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

24 luglio 2026 aggiornato da: 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.

Panoramica dello studio

Stato

Reclutamento

Condizioni

Intervento / Trattamento

Descrizione dettagliata

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.

Tipo di studio

Osservativo

Iscrizione (Stimato)

40

Contatti e Sedi

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Contatto studio

Backup dei contatti dello studio

Luoghi di studio

Criteri di partecipazione

I ricercatori cercano persone che corrispondano a una certa descrizione, chiamata criteri di ammissibilità. Alcuni esempi di questi criteri sono le condizioni generali di salute di una persona o trattamenti precedenti.

Criteri di ammissibilità

Età idonea allo studio

  • Adulto
  • Adulto più anziano

Accetta volontari sani

No

Metodo di campionamento

Campione non probabilistico

Popolazione di studio

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.

Descrizione

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.

Piano di studio

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Come è strutturato lo studio?

Dettagli di progettazione

Coorti e interventi

Gruppo / Coorte
Intervento / Trattamento
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.
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.

Cosa sta misurando lo studio?

Misure di risultato primarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Diagnostic Performance of Smart Wristband-Derived Nighttime Heart Rate and Heart Rhythm for Detecting Inadequate Levothyroxine Replacement
Lasso di tempo: 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

Misure di risultato secondarie

Misura del risultato
Misura Descrizione
Lasso di tempo
Correlation Between Smart Wristband Physiological Data and Thyroid Function Tests
Lasso di tempo: 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
Lasso di tempo: 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

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Sponsor

Pubblicazioni e link utili

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Pubblicazioni generali

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Queste date tengono traccia dell'avanzamento della registrazione dello studio e dell'invio dei risultati di sintesi a ClinicalTrials.gov. I record degli studi e i risultati riportati vengono esaminati dalla National Library of Medicine (NLM) per assicurarsi che soddisfino specifici standard di controllo della qualità prima di essere pubblicati sul sito Web pubblico.

Studia le date principali

Inizio studio (Effettivo)

22 luglio 2026

Completamento primario (Stimato)

31 dicembre 2026

Completamento dello studio (Stimato)

1 febbraio 2027

Date di iscrizione allo studio

Primo inviato

24 luglio 2026

Primo inviato che soddisfa i criteri di controllo qualità

24 luglio 2026

Primo Inserito (Effettivo)

29 luglio 2026

Aggiornamenti dei record di studio

Ultimo aggiornamento pubblicato (Effettivo)

29 luglio 2026

Ultimo aggiornamento inviato che soddisfa i criteri QC

24 luglio 2026

Ultimo verificato

1 luglio 2026

Maggiori informazioni

Termini relativi a questo studio

Altri numeri di identificazione dello studio

  • 20260606Y1173

Piano per i dati dei singoli partecipanti (IPD)

Hai intenzione di condividere i dati dei singoli partecipanti (IPD)?

NO

Descrizione del piano 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.

Informazioni su farmaci e dispositivi, documenti di studio

Studia un prodotto farmaceutico regolamentato dalla FDA degli Stati Uniti

No

Studia un dispositivo regolamentato dalla FDA degli Stati Uniti

No

Queste informazioni sono state recuperate direttamente dal sito web clinicaltrials.gov senza alcuna modifica. In caso di richieste di modifica, rimozione o aggiornamento dei dettagli dello studio, contattare register@clinicaltrials.gov. Non appena verrà implementata una modifica su clinicaltrials.gov, questa verrà aggiornata automaticamente anche sul nostro sito web .