Accuracy and Treatment Experience of Two Glucose Monitoring Systems Tested in Patients With Type 1 Diabetes and Renal Impairment

Renal Impairment Clinical Trial

Official title:

Accuracy and Treatment Experience of Two Glucose Monitoring Systems Tested Simultaneously in Ambulatory Patients With Type 1 Diabetes and Renal Impairment

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT03378271
• Other study ID #: CGM renal impairment
• Status: Completed
• Phase: N/A
• Start date: May 5, 2016
• Est. completion date: December 31, 2022

Study information

• Verified date: February 2024
• Source: Vastra Gotaland Region
• Contact: n/a
• Is FDA regulated: No
• Study type: Interventional

Clinical Trial Summary

The study aims to evaluate the accuracy of two commercial glucose monitoring systems in patients with type 1 or type 2 diabetes and renal impairment, including patients with or without dialysis. Patients treatment experience will even be evaluated.

Description:

Continuous glucose monitoring (CGM) and Flash glucose monitoring (FGM) are tools today mainly used in the treatment of patients with type 1 diabetes. Both glucose monitors are subcutaneous tissue sensors, which provide a tissue fluid glucose measurement every 1 to 5 minutes. The real-time glucose sensor trend data can help patients with diabetes better manage their insulin needs with meals and exercise. The following glucose monitoring systems are two of the most current sensor technologies available for clinical use the Dexcom G5 (Dexcom Corporation), and the FGM (Abbot Freestyle Libre).

High glucose levels in patients with type 1 or 2-diabetes lead to increased risks of micro- and macrovascular complications, while low glucose levels may lead to unconsciousness. Therefore, it is important for patients to manage glucose levels as close to normal (4-7 mmol/l) as possible. This is generally performed by appropriate dosage of different insulins, calculated from the preprandial glucose level, carbohydrate intake, and physical activity. In spite of careful dosage, glucose levels often become too low or too high.

CGM is a novel tool to detect low and high glucose levels, and it is capable of sounding an alarm for low and high glucose levels. CGM has been available in clinical practice in Sweden for approximately 5 years. FGM is as CGM also a novel tool to detect low and high glucose levels, but is not capable of sounding an alarm for low and high glucose levels. FGM has been available in clinical practice in Sweden since late 2014.

Since both CGM and FGM measure the glucose level by a sensor in subcutaneous tissue, there is uncertainty in the estimation of blood glucose levels. The accuracy of a certain CGM or FGM system can be assessed by comparing the glucose levels estimated by the glucose monitors with measured glucose levels in capillary blood samples. To our knowledge there are no studies comparing the accuracy of the Dexcom G5 sensor with the Freestyle Libre sensor. In the current study, we will compare the accuracy and treatment experience of these two glucose monitoring sensors available on the market for clinical use in patients with type 1 or 2 diabetes and renal impairment with an eGFR<30 ml/min both in and not in dialysis.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 40
• Est. completion date: December 31, 2022
• Est. primary completion date: December 30, 2019
• Accepts healthy volunteers: No
• Gender: All
• Age group: 18 Years to 79 Years

Eligibility

Inclusion Criteria:

1. Type 1 or type 2 diabetes with renal impairment and eGFR <30 ml/min measured within the last three months.

2. Adult patients, age 18 or older and <80 years.

3. Written Informed Consent

Exclusion criteria:

1. Pregnancy

2. Patients with severe cognitive dysfunction or other disease which makes glucose monitoring use difficult.

3. Patients requiring continuous use of paracetamol. Paracetamol must not have been used the week before the study and shall not be used during the duration because it disturbs the interpretation of blood glucose levels estimated by the Dexcom G5. However, other pain killers can be used throughout the study period.

4. Current CGM or FGM use.

5. History of allergic reaction to any of the CGM or FGM materials or adhesives in contact with the skin.

6. History of allergic reaction to chlorhexidine or alcohol anti-septic solution.

7. Abnormal skin at the anticipated glucose sensor attachment sites (excessive hair, burn, inflammation, infection, rash, and/or tattoo).

8. Patients with renal impairment and eGFR greater or equal to 30 ml/min estimated by the MDRD formula.

Related Conditions & MeSH terms

• Diabetes Complications
• Diabetes Mellitus
• Diabetes Mellitus Complication
• Diabetes Mellitus, Type 1
• Renal Impairment
• Renal Insufficiency

Intervention

Device:
• Simultanious CGM/FGM
Patients will use both CGM and FGM and document their values as well as documenting a capillary blood glucose value.

Locations

Country	Name	City	State
Sweden	NU-Hospital Group	Uddevalla

Sponsors (1)

Lead Sponsor	Collaborator
Vastra Gotaland Region

Country where clinical trial is conducted

Sweden, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Accuracy of CGM and FGM	Evaluation of accuracy in estimating capillary glucose levels of two commercial glucose monitoring systems (CGM and FGM), Dexcom G5 system (Dexcom sensor) and the Abbot Freestyle Libre sensor, in ambulatory patients with type 1 or type 2 diabetes and renal impairment with an eGFR<30 ml/min both in and not in dialysis.	The whole study period Day 1-14
Secondary	The evaluation of the accuracy of the 2 glucose monitoring systems during each studied time interval (day 1-3 and day 4-6)	The evaluation of the accuracy of the 2 glucose monitoring systems for various glucose intervals (hypo, normo- and hyperglycaemia)	Day 1-6 of study period
Secondary	The evaluation of the accuracy of the 2 glucose monitoring systems for various glucose intervals (hypo, normo- and hyperglycaemia)		The whole study period Day 1-14
Secondary	The evaluation of the accuracy of the 2 glucose monitoring systems during dialysis and not in dialysis		The whole study period Day 1-14
Secondary	The evaluation of patients preferences and experience of the two glucose monitoring systems.	Patients will answer questionnaires on both systems to see which system they prefer to use and find more user friendly. the questionnaire will be in the form of a Lickert scale from 0-10.	The whole study period Day 1-14