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A simple blood test trend may flag ICU patients at risk

NCT ID NCT07761832

Knowledge-focused Sponsor: Hospital H+ Queretaro Source: ClinicalTrials.gov ↗

What the study statuses mean

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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 This study
The trial has finished. Results may not be published yet.
Stopped early
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This status has not been confirmed recently, so it may be out of date.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 Aug 12, 2026 · Last updated Aug 13, 2026 · Updated 1 time

Summary

This observational study looks at whether a fast drop in hemoglobin during the first 24 hours in the ICU can predict a longer stay (8 days or more) or death in the hospital. Researchers will review medical records of about 128 critically ill adults, comparing their hemoglobin levels at admission and roughly a day later. No extra tests or treatments are given—only routine data is analyzed. If the link holds, this simple trend could help identify high-risk patients earlier.

What this could mean

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

What this could lead to
If early hemoglobin decline reliably predicts worse outcomes, doctors could flag high-risk ICU patients sooner and tailor monitoring or transfusions to improve care.
What could go wrong
This is an observational study, so it can show links but not prove cause. Results may not apply to all ICU patients, and the 128-person sample is relatively small.

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

128 people

The number who actually took part.

Started

Jul 2026

Finished

Jul 2026

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

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

Who is studied

dult patients admitted to the Intensive Care Unit at Hospital H+ Querétaro, Mexico, between January 2024 and January 2026, who required an ICU stay of more than 48 hours and had serial hemoglobin measurements during routine medical care.

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: * Adult patients (aged 18 years or older) admitted to the Intensive Care Unit (ICU) between January 2024 and January 2026. * ICU length of stay greater than 48 hours. * At least two hemoglobin determinations obtained with an interval of approximately 24 hours apart during routine medical care. Exclusion Criteria: * Massive bleeding upon ICU admission. * Massive transfusion protocol activation. * Pregnancy. * Hemoglobinopathies. * Active hemolytic anemia. * Medical records with insufficient information for analysis.

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Conditions

The condition(s) this trial relates to.

anemia Critical Illness

As listed by the trial registrant

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

Anemia Critical illness

Contacts and locations

Locations

  • Hospital H+ Querétaro, Santiago de Querétaro, Querétaro

    Querétaro City, Querétaro, 76000, Mexico

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