Dr. Ronald Liem

Bariatric Surgery

MD, PhD, Metabolic/Bariatric Surgeon and Trauma Surgeon, Groene Hart Hospital; Director, De Nederlandse Obesitas Kliniek, Netherlands

Netherlands

Biography Publications Featured in

Biography

Metabolic and trauma surgeon with a lot of management experience and organizational skills, at local, national and international level. I am driven by (clinical) outcome, data and innovation. Improving the outcomes of care, care processes and care management are essential parts of my practice. Where possible I share it with others.

Publications

Selected publications from PubMed

Definition and Diagnostic Criteria of Clinical Obesity-Implications for Metabolic Bariatric Surgical Practice.

Brouwer AJ, Vugts G, Liem RSL, Nienhuijs SW

Clin Obes. 2026 Oct;16(5):e70107 doi: 10.1111/cob.70107.

Excess daytime sleepiness, daily functioning and health-related quality of life during the first year after metabolic and bariatric surgery in patients with a known and unknown obstructive sleep apnea status.

Berends C, Heusschen L, van Veldhuisen SL, de Castro SMM, van Veen RN, Wiezer MJ, Liem RSL, van Dielen FMH, Demirkiran A, Boerma EG, Fabius TM, Hazebroek EJ

Sleep Breath. 2026 Jun 15;30(4) doi: 10.1007/s11325-026-03729-5.

Optimising the Delphi survey method during core set development: The impact of summarised feedback on stakeholders' prioritisation of core data items and consensus.

Chalmers KA, Coulman K, Blazeby JM, Dixon J, Kow L, Liem R, Pournaras DJ, Ottosson J, Welbourn R, Brown W, Avery KNL

PLoS One. 2026;21(6):e0348136 doi: 10.1371/journal.pone.0348136.

Sex disparities in patients undergoing metabolic bariatric surgery: Data from a national registry.

van der Meer R, Monpellier VM, Liem RSL, Janssen IMC, Hazebroek EJ, Serlie MJ

Clin Nutr. 2026 Apr;59:106609 doi: 10.1016/j.clnu.2026.106609.

Impact of Metabolic Bariatric Surgery on Weight Loss and Glycemic Control in Adults With Type 1 Diabetes: A Multicenter Retrospective Cohort Study.

van der Meer R, Pazmino S, Steenackers N, van Laar A, Sluis M, Tolenaars L, Rosen J, Hurtado Del Pozo C, le Roux CW, Al Kandari J, Irshad M, Lannoo M, Deleus E, Dillemans B, Van Nieuwenhove Y, van Bon A, Hazebroek E, Al Ozairi E, Hoogma R, Mathieu C, Liem R, Van der Schueren B

Diabetes Care. 2026 Apr 1;49(4):658-663 doi: 10.2337/dc25-2295.

Featured in

36 min

How do I Implement and Standardize ERAS Techniques in my hospital?

ERAS protocols have well established advantages in several disciplines—primarily in colorectal, breast and hepatobiliary surgery—with reduced perioperative stress, less organ dysfunction, and shortened post-operative recovery time. ERAS protocols have also been safely implemented in bariatric patients to improve patient outcomes, reduce length of stay, and have fewer postoperative complications. Several of the individual ERAS components have been introduced in the setting of bariatric surgery, but reports are scarce. We review the articles by Dutton et al, which showed an average length of stay after bariatric surgery and ERAS between 1.08 and 3.64 days. Complication rates were also reported. There remains a substantial need for randomized controlled trials. Further research is also needed into a more comprehensive series of outcomes, pain control, and cost.

Published

Jun 2021

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