An observational study in Anesthesia, Analgesia and Bariatric Surgery, sponsored by Insel Gruppe AG, University Hospital Bern. Recruiting at 1 site in Switzerland. Open to participants aged 18 Years and older, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-01-07.
Sponsored by Insel Gruppe AG, University Hospital Bern · Observational
Among 56 studies in Pain, Postoperative with a site in Switzerland — 12 open to participants now, 12 under way, none of them phase 3. Pain, Postoperative · Switzerland.
Among the 56 studies in Pain, Postoperative with a site in Switzerland, this one is one of 3 that started in 2011, is one of 9 observational ones, reaches primary completion later than 3 of the 11 other live ones, and was the 21st registered.
5,640 studies on the registry are indexed under Pain, Postoperative; 1,230 are open to participants now.
This study's planned enrollment of 2,000 is above the median of 102 across 683 observational studies indexed under Pain, Postoperative.
Browse Pain, Postoperative studies →12 of the 56 studies in Pain, Postoperative with a site in Switzerland are open now, in 1 country. Each count lists the studies.
Of the 679 Pain, Postoperative studies recruiting now, 241 (35%) set no upper age limit and 328 (48%) stop at 75 or younger; 74 take children under 18; 128 take healthy volunteers.
This study: 18 Years and older · all sexes · healthy volunteers too.
The full table on the hub →56 studies; the count open now beside each. This study's row is marked.
First in 2004; this study’s year is marked. 3 started in 2011.
Median enrollment 100 across the 47 interventional studies, 355 across the 9 observational. Of the 42 that completed or were terminated, 4 (10%) have results posted.
3 of 56 have an industry lead sponsor. The 10 most frequent:
Insel Gruppe AG, University Hospital Bern is the lead sponsor of 741 studies on the registry; 180 are open to participants now.
Insel Gruppe AG, University Hospital Bern has 4 studies filed under Pain, Postoperative — fewer than ten, so there is no comparison to draw.
9 of the studies in Pain, Postoperative with a site in Switzerland that are under way reach primary completion within a year, 0 of them phase 3. Phase 3 first, then by date:
| Study | Primary completion |
|---|---|
| NCT03490630Insel Gruppe AG, University Hospital BernPatient Reported Outcome After Bariatric Surgery | 2026-12 |
| NCT03489499Insel Gruppe AG, University Hospital BernGenetic Variants and Postoperative Pain | 2026-12 |
| NCT06107595Centre de Médecine Intégrative et Complémentaire (CEMIC)Conditioned Open Label Placebo for Postoperative Pain Management | 2026-12-31 |
| NCT05816174Helen KoechlinLongitudinal Study of Chronic Postsurgical Pain in Children and Adolescents | 2027-01 |
| NCT06317870Centre Hospitalier Universitaire VaudoisPericapsular Nerve Block Versus Intrathecal Morphine for Analgesia After Primary Hip Arthroplasty | 2027-01-01 |
Among the 56 studies in Pain, Postoperative with a site in Switzerland, from their registry updates:
Prospective association study to analyse patients' outcome after bariatric surgery.
Outcome comprises postoperative pain, analgesia, postoperative side-effects, long-lasting pain, patients' impairment in daily living.
Background
Bariatric surgery is a common procedure. Data on patient related outcome beyond loss of body weight are scarce. The question arises which patient is at specific risk for an unfavorable outcome after bariatric surgery.
Objective
The aim of this study is to investigate variables possibly associated with impaired outcome and increased patients' interference after bariatric surgery. Which patients are at risk for clinically meaningful impaired daily living?
Methods
Patients will be enrolled in a prospective observational study. Data will be collected in a registry with documentation of patient, surgery, anesthesia and analgesia related variables including preoperative status and postoperative patient reported outcome with a follow-up period up to 5 years after bariatric surgery.
Patients fill in standardized validated outcome questionnaires at predefined time points. The registry provides the basis for large scale analyses and benchmarks for several parameters.
Variables to be considered are pain scores after surgery, patient reported outcome, pain related interference after surgery (Brief Pain Inventory), quality of life (SF-12), long-term outcome, chronic (neuropathic) postsurgical pain, BMI, psychological questionnaires, surgery and patient related variables, including genetic variants.
Patients scheduled for elective bariatric surgery
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Patients undergoing elective surgery with anesthesia
What influences pain related impairment after bariatric surgery
Measured by the validated International Pain Outcomes Questionnaire: Patient reported outcome using the numeric rating scale 0-10 (0=no impairment, 10=worst experience possible). Patients with severe pan (pain scores of NRS 6 and higher) are compared to those with no and mild pain.
Time frame: First day after surgery
Change in pain related outcome after bariatric surgery
Measurement of patient reported outcome by the BPI (Brief Pain Inventory). The BPI gives information on the physical and affective interference as well as pain scores using the numeric rating scale (NRS: 0-10). Cut-offs discussed for the three groups no/mild interference, moderate interference and severe interference are mean NRS-scores of 3 and 5.
Time frame: Up to 12 months after surgery
Change in interference with daily activities after bariatric surgery
Physical and affective interference as well as pain scores measured by the Brief Pain Inventory (BPI). Independent variables e.g. Hospital Anxiety and Depression Scale (HADS) and further validated psychological questionnaires
Time frame: Up to to 5 years after surgery
Change in quality of life after bariatric surgery
Measured by the 12 item short-form health survey (SF-12).
Time frame: Up to 5 years after surgery
Started Jan 2011 (actual). Primary completion is estimated for Dec 2026, 191 months after the start.
Of 391 non-industry observational studies under Pain, Postoperative, half reached primary completion within 13 months of starting (the median), counting those still running; a quarter within 5 and three quarters within 32. This study's planned 191 months is above that.
Counting every sponsor, half of 395 studies reached it within 13 months; a quarter within 5 and three quarters within 33.
How these figures are worked out, and which studies are left out of them.
Eligibility is decided by the study team. Share this record with your doctor or contact the team directly.
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Insel Gruppe AG, University Hospital Bern →