurement. Journal of Physics: Conference Series. ISSN 1742-6588. 224 . doi: 10.1088/1742-6596/224/1/012093 Vis sammendrag
- Tronstad, Christian; Johnsen, Gorm Krogh; Grimnes, Sverre & Martinsen, Ørjan Grøttem (2010). A study on electrode gels for skin conductance measurements. Physiological Measurement. ISSN 0967-3334. 31(10), s 1395- 1410 . doi: 10.1088/0967-3334/31/10/008
- Tronstad, Christian; Pischke, Søren Erik; Holhjem, L; Tønnessen, Tor Inge; Martinsen, Ørjan Grøttem & Grimnes, Sverre (2010). Early detection of cardiac ischemia using a conductometric pCO(2) sensor: real-time drift correction and parameterization. Physiological Measurement. ISSN 0967-3334. 31(9), s 1241- 1255 . doi: 10.1088/0967-3334/31/9/013
- 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.
- 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
- 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
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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.
- 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
- Tronstad, Christian (2012). 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.
- 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
Publisert 6. des. 2011 13:07
- Sist endret 10. sep. 2012 12:15