External Carotid Blood Flow in Individuals With Post-Bariatric Hypoglycemia

This is a pilot study (small-scale study) that aims to understand more about how blood flow changes in people who have low blood sugar after bariatric surgery (post-bariatric hypoglycemia) compared to those who have had surgery without hypoglycemia, those who have hypoglycemia without surgery, or those who do not experience low blood sugar. This study has two phases. This is the first phase, and the purpose is to test comfort and feasibility of a novel in-ear wearable device (Lumia Health) that measures blood flow changes to the head. Information from the study will help the investigators determine if the device is suitable to be used in the second phase of the study.

NCT Number	NCT07082478
Lead Sponsor	Joslin Diabetes Center
Conditions	Hypoglycemia, Cerebral Blood Flow
Enrollment	5 participants
Start Date	2025-07-28
Primary Completion	2026-09-15 (estimated)
Study Completion	2026-09-15 (estimated)
Updated on ClinicalTrials.gov	2025-11-28