Publications 2024

Bari DS, Aldosky HYY, Tronstad C, Martinsen ØG (2024)
Disturbances in Electrodermal Activity Recordings Due to Different Noises in the Environment
Sensors (Basel), 24 (16)
DOI 10.3390/s24165434, PubMed 39205128

Hou J, Nesaragi N, Tronstad C (2024)
Electrical bioimpedance in the era of artificial intelligence
J Electr Bioimpedance, 15 (1), 1-3
DOI 10.2478/joeb-2024-0001, PubMed 38304720

Jerve FW, Hjelme DR, Kalvøy H, Allen J, Tronstad C (2024)
Exploration of the Conditions for Occurrence of Photoplethysmographic Signal Inversion above the Dorsalis Pedis Artery
Sensors (Basel), 24 (20)
DOI 10.3390/s24206505, PubMed 39459987

Publications 2023

Kildal ESM, Quintana DS, Szabo A, Tronstad C, Andreassen O, Nærland T, Hassel B (2023)
Heart rate monitoring to detect acute pain in non-verbal patients: a study protocol for a randomized controlled clinical trial
BMC Psychiatry, 23 (1), 252
DOI 10.1186/s12888-023-04757-1, PubMed 37060049

Tronstad C, Amini M, Olesen E, Qvigstad E, Pabst O, Martinsen T, Abie SM, Martinsen ØG, Hisdal J, Jenssen TG, Kalvøy H (2023)
Diabetic Foot Assessment using Skin Impedance in a Custom Made Sensor-sock
J Electr Bioimpedance, 13 (1), 136-142
DOI 10.2478/joeb-2022-0019, PubMed 36694878

Publications 2022

Azulay N, Olsen RB, Nielsen CS, Stubhaug A, Jenssen TG, Schirmer H, Frigessi A, Rosseland LA, Tronstad C (2022)
Reduced heart rate variability is related to the number of metabolic syndrome components and manifest diabetes in the sixth Tromsø study 2007-2008
Sci Rep, 12 (1), 11998
DOI 10.1038/s41598-022-15824-0, PubMed 35835836

Hou J, Strand-Amundsen R, Tronstad C, Tønnessen TI, Høgetveit JO, Martinsen ØG (2022)
Small intestinal viability assessment using dielectric relaxation spectroscopy and deep learning
Sci Rep, 12 (1), 3279
DOI 10.1038/s41598-022-07140-4, PubMed 35228559

Tronstad C, Amini M, Bach DR, Martinsen ØG (2022)
Current trends and opportunities in the methodology of electrodermal activity measurement
Physiol Meas, 43 (2)
DOI 10.1088/1361-6579/ac5007, PubMed 35090148

Tronstad C, Pabst O, Amini M, Kleggetveit IP, Elvebakk O, Martinsen OG, Jenssen TG, Hisdal J, Berg TJ, Qvigstad E (2022)
Development of a prototype toe sensor for detection of diabetic peripheral small fiber neuropathy
Annu Int Conf IEEE Eng Med Biol Soc, 2022, 99-104
DOI 10.1109/EMBC48229.2022.9871101, PubMed 36086669

Publications 2021

Haidl F, Tronstad C, Rosseland LA, Dahl V (2021)
Maternal haemodynamics during labour epidural analgesia with and without adrenaline
Scand J Pain, 21 (4), 680-687
DOI 10.1515/sjpain-2020-0176, PubMed 33964196

Hou J, Strand-Amundsen R, Tronstad C, Høgetveit JO, Martinsen ØG, Tønnessen TI (2021)
Automatic Prediction of Ischemia-Reperfusion Injury of Small Intestine Using Convolutional Neural Networks: A Pilot Study
Sensors (Basel), 21 (19)
DOI 10.3390/s21196691, PubMed 34641009

Ibba P, Tronstad C, Moscetti R, Mimmo T, Cantarella G, Petti L, Martinsen ØG, Cesco S, Lugli P (2021)
Supervised binary classification methods for strawberry ripeness discrimination from bioimpedance data
Sci Rep, 11 (1), 11202
DOI 10.1038/s41598-021-90471-5, PubMed 34045542

Jacobsen FA, Hafli EW, Tronstad C, Martinsen ØG (2021)
Classification of Emotions Based on Electrodermal Activity and Transfer Learning - a Pilot Study
J Electr Bioimpedance, 12 (1), 178-183
DOI 10.2478/joeb-2021-0021, PubMed 35111273

Michelsen TM, Tronstad C, Rosseland LA (2021)
Blood pressure and cardiac output during caesarean delivery under spinal anaesthesia: a prospective cohort study
BMJ Open, 11 (6), e046102
DOI 10.1136/bmjopen-2020-046102, PubMed 34127491

Singstad BJ, Azulay N, Bjurstedt A, Bjørndal SS, Drageseth MF, Engeset P, Eriksen K, Gidey MY, Granum EO, Greaker MG, Grorud A, Hewes SO, Hou J, Llop Recha AM, Matre C, Seputis A, Sørensen SE, Thøgersen V, Joten VM, Tronstad C, Martinsen ØG (2021)
Estimation of Heart Rate Variability from Finger Photoplethysmography During Rest, Mild Exercise and Mild Mental Stress
J Electr Bioimpedance, 12 (1), 89-102
DOI 10.2478/joeb-2021-0012, PubMed 35069945

Strand-Amundsen R, Tronstad C, Elvebakk O, Martinsen T, Dybwad M, Lingaas E, Tønnessen TI (2021)
Quantification of aerosol dispersal from suspected aerosol-generating procedures
ERJ Open Res, 7 (4)
DOI 10.1183/23120541.00206-2021, PubMed 34877350

Wiegerinck AIP, Thomsen A, Hisdal J, Kalvøy H, Tronstad C (2021)
Electrical Impedance Plethysmography Versus Tonometry To Measure the Pulse Wave Velocity in Peripheral Arteries in Young Healthy Volunteers: a Pilot Study
J Electr Bioimpedance, 12 (1), 169-177
DOI 10.2478/joeb-2021-0020, PubMed 35111272

Publications 2020

Amini M, Niemi E, Hisdal J, Kalvøy H, Tronstad C, Scholz H, Rosales A, Martinsen ØG (2020)
Monitoring the quality of frozen-thawed venous segments using bioimpedance spectroscopy
Physiol Meas, 41 (4), 044008
DOI 10.1088/1361-6579/ab85b7, PubMed 32235072

Bari DS, Aldosky HYY, Tronstad C, Martinsen ØG (2020)
The correlations among the skin conductance features responding to physiological stress stimuli
Skin Res Technol, 27 (4), 582-588
DOI 10.1111/srt.12989, PubMed 33381876

Omenås IN, Tronstad C, Rosseland LA (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 Anesthesiol, 20 (1), 157
DOI 10.1186/s12871-020-01078-8, PubMed 32593297

Singstad BJ, Tronstad C (2020)
Convolutional Neural Network and Rule-Based Algorithms for Classifying 12-lead ECGs
COMPUT CARDIOL CONF, 227
DOI 10.22489/CinC.2020.227

Publications 2019

Andersen JH, Bjerke O, Blakaj F, Flugsrud VM, Jacobsen FA, Jonsson M, Kosaka EN, Langstrand PA, Martinsen ØG, Moen AS, Moen EQZ, Nystad ØK, Olesen E, Qureshi M, Risopatron VJØ, Ruud SK, Stensø N, Winje FL, Winness EV, Abie S, Joten VM, Tronstad C, Elvebakk O, Martinsen ØG (2019)
Bioimpedance and NIR for Non-invasive Assessment of Blood Glucose
J Electr Bioimpedance, 10 (1), 133-138
DOI 10.2478/joeb-2019-0019, PubMed 33584894

Aria S, Elfarri Y, Elvegård M, Gottfridsson A, Grønaas HS, Harang S, Jansen A, Madland TER, Martins IB, Olstad MW, Ryan TL, Shaban AN, Svenningsen ØL, Sørensen AD, Ulvestad EH, Vister OM, Øvergaard MB, Kalvøy H, Pettersen FJ, Odland HH, Joten VM, Martinsen ØG, Tronstad C, Elvebakk O, Martinsen ØG (2019)
Measuring Blood Pulse Wave Velocity with Bioimpedance in Different Age Groups
Sensors (Basel), 19 (4)
DOI 10.3390/s19040850, PubMed 30791368

Bjørhei A, Pedersen FT, Muhammad S, Tronstad C, Kalvøy H, Wojniusz S, Pabst O, Sütterlin S (2019)
An Investigation on Bilateral Asymmetry in Electrodermal Activity
Front Behav Neurosci, 13, 88
DOI 10.3389/fnbeh.2019.00088, PubMed 31133830

Elvebakk O, Tronstad C, Birkeland KI, Jenssen TG, Bjørgaas MR, Frøslie KF, Godang K, Kalvøy H, Martinsen ØG, Gulseth HL (2019)
Author Correction: Evaluation of Hypoglycaemia with Non-Invasive Sensors in People with Type 1 Diabetes and Impaired Awareness of Hypoglycaemia
Sci Rep, 9 (1), 6347
DOI 10.1038/s41598-019-42218-6, PubMed 30988313

Elvebakk O, Tronstad C, Birkeland KI, Jenssen TG, Bjørgaas MR, Gulseth HL, Kalvøy H, Høgetveit JO, Martinsen ØG (2019)
A multiparameter model for non-invasive detection of hypoglycemia
Physiol Meas, 40 (8), 085004
DOI 10.1088/1361-6579/ab3676, PubMed 31357185

Martinsen T, Pettersen FJ, Kalvøy H, Tronstad C, Kvarstein G, Bakken A, Høgetveit JO, Martinsen ØG, Grimnes S, Frich L (2019)
Electrosurgery and Temperature Increase in Tissue With a Passive Metal Implant
Front Surg, 6, 8
DOI 10.3389/fsurg.2019.00008, PubMed 30915337

Martinsen ØG, Kalvøy H, Bari DS, Tronstad C (2019)
A Circuit for Simultaneous Measurements of Skin Electrical Conductance, Susceptance, and Potential
J Electr Bioimpedance, 10 (1), 110-112
DOI 10.2478/joeb-2019-0016, PubMed 33584891

Tronstad C, Høgetveit JO, Elvebakk O, Kalvøy H (2019)
Age-related Differences in the Morphology of the Impedance Cardiography Signal
J Electr Bioimpedance, 10 (1), 139-145
DOI 10.2478/joeb-2019-0020, PubMed 33584895

Tronstad C, Strand-Amundsen R (2019)
Possibilities in the Application of Machine Learning on Bioimpedance Time-series
J Electr Bioimpedance, 10 (1), 24-33
DOI 10.2478/joeb-2019-0004, PubMed 33584879

Publications 2018

Bari DS, Aldosky HYY, Tronstad C, Kalvøy H, Martinsen ØG (2018)
Influence of Relative Humidity on Electrodermal Levels and Responses
Skin Pharmacol Physiol, 31 (6), 298-307
DOI 10.1159/000492275, PubMed 30179872

Bari DS, Aldosky HYY, Tronstad C, Kalvøy H, Martinsen ØG (2018)
Electrodermal Activity Responses for Quantitative Assessment of Felt Pain
J Electr Bioimpedance, 9 (1), 52-58
DOI 10.2478/joeb-2018-0010, PubMed 33584921

Bruehl S, Olsen RB, Tronstad C, Sevre K, Burns JW, Schirmer H, Nielsen CS, Stubhaug A, Rosseland LA (2018)
Chronic pain-related changes in cardiovascular regulation and impact on comorbid hypertension in a general population: the Tromsø study
Pain, 159 (1), 119-127
DOI 10.1097/j.pain.0000000000001070, PubMed 28953193

Elvebakk O, Tronstad C, Birkeland KI, Jenssen TG, Bjørgaas MR, Frøslie KF, Godang K, Kalvøy H, Martinsen ØG, Gulseth HL (2018)
Evaluation of Hypoglycaemia with Non-Invasive Sensors in People with Type 1 Diabetes and Impaired Awareness of Hypoglycaemia
Sci Rep, 8 (1), 14722
DOI 10.1038/s41598-018-33189-1, PubMed 30283093

Strand-Amundsen RJ, Tronstad C, Kalvøy H, Ruud TE, Høgetveit JO, Martinsen ØG, Tønnessen TI (2018)
Small intestinal ischemia and reperfusion-bioimpedance measurements
Physiol Meas, 39 (2), 025001
DOI 10.1088/1361-6579/aaa576, PubMed 29303488

Strand-Amundsen RJ, Tronstad C, Reims HM, Reinholt FP, Høgetveit JO, Tønnessen TI (2018)
Machine learning for intraoperative prediction of viability in ischemic small intestine
Physiol Meas, 39 (10), 105011
DOI 10.1088/1361-6579/aae0ea, PubMed 30207981

Tronstad C, Elvebakk O, Staal OM, Kalvøy H, Høgetveit JO, Jenssen TG, Birkeland KI, Martinsen ØG (2018)
Non-invasive prediction of blood glucose trends during hypoglycemia
Anal Chim Acta, 1052, 37-48
DOI 10.1016/j.aca.2018.12.009, PubMed 30685040

Publications 2017

Bari DS, Aldosky HYY, Tronstad C, Kalvøy H, Martinsen ØG (2017)
Electrodermal responses to discrete stimuli measured by skin conductance, skin potential, and skin susceptance
Skin Res Technol, 24 (1), 108-116
DOI 10.1111/srt.12397, PubMed 28776764

Kalvoy H, Tronstad C, Ullensvang K, Steinfeldt T, Sauter AR (2017)
Detection of needle to nerve contact based on electric bioimpedance and machine learning methods
Annu Int Conf IEEE Eng Med Biol Soc, 2017, 9-12
DOI 10.1109/EMBC.2017.8036750, PubMed 29059798

Pabst O, Tronstad C, Martinsen OG (2017)
Instrumentation, electrode choice and challenges in human skin memristor measurement
Annu Int Conf IEEE Eng Med Biol Soc, 2017, 1844-1848
DOI 10.1109/EMBC.2017.8037205, PubMed 29060249

Strand-Amundsen RJ, Reims HM, Tronstad C, Kalvøy H, Martinsen ØG, Høgetveit JO, Ruud TE, Tønnessen TI (2017)
Ischemic small intestine-in vivo versus ex vivo bioimpedance measurements
Physiol Meas, 38 (5), 715-728
DOI 10.1088/1361-6579/aa67b7, PubMed 28319030

Tronstad C, Elvebakk O, Kalvoy H, Bjorgaas MR, Martinsen OG (2017)
Detection of sympathoadrenal discharge by parameterisation of skin conductance and ECG measurement
Annu Int Conf IEEE Eng Med Biol Soc, 2017, 3997-4000
DOI 10.1109/EMBC.2017.8037732, PubMed 29060773

Publications 2016

Nygaard K, Thiara AS, Tronstad C, Ringdal MA, Fiane AE (2016)
VAVD vacuum may cause bubble transgression in membrane oxygenators
Perfusion, 31 (8), 648-652
DOI 10.1177/0267659116651345, PubMed 27226328

Pabst O, Tronstad C, Grimnes S, Fowles D, Martinsen ØG (2016)
Comparison between the AC and DC measurement of electrodermal activity
Psychophysiology, 54 (3), 374-385
DOI 10.1111/psyp.12803, PubMed 28000290

Strand-Amundsen RJ, Tronstad C, Kalvøy H, Gundersen Y, Krohn CD, Aasen AO, Holhjem L, Reims HM, Martinsen ØG, Høgetveit JO, Ruud TE, Tønnessen TI (2016)
In vivo characterization of ischemic small intestine using bioimpedance measurements
Physiol Meas, 37 (2), 257-75
DOI 10.1088/0967-3334/37/2/257, PubMed 26805916

Publications 2015

Martinsen G, Pabst O, Tronstad C, Grimnes S (2015)
Sources of error in AC measurement of skin conductance
Journal of Electrical Bioimpedance, 6 (2015), 49-53
DOI 10.5617/jeb.2640, PublikaID 230

Tronstad C, Omenås IN, Rosseland LA (2015)
An improved artifact removal algorithm for continuous cardiac output and blood pressure recordings
Annu Int Conf IEEE Eng Med Biol Soc, 2015, 5968-72
DOI 10.1109/EMBC.2015.7319751, PubMed 26737651

Tronstad C, Staal OM, Saelid S, Martinsen OG (2015)
Model- based filtering for artifact and noise suppression with state estimation for electrodermal activity measurements in real time
Annu Int Conf IEEE Eng Med Biol Soc, 2015, 2750-3
DOI 10.1109/EMBC.2015.7318961, PubMed 26736861

Publications 2014

Nordbotten BJ, Tronstad C, Martinsen ØG, Grimnes S (2014)
Estimation of skin conductance at low frequencies using measurements at higher frequencies for EDA applications
Physiol Meas, 35 (6), 1011-8
DOI 10.1088/0967-3334/35/6/1011, PubMed 24844405

Pischke SE, Hyler S, Tronstad C, Bergsland J, Fosse E, Halvorsen PS, Skulstad H, Tønnessen TI (2014)
Myocardial tissue CO2 tension detects coronary blood flow reduction after coronary artery bypass in real-time†
Br J Anaesth, 114 (3), 414-22
DOI 10.1093/bja/aeu381, PubMed 25392231

Tronstad C, Helsing P, Tønseth KA, Grimnes S, Krogstad AL (2014)
Tumescent suction curettage vs. curettage only for treatment of axillary hyperhidrosis evaluated by subjective and new objective methods
Acta Derm Venereol, 94 (2), 215-20
DOI 10.2340/00015555-1671, PubMed 24002584

Tronstad C, Pripp AH (2014)
Statistical methods for bioimpedance analysis
J Electr Bioimp, 5, 14–27
DOI 10.5617/jeb.830, PublikaID 218

Publications 2013

Tronstad C, Kalvøy H, Grimnes S, Martinsen Ø (2013)
Improved estimation of sweating based on electrical properties of skin
Ann Biomed Eng, 41 (5), 1074-83
DOI 10.1007/s10439-013-0743-4, PubMed 23325304

Tronstad C, Kalvøy H, Grimnes S, Martinsen ØG (2013)
Waveform difference between skin conductance and skin potential responses in relation to electrical and evaporative properties of skin
Psychophysiology, 50 (11), 1070-8
DOI 10.1111/psyp.12092, PubMed 23889171

Publications 2012

Pischke SE, Tronstad C, Holhjem L, Halvorsen PS, Tønnessen TI (2012)
Perioperative detection of myocardial ischaemia/reperfusion with a novel tissue CO2 monitoring technology
Eur J Cardiothorac Surg, 42 (1), 157-63
DOI 10.1093/ejcts/ezr278, PubMed 22290904

Pischke SE, Tronstad C, Holhjem L, Line PD, Haugaa H, Tønnessen TI (2012)
Hepatic and abdominal carbon dioxide measurements detect and distinguish hepatic artery occlusion and portal vein occlusion in pigs
Liver Transpl, 18 (12), 1485-94
DOI 10.1002/lt.23544, PubMed 22961940

Publications 2011

Grimnes S, Jabbari A, Martinsen ØG, Tronstad C (2011)
Electrodermal activity by DC potential and AC conductance measured simultaneously at the same skin site
Skin Res Technol, 17 (1), 26-34
DOI 10.1111/j.1600-0846.2010.00459.x, PubMed 20923453

Nordbotten BJ, Tronstad C, Martinsen Ø, Grimnes S (2011)
Evaluation of algorithms for calculating bioimpedance phase angle values from measured whole-body impedance modulus
Physiol Meas, 32 (7), 755-65
DOI 10.1088/0967-3334/32/7/S03, PubMed 21646707

Publications 2010

Kalvøy H, Tronstad C, Nordbotten B, Grimnes S, Martinsen ØG (2010)
Electrical impedance of stainless steel needle electrodes
Ann Biomed Eng, 38 (7), 2371-82
DOI 10.1007/s10439-010-9989-2, PubMed 20217478

Tronstad C, Johnsen GK, Grimnes S, Martinsen ØG (2010)
A study on electrode gels for skin conductance measurements
Physiol Meas, 31 (10), 1395-410
DOI 10.1088/0967-3334/31/10/008, PubMed 20811086

Tronstad C, Pischke SE, Holhjem L, Tønnessen TI, Martinsen OG, Grimnes S (2010)
Early detection of cardiac ischemia using a conductometric pCO(2) sensor: real-time drift correction and parameterization
Physiol Meas, 31 (9), 1241-55
DOI 10.1088/0967-3334/31/9/013, PubMed 20702916

Publications 2009

Grimnes S, Martinsen OG, Tronstad C (2009)
Noise properties of the 3-electrode skin admittance measuring circuit
IFMBE PROC, 22 (1-3), 720-722

Publications 2008

Martinsen ØG, Grimnes S, Nilsen JK, Tronstad C, Jang W, Kim H, Shin K, Naderi M, Thielmann F (2008)
Gravimetric method for in vitro calibration of skin hydration measurements
IEEE Trans Biomed Eng, 55 (2 Pt 1), 728-32
DOI 10.1109/TBME.2007.912651, PubMed 18270010

Tronstad C, Gjein GE, Grimnes S, Martinsen ØG, Krogstad AL, Fosse E (2008)
Electrical measurement of sweat activity
Physiol Meas, 29 (6), S407-15
DOI 10.1088/0967-3334/29/6/S34, PubMed 18544832

Tronstad C, Martinsen OG, Grimnes S (2008)
Embedded instrumentation for skin admittance measurement
Annu Int Conf IEEE Eng Med Biol Soc, 2008, 2373-6
DOI 10.1109/IEMBS.2008.4649676, PubMed 19163179

Publications 2007

Martinsen OG, Grimnes S, Nilsen JK, Tronstad C, Jang W, Kim H, Shin K (2007)
Calibration of skin hydration measurements
IFMBE PROC, 17, 161-+

Tronstad C, Grimnes S, Martinsen OG, Fosse E (2007)
Developmeut of a medical device for long-term sweat activity measurements
IFMBE PROC, 17, 236-+