Breath Analysis for the Detection of Invasive Fungal Infections (REDEFINE)

April 9, 2025 updated by: Jeremy Deuel, University of Zurich

Real-time Breath Analysis for the Detection of Invasive Fungal Infections in Neutropenic High-risk Patients

Patients with leukemia and concomitant neutropenia are at high risk of developing invasive fungal infections (IFI) that are associated with high morbidity and mortality. As these patients typically have severe thrombocytopenia, direct diagnostic sampling with invasive procedures is often not possible due to the high peri-interventional risk. Therefore, the presumptive diagnosis of IFI is primarily based on compatible lung findings on computed tomography and serologic detection of fungal cell wall components, which, however, have limited sensitivity and specificity.

With the present study, the investigators aim to determine a set of specific volatile biomarkers in leukemia patients with proven or probable IFI using secondary electrospray ionization high-resolution mass spectrometry (SESI-HRMS).

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.

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.
130

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

  • Switzerland
      • Zürich, Switzerland, 8091
        • Recruiting
        • University Hospital of Zürich
        • Contact:
        • Contact:
        • Contact:
          • Jeremy Deuel, PD Dr.
        • Contact:
          • Kevin Hofer, Dr.
        • Contact:
          • Noriane Sievi
        • Contact:
          • Egli Adrian, Prof. Dr.

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

Probability Sample

Study Population

Patients with acute leukemia that are undergoing chemotherapy at the Department of Medical Oncology and Haematology at the University Hospital Zurich

Description

Inclusion Criteria:

  • Diagnosis of acute leukemia
  • Planned chemotherapy with a duration of hospitalisation of 2 weeks or longer
  • Neutropenia (<500/µl) present at inclusion or planned chemotherapy with expected neutropenia (<500/µl) for more than 7 days

Exclusion Criteria:

  • Unable to follow instructions for breath analysis
  • Anatomic abnormalities precluding the use of a mouthpiece for breath analysis

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.
No invasive fungal disease
Patients, that retrospectively do not have evidence of IFI
Diagnostic test: Secondary electrospray ionization high-resolution mass spectrometry (SESI-HRMS)
Identify volatile biomarkers of IFI by analyzing the breath metabolome of patients with proven or probable IFI according to the criteria outlined by EORTC/MSG and controls.
Other Names:
  • Low-dose CT
  • Blood sampling (serologic biomarkers, PCR)
  • Sputum analysis
Possible invasive fungal disease
Patients, that retrospectively have a possible IFI (according to EORTC guidelines). There is suspicion of IFI by clinical or radiological features, but no microbiological evidence of IFI.
Diagnostic test: Secondary electrospray ionization high-resolution mass spectrometry (SESI-HRMS)
Identify volatile biomarkers of IFI by analyzing the breath metabolome of patients with proven or probable IFI according to the criteria outlined by EORTC/MSG and controls.
Other Names:
  • Low-dose CT
  • Blood sampling (serologic biomarkers, PCR)
  • Sputum analysis
Probable invasive fungal disease
Patients, that retrospectively have a probable IFI (according to EORTC guidelines). There is suspicion of IFI by clinical or radiological features, and indirect microbiological evidence of IFI.
Diagnostic test: Secondary electrospray ionization high-resolution mass spectrometry (SESI-HRMS)
Identify volatile biomarkers of IFI by analyzing the breath metabolome of patients with proven or probable IFI according to the criteria outlined by EORTC/MSG and controls.
Other Names:
  • Low-dose CT
  • Blood sampling (serologic biomarkers, PCR)
  • Sputum analysis
Proven invasive fungal disease
Patients, that retrospectively have a proven IFI (according to EORTC guidelines). There is histological (angioinvasive growth of a fungus) or definitive microbiological evidence of IFI, e.g. evidence of a fungus from a sterile tissue.
Diagnostic test: Secondary electrospray ionization high-resolution mass spectrometry (SESI-HRMS)
Identify volatile biomarkers of IFI by analyzing the breath metabolome of patients with proven or probable IFI according to the criteria outlined by EORTC/MSG and controls.
Other Names:
  • Low-dose CT
  • Blood sampling (serologic biomarkers, PCR)
  • Sputum analysis

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
Novel biomarker (m/z value) for IFI by SESI-HRMS
Time Frame: through study completion, on average after 3 weeks
Feature in Mass Spectrometry
through study completion, on average after 3 weeks

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
Specificity and sensitivity of this novel biomarker
Time Frame: through study completion, on average after 3 weeks
Description of Accuracy and Precision of this novel biomarker
through study completion, on average after 3 weeks
Anticipation of IFI
Time Frame: through study completion, on average after 3 weeks
Timepoint of first detection in relation to first clinical symptoms of IFI
through study completion, on average after 3 weeks

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.
University of Zurich

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: Jeremy Deuel, PD Dr., University of Zurich

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.
August 19, 2024

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 31, 2027

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 31, 2027

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).
July 27, 2024

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.
August 2, 2024

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.
August 5, 2024

Study Record Updates

Last Update Posted (Actual)

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.
April 10, 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.
April 9, 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.
April 1, 2025

More Information

Terms related to this study

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.
  • SNCTP000005947

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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