Starčević, Mirta
(2012)
Rani neurološki ishod novorođenčadi s intrauterinim zastojem u rastu.
PhD thesis, Sveučilište u Zagrebu.
Abstract
Objective: intrauterine growth restriction (IUGR) is considered as a risk factor for
neurodevelopmental disorders and unfavorable long-term outcome.
Aim of the study: to evaluate predictive validity of Doppler arterial indices and umbilical
cord acid-base status for early neurological outcome of the newborns with IUGR and to
establish reference values of Doppler parameters in the prediction of adverse neurological
outcome.
Methods: a prospective study included 60 IUGR neonates born between 37th and 40 th
week of gestation. Umbilical artery resistance index (URI), middle cerebral artery
resistance index (CRI), and cerebro-umbilical (C/U) ratio were followed during the
pregnancy. Umbilical cord samples (arterial and venous) were collected at birth for
analysis (pH, pO2, pCO2 ). Neurological outcome was evaluated during the first week of
life according to brain ultrasound findings and Amiel-Tison neurological assessment at
term (ATNAT).
Results: brain ultrasound lesions were found in 32 (53,37%) of the newborns, while 42
(70%) had non-optimal neurological status according to ATNAT. Generally, Doppler
indices had higher predictive validity for the early neurological outcome than umbilical
cord acid-base status. According to P value of the statistical analysis, the differences
between the normal and pathological results were more emphasized in ATNAT than brain
ultrasound findings. C/U ratio had the highest predictive validity for early neurological
disturbances, with the relative risk for adverse neurological outcome at reference validity
of 1,13.
Conclusions: Doppler indices are highly predictive in the risk assessment for adverse
neurological outcome among IUGR infants. C/U ratio was the best predictor of
neurological outcome. However, the non-optimal neurological outcome at everage values
of C/U ratios more than 1 confirmed that IUGR is connected with the possibility of
neurological seqelae even without fetal hemodinamics compromise. Sensitivity and
specificity of the ATNAT showed superiority in detecting early neurological disturbances
compared to brain ultrasound, so it has to be the basic method for the neurological
evaluation of the IUGR newborns, as well as the method of screening those in need for long-term follow up.
Abstract in Croatian
Uvod: intrauterini zastoj u rastu (IUGR) se smatra osobitim čimbenikom rizika za pojavu
neurorazvojnih odstupanja i nepovoljan dugoročni neurorazvojni ishod.
Ciljevi istraživanja: utvrditi prediktivnu vrijednost doplerskih parametara fetalne
cirkulacije, te parametara acido-baznog statusa iz krvi pupkovine za rani neurološki ishod
novorođenčadi s IUGR-om. Odrediti optimalne granične vrijednosti praćenih parametara
fetalne cirkulacije koji ukazuju na rizik neuroloških posljedica.
Ispitanici i postupci: prospektivnim istraživanjem obuhvaćeno je 60 djece sa zastojem u
rastu rođenih između navršenih 37 i 40 tjedana trudnoće. Praćeni doplerski parametri su
bili: indeks otpora pupčane arterije (URI), indeks otpora srednje moždane arterije (CRI) i
cerebo-umbilikalni (C/U) omjer. Na porođaju su uzeti uzorci krvi iz arterije i vene
pupkovine, te su određeni pH, pO2 i pCO2. Neurološki ishod je utvrđen tijekom prvog
tjedna po rođenju prema nalazu ultrazvuka mozga odnosno kliničkoj neurološkoj procjeni
po Amiel-Tison (ATNAT).
Rezultati: neurološko oštećenje po ultrazvučnom nalazu nađeno je u 32 djeteta (53,37%),
dok su neurološka odstupanja po ATNAT-u imala 42 djeteta (70%). Doplerski indeksi su
općenito imali veću prediktivnu vrijednost za rani neurološki ishod od parametara acidobaznog
statusa iz pupkovine. Pri tome je razlika između urednih i patoloških nalaza po
kriteriju P vrijednosti statističkih testova naglašenija kod ATNAT nalaza u odnosu na
ultrazvuk. Najviša prediktivna vrijednost je utvrđena za C/U omjer s relativnim rizikom
neurološkog oštećenja već kod vrijednosti od 1,13.
Zaključci: potvrđen je prognostički značaj praćenja fetalnih doplerskih parametara u
procjeni rizika ranih neuroloških odstupanja kod IUGR-a, pri čemu C/U omjer ima
prednost pred pojedinačnim parametrima. Pojava neuroloških odstupanja pri prosječnim
vrijednostima C/U omjera >1 potvrđuje da kod IUGR-a postoji rizik ranih neuroloških
posljedica i uz održane hemodinamske kompenzacijske mehanizme. Senzitivnost i
specifičnost ATNAT-a pokazala se superiornom ultrazvučnom pregledu u otkrivanju
neuroloških odstupanja, te zato treba biti osnovna metoda procjene ranog neurološkog
ishoda i probira djece s potrebom dugoročnog neurorazvojnog praćenja.
Item Type: |
Thesis
(PhD)
|
Mentors: |
Mentor |
---|
Salihagić-Kadić, Aida |
|
Departments: |
Izvan medicinskog fakulteta |
Depositing User: |
dr.med. Helena Markulin
|
University: |
Sveučilište u Zagrebu |
Institution: |
Medicinski fakultet |
Number of Pages: |
103 |
Status: |
Unpublished |
Creators: |
Creators | Email |
---|
Starčević, Mirta | UNSPECIFIED |
|
Date: |
10 October 2012 |
Date Deposited: |
28 May 2014 09:46 |
Last Modified: |
28 May 2014 09:46 |
Subjects: |
WQ Obstetrics > WQ 200-212 Pregnancy |
Related URLs: |
|
URI: |
http://medlib.mef.hr/id/eprint/2122 |
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