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Common Neonatal Procedures Could Affect the aEEG in <30 Weeks of Gestational Age Preterms (ELECTROPREM)

The recruitment status of this study is unknown. The completion date has passed and the status has not been verified in more than two years.
Verified July 2008 by Pontificia Universidad Catolica de Chile.
Recruitment status was:  Not yet recruiting
Information provided by:
Pontificia Universidad Catolica de Chile Identifier:
First received: July 23, 2008
Last updated: August 13, 2008
Last verified: July 2008

July 23, 2008
August 13, 2008
August 2008
August 2009   (Final data collection date for primary outcome measure)
aEEG voltage amplitude changes after procedures [ Time Frame: right after procedure ]
Same as current
Complete list of historical versions of study NCT00722033 on Archive Site
aEEG amplitude voltage changes between 3 administration protocols of Indomethacin [ Time Frame: right after procedure ]
Same as current
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Common Neonatal Procedures Could Affect the aEEG in <30 Weeks of Gestational Age Preterms
Effect of Common Neonatal Procedures Over the Amplitude- Integrated Electroencephalography Register in <30 Weeks Preterms.
Very low birth weight infants has increased dramatically their survival. Survival without neurologic disturbance varies a lot between centers.There is evidence that fluctuations in cerebral blood flow influences the appearance of intraventricular hemorrhage and itself implies a detrimental neurologic developing.The electroencephalography is the result of electric base membrane activity on rest, and it's influenced by the blood flow either. The Amplitude-integrated electroencephalography is a novel tool, that is capable to be continuously used at the patient bed and is easily to be read by the trained clinician.The hypothesis is that common procedures as Surfactant instilation, Indomethacin and Aminophyline infusion as the appearance of apneas alters the aEEG register. It is a prospective study that tries to recruit 10 < 30 weeks of gestational age with aprofen consent to monitorize the aEEG since birth to the seventh day of live.

The survival of extreme premature babies ( < 1000 grams) has improved in the last years. The neonatal networks have realized of these results and of the interventions associated with better forecast in the managing of certain punctual problems. Also they have informed that differences exist in the results obtained among the centers credited for the managing of this type of patients. One of the challenges of the current Neonatology is the survival without sequels.

It is of principal worry the neurological sequels in the extreme premature babies. These can go from severe alterations up to minimal disorders. The managing of the critical patient includes the strict and continuous monitoring of the vital signs. The cerebral function is of evaluation limited in the acute period of these patients. The electroencephalography is the expression of the membrane potential in rest neuronal. One has seen that the changes in cerebral flow affect the electrical sign emitted by this one. There have been reported that some conditions that in the neonatal period are associated with alterations of cerebral flow. This way there is described, that the application of surfactant is associated with fluctuations of the cerebral flow, the arterial unbalanced ductus, Indomethacin's injection in less than 30 minutes, episodes of severe hypoxemia , Methylxanthines's injection,etc.

For some years there is used the Monitoring of Amplitude-Integrated Electroencephalography to term newborn.It corresponds to the Electroencephalography sign obtained in C3 and C4 location of the standard electroencephalography, amplification of the sign, filtered to 2-15Hz, submitted to a semilogarithmic compression of the extent rectified by a constant of time of 0,5 seconds and compressed. This gives origin to different patterns, possible to interpret for the clinician in real time. The use of this tool in premature babies is still experimental.

It is tried to evaluate if common procedures theorically associated with alteration of the cerebral flow, in extreme premature babies affect the Amplitude- Integrated Electroencephalography record. It will measure up if changes happen to relation to the application of Surfactant, Indomethacin in 3 rate of application and Aminophyline's infusion. The effect of desaturation will measure up, bradycardias and apneas in the extent of voltage.

For this they will be monitored in continuous form from the birth to 10 premature babies <30 weeks of gestational age for 7 days, previous obtaining of informed consent. Protocols will be applied:quality of sign and specifics according to the raised aims. The analysis will be done by means of programs EEG Viewer and Chart Analyzer.The analysis of the bosses of aEEG and of his variations will be realized manually, applying the Burdjalov and Spitzer score. The periods before, during and after the administration of Surfactant, Indomethacin and Aminophyline were selected . In case of apneas, bradycardias and desaturation it will be compared 1 minute before with the properly such episode. These episodes will be transfer to an Excel schedule for his numerical analysis. This will allow the obtaining of averages and standard diversion of the extent of voltage of every episode and it's going to be calculated if there is any difference before and after each episode. The same is going to be done for Surfactant (5 minutes before and after), Indometacin(30 minutes before and during the 3 rates of infusion) and Aminophyline(15 minutes before and after) The level of statistics significance for all the test will be p < 0,05.

One expects to achieve ideal quality of sign > 75 % of the registered time. One tries to evaluate 12 Surfactant applications, 35 of Indomethacin, 60 of Aminophyline and 100 cardiorespiratory events. One expects to find differences in the Extent of voltage in relation to desaturations, bradycardias and apneas.

Phase 2
Allocation: Non-Randomized
Intervention Model: Single Group Assignment
Masking: Open Label
Primary Purpose: Diagnostic
  • Regional Blood Flow
  • Premature Birth
  • Electroencephalography
Drug: 3 protocols of Indomethacin administration
Indomethacin will consecutive be infused in 30, 60 and 120 minutes in each patient who requires it.
Other Name: indomethacin
< 30 weeks of gestation
Intervention: Drug: 3 protocols of Indomethacin administration

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
Unknown status
December 2009
August 2009   (Final data collection date for primary outcome measure)

Inclusion Criteria:

  • < 30 weeks of gestational age
  • Consent inform approved

Exclusion Criteria:

  • Known mayor malformation
Sexes Eligible for Study: All
up to 30 Minutes   (Child)
Contact information is only displayed when the study is recruiting subjects
Not Provided
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Paulina Toso/MD, Pontificia Universidad Catolica
Pontificia Universidad Catolica de Chile
Not Provided
Not Provided
Pontificia Universidad Catolica de Chile
July 2008

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP