Detecting Neonatal Hypoglycemia Using Real-Time Continuous Glucose Monitoring (CGM)

Hypoglycemia is the most common metabolic problem faced after birth. The investigators will be studying the utility of using a continuous glucose monitoring(CGM) system to more closely monitor low blood sugars in newborns. The investigators will evaluate the number of hypoglycemic events detected using CGM and compare it to those detected using current standard of care screening methods.

A CGM will be subcutaneously inserted by trained staff on a healthy area of skin and will be calibrated according to the manufacturer's instructions. Blood glucose measurements will be taken using a blinded study glucometer to calibrate the device. Calibration by trained study staff will take place about every 12 hours. Sensor insertion sites will be monitored for infection throughout the course of the study by nursing and clinical staff or by trained study staff on an as needed basis. At the conclusion of the study, the CGM will be removed and assessed for signs of infection. Study duration will be up to 7 days while the patient is admitted to the hospital. Participants will be randomized into 2 groups. The control group will have a blinded CGM in place for the duration of the study. The remote monitoring group will be blinded to clinical staff. This group will have a CGM connected to an iPod that sends continuous glucose data to the study phone and will be monitored 24/7 by study staff. If a blood sugar level of <46 mg/dl is detected, the infant will first be evaluated for positioning that could be causing a falsely low value. If the infant is re-positioned and CGM continues to show a blood sugar level of <46 mg/dl, study staff will prompt the nurse taking care of the patient to obtain a capillary glucose value to verify the low blood sugar and treat it as deemed appropriate by the clinical team. The investigators will evaluate the number of hypoglycemic events that occur in the blinded CGM group versus the number that occur in the remote monitoring group to assess if the CGM is able to more sensitively detect low blood sugars in infants than current hospital standard of care measures.

Participants wear a CGM that is blinded at bedside (to participant and clinical staff) but remotely monitored by study staff. If a blood sugar less than 46 mg/dl occurs, the study staff receive a notification and ask the clinical staff to perform a confirmation standard of care glucose test.

Participants wear a blinded CGM during the study period. Values are blinded to study staff, participant, and clinical staff.

If the CGM in the remote monitoring group detects a blood sugar less than 46mg/dl, a confirmatory standard of care glucose test will be performed to confirm the low blood sugar.

Reported values in the table represent the cumulative number of hypoglycemic events detected by the sensor that were not detected by the hospital standard of care measures across all participants.

Inclusion Criteria: Infants who are at least 34 weeks gestation that are born to mothers with gestational or pre-gestational diabetes and are admitted to LPCH are eligible for the study. Exclusion Criteria: Infants <2,000 grams will be excluded from the study. Infants will also be excluded if they have an anomaly of the skin or subcutaneous tissue that would prevent proper adhesion, placement, and function of the sensor.