1997
Repeated Doses of the Perfluorocarbon FC-100 Improve Lung Function of Preterm Lambs
Moya F, Llanos A, Ríos A, Riquelme R, Moraga F, Rubio L, Salvo H, Jacobs H. Repeated Doses of the Perfluorocarbon FC-100 Improve Lung Function of Preterm Lambs. Pediatric Research 1997, 42: 893-898. PMID: 9396575, DOI: 10.1203/00006450-199712000-00028.Peer-Reviewed Original ResearchConceptsLung functionPreterm lambsInitial doseIntratracheal administrationFC-100Administration of ExosurfSurfactant-deficient animalsSynthetic surfactant ExosurfArterial blood pressureDynamic lung compliancePreterm neonatesBlood pressureLung complianceSingle doseArterial PO2Arterial PCO2Surfactant deficiencyHeart rateAdditional doseExosurfStudy periodDoseAdministrationDosesSimilar changes
1990
Effect of artificial surfactant on pulmonary function in preterm and full-term lambs
Gladstone I, Ray A, Salafia C, Perez-Fontan J, Mercurio M, Jacobs H. Effect of artificial surfactant on pulmonary function in preterm and full-term lambs. Journal Of Applied Physiology 1990, 69: 465-472. PMID: 2121700, DOI: 10.1152/jappl.1990.69.2.465.Peer-Reviewed Original ResearchConceptsFunctional residual capacityFull-term lambsMean lung volumePreterm lambsLung volumeResidual capacityTest agentsFC-100Higher minimum surface tensionsRespiratory failureLung functionPulmonary functionLung expansionAlveolar washMinimum surface tensionDynamic complianceArtificial surfactantQualitative histologyOxygenationLambsAgentsGas exchangePretermComplianceHistology
1987
Thresholds for physiological effects of plasma catecholamines in fetal sheep
Padbury J, Ludlow J, Ervin M, Jacobs H, Humme J. Thresholds for physiological effects of plasma catecholamines in fetal sheep. American Journal Of Physiology 1987, 252: e530-e537. PMID: 3565562, DOI: 10.1152/ajpendo.1987.252.4.e530.Peer-Reviewed Original ResearchConceptsBlood pressurePlasma concentrationsFetal sheepPg/Plasma free fatty acidsDiastolic blood pressureSystolic blood pressurePlasma catecholamine levelsFull-term animalsInfusion of norepinephrineMinimum plasma concentrationDose-response curvePlasma catecholamine valuesInfused norepinephrineHigher peak responsesNeonatal adaptationCatecholamine levelsPlasma catecholaminesPreterm animalsFree fatty acidsGlucose levelsE concentrationsCatecholamine valuesNorepinephrineMarked increase
1986
Left ventricular performance and contractility before and after volume infusion: a comparative study of preterm and full-term newborn lambs.
Baylen B, Ogata H, Ikegami M, Jacobs H, Jobe A, Emmanouilides G. Left ventricular performance and contractility before and after volume infusion: a comparative study of preterm and full-term newborn lambs. Circulation 1986, 73: 1042-1049. PMID: 3754496, DOI: 10.1161/01.cir.73.5.1042.Peer-Reviewed Original ResearchConceptsFull-term lambsLeft ventricular performanceVolume infusionPreterm lambsVentricular performanceStroke workLeft ventricular peak dP/dtLeft ventricleVentricular peak dP/dtLeft ventricular end-diastolic volumeFull-term newborn lambsVentricular end-diastolic volumeLeft ventricular stroke workPeak dP/dtGreater stroke workPostnatal circulatory adaptationSystemic vascular resistanceVentricular stroke workFull-term animalsDays gestational ageEnd-diastolic volumeLeft ventricular pressureDP/dtVascular resistancePulmonary functionHemodynamic Effects of High Frequency Ventilation in Surfactant-Treated Preterm Lambs
Oguchi K, Baylen B, Ikegami M, Jacobs H, Berry D, Jobe A, Emmanouilides G. Hemodynamic Effects of High Frequency Ventilation in Surfactant-Treated Preterm Lambs. Neonatology 1986, 49: 21-28. PMID: 3753885, DOI: 10.1159/000242505.Peer-Reviewed Original ResearchConceptsHigh-frequency ventilationConventional ventilationHemodynamic effectsDuctus arteriosusPreterm lambsFrequency ventilationSame mean airway pressureLV end-diastolic volumeRight ductal shuntSurfactant-treated lambsMean airway pressureDeleterious hemodynamic effectsOrgan blood flowMin of ageEnd-diastolic volumeBlood gas valuesDays gestational ageLV stroke volumeBlood flow measurementsComparable ventilationDuctal shuntAirway pressureDuctal occlusionHemodynamic statusArterial pressure
1985
Normalization of Arterial Blood Gases after Treatment of Surfactant-Deficient Lambs with Tween 201–3
Jacobs H, Berry D, Duane G, Ikegami M, Jobe A, Jones S. Normalization of Arterial Blood Gases after Treatment of Surfactant-Deficient Lambs with Tween 201–3. American Journal Of Respiratory And Critical Care Medicine 1985, 132: 1313-8. PMID: 3935021, DOI: 10.1164/arrd.1985.132.6.1313.Peer-Reviewed Original ResearchConceptsPeak inspiratory pressurePulmonary surfactantAdequate ventilationMinimal surface tensionArterial blood gasesNormal lung functionMin of ageRespiratory failureLung functionLung complianceInspiratory pressureBlood gasesInfant ventilatorDays gestationAlveolar washControl animalsControl lambsPoor oxygenationSurfactant treatmentGas exchangeTreatmentVentilationLambsGestationVentilatorEffects of high-frequency and conventional ventilation on the premature lamb lung
Solimano A, Bryan C, Jobe A, Ikegami M, Jacobs H. Effects of high-frequency and conventional ventilation on the premature lamb lung. Journal Of Applied Physiology 1985, 59: 1571-1577. PMID: 3840801, DOI: 10.1152/jappl.1985.59.5.1571.Peer-Reviewed Original ResearchConceptsMean airway pressureConventional mechanical ventilationProtein leakPremature lamb lungsFetal lung fluidRespiratory distress syndromeDays gestational ageDegree of leakHigh-frequency oscillationsGroups of lambsAirway pressureCesarean sectionDistress syndromeGestational ageConventional ventilationMechanical ventilationPathological findingsLung diseaseBlood gasesImmature lungVentilator settingsEpithelial necrosisBlood gasLung sectionsTracer doseThe Contractility and Performance of the Preterm Left Ventricle before and after Early Patent Ductus Arteriosus Occlusion in Surfactant- Treated Lambs
Baylen B, Ogata H, Oguchi K, Ikegami M, Jacobs H, Jobe A, Emmanouilides G. The Contractility and Performance of the Preterm Left Ventricle before and after Early Patent Ductus Arteriosus Occlusion in Surfactant- Treated Lambs. Pediatric Research 1985, 19: 1053-1058. PMID: 3840585, DOI: 10.1203/00006450-198510000-00022.Peer-Reviewed Original ResearchConceptsPatent ductus arteriosusSystemic blood flowEnd-diastolic volumeBlood flowDuctal shuntingSystemic perfusionPreterm lambsDuctus arteriosusEffective systemic blood flowVentricle end-diastolic volumeEarly hemodynamic responseLeft ventricle outputLeft-right shuntPatent ductus arteriosus occlusionLeft ventricular outputCardiac output stateLeft ventricle end-diastolic volumeOrgan blood flowDuctus arteriosus occlusionBlood flow measurementsDuctal shuntDuctal occlusionHemodynamic profileEjection fractionVentricular outputDistribution of Pulmonary Blood Flow in Relation to Atelectasis in Premature Ventilated Lambs1–3
Berry D, Jobe A, Jacobs H, Ikegami M. Distribution of Pulmonary Blood Flow in Relation to Atelectasis in Premature Ventilated Lambs1–3. American Journal Of Respiratory And Critical Care Medicine 1985, 132: 500-3. PMID: 4037523, DOI: 10.1164/arrd.1985.132.3.500.Peer-Reviewed Original ResearchConceptsBlood flowAtelectatic regionsLung volumePulmonary blood flow distributionAtelectatic lung segmentsLower lobe bronchusRespiratory distress syndromePulmonary blood flowPieces of lungBlood flow distributionBronchial obstructionDistress syndromeLobe bronchusBalloon occlusionAtelectatic lungLung segmentsBalloon catheterPulmonary bloodAtelectasisLungBloodLambsPretermBronchusCatheterLung protein leaks in ventilated lambs: effects of gestational age
Jobe A, Jacobs H, Ikegami M, Berry D. Lung protein leaks in ventilated lambs: effects of gestational age. Journal Of Applied Physiology 1985, 58: 1246-1251. PMID: 3988678, DOI: 10.1152/jappl.1985.58.4.1246.Peer-Reviewed Original ResearchConceptsDays gestational ageGestational ageFull-term lambsGroups of lambsVentilated lambsLung tissueAlveolar washBlood gas valuesNatural sheep surfactantPremature lambsPreterm lambsPremature lungIntravascular injectionSheep surfactantLung proteinGas valuesPCO2 valuesAgeAlveoliAirwayLambsBidirectional fluxesTissueGroupAlbuminAccumulation of Alveolar Surfactant Following Delivery and Ventilation of Premature Lambs
Jacobs H, Jobe A, Ikegami M, Jones S. Accumulation of Alveolar Surfactant Following Delivery and Ventilation of Premature Lambs. Experimental Lung Research 1985, 8: 125-140. PMID: 3839748, DOI: 10.3109/01902148509057517.Peer-Reviewed Original ResearchConceptsAlveolar washTreatment doseAlveolar surfactantMean gestational ageArterial blood gasPeak inspiratory pressureMin of ageSurfactant pool sizeAlveolar surfactant accumulationPhosphatidylcholine specific activityCesarean sectionPremature lambsGestational agePremature lungInspiratory pressureIntratracheal administrationBlood gasTrace doseDilution techniqueDoseAgeAirwayPool sizeBirthAccumulation of surfactantClearance of Large Amounts of Natural Surfactants and Liposomes of Dipalmitoylphosphatidylcholine from the Lungs of Rabbits
Oguchi K, Ikegami M, Jacobs H, Jobe A. Clearance of Large Amounts of Natural Surfactants and Liposomes of Dipalmitoylphosphatidylcholine from the Lungs of Rabbits. Experimental Lung Research 1985, 9: 221-235. PMID: 3841050, DOI: 10.3109/01902148509057525.Peer-Reviewed Original ResearchConceptsTotal lungLung tissueRabbit surfactantAlveolar washSheep surfactantAlveolar surfactant pool sizeEndogenous surfactant metabolismEndogenous surfactant poolsSurfactant pool sizeDifferent surfactant preparationsNatural rabbit surfactantLungs of rabbitsNatural sheep surfactantIntratracheal administrationIntratracheal injectionLung phosphatidylcholineSurfactant poolQuantity of phosphatidylcholineSurfactant metabolismLungClearance rateSurfactant phosphatidylcholineTotal phosphatidylcholineMetabolic responseSurfactant preparations
1984
A protein from airways of premature lambs that inhibits surfactant function
Ikegami M, Jobe A, Jacobs H, Lam R. A protein from airways of premature lambs that inhibits surfactant function. Journal Of Applied Physiology 1984, 57: 1134-1142. PMID: 6209255, DOI: 10.1152/jappl.1984.57.4.1134.Peer-Reviewed Original ResearchLack of correlation of severity of lung disease with the phosphatidylcholine concentration in fetal lung fluid from premature lambs at 133-136 days gestational age.
Jobe A, Jacobs H, Ikegami M. Lack of correlation of severity of lung disease with the phosphatidylcholine concentration in fetal lung fluid from premature lambs at 133-136 days gestational age. Journal Of Developmental Physiology 1984, 6: 417-21. PMID: 6568247.Peer-Reviewed Original ResearchConceptsFetal lung fluidPeak inspiratory pressureDays gestational ageLung diseaseLung fluidPremature lambsGestational ageInspiratory pressureConcentration of phosphatidylcholinePhosphatidylcholine concentrationNarrow gestational age rangePhosphatidylcholine pool sizesGestational age rangeTime of deliveryLung compliance valuesMechanical ventilationAlveolar washTotal phosphatidylcholineDiseaseAge rangeSeverityLack of correlationAgeLambsCompliance valuesSurfactant and pulmonary blood flow distributions following treatment of premature lambs with natural surfactant.
Jobe A, Ikegami M, Jacobs H, Jones S. Surfactant and pulmonary blood flow distributions following treatment of premature lambs with natural surfactant. Journal Of Clinical Investigation 1984, 73: 848-856. PMID: 6546766, PMCID: PMC425089, DOI: 10.1172/jci111280.Peer-Reviewed Original ResearchConceptsPieces of lungBlood flow distributionPulmonary blood flow distributionLungs of lambsMechanical ventilationRight ductal shuntPulmonary blood flowConstant distending pressurePeriod of ventilationGroups of lambsDuctal shuntPremature lambsAtelectatic areasSurfactant instillationVentricular outputTracheal instillationDistending pressureBlood flowLungLung piecesVentilationInstillationBirthLambsNatural surfactant
1983
Permeability of premature lamb lungs to protein and the effect of surfactant on that permeability
Jobe A, Ikegami M, Jacobs H, Jones S, Conaway D. Permeability of premature lamb lungs to protein and the effect of surfactant on that permeability. Journal Of Applied Physiology 1983, 55: 169-176. PMID: 6554276, DOI: 10.1152/jappl.1983.55.1.169.Peer-Reviewed Original ResearchCardiovascular Effects of Surfactant Suspensions Given by Tracheal Instillation to Premature Lambs
Jobe A, Jacobs H, Ikegami M, Jones S. Cardiovascular Effects of Surfactant Suspensions Given by Tracheal Instillation to Premature Lambs. Pediatric Research 1983, 17: 444-448. PMID: 6553821, DOI: 10.1203/00006450-198306000-00002.Peer-Reviewed Original ResearchConceptsSurfactant instillationPremature lambsOnly ventilator settingPulmonary artery pressureDays gestational ageSurfactant treatmentArtery pressureCesarean sectionRespiratory supportCardiovascular effectsLung functionGestational ageCardiovascular statusInspiratory pressureRespiratory statusTransient deteriorationCardiac outputAortic pressureTracheal instillationVentilator settingsInfant ventilatorRegional bloodHeart rateInstillationBody weightSurfactant Pool Sizes and Severity of Respiratory Distress Syndrome in Prematurely Delivered Lambs1–3
Jobe A, Ikegami M, Jacobs H, Jones S. Surfactant Pool Sizes and Severity of Respiratory Distress Syndrome in Prematurely Delivered Lambs1–3. American Journal Of Respiratory And Critical Care Medicine 1983, 127: 751-5. PMID: 6552894, DOI: 10.1164/arrd.1983.127.6.751.Peer-Reviewed Original ResearchConceptsLung diseaseAlveolar washCompliant lungsMinimal surface tensionLow minimal surface tensionRespiratory distress syndromePeak inspiratory pressurePhosphatidylcholine pool sizesDays gestational ageSurfactant pool sizePremature lambsDistress syndromeGestational ageInspiratory pressureLung tissueRespiratory diseaseTidal volumeLung slicesSurfactant phosphatidylcholineTotal phosphatidylcholineDiseaseSeverityPool sizeRate of incorporationLungLeft ventricular performance and regional blood flows before and after ductus arteriosus occlusion in premature lambs treated with surfactant.
Baylen B, Ogata H, Ikegami M, Jacobs H, Jobe A, Emmanouilides G. Left ventricular performance and regional blood flows before and after ductus arteriosus occlusion in premature lambs treated with surfactant. Circulation 1983, 67: 837-843. PMID: 6687448, DOI: 10.1161/01.cir.67.4.837.Peer-Reviewed Original ResearchConceptsPatent ductus arteriosusSystemic blood flowBlood flowVentricular performanceLV end-diastolic pressureEarly pathologic manifestationsOvert LV dysfunctionRight PDA shuntEnd-diastolic pressureHours of lifeLeft ventricular performanceRadionuclide-labeled microspheresDuctus arteriosus occlusionRegional blood flowPDA shuntLV dysfunctionPremature lambsRight shuntDuctus arteriosusEjection fractionPreterm lambsHemodynamic consequencesCardiac outputLeft ventriculographyPathologic manifestationsSurfactant function in respiratory distress syndrome
Ikegami M, Jacobs H, Jobe A. Surfactant function in respiratory distress syndrome. The Journal Of Pediatrics 1983, 102: 443-447. PMID: 6687477, DOI: 10.1016/s0022-3476(83)80673-8.Peer-Reviewed Original ResearchConceptsRespiratory distress syndromeDistress syndromeAirway samplesDay of extubationAirways of infantsSurface tension-lowering propertiesNatural sheep surfactantSupernatant fractionHigher minimum surface tensionsMinimum surface tensionRespiratory failureTracheal intubationSheep surfactantSyndromeInfantsSurfactant functionExtubationIntubation