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Evaluation of Levothyroxine Replacement Therapy After Total Thyroidectomy Using a Smart Wristband
Sponsor: Yeditepe University Hospital
Summary
The goal of this observational study is to determine whether nighttime heart rate and heart rhythm data collected by a smart wristband can identify under- or over-replacement with levothyroxine before the routine 1-month thyroid function tests in adults who have undergone total thyroidectomy. After total thyroidectomy, patients usually start levothyroxine replacement therapy, and the dose is adjusted about 1 month later based on thyroid function tests. This study aims to determine whether changes in nighttime heart rate and heart rhythm can provide an earlier indication that the levothyroxine dose is too low or too high. The main questions it aims to answer are: Can nighttime heart rate and heart rhythm measured by a smart wristband identify under- or over-replacement with levothyroxine before routine thyroid function testing? How well do smart wristband measurements agree with thyroid function test results? Participants will: Wear a smart wristband after total thyroidectomy. Continue taking levothyroxine as prescribed by their physician. Undergo routine thyroid function testing approximately 1 month after surgery as part of standard clinical care. Allow researchers to compare smart wristband measurements with thyroid function test results to evaluate whether wearable data can provide an earlier indication of inadequate or excessive levothyroxine replacement.
Official title: Comparative Evaluation of the Effectiveness of Levothyroxine Replacement Therapy After Total Thyroidectomy Using Smart Wristband-Measured Nocturnal Heart Rate and Heart Rhythm Parameters Versus Thyroid Function Tests
Key Details
Gender
All
Age Range
18 Years - Any
Study Type
OBSERVATIONAL
Enrollment
40
Start Date
2026-07-22
Completion Date
2027-02-01
Last Updated
2026-07-29
Healthy Volunteers
No
Interventions
Xiomi Smart Band 10
Participants will wear a smart wristband continuously during the first postoperative month following total thyroidectomy. The device will passively record nighttime heart rate and heart rhythm data without affecting routine clinical care. The collected physiological data will be compared with thyroid function test results obtained 1 month after surgery to evaluate whether wearable-derived measurements can identify under- or over-replacement with levothyroxine before routine biochemical assessment.
Locations (1)
Yeditepe University Koşuyolu Hospital
Istanbul, Kadıköy, Turkey (Türkiye)