A pH-Responsive Hydrogel Microneedle Patch for Continuous Measurement of Ketone Bodies and Glucose: CGM-CKM
Mahla Poudineh
Summary
The goal of this study is to evaluate a CGM-CKM device during insulin suspension in patients with type 1 diabetes. 10 patients with T1D will be recruited for a pilot study. The patients will visit CTRU at Stanford Medical School. The CGM-CKM device will be applied to the upper arm area of patients and baseline ketone and glucose measurement will be performed for one hour prior to suspending or disconnecting the pump. Upon baseline measurement, the pump will be disconnected for 3 hours while the electrochemical signals are collected from the CGM-CKM device. During the 3 hours of pump disconnection, blood samples will be collected every 5 minutes from participants for analyzing their insulin and glucagon using conventional ELISA kits and glucose and ketone using standard meters.
Description
This is a non-significant risk (NSR) device study not conducted under an IDE, in accordance with 21 CFR 812.2(b)
Eligibility
- Age range
- 18–65 years
- Sex
- All
- Healthy volunteers
- No
Inclusion Criteria: * Clinical diagnosis of type 1 diabetes for at least 1 year without significant endogenous insulin production * Currently using insulin pump * Understanding and willingness to follow the protocol and sign informed consent. * Willingness to sign a consent for release of medical information at the time of enrollment * Ability to speak, read and write in the language of the investigators. Exclusion Criteria: * History of DKA or severe hypoglycemia within the past 6 months * eGFR \<45 mL/min/1.73 m2 or other significant renal impairment * Pregnancy or breastfeeding * Current…
Interventions
- BehavioralTemporary Insulin Suspension
Participants will suspend insulin delivery from their personal insulin pumps for up to 3 hours. Insulin suspension is temporary and participant-driven under supervision.
- DeviceGlucose and ketone sensor
The participants wear a prototype continuous glucose-ketone monitoring (CGM-CKM) device using painless hydrogel microneedles for 4 hours.
Location
- Stanford UniversityPalo Alto, California