Cardiac SurgeryNCT07385170
Perioperative Continuous Glucose Monitoring Accuracy in Cardiac Surgery
An observational study of Cardiac Surgery, run by Seoul National University Hospital at 1 site in South Korea.
Trial summary
The goal of this clinical trial is to evaluate accuracy of continuous glucose monitoring device called 'Dexcom G7' in patients undergoing cardiac surgery. Read more about this study
- Who is it for?
- Ages 19 years and older
- Conditions the study is for
- Cardiac Surgery
- What is being tested?
- Dexcom G7
- Type of treatment
- Medical device
- How many people
- 100 participants
- Where
- 1 siteSouth Korea
- Study dates
- 27 May 2026to 31 May 2028
- Phase
- Observational
- Are there results?
- Not yet: the study is under way
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 19 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Study population: Patients who scheduled for cardiac surgery in Seoul National University Hospital
Who may be able to join
- Patients aged 19 years or older scheduled for cardiac surgery
Who cannot join
- Skin disease at the sensor application site (proximal arm)
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
South Korea1 site, 1 recruiting
- Recruiting
Seoul National University Hospital
Seoul, 03080
Karam Nam, +82 2 2072 0643, karamnam@gmail.com
About this study
Official title: Evaluation of Perioperative Continuous Glucose Monitoring Accuracy in Patients Undergoing Cardiac Surgery
The goal of this clinical trial is to evaluate accuracy of continuous glucose monitoring device called 'Dexcom G7' in patients undergoing cardiac surgery.
- Conditions
- Cardiac Surgery
- Being tested
- Dexcom G7
- Keywords
- continuous glucose monitoring
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Dexcom G7Device
Continuous glucose monitoring device (Dexcom G7) will be applied to patients undergoing cardiac surgery intraoperatively and postoperatively (maximum 10 days)
| Study group | Role | What they receive |
|---|---|---|
| CGM cohort | Application of perioperative continuous glucose monitoring Receives: Device: Dexcom G7 |
What is being measured
The primary outcome is the main question the study is designed to answer.
MARD
mean absolute relative difference
Measured: From the beginning of operation to the end of postoperative ICU stay (maximum 10 days)
Secondary outcomes (3)
Bland-Altman analysis
mean difference, bias, 95% limits of agreement
Measured: From the beginning of operation to the end of postoperative ICU stay (maximum 10 days)
ISO criteria
Satisfaction of 2013 ISO (International Organization of Standardization) criteria
Measured: From the beginning of operation to the end of postoperative ICU stay (maximum 10 days)
DTS error grid
DTS (Diabtetes Technology Society) error grid
Measured: From the beginning of operation to the end of postoperative ICU stay (maximum 10 days)
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted3 Feb 2026
- Study start27 May 2026
- Primary completion31 May 2028 (estimated)
- Study completion31 May 2028 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Cardiac SurgeryStudies of the same condition, open and under way.
- More trials run by Seoul National University HospitalThe 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
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 100 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Seoul National University Hospital
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Karam Nam, MD, Seoul National University Hospital
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07385170
- Sponsor's protocol ID
- CGM-CS
- Status last verified
- Jun 2026
- First submitted
- 27 Jan 2026
- Last updated
- 26 Jun 2026
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- Yes
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 26 Jun 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Evaluation of Perioperative Continuous Glucose Monitoring Accuracy in Patients Undergoing Cardiac Surgery
- ClinicalTrials.gov ID
- NCT07385170
- Acronym / sponsor ID
- CGM-CS
- Conditions
- Cardiac Surgery
- Keywords
- continuous glucose monitoring
- Study type
- Observational
- Recruitment status
- Recruiting
- Enrolment
- 100 participants (estimated)
- Lead sponsor
- Seoul National University HospitalUniversity, hospital or other
- Study start
- 27 May 2026 (actual)
- Primary completion
- 31 May 2028 (estimated)
- Study completion
- 31 May 2028 (estimated)
- First posted
- 3 Feb 2026 (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.
The goal of this clinical trial is to evaluate accuracy of continuous glucose monitoring device called 'Dexcom G7' in patients undergoing cardiac surgery.
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| CGM cohort | – | Device: Dexcom G7Application of perioperative continuous glucose monitoring |
Who may qualify
- Ages
- 19 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- Patients who scheduled for cardiac surgery in Seoul National University Hospital
Key inclusion criteria (1 listed)
- Patients aged 19 years or older scheduled for cardiac surgery
Key exclusion criteria (1 listed)
- Skin disease at the sensor application site (proximal arm)
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 |
|---|---|---|
| Dexcom G7Continuous glucose monitoring device (Dexcom G7) will be applied to patients undergoing cardiac surgery intraoperatively and postoperatively (maximum 10 days) | Device | CGM cohort |
Primary outcome
MARD
Time frame: From the beginning of operation to the end of postoperative ICU stay (maximum 10 days)
mean absolute relative difference
3 secondary outcomes
Bland-Altman analysis
Time frame: From the beginning of operation to the end of postoperative ICU stay (maximum 10 days)
ISO criteria
Time frame: From the beginning of operation to the end of postoperative ICU stay (maximum 10 days)
DTS error grid
Time frame: From the beginning of operation to the end of postoperative ICU stay (maximum 10 days)
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 26 Jun 2026.
- Individual participant dataSharing planned: No
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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.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Cardiac Surgery, run by Seoul National University Hospital at 1 site in South Korea.
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 1 inclusion and 1 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: looking for participants now, as of the sponsor's last update on 26 Jun 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 South Korea. 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?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Karam Nam, M.D., Ph.D. (+82 2 2072 0643, karamnam@gmail.com), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
MARD (time frame: From the beginning of operation to the end of postoperative ICU stay (maximum 10 days)). 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 Jun 2026.