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Evaluation of Levothyroxine Replacement Therapy After Total Thyroidectomy Using a Smart Wristband (SMART-THY)

24 juillet 2026 mis à jour par: Banu Erkal, Yeditepe University Hospital

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

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.

Aperçu de l'étude

Statut

Recrutement

Les conditions

Intervention / Traitement

Description détaillée

Total thyroidectomy is commonly performed for both benign and malignant thyroid diseases. Following surgery, lifelong levothyroxine replacement therapy is required to maintain euthyroidism. The initial levothyroxine dose is generally determined according to clinical characteristics such as body weight and is subsequently adjusted based on thyroid function tests, which are routinely performed approximately 4 to 6 weeks after surgery. During this period, some individuals may experience symptoms related to under-replacement or over-replacement before biochemical assessment becomes available.

Thyroid hormones have well-established effects on the cardiovascular system. Alterations in thyroid hormone levels can influence heart rate, cardiac rhythm, and autonomic nervous system activity. Recent advances in wearable technology have enabled continuous, noninvasive monitoring of physiological parameters, including nighttime heart rate and heart rhythm. These measurements may provide early physiological changes associated with inadequate thyroid hormone replacement.

The primary objective of this prospective observational study is to evaluate whether nighttime heart rate and heart rhythm data obtained from a smart wristband can identify under-replacement or over-replacement of levothyroxine before the routine postoperative thyroid function assessment. Smart wristband-derived physiological measurements will be compared with serum thyroid-stimulating hormone (TSH) and free thyroxine (fT4) levels obtained during standard postoperative follow-up.

The study will enroll adults undergoing total thyroidectomy who require postoperative levothyroxine replacement therapy. Participants will wear a smart wristband during the early postoperative period while continuing standard clinical care. No experimental intervention or modification of routine treatment will be performed. The findings may help determine whether wearable device-derived physiological data can serve as an early, noninvasive indicator of inadequate levothyroxine replacement and support more timely dose adjustment after total thyroidectomy.

Type d'étude

Observationnel

Inscription (Estimé)

40

Contacts et emplacements

Cette section fournit les coordonnées de ceux qui mènent l'étude et des informations sur le lieu où cette étude est menée.

Coordonnées de l'étude

Sauvegarde des contacts de l'étude

Lieux d'étude

  • Turquie (Türkiye)
    • Kadıköy
      • Istanbul, Kadıköy, Turquie (Türkiye), 34718
        • Recrutement
        • Yeditepe University Kosuyolu Hospital
        • Contact:
        • Contact:

Critères de participation

Les chercheurs recherchent des personnes qui correspondent à une certaine description, appelée critères d'éligibilité. Certains exemples de ces critères sont l'état de santé général d'une personne ou des traitements antérieurs.

Critère d'éligibilité

Âges éligibles pour étudier

  • Adulte
  • Adulte plus âgé

Accepte les volontaires sains

Non

Méthode d'échantillonnage

Échantillon non probabiliste

Population étudiée

The study population consists of adults undergoing total thyroidectomy who require postoperative levothyroxine replacement therapy. Participants will be recruited from the Department of General Surgery at Yeditepe University Koşuyolu Hospital. All participants will receive standard postoperative care and wear a smart wristband during the first postoperative month for continuous monitoring of nighttime heart rate and heart rhythm.

La description

Inclusion Criteria:

Age 18 years or older. Undergoing total thyroidectomy at the Department of General Surgery, Yeditepe University Faculty of Medicine Hospital.

Initiation of levothyroxine as part of routine postoperative clinical care. Willing and able to attend the routine 1-month postoperative thyroid function test follow-up visit.

Willing and able to wear the Xiaomi Smart Band 10 throughout the study period. Able to provide written informed consent.

Exclusion Criteria:

History of cardiac arrhythmia. Current use of beta-blockers or other antiarrhythmic medications that may affect heart rate.

History of heart failure or advanced cardiovascular disease. Diagnosed sleep disorders that may interfere with nighttime heart rate measurements.

Pregnancy. Inability or unwillingness to wear the smart wristband as required. Missing clinical or laboratory data required for outcome assessment. Refusal to participate or withdrawal of informed consent.

Plan d'étude

Cette section fournit des détails sur le plan d'étude, y compris la façon dont l'étude est conçue et ce que l'étude mesure.

Comment l'étude est-elle conçue ?

Détails de conception

Cohortes et interventions

Groupe / Cohorte
Intervention / Traitement
Total Thyroidectomy Patients Receiving Levothyroxine
Adults undergoing total thyroidectomy who receive standard postoperative levothyroxine replacement therapy. Participants will wear a smart wristband during the early postoperative period to continuously record nighttime heart rate and heart rhythm. They will undergo routine thyroid function testing, including serum thyroid-stimulating hormone (TSH) and free thyroxine (fT4), 1 month after surgery as part of standard clinical care. Smart wristband-derived physiological data will be compared with thyroid function test results to evaluate whether wearable monitoring can identify under- or over-replacement with levothyroxine before the routine 1-month biochemical assessment.
Dispositif: 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.

Que mesure l'étude ?

Principaux critères de jugement

Mesure des résultats
Description de la mesure
Délai
Diagnostic Performance of Smart Wristband-Derived Nighttime Heart Rate and Heart Rhythm for Detecting Inadequate Levothyroxine Replacement
Délai: 1 month after total thyroidectomy
To evaluate the ability of nighttime heart rate and heart rhythm parameters recorded by a smart wristband during the first postoperative month to identify under- or over-replacement with levothyroxine, using thyroid function tests (TSH and free T4) obtained 1 month after total thyroidectomy as the reference standard.
1 month after total thyroidectomy

Mesures de résultats secondaires

Mesure des résultats
Description de la mesure
Délai
Correlation Between Smart Wristband Physiological Data and Thyroid Function Tests
Délai: 1 month after total thyroidectomy
To assess the correlation between nighttime heart rate and heart rhythm parameters and serum TSH and free thyroxine (fT4) levels measured 1 month after surgery.
1 month after total thyroidectomy
Prediction of Levothyroxine Dose Adjustment
Délai: 1 month after total thyroidectomy
To evaluate whether smart wristband-derived physiological measurements can predict the need for levothyroxine dose adjustment at the first postoperative follow-up visit.
1 month after total thyroidectomy

Collaborateurs et enquêteurs

C'est ici que vous trouverez les personnes et les organisations impliquées dans cette étude.

Parrainer

Yeditepe University Hospital

Publications et liens utiles

La personne responsable de la saisie des informations sur l'étude fournit volontairement ces publications. Il peut s'agir de tout ce qui concerne l'étude.

Publications générales

Dates d'enregistrement des études

Ces dates suivent la progression des dossiers d'étude et des soumissions de résultats sommaires à ClinicalTrials.gov. Les dossiers d'étude et les résultats rapportés sont examinés par la Bibliothèque nationale de médecine (NLM) pour s'assurer qu'ils répondent à des normes de contrôle de qualité spécifiques avant d'être publiés sur le site Web public.

Dates principales de l'étude

Début de l'étude (Réel)

22 juillet 2026

Achèvement primaire (Estimé)

31 décembre 2026

Achèvement de l'étude (Estimé)

1 février 2027

Dates d'inscription aux études

Première soumission

24 juillet 2026

Première soumission répondant aux critères de contrôle qualité

24 juillet 2026

Première publication (Réel)

29 juillet 2026

Mises à jour des dossiers d'étude

Dernière mise à jour publiée (Réel)

29 juillet 2026

Dernière mise à jour soumise répondant aux critères de contrôle qualité

24 juillet 2026

Dernière vérification

1 juillet 2026

Plus d'information

Termes liés à cette étude

Mots clés

Termes MeSH pertinents supplémentaires

Autres numéros d'identification d'étude

  • 20260606Y1173

Plan pour les données individuelles des participants (IPD)

Prévoyez-vous de partager les données individuelles des participants (DPI) ?

NON

Description du régime IPD

Individual participant data will not be shared because the study involves a single-center observational cohort, and no plans have been made for public data sharing. Participant confidentiality and privacy will be protected in accordance with institutional policies and applicable regulations.

Informations sur les médicaments et les dispositifs, documents d'étude

Étudie un produit pharmaceutique réglementé par la FDA américaine

Non

Étudie un produit d'appareil réglementé par la FDA américaine

Non

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