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New sensor aims to take the guesswork out of IV fluids during surgery

NCT ID NCT03706430

Knowledge-focused Sponsor: Masimo Corporation Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early This study
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study tested a new sensor measure called RPVi to see if it can predict how patients will respond to fluids during surgery. Researchers compared RPVi to standard methods in 63 adults having elective surgery. The study was terminated early, so the findings are limited.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

Active substance
Pulse CO-Oximeter sensor (device)
What this could lead to
If successful, this could improve how doctors manage fluids during surgery, potentially reducing complications.
What could go wrong
The study was terminated early with only 63 participants, so results are limited and may not be reliable. The device is still investigational.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

63 people

The number who actually took part.

Started

Sep 2018

Finished

Oct 2021

Lead sponsor

A company

The lead sponsor is a pharmaceutical, biotech, or medical-device company.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Ages

18 years and older

Sex

Anyone

Healthy volunteers

Not accepted

This study is not open to healthy volunteers. The entry requirements below say who it is open to.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * 18 years of age or older at the time of consent * Scheduled for elective surgery requiring general anesthesia and mechanical ventilation * Arterial line and other standard of care line placement indicated as part of the scheduled surgical procedure Exclusion Criteria: * Patients diagnosed with or history of heart failure, angina, pulmonary heart disease, rheumatic heart disease, cardiomyopathy, congenital heart disease, or valvular heart disease. * Patients scheduled for or has had a liver transplant * Patients with surgeries at or around site of sensor placement or skin abnormalities affecting the sensor placement area such as psoriasis, eczema, angioma, scar tissue, burn, fungal infection, substantial skin breakdown, nail polish or acrylic nails that would prevent monitoring of pulse-oximeter physiological parameters during the study. * Patients with cardiac arrhythmias * Patients with intracardiac shunts

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As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Anesthesia Surgery

Contacts and locations

Locations

  • University of California, Los Angeles

    Los Angeles, California, 90095, United States

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