Fetal Haemoglobin and Cerebral and Peripheral Oxygenation.

NCT ID: NCT04802629

Last Updated: 2024-07-03

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Total Enrollment

50 participants

Study Classification

OBSERVATIONAL

Study Start Date

2020-06-08

Study Completion Date

2024-03-22

Brief Summary

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The aim of this study is to investigate the relationship between cerebral and peripheral oxygenation and oxygen extraction, as measured by NIRS (near-infrared spectroscopy ), and the FHbF (fraction of fetal hemoglobin) and absolute HbF (fetal hemoglobin) concentration in postnatal conditions in term and preterm neonates.

Detailed Description

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During gestation the main fetal oxygen carrier is fetal hemoglobin (HbF). HbF exhibits a significantly higher affinity for oxygen when compared to adult hemoglobin (HbA), which makes it more suitable for oxygen extraction at the lower partial oxygen pressures in utero. Although the regulation of HbF expression is determined developmentally, recent studies report a respectable variation in the fraction of HbF in neonates.

Such data suggest that the differences in HbF expression could affect end-tissue oxygenation in neonates.

The methodology for measuring oxygen saturation and extraction in cerebral and peripheral tissues of neonates using the near-infrared spectroscopy (NIRS) has been well practiced in our study group. However, the method has not yet been used to investigate whether the fraction of fetal hemoglobin (FHbF) plays a significant role in cerebral and peripheral oxygenation in neonates.

The aim of this study is to investigate the relationship between cerebral and peripheral oxygenation and oxygen extraction, as measured by NIRS, and the FHbF and absolute HbF concentration in postnatal conditions in term and preterm neonates.

Conditions

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Preterm Birth Oxygen Toxicity Fetal Hemoglobin

Study Design

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Observational Model Type

OTHER

Study Time Perspective

PROSPECTIVE

Study Groups

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Term neonates

≥ 37+0 weeks of gestation

Near-infrared spectroscopy

Intervention Type DEVICE

For NIRS measurements the t-NIRS 1 and NIRO 200 NX (Hamamatsu, Japan) will be used. A cerebral sensor will be placed and fixed with a CPAP (Continuous Positive Airway Pressure) cap on the left forehead and a peripheral sensor on the right forearm. Duration of measurement will be two hours.

Preterm neonates

≤ 36+6 weeks of gestation

Near-infrared spectroscopy

Intervention Type DEVICE

For NIRS measurements the t-NIRS 1 and NIRO 200 NX (Hamamatsu, Japan) will be used. A cerebral sensor will be placed and fixed with a CPAP (Continuous Positive Airway Pressure) cap on the left forehead and a peripheral sensor on the right forearm. Duration of measurement will be two hours.

Interventions

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Near-infrared spectroscopy

For NIRS measurements the t-NIRS 1 and NIRO 200 NX (Hamamatsu, Japan) will be used. A cerebral sensor will be placed and fixed with a CPAP (Continuous Positive Airway Pressure) cap on the left forehead and a peripheral sensor on the right forearm. Duration of measurement will be two hours.

Intervention Type DEVICE

Eligibility Criteria

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Inclusion Criteria

* Term and preterm neonates admitted to the neonatal intensive care unit (NICU)
* Decision to conduct full life support
* Written informed consent

Exclusion Criteria

* No decision to conduct full life support
* No written informed consent
* Congenital malformations
* Family history of haemoglobinopathies (e.g. sickle cell anaemia, thalassaemia)
Minimum Eligible Age

2 Days

Maximum Eligible Age

3 Weeks

Eligible Sex

ALL

Accepts Healthy Volunteers

Yes

Sponsors

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Medical University of Graz

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Principal Investigators

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Gerhard Pichler, Prof

Role: PRINCIPAL_INVESTIGATOR

Medical University of Graz

Locations

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Department of Pediatrics, Division of Neonatology, Medical University of Graz

Graz, Styria, Austria

Site Status

Countries

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Austria

Other Identifiers

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HbF Version 1.3

Identifier Type: -

Identifier Source: org_study_id

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