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.
Quick facts
| Study type | Interventional |
|---|---|
| Ages | 18 Years and up |
| Sex | All |
| Enrollment | 492 (estimated) |
| Sponsor | The University of Texas Health Science Center, Houston Academic / other |
| Locations | 2 sites (Houston, Texas and 1 other locations) |
| Status | Recruiting |
| Started | August 17, 2026 |
| Main results expected | July 1, 2028 |
| Study ends | March 1, 2029 |
| Registry record updated | August 24, 2026 |
| Trial ID | NCT06232876 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
- Principal investigator: Daniel Sessler, MD — The University of Texas Health Science Center, Houston
- Study coordinator: Muhammad Omar Naeem, MD
- Email: Muhammad.Omar.Naeem@uth.tmc.edu
- Phone: (713) 500-4383
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.