Using smartwatches, smart rings, and AI to predict who may be readmitted after surgery

Is this trial a fit for you?

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This observational study will continuously collect physiological and behavioral data before and after elective medium or large surgeries using a smartwatch and a smart ring, capturing metrics such as heart rate, ECG traces, oxygen saturation, sleep patterns, blood pressure trends, bioimpedance-based body composition, and stress indicators. Collected signals will be linked to clinical records and 30-day readmission outcomes and used to train and test deep learning models to identify patterns associated with unplanned return visits. The workflow emphasizes noninvasive, wearable monitoring combined with AI to detect early or subtle signs of postoperative complications that routine checks may miss. Study activities occur at Getúlio Vargas University Hospital with device fitting, data collection, and follow-up performed locally.

Why it matters

Who can join: the full rules

Inclusion Criteria:

* Adults over 18 years of age;
* Hospitalization for medium and/or large elective surgery at HUGV;
* Conscious and oriented patients who have sufficient understanding to answer questionnaires and use wearable devices for the study;
* Have minimal skills in the use of wearable technologies;
* Patients who have agreed to participate voluntarily in the research by signing the Informed Consent Form (ICF).

Non-inclusion Criteria:

* Presence of tattoos or any other skin condition (skin pathologies or skin diseases such as vitiligo, lupus, and atopic dermatitis, among others) that affects the area of the wrist or finger where the wearable sensors are located;
* Presence of any type of sensitivity or allergic reaction, of any degree, to the materials of the wearables (smartwatch and smartring);
* Pregnant and lactating women;
* Participants with implantable cardiac devices, such as pacemakers, cardioverter defibrillators, and resynchronization devices;
* Participants in drugs abuse;

Exclusion Criteria:

* Severe medical conditions and decompensations prior to surgery;
* Patients who die before hospital discharge;
* Patients with an expected postoperative hospital stay of more than 10 days.

Where it's running

• Getúlio Vargas University Hospital
  Manaus, Amazonas, Brazil Recruiting

Study contacts

• Principal investigator: Robson Luís Oliveira de Amorim — Getúlio Vargas University Hospital
• Study coordinator: Robson Luís Oliveira de Amorim, PhD
• Email: robsonamorim@ufam.edu.br
• Phone: +55 92 99403-4101

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How to take part

1. Review the eligibility criteria above with your treating physician.
2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.