Clinical trial Recruiting at 1 site Interventional Ages 18 and up

Continuous postoperative vital sign monitoring: blinded vs unblinded wearable sensor

Official title: Continuous Versus Intermittent Ward Monitoring on Vital Sign Abnormalities, Clinical Interventions, and Serious Complications: the CONSTANT Trial

Run by The University of Texas Health Science Center, Houston · NCT06232876 · Data updated 2026-11-12

This study tests whether keeping clinicians blinded to continuous heart rate, oxygen saturation, and breathing data vs making data visible affects patient safety after major non-cardiac surgery.

More Bariatric Surgery trials

Quick facts

Study typeInterventional
Ages18 Years and up
SexAll
Enrollment492 (estimated)
SponsorThe University of Texas Health Science Center, Houston
Academic / other
Locations2 sites (Houston, Texas and 1 other locations)
StatusRecruiting
StartedAugust 17, 2026
Main results expectedJuly 1, 2028
Study endsMarch 1, 2029
Registry record updatedAugust 24, 2026
Trial IDNCT06232876 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults (≥18 years) undergoing major non-cardiac surgery lasting at least 1.5 hours and anticipated to stay at least two postoperative nights, with suitable monitors available.

Probably not a fit

Patients who do not experience cardiopulmonary events or whose care is not influenced by continuous data may not benefit.

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

What this trial studies

Adults undergoing major non-cardiac surgery are randomized to receive continuous postoperative vital sign monitoring with a wearable sensor, either blinded or unblinded to clinicians. The wearable measures oxygen saturation, ventilation, and pulse rate and wires to a monitor for continuous data collection. The trial uses predefined thresholds for desaturation and abnormal respiratory and heart rate events to guide clinician alerts. The goal is to see if visibility of continuous data influences detection and management of deterioration during the early postoperative period. This is a single-center randomized trial comparing two monitoring approaches.

Why it matters

Potential benefit: If successful, continuous monitoring with clinician access to real-time data could improve early detection of cardiopulmonary deterioration and reduce postoperative complications.

How similar studies have gone: Previous work suggests that continuous vital sign monitoring can help detect deterioration, but the impact of clinician blinding to such data is less well established.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

1. Are admitted to one of the wards equipped with the Masimo Radius PPG and Rad-97 monitors;
2. Are ≥18 years old;
3. Are designated American Society of Anesthesiologists physical status 1-4;
4. Had major noncardiac surgery lasting at least 1.5 hours;
5. Are expected to remain hospitalized at least two postoperative nights;
6. Had general anesthesia with or without neuraxial anesthesia.

Exclusion Criteria:

1. Have language, vision, or hearing impairments that may compromise continuous monitoring;
2. Are designated Do Not Resuscitate, hospice, or receiving end of life care;
3. Have previously participated in the study.

Where it's running

  • Memorial Hermann Hospital
    Houston, Texas, United States
    Recruiting
  • The University of Texas Health Science Center at Houston
    Houston, Texas, United States
    Not yet recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

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.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.