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Morbid Obesity and Severe Knee Osteoarthritis - Which Should Be Treated First?

Morbid Obesity and Severe Knee Osteoarthritis - Which Should Be Treated First? A Randomized Cross-over Study

Status
Not yet recruiting
Phases
NA
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06767787
Enrollment
142
Registered
2025-01-10
Start date
2025-02-28
Completion date
2027-01-31
Last updated
2025-01-30

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Arthroplasties, Knee Replacement, Osteoarthritis of Knee, Sleeve Gastrectomy

Keywords

knee osteoarthritis, bariatric surgery, laparoscopic sleeve gastrectomy, knee replacement, knee arthroplasty, obesity

Brief summary

The goal of this study is to determine whether undergoing bariatric surgery before knee replacement leads to better outcomes compared to undergoing knee replacement before bariatric surgery. Our secondary goal is to compare complication rates between these groups to determine if there is a difference based on the order of the two procedures. Participants will be randomly placed in one of two groups, with each undergoing both procedures but in opposite order. Quality of life will be assessed via questionnaires before and between each procedure, and rates of complications will also be documented to compare their rates between groups.

Interventions

PROCEDURElaparoscopic sleeve gastrectomy

Participants undergoing laparoscopic sleeve gastrectomy (LSG) will be clinically assessed and provided consent to this procedure by one of the bariatric surgeons affiliated with the bariatric surgery program. LSG will be performed at a local tertiary care hospital as either a day procedure or as an overnight stay if medically indicated. Patients will be discharged once they can tolerate a liquid diet. Patients will then attend regular follow-ups with their surgeons and the bariatric surgery program, in accordance with a standardized clinical pathway protocol.

PROCEDUREtotal knee arthroplasty

Patients undergoing unilateral total knee arthroplasty (TKA) will be clinically assessed and provided consent to their procedure by an orthopaedic surgeon trained in joint arthroplasty. TKA will be performed at a local tertiary care hospital as either a day procedure or as an overnight stay if medically indicated. Patients will be discharged once physiotherapy clears them. Patients will attend regular follow-ups with their surgeon in accordance with a standardized clinical pathway protocol.

Sponsors

Memorial University of Newfoundland
Lead SponsorOTHER

Study design

Allocation
RANDOMIZED
Intervention model
CROSSOVER
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to 65 Years
Healthy volunteers
No

Inclusion criteria

* BMI \> or = 35, on surgical waitlist for a total knee arthroplasty and laparoscopic sleeve gastrectomy

Exclusion criteria

* a history of revision surgery, surgery for neoplastic disease, significant mental illness, ASA class \> 3 denoting absence of significant impact of comorbidities, and previous esophagogastric surgery.

Design outcomes

Primary

MeasureTime frameDescription
SF-36 Physical Function Component ScoreAt baseline/enrollment followed by a year following each procedure.The 36-Item Short-Form Survey (SF-36) Physical Function Component Score will be assessed 1 year after each procedure as a measure of quality of life.

Secondary

MeasureTime frameDescription
SF-36 Mental Component ScoreAt baseline/enrolment followed by a year after each procedureThe 36-Item Short Form Survey's (SF-36) Mental Component Score will be used to assess participants' quality of life at baseline in addition to after each procedure.
Knee Osteoarthritis Outcome Score (KOOS)At baseline/enrolment in addition to a year following each procedureThe KOOS will be used to assess knee-specific function and symptoms at baseline as well as after each procedure.
Post-Operative OutcomesAt 12 and 24 months following each interventionPost-operative outcomes following each intervention will be collected, including: hospital bed-day utilization, change in BMI and weight at 12 and 24 months.
Post-Operative ComplicationsSurveilled every 3 months post- each procedure, until the 12-month postoperative mark.Post-operative complications will be surveilled every 3 months following each procedure, including: death from any cause, perioperative or postoperative complications that result in a delay in discharge (e.g., fracture, neurapraxia, sepsis, nosocomial infection, myocardial infarction, bowel obstruction, postoperative nausea & vomiting, venous thromboembolism, cerebrovascular event, and renal failure), wound complications (e.g., infections, hematomas, and dehiscence), prosthetic infection, and unplanned procedures and/or readmission.

Countries

Canada

Contacts

Primary ContactDaniel G Muller, MD
dmuller@mun.ca647-227-1629
Backup ContactJack A Kerr, MD
jamkerr@mun.ca506-608-5005

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026