Weight LossNCT03221543
Resting Metabolic Rate Testing in Bariatric Surgery Patients
A study testing ReeVue Indirect Calorimeter in people with Weight Loss and Bariatric Surgery Candidate, run by Baylor Research Institute at 1 site in United States.
Trial summary
This study evaluates if measuring resting metabolic rate (the number of calories the body burns at rest) before surgery can help predict successful weight loss after surgery. Read more about this study
- Who is it for?
- Ages 18 years and olderHealthy volunteers can take part
- Conditions the study is for
- Weight Loss, Bariatric Surgery Candidate
- What is being tested?
- ReeVue Indirect Calorimeter
- Type of treatment
- Medical device
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 84 participants
- Where
- 1 siteUnited States
- Study dates
- 31 Jul 2017to 25 Dec 2023
- Phase
- Interventional
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- Healthy volunteers accepted
- Adult, Older adult
Who may be able to join
- All patients scheduled for a primary bariatric surgery
- 18 years of age to no upper limit
Who cannot join
None listed.
Trial locations and contacts
1 site in 1 country.
United States1 site
Baylor Weight Loss Surgery Center
Dallas, Texas, 75231
About this study
Official title: The Role of Pre-Surgical Metabolic Testing for Procedure Selection in Bariatric Surgery
This study evaluates if measuring resting metabolic rate (the number of calories the body burns at rest) before surgery can help predict successful weight loss after surgery.
Read the detailed description
This is a prospective study enrolling patients from the Baylor Weight Loss Surgery Center who have met all of the requirements to proceed with primary bariatric surgery. Patients will undergo pre-operative and post-operative metabolic testing (6 months, and 1 year after surgery) using a portable calorimeter with eventual follow up of medical record at 5 years. Data from up to 50 patients will be collected. The main objectives are to examine if the pre-operative resting metabolic rate can accurately predict successful weight loss after bariatric surgery and if it can be used to guide the selection of the type of bariatric surgery that would be most successful for the patient.
- Conditions
- Weight Loss, Bariatric Surgery Candidate
- Being tested
- ReeVue Indirect Calorimeter
- Medical subject headings
- Weight Loss
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
ReeVue Indirect CalorimeterDevice
The ReeVue Indirect Calorimeter will be used in this study to measure the resting metabolic rate. The test takes approximately ten minutes to complete. The subject should prepare for the test by avoiding stimulants and exercise on the day of the test, as well as eating meals four hours before the test. The subject will be seated during the test. They will be given a nose clip that looks like a clothes pin to be placed on their nose. A plastic mouth piece that allows all of the air they breathe to come in through the top of the mouth piece and the air they breathe out to go into the ReeVue Calorimeter will also be provided. The subject will remain in this position for ten minutes until the testing is complete.
| Study group | Role | What they receive |
|---|---|---|
| Resting Metabolic Rate Testing | Experimental | All subjects will have the resting metabolic rate test. The ReeVue Indirect Calorimeter from Korr Medical will be used to obtain the resting metabolic rate. Receives: Device: ReeVue Indirect Calorimeter |
What is being measured
The primary outcome is the main question the study is designed to answer.
Examine percent total weight loss
Weigh subjects using a scale
Measured: 1 year
Secondary outcomes (1)
Change in resting metabolic rate
Obtain resting metabolic rate using the Reevue Indirect Calorimeter
Measured: 1 year
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted18 Jul 2017
- Study start31 Jul 2017
- Primary completion25 Jun 2023
- Study completion25 Dec 2023
Why it stopped: In this study, there is 1 year of active subject participation and long-term follow-up data collected at year 5. Since study objectives were met with active subject data, the study team will not be collecting long-term data at year 5.
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Weight LossStudies of the same condition, open and under way.
- More trials run by Baylor Research InstituteThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 84 participants (actual)
Sponsor and investigators
- Lead sponsor
- Baylor Research Institute
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT03221543
- Sponsor's protocol ID
- IRB 017-125
- Status last verified
- Jan 2026
- First submitted
- 12 Jul 2017
- Last updated
- 26 Jan 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- Yes
Study at a glance
From the registry record, last updated by the sponsor on 26 Jan 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- The Role of Pre-Surgical Metabolic Testing for Procedure Selection in Bariatric Surgery
- ClinicalTrials.gov ID
- NCT03221543
- Acronym / sponsor ID
- IRB 017-125
- Conditions
- Weight Loss, Bariatric Surgery Candidate
- Study type
- Interventional
- Recruitment status
- TerminatedReason stopped: In this study, there is 1 year of active subject participation and long-term follow-up data collected at year 5. Since study objectives were met with active subject data, the study team will not be collecting long-term data at year 5.
- Enrolment
- 84 participants (actual)
- Lead sponsor
- Baylor Research InstituteUniversity, hospital or other
- Study start
- 31 Jul 2017 (actual)
- Primary completion
- 25 Jun 2023 (actual)
- Study completion
- 25 Dec 2023 (actual)
- First posted
- 18 Jul 2017 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This study evaluates if measuring resting metabolic rate (the number of calories the body burns at rest) before surgery can help predict successful weight loss after surgery.
Detailed description
This is a prospective study enrolling patients from the Baylor Weight Loss Surgery Center who have met all of the requirements to proceed with primary bariatric surgery. Patients will undergo pre-operative and post-operative metabolic testing (6 months, and 1 year after surgery) using a portable calorimeter with eventual follow up of medical record at 5 years. Data from up to 50 patients will be collected. The main objectives are to examine if the pre-operative resting metabolic rate can accurately predict successful weight loss after bariatric surgery and if it can be used to guide the selection of the type of bariatric surgery that would be most successful for the patient.
Study design
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Resting Metabolic Rate Testing | Experimental | Device: ReeVue Indirect CalorimeterAll subjects will have the resting metabolic rate test. The ReeVue Indirect Calorimeter from Korr Medical will be used to obtain the resting metabolic rate. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (2 listed)
- All patients scheduled for a primary bariatric surgery
- 18 years of age to no upper limit
Key exclusion criteria (0 listed)
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| ReeVue Indirect CalorimeterThe ReeVue Indirect Calorimeter will be used in this study to measure the resting metabolic rate. The test takes approximately ten minutes to complete. The subject should prepare for the test by avoiding stimulants and exercise on the day of the test, as well as eating meals four hours before the test. The subject will be seated during the test. They will be given a nose clip that looks like a clothes pin to be placed on their nose. A plastic mouth piece that allows all of the air they breathe to come in through the top of the mouth piece and the air they breathe out to go into the ReeVue Calorimeter will also be provided. The subject will remain in this position for ten minutes until the testing is complete. | Device | Resting Metabolic Rate Testing |
Primary outcome
Examine percent total weight loss
Time frame: 1 year
Weigh subjects using a scale
1 secondary outcome
Change in resting metabolic rate
Time frame: 1 year
Results and safety
The study was stopped early (reason given: In this study, there is 1 year of active subject participation and long-term follow-up data collected at year 5. Since study objectives were met with active subject data, the study team will not be collecting long-term data at year 5.). Results are not available in the source record.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 26 Jan 2026.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A study testing ReeVue Indirect Calorimeter in people with Weight Loss and Bariatric Surgery Candidate, run by Baylor Research Institute at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 0 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: stopped early, as of the sponsor's last update on 26 Jan 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study was stopped early (reason given: In this study, there is 1 year of active subject participation and long-term follow-up data collected at year 5. Since study objectives were met with active subject data, the study team will not be collecting long-term data at year 5.). Results are not available in the source record.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Examine percent total weight loss (time frame: 1 year). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 26 Jan 2026.