Ronald Marvik
Overview
Explore the profile of Ronald Marvik including associated specialties, affiliations and a list of published articles.
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Articles
46
Citations
446
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Recent Articles
1.
Bjerkan K, Sandvik J, Nymo S, Graeslie H, Johnsen G, Marvik R, et al.
Obes Surg
. 2023 Aug;
33(10):3178-3185.
PMID: 37635164
Purpose: Micronutrient deficiencies are common after Roux-en-Y gastric bypass (RYGB). This study explores whether vitamin and mineral deficiency was associated with adherence to recommended supplementation 12 years after RYGB. Materials...
2.
Belgau I, Johnsen G, Graeslie H, Marvik R, Nymo S, Bjerkan K, et al.
Surg Endosc
. 2022 Oct;
37(2):1349-1356.
PMID: 36203112
Background: Symptomatic cholelithiasis requiring treatment is a known side effect after Roux-en-Y gastric bypass (RYGB), but reported rates vary greatly. The objectives for this study were to evaluate the long-term...
3.
Bjerkan K, Sandvik J, Nymo S, Graeslie H, Johnsen G, Marvik R, et al.
Obes Surg
. 2022 Jul;
32(9):3005-3012.
PMID: 35790673
Purpose: Roux-en-Y gastric bypass (RYGB) is a well-documented treatment of severe obesity. Attending postoperative educational programs may improve the outcome. The aim of this study was to evaluate whether participation...
4.
Nymo S, Borresen Skjolsvold O, Aukan M, Finlayson G, Graeslie H, Marvik R, et al.
Obes Surg
. 2022 May;
32(7):2263-2271.
PMID: 35505168
Purpose: Suboptimal weight loss (SWL) and weight regain (WR) following bariatric surgery are common. The exact reasons for this phenomenon remain to be fully elucidated. To compare hedonic hunger, food...
5.
Sandvik J, Bjerkan K, Graeslie H, Hoff D, Johnsen G, Klockner C, et al.
Front Endocrinol (Lausanne)
. 2021 Oct;
12:679066.
PMID: 34630319
Iron deficiency with or without anemia is a well-known long-term complication after Roux-en-Y, gastric bypass (RYGB) as the procedure alters the gastrointestinal absorption of iron. Iron is essential for hemoglobin...
6.
Strommen M, Klockner C, Bjerkan K, Graeslie H, Hoff D, Johnsen G, et al.
Front Endocrinol (Lausanne)
. 2021 Jul;
12:679006.
PMID: 34226824
Objective: To explore patients' long-term experiences with drinking alcohol after Roux-n-Y gastric bypass (RYGB) for conceptualizing what may indicate problematic drinking behavior after bariatric surgery. Study Design: Three-center, observational study....
7.
Mansoor S, Vapenstad C, Marvik R, Glomsaker T, Bliksoen M
Minim Invasive Ther Allied Technol
. 2019 Jul;
29(5):261-268.
PMID: 31280633
To examine the construct validity of the low-cost, portable laparoscopic simulator eoSim using motion analysis. Novice and experienced surgeons (≤ 100 and >100 laparoscopic procedures performed, respectively) completed four tasks...
8.
Vapenstad C, Hofstad E, Eivind Bernstein T, Aadahl P, Johnsen G, Marvik R
Minim Invasive Ther Allied Technol
. 2019 May;
29(3):161-169.
PMID: 31066615
Box trainers with motion analysis are important add-ons to surgical training and skills assessment outside the operating room, given that they exhibit construct validity. Four different tasks were tested for...
9.
Perez de Frutos J, Hofstad E, Solberg O, Tangen G, Lindseth F, Lango T, et al.
Int J Comput Assist Radiol Surg
. 2018 Aug;
13(12):1927-1936.
PMID: 30074134
Purpose: Test the feasibility of the novel Single Landmark image-to-patient registration method for use in the operating room for future clinical trials. The algorithm is implemented in the open-source platform...
10.
Rethy A, Saeternes J, Halgunset J, Marvik R, Hofstad E, Sanchez-Margallo J, et al.
Int J Comput Assist Radiol Surg
. 2017 Sep;
13(1):61-72.
PMID: 28929364
Purpose: The objective of this study was to develop a multimodal, permanent liver phantom displaying functional vasculature and common pathologies, for teaching, training and equipment development in laparoscopic ultrasound and...