Accuracy of Dexcom G6® and FreeStyle Libre® Sensors in Standardized Hypoxemia Conditions

NCT ID: NCT05144802

Last Updated: 2025-04-09

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

30 participants

Study Classification

INTERVENTIONAL

Study Start Date

2022-05-16

Study Completion Date

2025-01-28

Brief Summary

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The major aim is to evaluate accuracy of 2 Continuous Glucose Monitoring Systems (CGMS) : Dexcom G6® and FreeStyle Libre® in standardized hypoxemia conditions (artificial normobaric hypoxia).

Our purpose is to demonstrate the good performance and calibration of these CGM sensors in hypoxemia conditions.

Detailed Description

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Conditions

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Type 1 Diabetes Mellitus Type 2 Diabetes Mellitus

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

NONE

Study Groups

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group 1 : FreeStyle Libre 2 on right arm and Dexcom G6 on left arm

In this group, participants will be continuously monitored for their interstitial glucose level with 2 CGM devices : FreeStyle Libre 2 will be applied on right arm and Dexcom G6 will be applied on left arm.

Group Type EXPERIMENTAL

acute hypoxia

Intervention Type PROCEDURE

Participants will be exposed to a 3-hour acute hypoxia

group 2 : 2 FreeStyle Libre 2 on left arm and Dexcom G6 on right arm

In this group, participants will be continuously monitored for their interstitial glucose level with 2 CGM devices : Dexcom G6 will be applied on right arm and FreeStyle Libre 2 will be applied on left arm.

Group Type ACTIVE_COMPARATOR

acute hypoxia

Intervention Type PROCEDURE

Participants will be exposed to a 3-hour acute hypoxia

Interventions

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acute hypoxia

Participants will be exposed to a 3-hour acute hypoxia

Intervention Type PROCEDURE

Eligibility Criteria

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Inclusion Criteria

* No history of respiratory diseases (childhood asthma, respiratory allergies, exercise-induced asthma or dyspnea)
* Willing to participate and able to sign an informed consent form (ICF)
* Being affiliated with the French Social Security


* type 1 diabetes mellitus or type 2 diabetes mellitus (ADA definition)
* Age : 18 to 75 years
* stable diabetes treatment for more than 3 months
* no diabetic retinopathy
* no diabetic neuropathy
* no cardiovascular diseases
* no contra-indication for coronary computed tomography angiography or myocardial perfusion scintigraphy.


* Age : 18 ; 40 years
* No diabetes
* No persistant drug use \> 3 months except contraception
* Body mass index : \[18,5 - 29,9\] kg/m2


* Active smokers
* Pregnant or breastfeeding women, women of childbearing age without effective contraception
* Known allergies to the patch.
* Skin lesions at the sensor site that may interfere with sensor placement or accuracy
* Major cardiovascular complications within the past 3 months
* Decompensated congestive heart failure
* Chronic respiratory failure
* Chronic renal failure
* Resting ambient air O2 saturation ≤95%.
* Treatment with systemic corticosteroids
* Severe hypertension (≥180 mmHg systolic pressure or ≥ 100 mmHg diastolic pressure)
* Any concomitant disease or condition that the investigator believes may compromise patient safety or affect the conduct of the study
* Anemia (Hb\<12g/dl)
* History of severe mountain sickness
* Concurrent participation in another clinical research study,
* Persons benefiting from enhanced protection


* Absolute contraindications to physical activity (HAS definitin) :
* Pulmonary arterial hypertension (\> 60 mm Hg)
* Presence of intra-cardiac thrombus
* Acute pericardial effusion
* Severe obstructive cardiomyopathy
* Symptomatic aortic stenosis
* Recent thrombophlebitis with or without pulmonary embolism
Minimum Eligible Age

18 Years

Maximum Eligible Age

75 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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Poitiers University Hospital

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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CHU

Poitiers, , France

Site Status

Countries

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France

Other Identifiers

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FOX

Identifier Type: -

Identifier Source: org_study_id

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