Publications 2023

Kvarstein G, Kindlundh-Högberg AM, Ould Setti M, Namane R, Muzwidzwa R, Richter H, Hakkarainen KM (2023)
An observational post-authorization safety study (PASS) of naloxegol drug utilization in four European countries
Pharmacoepidemiol Drug Saf, 33 (1), e5710
DOI 10.1002/pds.5710, PubMed 37969030

Publications 2022

Sørensen K, Skirbekk H, Kvarstein G, Wøien H (2022)
Home administration of needle injections for children with rheumatic diseases: A qualitative study on nurses' perception of their educational role
J Pediatr Nurs, 66, e137-e144
DOI 10.1016/j.pedn.2022.04.011, PubMed 35491289

Publications 2021

Roland SB, Pripp AH, Msomphora MR, Kvarstein G (2021)
The efficacy of botulinum toxin A treatment for tension-type or cervicogenic headache: a systematic review and meta-analysis of randomized, placebo-controlled trials
Scand J Pain, 21 (4), 635-652
DOI 10.1515/sjpain-2021-0038, PubMed 34090319

Sørensen K, Skirbekk H, Kvarstein G, Wøien H (2021)
I don't want to think about it: a qualitative study of children (6-18 years) with rheumatic diseases and parents' experiences with regular needle injections at home
Pediatr Rheumatol Online J, 19 (1), 8
DOI 10.1186/s12969-021-00495-4, PubMed 33482852

Publications 2020

Andersen KK, Kvarstein G (2020)
Postoperative opioids and risk of respiratory depression - A cross-sectional evaluation of routines for administration and monitoring in a tertiary hospital
Scand J Pain, 21 (1), 203-207
DOI 10.1515/sjpain-2020-0060, PubMed 33108339

Danielsson L, Kvarstein G, Bergvik S (2020)
Mediators of Pain and Physical Function in Female and Male Patients with Chronic Pain
J Pain Res, 13, 1059-1071
DOI 10.2147/JPR.S233501, PubMed 32547171

Hausken J, Fretland ÅA, Edwin B, Kvarstein G, Tønnessen TI (2020)
Response to the Comment on "Epidural Analgesia (TEA) vs. IV-PCA After Open Liver Surgery"
Ann Surg, 271 (5), e126-e127
DOI 10.1097/SLA.0000000000003684, PubMed 31800498

Måwe L, Thorén LM, Kvarstein G (2020)
Responses after spinal interventions in a clinical pain practice - a pragmatic observational study
Scand J Pain, 20 (3), 469-482
DOI 10.1515/sjpain-2019-0126, PubMed 31977310

Stedenfeldt M, Kvarstein G, Nilsen TIL, Schjødt B, Borchgrevink PC, Halsteinli V (2020)
Pre-consultation biopsychosocial data from patients admitted for management at pain centers in Norway
Scand J Pain, 20 (2), 363-373
DOI 10.1515/sjpain-2019-0076, PubMed 31940290

Sørensen K, Skirbekk H, Kvarstein G, Wøien H (2020)
Children's fear of needle injections: a qualitative study of training sessions for children with rheumatic diseases before home administration
Pediatr Rheumatol Online J, 18 (1), 13
DOI 10.1186/s12969-020-0406-6, PubMed 32033566

Publications 2019

Hausken J, Fretland ÅA, Edwin B, Andersen MH, Dagenborg VJ, Bjørnelv GMW, Kristiansen R, Røysland K, Kvarstein G, Tønnessen TI (2019)
Intravenous Patient-controlled Analgesia Versus Thoracic Epidural Analgesia After Open Liver Surgery: A Prospective, Randomized, Controlled, Noninferiority Trial
Ann Surg, 270 (2), 193-199
DOI 10.1097/SLA.0000000000003209, PubMed 30676382

Kvarstein G, Högström H, Allen SM, Rosland JH (2019)
Cryoneurolysis for cervicogenic headache - a double blinded randomized controlled study
Scand J Pain, 20 (1), 39-50
DOI 10.1515/sjpain-2019-0086, PubMed 31675351

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

Nothnagel H, Brown Menard M, Kvarstein G, Norheim AJ, Weiss T, Puta C, Mist SD, Musial F (2019)
Recruitment and inclusion procedures as "pain killers" in clinical trials?
J Pain Res, 12, 2027-2037
DOI 10.2147/JPR.S204259, PubMed 31308731

Stedenfeldt M, Kvarstein G, Schjodt B, Johansen A, Berntsen AGS, Brautaset A, Halsteinli V (2019)
Rights assessment and quality of referrals- rate of agreement between four pain management centres
Tidsskr. Nor. Laegeforen., 139 (9), 817-822

Stedenfeldt M, Kvarstein G, Schjødt B, Johansen A, Berntsen AGS, Brautaset A, Halsteinli V (2019)
Rights assessment and quality of referrals - rate of agreement between four pain management centres
Tidsskr Nor Laegeforen, 139 (9)
DOI 10.4045/tidsskr.18.0396, PubMed 31140252

Publications 2018

Damsgård E, Solgård H, Johannessen K, Wennevold K, Kvarstein G, Pettersen G, Garcia B (2018)
Understanding Pain and Pain Management in Elderly Nursing Home Patients Applying an Interprofessional Learning Activity in Health Care Students: A Norwegian Pilot Study
Pain Manag Nurs, 19 (5), 516-524
DOI 10.1016/j.pmn.2018.02.064, PubMed 29779794

Hansson P, Jensen TS, Kvarstein G, Strömberg M (2018)
Pain-relieving effectiveness, quality of life and tolerability of repeated capsaicin 8% patch treatment of peripheral neuropathic pain in Scandinavian clinical practice
Eur J Pain, 22 (5), 941-950
DOI 10.1002/ejp.1180, PubMed 29388284

Kvarstein G, Lundeland B (2018)
Bipolar radiofrequency neurotomy for spinal pain - a promising technique but still some steps to go
Scand J Pain, 18 (4), 565-566
DOI 10.1515/sjpain-2018-0305, PubMed 30281515

Publications 2017

Lundeland B, Janerås L, Kvarstein G (2017)
Severe side effects from intrathecal morphine for chronic pain after repeated failed spinal operations
Scand J Pain, 17, 150-151
DOI 10.1016/j.sjpain.2017.09.003, PubMed 28950244

Publications 2016

Lundeland B, Kvarstein G (2016)
Is there a place for pulsed radiofrequency in the treatment of chronic pain?
Scand J Pain, 12, 55-56
DOI 10.1016/j.sjpain.2016.04.002, PubMed 28850492

Publications 2015

Kvarstein G (2015)
Frozen shoulder and corticosteroids--still a need for needles?
Pain, 156 (9), 1587-1588
DOI 10.1097/j.pain.0000000000000225, PubMed 26075964

Winger A, Kvarstein G, Wyller VB, Ekstedt M, Sulheim D, Fagermoen E, Småstuen MC, Helseth S (2015)
Health related quality of life in adolescents with chronic fatigue syndrome: a cross-sectional study
Health Qual Life Outcomes, 13, 96
DOI 10.1186/s12955-015-0288-3, PubMed 26138694

Publications 2014

Winger A, Kvarstein G, Wyller VB, Sulheim D, Fagermoen E, Småstuen MC, Helseth S (2014)
Pain and pressure pain thresholds in adolescents with chronic fatigue syndrome and healthy controls: a cross-sectional study
BMJ Open, 4 (9), e005920
DOI 10.1136/bmjopen-2014-005920, PubMed 25287104

Publications 2012

Kvarstein G (2012)
Pulsed radiofrequency-Time for a clinical pause and more science
Scand J Pain, 3 (3), 124-126
DOI 10.1016/j.sjpain.2012.05.071, PubMed 29913819

Rognstad MK, Fredheim OM, Johannessen TE, Kvarstein G, Skauge M, Undall E, Rustøen T (2012)
Attitudes, beliefs and self-reported competence about postoperative pain among physicians and nurses working on surgical wards
Scand J Caring Sci, 26 (3), 545-52
DOI 10.1111/j.1471-6712.2011.00964.x, PubMed 22272649

Publications 2011

Fredheim OM, Borchgrevink PC, Kvarstein G (2011)
[Post-operative pain management in hospitals]
Tidsskr Nor Laegeforen, 131 (18), 1772-6
DOI 10.4045/tidsskr.10.1184, PubMed 21946595

Fredheim OM, Kvarstein G, Undall E, Stubhaug A, Rustøen T, Borchgrevink PC (2011)
[Postoperative pain in patients admitted to Norwegian hospitals]
Tidsskr Nor Laegeforen, 131 (18), 1763-7
DOI 10.4045/tidsskr.10.1129, PubMed 21946593

Kvarstein G (2011)
Choi WJ et al. "Radiofrequency treatment relieves chronic knee osteoarthritis pain: a double-blind randomized controlled trial" [Pain 2011;152:481-7]
Pain, 152 (8), 1934-1936
DOI 10.1016/j.pain.2011.05.030

Waelgaard L, Dahl BM, Kvarstein G, Tønnessen TI (2011)
Tissue gas tensions and tissue metabolites for detection of organ hypoperfusion and ischemia
Acta Anaesthesiol Scand, 56 (2), 200-9
DOI 10.1111/j.1399-6576.2011.02572.x, PubMed 22103593

Publications 2010

Kvarstein G (2010)
A new target for radiofrequency neurotomy?
Pain, 152 (3), 465-466
DOI 10.1016/j.pain.2010.09.037, PubMed 20961686

Kvarstein G (2010)
Nerve block-A reliable diagnostic tool?
Scand J Pain, 1 (4), 184-185
DOI 10.1016/j.sjpain.2010.08.006, PubMed 29913987

Kvarstein G, Jørum E (2010)
[The intern's vein--the patient's nightmare?]
Tidsskr Nor Laegeforen, 130 (12), 1250-1
DOI 10.4045/tidsskr.09.0769, PubMed 20567278

Publications 2009

Kvarstein G, Måwe L, Indahl A, Hol PK, Tennøe B, Digernes R, Stubhaug A, Tønnessen TI, Beivik H (2009)
A randomized double-blind controlled trial of intra-annular radiofrequency thermal disc therapy--a 12-month follow-up
Pain, 145 (3), 279-286
DOI 10.1016/j.pain.2009.05.001, PubMed 19647940

Kvarstein G, Måwe L, Indahl A, Hol PK, Tennøe B, Digernes R, Tønnessen TI, Beivik H, Stubhaug A (2009)
Placebo control--still the most ethical study design
Pain, 148 (1), 174-175
DOI 10.1016/j.pain.2009.11.013, PubMed 19962241

Publications 2008

Breivik H, Borchgrevink PC, Allen SM, Rosseland LA, Romundstad L, Hals EK, Kvarstein G, Stubhaug A (2008)
Assessment of pain
Br J Anaesth, 101 (1), 17-24
DOI 10.1093/bja/aen103, PubMed 18487245

Svendsrud A, Kvarstein G (2008)
Smerte og intensivpasienten
In Ulike tekster om smerte: fra nocisepsjon til livskvalitet, Gyldendal akademisk, Oslo, s. 290-306
BIBSYS 082789541

Publications 2007

Andersen MH, Mathisen L, Veenstra M, Oyen O, Edwin B, Digernes R, Kvarstein G, Tønnessen TI, Wahl AK, Hanestad BR, Fosse E (2007)
Quality of life after randomization to laparoscopic versus open living donor nephrectomy: long-term follow-up
Transplantation, 84 (1), 64-9
DOI 10.1097/01.tp.0000268071.63977.42, PubMed 17627239

Publications 2006

Andersen MH, Mathisen L, Oyen O, Edwin B, Digernes R, Kvarstein G, Tønnessen TI, Wahl AK, Hanestad BR, Fosse E (2006)
Postoperative pain and convalescence in living kidney donors-laparoscopic versus open donor nephrectomy: a randomized study
Am J Transplant, 6 (6), 1438-43
DOI 10.1111/j.1600-6143.2006.01301.x, PubMed 16686768

Jørum E, Ørstavik K, Schmidt R, Namer B, Carr RW, Kvarstein G, Hilliges M, Handwerker H, Torebjörk E, Schmelz M (2006)
Catecholamine-induced excitation of nociceptors in sympathetically maintained pain
Pain, 127 (3), 296-301
DOI 10.1016/j.pain.2006.08.022, PubMed 16997471

Publications 2005

Breivik H, Kvarstein G (2005)
[Pain as a health problem]
Tidsskr Nor Laegeforen, 125 (20), 2807
PubMed 16244687

Nortvedt P, Kvarstein G, Jønland I (2005)
Sedation of patients in intensive care medicine and nursing: ethical issues
Nurs Ethics, 12 (5), 522-36
DOI 10.1191/0969733005ne819oa, PubMed 16178347

Øyen O, Andersen M, Mathisen L, Kvarstein G, Edwin B, Line PD, Scholz T, Pfeffer PF (2005)
Laparoscopic versus open living-donor nephrectomy: experiences from a prospective, randomized, single-center study focusing on donor safety
Transplantation, 79 (9), 1236-40
DOI 10.1097/01.tp.0000161669.49416.ba, PubMed 15880077

Publications 2004

Kvarstein G (2004)
Tissue PCO₂ for early detection of organ ischemia
In Series of dissertations submitted to the Faculty of Medicine, University of Oslo, Unipub, Oslo, no. 225, 1 b. (flere pag.)
BIBSYS 042290740, ISBN 82-8072-136-3

Kvarstein G, Mirtaheri P, Tønnessen TI (2004)
Detection of ischemia by PCO2 before adenosine triphosphate declines in skeletal muscle
Crit Care Med, 32 (1), 232-7
DOI 10.1097/01.CCM.0000104948.41544.FC, PubMed 14707584

Publications 2003

Kvarstein G, Barstad M, Mirtaheri P, Tønnessen TI (2003)
Tissue carbon dioxide tension: a putative specific indicator of ischemia in porcine latissimus dorsi flaps
Plast Reconstr Surg, 112 (7), 1825-31
DOI 10.1097/01.PRS.0000091166.83956.39, PubMed 14663226

Kvarstein G, Mirtaheri P, Tønnessen TI (2003)
Detection of organ ischemia during hemorrhagic shock
Acta Anaesthesiol Scand, 47 (6), 675-86
DOI 10.1034/j.1399-6576.2003.00134.x, PubMed 12803584

Publications 2002

Rasmussen H, Mirtaheri P, Dirven H, Johnsen H, Kvarstein G, Tønnessen TI, Midtvedt T (2002)
PCO(2) in the large intestine of mice, rats, guinea pigs, and dogs and effects of the dietary substrate
J Appl Physiol (1985), 92 (1), 219-24
DOI 10.1152/japplphysiol.00190.2001, PubMed 11744663

Publications 2001

Kvarstein G, Tønnessen TI (2001)
[Pain--difficult for both laymen and professionals]
Tidsskr Nor Laegeforen, 121 (22), 2577
PubMed 11668750

Publications 2000

Hol PK, Kvarstein G, Viken O, Smedby O, Tonnessen TI (2000)
MRI-guided celiac plexus block
J. Magn. Reson. Imaging, 12 (2), 562-564
DOI 10.1002/1522-2586(200010)12:4<562::AID-JMRI7>3.0.CO;2-A

Hol PK, Kvarstein G, Viken O, Smedby O, Tønnessen TI (2000)
MRI-guided celiac plexus block
J Magn Reson Imaging, 12 (4), 562-4
DOI 10.1002/1522-2586(200010)12:4<562::aid-jmri7>3.0.co;2-a, PubMed 11042637

Publications 1999

Rasmussen H, Kvarstein G, Johnsen H, Dirven H, Midtvedt T, Mirtaheri P, Tønnessen TI (1999)
Gas supersaturation in the cecal wall of mice due to bacterial CO2 production
J Appl Physiol (1985), 86 (4), 1311-8
DOI 10.1152/jappl.1999.86.4.1311, PubMed 10194217

Publications 1997

Kvarstein G, Tønnessen TI (1997)
[CO2 pressure used in the diagnosis of ischemia]
Tidsskr Nor Laegeforen, 117 (29), 4251-5
PubMed 9441471

Publications 1996

Tønnessen TI, Kvarstein G (1996)
PCO2 electrodes at the surface of the kidney detect ischaemia
Acta Anaesthesiol Scand, 40 (5), 510-9
DOI 10.1111/j.1399-6576.1996.tb04481.x, PubMed 8792878

Publications 1989

Gulbrandsen P, Fugelli P, Kvarstein G, Moland L (1989)
The duration of acute respiratory tract infections in children
Scand J Prim Health Care, 7 (4), 219-23
DOI 10.3109/02813438909088668, PubMed 2626611

Publications 1988

Kvarstein G, Hovdenak N (1988)
[Granulocytopenia in treatment with salazopyrin]
Tidsskr Nor Laegeforen, 108 (32), 2982-3
PubMed 2908084