New Glucose Sensor Pediatric

An Evaluation of a New Subcutaneous Glucose Sensor in Pediatric Subjects

The purpose of this study is to assess performance of a new subcutaneous glucose sensor over a seven day sensor life when used with currently marketed Medtronic Diabetes devices. In addition performance of the new sensor will be calculated for use of the new sensor with proposed new devices using new calibration algorithms.

Study Overview

• Status: Completed
• Conditions: Type 1 Diabetes Mellitus
• Intervention / Treatment: Device: Sensor wear

Detailed Description

The first generation Medtronic MiniMed Subcutaneous Glucose Sensor (Sof-Sensor) was originally approved by the FDA for commercialization as part of the Continuous Glucose Monitoring System (CGMS) on June 15, 1999 (PMA 980022). The Sensor is composed of a microelectrode with a thin coating of glucose oxidase beneath several layers of biocompatible membrane. This same sensor was used as part of subsequent continuous glucose monitoring (CGM) systems, such as the Guardian REAL-Time and Paradigm REAL-Time sensor augmented insulin pump. The current configuration of sensor has undergone in vitro and in vivo testing. A new second-generation glucose sensor (herein referred to as the Comfort Sensor) has been developed. The first-generation glucose sensor was approved with reported sensor accuracy (MAD) of 18%; it was labeled for maximum use duration of 72 hours, using only the abdomen as an insertion site. The new sensor is shorter and has a smaller diameter, with a smaller gauge introducer needle. The new sensor inserter is designed to be used with the new sensor. The objectives of this study are to 1) Assess performance of the Comfort Sensor when used over a period of seven days with currently available devices, and 2) Assess performance of the Comfort Sensor when used over a period of seven days using new calibration algorithms (post-processed with algorithm for future devices). Accuracy data will be calculated based on comparing calibrated glucose sensor values to glucose meter values during in-home testing. The devices that will be used for gathering sensor data during this study will be: 1) the Comfort Sensor, 2) the MiniLink (Transmitter), and 3) the Guardian REAL-Time Display Device.

• Study Type: Interventional
• Enrollment (Actual): 83
• Phase: Not Applicable

Contacts and Locations

Study Locations

• United States
  • Alabama
    • Birmingham, Alabama, United States, 35213
      • University of Alabama Birmingham
  • California
    • Sacramento, California, United States, 95816
      • Sutter Institute for Medical Research
  • Florida
    • Saint Petersburg, Florida, United States, 33549
      • Endocrinology/ University of South Florida
  • Minnesota
    • Minneapolis, Minnesota, United States, 55455
      • University of Minnesota Amplatz Children's Hospital

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 7 years to 17 years (Child)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

Description

Inclusion Criteria:

1. Males and females aged 7 through 17 inclusive
2. Diagnosed with Type 1 Diabetes Mellitus
3. Willingness to perform required study and data collection procedures and to adhere to operating requirements of the Guardian REAL-TIME System
4. Willingness to perform at least 4 capillary blood glucose tests per day while wearing the Guardian REAL-TIME System
5. Subject agrees to comply with the study protocol requirements
6. Informed Consent, Assent, HIPAA Authorization, and California Experimental Subject Bill of Rights (if applicable) signed by the subject and/or parent/guardian
7. The Subject is willing to wear the Guardian REAL-Time System for 14 days (~340 hours).

Exclusion Criteria:

1. The Subject has a history of tape allergies that have not been resolved at time of enrollment
2. The Subject has any skin abnormality (e.g. psoriasis, rash, staphylococcus infection) in the area of sensor placement that have not been resolved at the time of enrollment and would inhibit them from wearing the sensors
3. Subject has a positive pregnancy test on enrollment
4. Subject is currently participating in an investigational study (drug or device)

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Other
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Sensor; All subjects that wear sensors (all subjects)	Device: Sensor wear; All subjects to wear sensors; Other Names: Enlite Sensor

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Glucose Sensor Accuracy When Compared to SMBG: Proportion of Glucose Sensor Readings That Met Accuracy Criteria [Time Frame: Days One Through Six of Sensor Use]	The primary accuracy parameter (primary effectiveness endpoint) was the comparative readings of paired sensor and SMBG glucose readings, measured on days 1 through 6. Accuracy is defined as within 20% agreement between SMBG and paired sensor (within 20 mg/dL if SMBG ≤ 80 mg/dL). Accuracy ranges from 0 - 100, with higher number suggests better accuracy.	Days one through six of sensor use

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Device Related Moderate or Device Related Severe Adverse Events	Device related moderate adverse event: low level of inconvenience or concern to the subject and may interfere with daily activities but is usually improved by simple therapeutic remedy. Device related severe adverse event: interrupts a subject's daily activity and typically requires intervening treatment. Note: device related determination is made by the site that there is a reasonable possibility that the adverse event may have been caused by the device	days one through six of sensor wear

Collaborators and Investigators

• Sponsor: Medtronic Diabetes

Study record dates

Study Major Dates

• Study Start: July 1, 2010
• Primary Completion (Actual): October 1, 2010
• Study Completion (Actual): November 1, 2010

Study Registration Dates

• First Submitted: July 9, 2010
• First Submitted That Met QC Criteria: July 12, 2010
• First Posted (Estimate): July 13, 2010

Study Record Updates

• Last Update Posted (Actual): September 4, 2020
• Last Update Submitted That Met QC Criteria: August 18, 2020
• Last Verified: August 1, 2020

More Information

Terms related to this study

• Keywords: diabetes; glucose; sensor
• Additional Relevant MeSH Terms: Glucose Metabolism Disorders; Metabolic Diseases; Immune System Diseases; Autoimmune Diseases; Endocrine System Diseases; Diabetes Mellitus; Diabetes Mellitus, Type 1
• Other Study ID Numbers: CEP232

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO