New Generation Enlite Accuracy Study

Not Applicable

Completed

Conditions: Diabetes

Interventions: Device: Glucose sensor (Enlite)

Registration Number: NCT02423798

Lead Sponsor: Medtronic Diabetes

Brief Summary: The trial will investigate the accuracy and performance of a new sensor for continuous glucose monitoring (CGM), the (new generation) Enlite, CE-marked in 2013, in conjunction with the new Medtronic 640G system components.

To evaluate the accuracy and performance of the new generation Enlite sensor. This is a postmarket, interventional, open-label, non-randomized, single center clinical research trial.

The trial will adopt a prospective single-sample design using the Yellow Spring Instruments (YSI) plasma glucose reference sampling procedure in the clinic and self-monitoring of blood glucose (SMBG) plasma glucose reference sampling procedure at home.

Detailed Description: The trial will investigate the accuracy and performance (i.e. the life-time) of a new sensor for CGM, the (new generation) Enlite glucose sensor, CE-marked in 2013, in conjunction with the new Medtronic 640G system components. Accuracy and life-time of the sensor are important parameters contributing to the safety of patients and patient acceptance of this still fairly new technology.

The current trial investigates the accuracy of the new sensor in conjunction with the new 640G system components both in the clinic and at home. This enables us to assess the sensor accuracy in a well-controlled environment using a highly accurate laboratory glucose analyzer as reference as well as sensor accuracy during real-life conditions using a blood glucose meter as reference analyzer.

The data gathered in this trial will help to understand the effect of technological advancements made and can guide future development of glucose sensor for continuous glucose monitoring.

Recruitment & Eligibility

Status: COMPLETED

Sex: All

Target Recruitment: 24

Inclusion Criteria

Subject has signed the informed consent form prior to screening
Age 18-74 years (both inclusive)
Subject has been diagnosed with T1DM
Subject is current insulin pump user for at least 3 months
HbA1c 9.5%
With the exception of T1DM, the subject is considered generally healthy upon completion of medical history, physical examination, vital signs, ECG and biochemical investigations as judged by the Investigator

Exclusion Criteria

Female of childbearing potential who is pregnant, breast-feeding or intend to become pregnant or are not using adequate contraceptive methods (adequate contraceptive measures include sterilization, hormonal intrauterine devices, oral contraceptives, sexual abstinence, vasectomized partner)
Subject has any condition that, in the opinion of the Investigator or qualified Investigational Centre staff, may preclude him/her from participating in the study and completing study related procedures.
Subject has impaired vision or hearing problems that could compromise the handling of the device as determined by Investigator or qualified Investigational Centre staff
Subject is unable to tolerate tape adhesive in the area of sensor placement
Subject has any unresolved adverse skin condition in the area of sensor placement (e.g. psoriasis, rash, Staphylococcus infection)
Subject has travel plans which would make it difficult for the subject to attend on-site study visits as scheduled
Subject is actively participating in an investigational study (drug or device) wherein he/she has received treatment from an investigational study drug or investigational study device in the last 30 days
Subject known to be positive for Hepatitis B surface antigen (HBsAg) or Hepatitis C antibodies (or diagnosed with active hepatitis according to local practice).
Positive result to the screening test for HIV-1 antibodies, HIV-2 antibodies or HIV-1 antigen according to locally used diagnostic testing
Significant history of alcoholism or drug/chemical abuse as per investigator's judgment, current regular alcohol consumption of more than 1 unit per day for women and more than 2 units per day for men [1 unit of alcohol equals 1 beer (330 mL), 1 glass of wine (120 mL), or 1 glass of spirits (40 mL)], or a positive result in the urine drug/alcohol screen at the screening visit

Study & Design

Study Type: INTERVENTIONAL

Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Open-label, single-sample design	Glucose sensor (Enlite)	The trial has an open label design with a glucose sensor intervention. Only 1 sensor system is used in the trial (no comparator). As all subjects will receive identical devices and undergo the same experimental procedures, no randomization will be performed. Furthermore, neither subjects nor clinical staff will be blinded to the sensor readings, as knowing the sensor glucose readings will not affect the accuracy endpoint.

Primary Outcome Measures

Name	Time	Method
Consensus Error Grid Analysis of Paired Sensor and Reference Plasma Glucose Values	4 months	All analysis performed using the Consensus Error Grid (or Parkes error grid) comparing the paired sensor and YSI reference glucose values. Zone A is defined in the Parkes error grid as the zone of "clinical accurate measurements with no effect on clinical action." Zone B as "altered clinical action with little or no effect on clinical outcome.". Ideal situation is 100% in Zone A + B.
Sensor Survival	4 months	sensor survival in hours
Sensor Accuracy	4 months	Sensor values were compared to YSI plasma glucose values, which is considered as the gold standard, during the frequent sample testing day (day 3). MARD = Mean of ((Absolute difference of YSI reference and Sensor glucose values / YSI reference glucose values) \* 100).