The increasing incidence of bronchopulmonary dysplasia in premature babies may be due in part to immature ventilatory control, contributing to hypoxemia. The latter responds to ventilation and/or oxygen therapy, treatments associated with adverse sequelae. This is an overview of the Prematurity-Related Ventilatory Control Study which aims to analyze the under-utilized cardiorespiratory continuous waveform monitoring data to delineate mechanisms of immature ventilatory control in preterm infants and identify predictive markers.
Continuous ECG, heart rate, respiratory, and oxygen saturation data will be collected throughout the NICU stay in 500 infants < 29 wks gestation across 5 centers. Mild permissive hypercapnia, and hyperoxia and/or hypoxia assessments will be conducted in a subcohort of infants along with inpatient questionnaires, urine, serum, and DNA samples.
Primary outcomes will be respiratory status at 40 wks and quantitative measures of immature breathing plotted on a standard curve for infants matched at 36–37 wks. Physiologic and/or biologic determinants will be collected to enhance the predictive model linking ventilatory control to outcomes.
By incorporating bedside monitoring variables along with biomarkers that predict respiratory outcomes we aim to elucidate individualized cardiopulmonary phenotypes and mechanisms of ventilatory control contributing to adverse respiratory outcomes in premature infants.
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We thank D.E. McKaig and J.B. Delos, College of William and Mary, for Fig. 4. The National Institutes of Health (NIH) and the National Heart, Lung, and Blood Institute (NHLBI) provided grant support. NHLBI staff had input into the study design, conduct, analysis, and manuscript drafting. The content is solely the responsibility of the authors and does not necessarily represent the official views of the NIH. Participating sites collected and stored the data. The site PIs had full access to individual site data and take responsibility for the integrity of the waveforms. The lead data coordinating center analyzed the data. Drs. Moorman and Lake take responsibility for the integrity of the data and accuracy of the data analysis. We are indebted to our medical and nursing colleagues and infants and parents who agreed to take part in this study. The following investigators participated in this study: Providence, RI: P.A. Dennery, Brown University, Rhode Island Hospital, Hasbro Children’s Hospital Bethesda, MD: A.D. Laposky, A. Natarajan, B.Schmetter., J. Troendle; National Institutes of Health, National Heart, Lung and Blood Institute. Charlottesville, VA: J.R. Moorman, D. Lake, K. Nash Krahn, A.M. Zimmet, A.K. Camblos, S.A. Fowler, K.D. Fairchild, A.A. Flower, P. Pramoonjago, C.A. Rumpel; University of Virginia. Cleveland, OH: A.M. Hibbs, R.J. Martin, J.M. Di Fiore, T. Raffay, P.M. MacFarlane; Case Western Reserve University, University Hospitals Cleveland Medical Center, Rainbow Babies and Children’s Hospital A. Zadell, University Hospitals Cleveland Medical Center, Rainbow Babies & Children’s Hospital C. Tatsuoka, Case Western Reserve University. Valencia, Spain: M.Vento, University and Polytechnic Hospital La Fe, Health Research Institute La Fe. Chicago, IL: A. Hamvas, D. Weese-Mayer, R.A. DeRegnier; Northwestern University, Ann & Robert H. Lurie Children’s Hospital of Chicago and Stanley Manne Children’s Research Institute A. Bradley, M. Carroll, E. Dunne, S. Fair, B. Hopkins, C. Rand, M. Schau; Ann & Robert H. Lurie Children’s Hospital of Chicago and Stanley Manne Children’s Research Institute C.R. Estabrook, Northwestern University. Birmingham, AL: N. Ambalavanan, A. Nakhmani, W.A. Carlo, D. Laney, B. Troxler, C.P. Travers; University of Alabama. P. Indic, University of Texas Tyler, Tyler, TX; University of Alabama. Austin, TX: D. Paydarfar, University of Texas Austin. Worcester, MA: E. Salisbury, University of Massachusetts. Miami, FL: E. Bancalari, N. Claure, A.C. Aguilar, C. D’Ugard, D. Jain, D. Ludwig, A. Schott, S. Vanbuskirk; University of Miami, Holtz Children’s Hospital - Jackson Memorial Medical Center. St. Louis, MO: J. Kemp, R. Colvin, B. Bellm, M. McLeland, J. Hoffmann, K. Schechtman, J. Shimony, C. Smyser, L. Linneman, J. Hoover, B. Warner; Washington University. J. Egan, H. Pyles; St. Louis Children’s Hospital. Little Rock, AR: J.L. Carroll, University of Arkansas. Melbourne, Australia: B. Edwards, Monash University. Supported by NIH grants U01 HL133708, U01 HL133643, U01 HL133704, U01 HL133536, U01 HL133689, U01 HL133700.
DL has a small equity share (<1%) in Medical Predictive Science Corporation, which markets the HeRO heart rate monitoring system. JRM is Chief Medical Officer and shareholder, Advanced Medical Predictive Devices, Diagnostics and Displays, and shareholder, Medical Predictive Science Corporation, both in Charlottesville, VA. All other authors declare no competing interests.
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Respiratory Physiology & Neurobiology (2019)