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
1997
The effect of intravascular blood transfusion on the flow velocity waveform of the portal venous system of the anemic fetus
d'Ancona R, Rahman F, Ozcan T, Copel J, Mari G. The effect of intravascular blood transfusion on the flow velocity waveform of the portal venous system of the anemic fetus. Ultrasound In Obstetrics And Gynecology 1997, 10: 333-337. PMID: 9444047, DOI: 10.1046/j.1469-0705.1997.10050333.x.Peer-Reviewed Original ResearchConceptsFlow velocity waveformsPortal venous systemAnemic fetusesVelocity waveformsPortal hypertensionIntravascular transfusionPortal veinVenous systemNormal fetusesIntravascular blood transfusionNon-pulsatile flowBlood transfusionRhesus alloimmunizationGestational agePulsatile patternTransfusionFetusesPresence of pulsatilityHypertensionIncreased numberCardiac cyclePulsatileVeinAlloimmunizationUtero
1996
Adrenal artery velocity waveforms in the appropriate and small‐for‐gestational‐age fetus
Mari G, Uerpairojkit B, Abuhamad A, Copel J. Adrenal artery velocity waveforms in the appropriate and small‐for‐gestational‐age fetus. Ultrasound In Obstetrics And Gynecology 1996, 8: 82-86. PMID: 8883308, DOI: 10.1046/j.1469-0705.1996.08020082.x.Peer-Reviewed Original ResearchConceptsGestational age fetusesArtery pulsatility indexFlow velocity waveformsPulsatility indexVelocity waveformsAdrenal arteryFetal heart rate decelerationsHeart rate decelerationsPreterm deliveryCesarean sectionGestational ageDoppler ultrasonographyAdrenal glandBlood flowHigh incidenceNormal fetusesFetusesRate decelerationConfidence intervalsSuccess rateArteryUltrasonographyGestationIncidence
1995
Abdominal venous system in the normal fetus.
Mari G, Uerpairojkit B, Copel J. Abdominal venous system in the normal fetus. Obstetrics And Gynecology 1995, 86: 729-33. PMID: 7566838, DOI: 10.1016/0029-7844(95)00264-r.Peer-Reviewed Original ResearchConceptsFlow velocity waveformsInferior vena cavaAbdominal venous systemUmbilical sinusNormal fetusesVena cavaPortal veinVenous systemVelocity waveformsDuctus venosusSplenic veinHepatic veinUmbilical veinCommon iliac veinLeft hepatic veinAdrenal veinWeeks' gestationRenal veinIliac veinAnterior divisionPosterior divisionMonophasic patternFetusesCavaBiphasic patternUmbilical 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 NotesConceptsUmbilical 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 vesselsGestationPregnancyArteryFetusesBlood flow velocity waveforms of the abdominal arteries in appropriate‐ and small‐for‐gestational‐age fetuses
Mari G, Abuhamad A, Uerpairojkit B, Martinez E, Copel J. Blood flow velocity waveforms of the abdominal arteries in appropriate‐ and small‐for‐gestational‐age fetuses. Ultrasound In Obstetrics And Gynecology 1995, 6: 15-18. PMID: 8528795, DOI: 10.1046/j.1469-0705.1995.06010015.x.Peer-Reviewed Original ResearchConceptsGestational age fetusesPulsatility index valuesSuperior mesenteric arteryFlow velocity waveformsPulsatility indexSplenic arteryHepatic arteryMesenteric arteryRenal arteryVelocity waveformsAbdominal arteriesLower pulsatility index valuesSuperior mesenteric artery levelColor flow Doppler ultrasonographyBlood flow velocity waveformsHigher pulsatility indexLow pulsatility indexLow vascular resistanceSuccessful insonationArtery levelVascular resistanceDoppler ultrasonographyArterial waveformBlood flowNormal fetuses
1994
Color Doppler flow patterns and flow velocity waveforms of the intraplacental fetal circulation in growth-retarded fetuses
Rotmensch S, Liberati M, Luo J, Kliman H, Gollin Y, Bellati U, Hobbins J, Copel J. Color Doppler flow patterns and flow velocity waveforms of the intraplacental fetal circulation in growth-retarded fetuses. American Journal Of Obstetrics And Gynecology 1994, 171: 1257-1264. PMID: 7977530, DOI: 10.1016/0002-9378(94)90143-0.Peer-Reviewed Original ResearchConceptsIntrauterine growth retardationFlow velocity waveformsUmbilical artery flow velocity waveformsColor Doppler flow signalsColor Doppler flow patternsDoppler flow signalsDoppler flow patternsVillous arteriesColor Doppler flowGrowth retardationVelocity waveformsFetal distressDoppler flowAbnormal umbilical artery flow velocity waveformsReversed end-diastolic flowDoppler flow velocity waveformsFlow signalsMedian Apgar scoresEnd-diastolic flowGrowth-retarded fetusesCross-sectional studyPulsed-wave DopplerApgar scoreColor Doppler flow imagesNormal pregnancy
1989
Pulsed Doppler flow-velocity waveforms in the prediction of fetal hematocrit of the severely isoimmunized pregnancy
Copel J, Grannum P, Green J, Belanger K, Hobbins J. Pulsed Doppler flow-velocity waveforms in the prediction of fetal hematocrit of the severely isoimmunized pregnancy. American Journal Of Obstetrics And Gynecology 1989, 161: 341-344. PMID: 2504040, DOI: 10.1016/0002-9378(89)90516-4.Peer-Reviewed Original Research
1988
Pulsed Doppler flow-velocity waveforms before and after intrauterine intravascular transfusion for severe erythroblastosis fetalis
Copel J, Grannum P, Belanger K, Green J, Hobbins J. Pulsed Doppler flow-velocity waveforms before and after intrauterine intravascular transfusion for severe erythroblastosis fetalis. American Journal Of Obstetrics And Gynecology 1988, 158: 768-774. PMID: 2966585, DOI: 10.1016/0002-9378(88)90070-1.Peer-Reviewed Original ResearchConceptsLate transfusionDoppler flow velocity waveformsIntrauterine intravascular transfusionFlow velocity waveformsSevere erythroblastosis fetalisFirst transfusionIntrauterine transfusionSubsequent transfusionsErythroblastosis fetalisIntravascular transfusionIsoimmunized pregnanciesDoppler studiesMaternal circulationDoppler ultrasoundTransfusionNormal fetusesHematocrit changesLack of changeHematocritDoppler parametersFetusesRapid volumeHydropsPregnancyFetalis