MRA and ABR as Early Predictors of Bilirubin-Induced Neurologic Dysfunction in Full-term Jaundiced Neonates
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ClinicalTrials.gov Identifier: NCT06018012 |
Recruitment Status :
Completed
First Posted : August 30, 2023
Last Update Posted : September 1, 2023
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Condition or disease | Intervention/treatment |
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Neonatal Hyperbilirubinemia | Device: MRS and ABR |
Neonatal jaundice is a prevalent condition. It's typically a harmless phase that occurs as the body adjusts to bilirubin levels after birth, representing a balance between its production and elimination. When there's an increase in bilirubin production and a decrease in elimination, infants become at risk for dangerous hyperbilirubinemia, potentially leading to bilirubin encephalopathy.
The range of neurological issues caused by excessive bilirubin is referred to as bilirubin-induced neurologic dysfunction. Detecting this condition early is crucial to prevent irreversible brain damage. Some of the neurological effects include gliosis, demyelination, and interference with glutamate uptake by astrocytes in the basal ganglia. Magnetic resonance spectroscopy (MRS) is an advanced imaging technique that holds promise for identifying these metabolic changes and aiding in the diagnosis and evaluation of neonates with hyperbilirubinemia.
Bilirubin neurotoxicity particularly affects the auditory system, starting with the brainstem cochlear nuclei, followed by the auditory nerve. This damage can occur even without the classic signs of bilirubin encephalopathy and is known as auditory neuropathy spectrum disorder (ANSD). ANSD is characterized by abnormal auditory neural function, while cochlear microphonics and otoacoustic emissions remain normal.
The impact on hearing can vary from subtle issues in sound processing to complete deafness. Abnormal results in auditory brainstem response (ABR) tests can indicate the presence of acute bilirubin encephalopathy (ABE), serving as the most common and earliest sign of ABE.
Study Type : | Observational |
Actual Enrollment : | 76 participants |
Observational Model: | Cohort |
Time Perspective: | Retrospective |
Official Title: | Magnetic Resonance Spectroscopy and Auditory Brain- Stem Response Audiometry as Early Predictors of Bilirubin-Induced Neurologic Dysfunction in Full-term Jaundiced Neonates |
Actual Study Start Date : | March 1, 2019 |
Actual Primary Completion Date : | March 1, 2021 |
Actual Study Completion Date : | April 1, 2021 |
Group/Cohort | Intervention/treatment |
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1 or acute bilirubin encephalopathy
Group (1): included 26 cases with BIND or acute bilirubin encephalopathy (ABE).
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Device: MRS and ABR
Magnetic Resonance Spectroscopy and Auditory Brain- stem Response Audiometry |
2 or neonatal hyperbilirubinemia
Group (2): included 30 cases with neonatal hyperbilirubinemia on
|
Device: MRS and ABR
Magnetic Resonance Spectroscopy and Auditory Brain- stem Response Audiometry |
Control
control group: 20 healthy, age-matched neonates
|
Device: MRS and ABR
Magnetic Resonance Spectroscopy and Auditory Brain- stem Response Audiometry |
- Early detection of neurological abnormalities using MRS metabolic ratios in high-risk neonates without oblivious clinical signs [ Time Frame: 2 years ]Early detection of neurological abnormalities in high-risk neonates, without oblivious clinical signs, chemically by using MRS metabolic ratio ( low NAA/Cr, NAA/Cho ratios, and high Lac/Cr ratio).
- Early detection of neurological abnormalities using ABR parameters in high-risk neonates without oblivious clinical signs [ Time Frame: 2 years ]Early detection of neurological abnormalities in high-risk neonates, without oblivious clinical signs, functionally through ABR parameters ( prolonged wave III peak latency, wave V peak latency, I-III interpeak interval, and I-V interpeak interval )
- Bilirubin level and auditory abnormality [ Time Frame: 2 years ]Finding out the lowest level of total serum bilirubin at which auditory pathway abnormality was found, in comparison to age.
- Bilirubin level and MRS abnormality [ Time Frame: 2 years ]Finding out the lowest level of total serum bilirubin at which MRS abnormalities were found, in comparison to age.
- Discriminative capacity of MRS for acute bilirubin encephalopathy [ Time Frame: 2 years ]Determining the discriminative capacity of MRS metabolic ratios (NAA/Cr and NAA/Cho) for neonates with acute bilirubin encephalopathy and those without it with identification of the cutoff value those ratios at which acute bilirubin encephalopathy is present.
- Discriminative capacity of ABR for acute bilirubin encephalopathy [ Time Frame: 2 years ]Determining the discriminative capacity of ABR wave latencies and interpeak intervals abnormalities for neonates with acute bilirubin encephalopathy and those without it with identification of the cutoff value those latencies and intervals at which acute bilirubin encephalopathy is present.
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Ages Eligible for Study: | 1 Day to 28 Days (Child) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | Yes |
Sampling Method: | Probability Sample |
Inclusion Criteria:
- This study included term, appropriate for gestational age (AGA) neonates with pathological unconjugated hyperbilirubinemia who were candidates for intervention (Intensive phototherapy versus Exchange transfusion) using the American Academy of Pediatrics guidelines; 2004.
Exclusion Criteria:
- Preterm neonates (less than 37 weeks).
- Clinically moderate and severe acute bilirubin encephalopathy according to modified Bilirubin-induced neurologic dysfunction (BIND-M) score.
- Neonates born with birth asphyxia and/or poor Apgar score.
- Neonates with sepsis including CNS infection.
- Neonates with family history of childhood hearing loss.
- Congenital infection.
- Chromosomal abnormalities.
- Congenital ear anomalies associated with hearing loss or brain abnormalities including craniofacial anomalies.
- Patients who were receiving ototoxic drugs as aminoglycosides.
- Conjugated hyperbilirubinemia.
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT06018012
Egypt | |
faculty of medicine,Tanta University | |
Tanta, Q2x2+cp Tanta 2, Egypt, 31527 |
Responsible Party: | Lamiaa Khaled Zidan, Assistant lecturer, Tanta University |
ClinicalTrials.gov Identifier: | NCT06018012 |
Other Study ID Numbers: |
MRS& ABR in jaundiced neonates |
First Posted: | August 30, 2023 Key Record Dates |
Last Update Posted: | September 1, 2023 |
Last Verified: | August 2023 |
Studies a U.S. FDA-regulated Drug Product: | No |
Studies a U.S. FDA-regulated Device Product: | No |
Neurologic Manifestations Hyperbilirubinemia, Neonatal Hyperbilirubinemia |
Pathologic Processes Infant, Newborn, Diseases Nervous System Diseases |