Towards Novel BIOmarkers to Diagnose SEPsis on the Emergency Room (BIOSEP)

September 29, 2025 updated by: W. J. Wiersinga, MD, Amsterdam University Medical Centers (UMC), Location Academic Medical Center (AMC)

Objectives:

  1. To compare the immune response of patients with or without sepsis presenting to the ED with a(n) (suspected) infection.
  2. To determine immune response aberrations that are associated with an increased risk of developing sepsis in patients presenting to the ED with a(n) (suspected) infection without sepsis.
  3. To determine the long term cognitive and physical sequelae of sepsis after admission.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

Sepsis will be defined in accordance with the current Sepsis 3.0 criteria as a(n) (suspected) infection with evidence of organ failure, as reflected by a SOFA (Sequential Organ Failure Assessment) score of ≥2. Notably, a molecular definition of sepsis does not exist and there is no pathological gold standard; therefore, in accordance with the current international consensus, the investigators consider the commonly used clinical organ failure (SOFA) criteria as the best option. The SOFA score is composed of six organ dysfunctions (cardiovascular, pulmonary, renal, hepatic, coagulation and neurological). The SOFA score was developed for ICU patients, but its components can be easily scored in an ED (and hospital ward) setting with the exception of the pulmonary component; this pulmonary dysfunction score is based on the PaO2/FiO2 (PF) ratio, wherein PaO2 is the partial pressure of oxygen in arterial blood and FiO2 the fraction of inspired oxygen. Measurement of the PaO2 requires an arterial blood puncture, which is not routinely done on the ER or hospital ward. Therefore, the investigators will use an alternative method to determine the respiratory SOFA by determining the SpO2/FiO2 (SF) ratio, wherein SpO2 is peripheral oxygen saturation. SpO2 is routinely measured by finger pulse oximeter in patients with suspected infection; FiO2 is 21% when breathing room temperature and increases by 4% with each liter of oxygen provided per minute to a patient via a nasal cannula. Cut-off values for SF ratios correlating with SOFA pulmonary scores based on PF ratios have been validated in large data sets.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
3300

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Contact Backup

Study Locations

  • Netherlands
    • Flevoland
      • Almere Stad, Flevoland, Netherlands, 1315RA
        • Not yet recruiting
        • Flevoziekenhuis
        • Contact:
    • North Holland
      • Amsterdam, North Holland, Netherlands, 1081HZ
        • Recruiting
        • Amsterdam UMC, location VUmc
        • Contact:
      • Amsterdam, North Holland, Netherlands, 1105AZ
        • Recruiting
        • Amsterdam UMC, location AMC
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Sampling Method

Non-Probability Sample

Study Population

The research population will include adult patients that present to the ED of participating hospitals. In order to be eligible to participate in the BIOSEP study there must also be a clinical suspicion of an infection or a confirmed infection and MEWS of 2 or higher.

Description

Inclusion Criteria:

  • Age 18 years or higher
  • Presentation at the Emergency Department (ED)
  • Clinical suspicion of infection or earlier confirmed infection
  • Modified Early Warning Score (MEWS) of 2 or higher

Exclusion Criteria:

  • No informed consent given

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort

Group / Cohort

A group or subgroup of participants in an observational study that is assessed for biomedical or health outcomes.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Patients with infection
Patients with an (suspected) infection and a MEWS score 2 or higher
Other: No intervention
There is no intervention

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Final diagnosis for hospitalization
Time Frame: 4 years
Adjudicated diagnoses for hospitalization
4 years
Disease severity
Time Frame: During hospitalization (up to day 180)
Sequential Organ Failure Assesment (SOFA) score (minimum 0, maximum 24) collected during admission
During hospitalization (up to day 180)
Mortality
Time Frame: 4 years
Mortality at day 30
4 years

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Length of stay
Time Frame: During hospitalization (up to day 180)
Both hospital and ICU stay
During hospitalization (up to day 180)
Mortality
Time Frame: 5 years
Hospital, ICU, 28-day, 90-day and 1 year mortality
5 years
Post-sepsis sequelae
Time Frame: Up to 1 year after sepsis episode
Up to 1 year post sepsis, e.g. decreased executive functions, weakness, fatigue etc.)
Up to 1 year after sepsis episode
Readmissions
Time Frame: 5 years
All cause readmissions in the first year after discharge
5 years

Other Outcome Measures

Other Outcome Measures

For clinical trials, a planned measurement described in the protocol that is used to determine the effect of an intervention/treatment on participants. For observational studies, a measurement or observation that is used to describe patterns of diseases or traits, or associations with exposures, risk factors, or treatment. Types of outcome measures include primary outcome measure and secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Site of infection
Time Frame: 4 years
Site of infection
4 years
Initiated therapies during admission
Time Frame: 4 years
Initiated therapies during admission
4 years

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Amsterdam University Medical Centers (UMC), Location Academic Medical Center (AMC)

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
Amsterdam UMC, location VUmc
Flevoziekenhuis

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Willem Joost Wiersinga, MD, PhD, Amsterdam UMC, location AMC

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
October 25, 2022

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
October 1, 2026

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
October 1, 2026

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
November 23, 2023

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
December 11, 2023

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
December 21, 2023

Study Record Updates

Last Update Posted (Estimated)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
October 2, 2025

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
September 29, 2025

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
February 1, 2025

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • BIOSEP

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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