Clinical trial Recruiting at 1 site Observational Ages 18 and up

Non-invasive forearm optical monitoring to predict fluid response in critically ill patients

Official title: Assessing Fluid-responsiveness Using Non-invasive Hybrid Diffuse Optics on Peripheral Muscle

Run by Corporacion Parc Tauli · NCT07298720 · Data updated 2026-11-12

This study will try to see if a non-invasive optical sensor placed on the forearm can predict which critically ill patients will have their cardiac output increase after a passive leg-raising test.

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Quick facts

Study typeObservational
Ages18 Years and up
SexAll
Enrollment200 (estimated)
SponsorCorporacion Parc Tauli
Academic / other
Locations1 site (Sabadell, Spain/ Barcelona)
StatusRecruiting
StartedJanuary 7, 2025
Main results expectedJanuary 1, 2027
Study endsJanuary 1, 2027
Registry record updatedMarch 18, 2026
Trial IDNCT07298720 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Critically ill adults in the ICU who have an arterial line and are undergoing a passive leg-raising assessment and who do not meet exclusion criteria such as pregnancy, intra-abdominal hypertension, or elevated intracranial pressure.

Probably not a fit

Patients without an arterial line, non-ICU patients, pregnant patients, and those with intra-abdominal hypertension or raised intracranial pressure are unlikely to benefit or be eligible.

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

What this trial studies

This proof-of-concept observational study enrolls ICU patients undergoing a passive leg-raising (PLR) maneuver to provoke transient changes in preload. A hybrid diffuse optics (hDOS) probe is placed on the brachioradialis muscle to record microvascular blood flow index (BFI) and tissue oxygen saturation (StO2) while cardiac output (CO) is measured continuously from an arterial-line based pulse waveform monitor. Investigators will examine correlations over time between CO and the microvascular variables and determine whether changes in BFI or StO2 predict a positive CO response (>10% increase). Enrollment and measurements occur at a single center in Sabadell, Spain, for proof-of-concept performance rather than direct clinical decision-making.

Why it matters

Potential benefit: If successful, this approach could provide a bedside, non-invasive way to identify who is likely to benefit from fluids, reducing unnecessary fluid administration and its complications.

How similar studies have gone: Prior work combining passive leg raising with arterial waveform CO and peripheral vascular/near-infrared measurements has shown promise, but using hybrid diffuse optics on muscle is novel and remains at the proof-of-concept stage.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Invasive blood pressure monitoring through an arterial line

Exclusion Criteria:

* Patients with suspected pregnancy
* Intra-abdominal hypertension
* Elevated intracranial pressure

Where it's running

  • Parc Taulí Hospital Universitari
    Sabadell, Spain/ Barcelona, Spain
    Recruiting

Study contacts

Similar studies

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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.
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.