2014
Doppler abnormalities in monochorionic diamniotic twin pregnancies with discordant growth
Zuckerwise L, Nayeri U, Abdel-Razeq S, Copel J, Bahtiyar M. Doppler abnormalities in monochorionic diamniotic twin pregnancies with discordant growth. Journal Of Perinatology 2014, 35: 387-389. PMID: 25521562, DOI: 10.1038/jp.2014.223.Peer-Reviewed Original ResearchConceptsDoppler flow velocity waveformsFlow velocity waveformsDiscordant growthVelocity waveformsTwin gestationsSmall fetusesAbnormal umbilical artery Doppler flow velocity waveformsUmbilical artery Doppler flow velocity waveformsMonochorionic diamniotic twin gestationsMonochorionic diamniotic twin pregnanciesNeonatal intensive care unitDiamniotic twin gestationsMCDA twin pairsDiamniotic twin pregnanciesEnd-diastolic flowLow Apgar scoreBirth weight discordanceDiscordant fetal growthIntensive care unitTwin transfusion syndromeDoppler velocity waveformsT-testElectronic medical recordsTwin pairsStudent's t-test
1999
Assessment of Doppler velocimetry of the fetal umbilical artery by multigate spectral Doppler scanning and traditional pulsed Doppler ultrasonography plus color flow mapping.
Prapas N, Mari G, Liang R, Copel J. Assessment of Doppler velocimetry of the fetal umbilical artery by multigate spectral Doppler scanning and traditional pulsed Doppler ultrasonography plus color flow mapping. Journal Of Ultrasound In Medicine 1999, 18: 831-835. PMID: 10591448, DOI: 10.7863/jum.1999.18.12.831.Peer-Reviewed Original ResearchThe Doppler cerebroplacental ratio and perinatal outcome in intrauterine growth restriction
Bahado-Singh R, Kovanci E, Jeffres A, Oz U, Deren O, Copel J, Mari G. The Doppler cerebroplacental ratio and perinatal outcome in intrauterine growth restriction. American Journal Of Obstetrics And Gynecology 1999, 180: 750-756. PMID: 10076158, DOI: 10.1016/s0002-9378(99)70283-8.Peer-Reviewed Original ResearchConceptsIntrauterine growth restrictionDoppler cerebroplacental ratioPerinatal outcomesCerebroplacental ratioBirth weightGrowth restrictionDoppler examinationUmbilical artery pulsatility index valuesStepwise logistic regression analysisAbnormal cerebroplacental ratioBrain-sparing effectLast Doppler examinationUmbilical artery DopplerUmbilical artery velocimetryPulsatility index valuesReceiver operator curve characteristicsReceiver operator characteristic curveLogistic regression analysisRegression analysisArtery DopplerPerinatal morbidityPerinatal complicationsWeeks' gestationNormal medianPerinatal problems
1998
Arterial and venous Doppler velocimetry in the severely growth‐restricted fetus and associations with adverse perinatal outcome
Ozcan T, Sbracia M, d'Ancona R, Copel J, Mari G. Arterial and venous Doppler velocimetry in the severely growth‐restricted fetus and associations with adverse perinatal outcome. Ultrasound In Obstetrics And Gynecology 1998, 12: 39-44. PMID: 9697283, DOI: 10.1046/j.1469-0705.1998.12010039.x.Peer-Reviewed Original ResearchMeSH KeywordsBlood Flow VelocityCerebral ArteriesFemaleFetal Growth RetardationFetusHumansInfant, NewbornPregnancyPregnancy OutcomePrognosisPulsatile FlowReference ValuesSensitivity and SpecificitySignal Processing, Computer-AssistedSurvival RateUltrasonography, Doppler, ColorUltrasonography, PrenatalUmbilical ArteriesUmbilical VeinsConceptsAdverse outcome parametersAdverse perinatal outcomesGrowth-restricted fetusesOutcome parametersApgar scorePerinatal outcomesDuctus venosusPerinatal deathNeonatal intensive care unitSevere intrauterine growth restrictionDuctus venosus Doppler velocimetryAbnormal Doppler velocimetryVenous Doppler velocimetryVenous Doppler waveformsRespiratory distress syndromeMiddle cerebral arteryRetinopathy of prematurityIntensive care unitIntrauterine growth restrictionDays of lifeOnly significant parameterApgar valuesPeriventricular leukomalaciaDistress syndromeFetal demise
1995
Umbilical artery flow velocity waveforms in monoamniotic twins with cord entanglement.
Abuhamad A, Mari G, Copel J, Cantwell C, Evans A. Umbilical artery flow velocity waveforms in monoamniotic twins with cord entanglement. Obstetrics And Gynecology 1995, 86: 674-7. PMID: 7675410, DOI: 10.1016/0029-7844(95)00210-i.Peer-Reviewed Case Reports and Technical NotesMeSH KeywordsAdultAmnionBlood Flow VelocityFemaleHumansPregnancyTwinsUltrasonography, PrenatalUmbilical ArteriesUmbilical CordConceptsUmbilical artery velocity waveformsFlow velocity waveformsCord entanglementMonoamniotic twinsVelocity waveformsUltrasonographic evidenceWeeks' gestationUmbilical artery flow velocity waveformsDoppler flow velocity waveformsMiddle cerebral arteryFetal-placental circulationTwin membersUmbilical cord entanglementAntepartum managementDoppler findingsCerebral arteryHemodynamic alterationsAntepartum periodUmbilical vesselsGestationPregnancyArteryFetusesSingle umbilical artery: Does it matter which artery is missing?
Abuhamad A, Shaffer W, Mari G, Copel J, Hobbins J, Evans A. Single umbilical artery: Does it matter which artery is missing? American Journal Of Obstetrics And Gynecology 1995, 173: 728-732. PMID: 7573234, DOI: 10.1016/0002-9378(95)90331-3.Peer-Reviewed Original ResearchConceptsSingle umbilical arteryGestational age fetusesUmbilical arteryLeft arteryCongenital anomaliesRight arteryIsolated single umbilical arteryComplex fetal anomaliesLeft umbilical arteryComplex congenital anomaliesProspective studyIsolated findingFetal anomaliesArteryCytogenetic abnormalitiesComplex anomaliesFetusesPregnancyPrevious reportsAbsenceAbnormalitiesIncidenceSonograms
1991
Can umbilical artery pulsatility index predict the outcome of fetuses with structural heart disease?
Copel J, Hobbins J, Kleinman C. Can umbilical artery pulsatility index predict the outcome of fetuses with structural heart disease? Journal Of Ultrasound In Medicine 1991, 10: 323-326. PMID: 1895374, DOI: 10.7863/jum.1991.10.6.323.Peer-Reviewed Original ResearchConceptsCongenital heart diseaseElevated pulsatility indexPulsatility indexHeart diseaseUmbilical artery PI valuesUmbilical artery pulsatility indexUmbilical artery Doppler waveformsNormal PI valuesArtery pulsatility indexOutcome of fetusesStructural heart diseaseEnd-diastolic velocityWeeks' gestationFatal anomalyCHD fetusesAnomalous fetusesDoppler waveformsFatal diseaseFetusesNormal populationDiseasePI valuesGestationNormal chromosomesLesions
1990
Does the umbilical artery systolic/diastolic ratio reflect flow or acidosis? An umbilical artery Doppler study of fetal sheep
Copel J, Schlafer D, Wentworth R, Belanger K, Kreitzer L, Hobbins J, Nathanielsz P. Does the umbilical artery systolic/diastolic ratio reflect flow or acidosis? An umbilical artery Doppler study of fetal sheep. American Journal Of Obstetrics And Gynecology 1990, 163: 751-756. PMID: 2206067, DOI: 10.1016/0002-9378(90)91062-h.Peer-Reviewed Original ResearchConceptsSystolic/diastolic ratioUmbilical artery systolic/diastolic ratioDiastolic ratioFetal sheepNormal systolic/diastolic ratioUmbilical artery Doppler studiesArterial blood gas levelsBlood gas levelsAcid-base statusArtery embolizationFetal oxygenationPlacental perfusionMaternal anesthesiaPlacental embolizationAcute modelDoppler studiesThird injectionUmbilical flowFourth injectionSubsequent embolizationDays gestationFirst injectionSecond injectionEmbolizationGreater magnitude change