Dopamine vs. Norepinephrine for Hypotension in Neonates With Pulmonary Hypertension (DONE)

Официальное название

Dopamine vs. Norepinephrine in Term and Late Preterm Neonates With Hypoxemic Respiratory Failure and Systemic Hypotension Due to Pulmonary Hypertension: A Pilot Trial

Обзор

This pilot randomized clinical trial compares dopamine and norepinephrine as first-line vasoactive therapies in term and late preterm neonates with pulmonary hypertension associated with hypoxemic respiratory failure and systemic hypotension. Systemic hypotension is a common and clinically significant complication of persistent pulmonary hypertension of the newborn (PPHN) and frequently requires vasopressor support to maintain adequate systemic perfusion. Dopamine is commonly used in this setting; however, prior animal experimental and clinical data suggest it may increase pulmonary vascular resistance, potentially worsening right ventricular afterload and hypoxemia. Norepinephrine may preferentially increase systemic vascular resistance with less effect on the pulmonary circulation. This study evaluates short-term hemodynamic and oxygenation responses following initiation of dopamine or norepinephrine.

Подробное описание

Persistent pulmonary hypertension of the newborn (PPHN) is a serious cardiopulmonary disorder characterized by sustained elevation of pulmonary vascular resistance, leading to right-to-left shunting, impaired oxygenation, and increased morbidity and mortality. In addition to hypoxemic respiratory failure, many infants with PPHN develop systemic hypotension. Management of systemic hypotension in this population is complex, as vasoactive medications may have differing effects on systemic and pulmonary circulations.

Dopamine is widely used as first-line therapy for neonatal hypotension because of its dose-dependent dopaminergic and adrenergic effects. However, both animal models and clinical observations suggest that dopamine may increase pulmonary vascular resistance in neonates with PPHN. Norepinephrine, a predominantly alpha-adrenergic agonist with modest beta-adrenergic activity, may provide more selective augmentation of systemic vascular resistance while exerting less influence on pulmonary vascular tone. Despite the increasing clinical use of norepinephrine in neonatal intensive care units, there are no prospective trials comparing dopamine and norepinephrine in neonates with PPHN.

This is a single-center, cluster-randomized, pilot clinical trial enrolling term and late preterm neonates with hypoxemic respiratory failure, echocardiographic evidence of pulmonary hypertension, and systemic hypotension that persists despite initial fluid resuscitation. Eligible infants are assigned by time-based cluster randomization to receive either dopamine or norepinephrine as first-line vasoactive therapy, consistent with standard clinical practice in the neonatal intensive care unit. Informed consent is obtained for research-specific procedures, including serial targeted neonatal echocardiography, while vasoactive medication use follows established clinical protocols.

Вмешательства

• Препарат Dopamine administration
  Infants meeting the inclusion criteria who are randomized to dopamine arm will receive dopamine infusion starting at 5 mcg/kg/min, titrated to mean arterial pressure targets based on gestational age, max dose 20 mcg/kg/min.
• Препарат Norepinephrine
  Infants meeting the inclusion criteria who are randomized to norepinephrine arm will receive norepinephrine infusion starting at 0.02 mcg/kg/min, titrated to mean arterial pressure targets based on gestational age, max dose 1 mcg/kg/min.

Первичные конечные точки

• SAP/PAP ratio [Срок оценки: Within 30 hours of vasopressor initiation.]
• LV Cardiac output [Срок оценки: Within 30 hours of vasopressor initiation]
• Oxygenation Indices [Срок оценки: Within 30 hours of vasopressor initiation]

Вторичные конечные точки (3)

• Use of inhaled nitric oxide (iNO) [Срок оценки: Within 30 hours of vasopressor initiation]
• Need for additional vasoactive agents [Срок оценки: Within 30 hours of vasopressor initiation]
• Echocardiographic markers of heart function [Срок оценки: Within 30 hours of vasopressor initiation]

Критерии участия

Критерии включения

• Postmenstrual age > 34 6/7 weeks and Postnatal age ≤ 28 days
• On respiratory support (Invasive mechanical ventilation, NIPPV, CPAP, HFNC ≥ 2 LPM) and FiO2 ≥ 0.3
• Echocardiographic evidence of pulmonary hypertension
• Mean arterial pressure below the threshold for gestational age despite a 10-20 mL/kg fluid bolus

Permissible Comorbidities: CDH, trisomy 21, HIE on hypothermia, PDA, PFO/ASD, VSD < 2 mm

Критерии исключения

• Gestational age < 32 weeks
• Severe hypoxic respiratory failure (OI > 35 or SpO2 < 75% on 100% FiO2 for > 60 minutes)
• Lethal anomalies (e.g., trisomy 13 or 18)
• Complex congenital heart disease beyond specified criteria

Критерии приведены из реестра в оригинале (на английском). Окончательную оценку соответствия проводит исследовательский центр.

Здоровые добровольцы: Нет

Дизайн исследования

Распределение

Рандомизированное

Модель

Параллельные группы

Маскирование

Простое слепое

Основная цель

Лечение

Центры проведения

США · 1 центр

• UC Davis Children's Hospital — Sacramento

Публикации

• Jain A, El-Khuffash AF, van Herpen CH, Resende MHF, Giesinger RE, Weisz D, Mertens L, Jankov RP, McNamara PJ. Cardiac Function and Ventricular Interactions in Persistent Pulmonary Hypertension of the Newborn. Pediatr Crit Care Med. 2021 Feb 1;22(2):e145-e157. doi: 10.1097/PCC.0000000000002579. PMID 33044416
• Lesneski AL, Vali P, Hardie ME, Lakshminrusimha S, Sankaran D. Randomized Trial of Oxygen Saturation Targets during and after Resuscitation and Reversal of Ductal Flow in an Ovine Model of Meconium Aspiration and Pulmonary Hypertension. Children (Basel). 2021 Jul 14;8(7):594. doi: 10.3390/children8070594. PMID 34356574
• Siefkes HM, Lakshminrusimha S. Management of systemic hypotension in term infants with persistent pulmonary hypertension of the newborn: an illustrated review. Arch Dis Child Fetal Neonatal Ed. 2021 Jul;106(4):446-455. doi: 10.1136/archdischild-2020-319705. Epub 2021 Jan 21. PMID 33478959
• Lakshminrusimha S. The pulmonary circulation in neonatal respiratory failure. Clin Perinatol. 2012 Sep;39(3):655-83. doi: 10.1016/j.clp.2012.06.006. PMID 22954275
• Tourneux P, Rakza T, Bouissou A, Krim G, Storme L. Pulmonary circulatory effects of norepinephrine in newborn infants with persistent pulmonary hypertension. J Pediatr. 2008 Sep;153(3):345-9. doi: 10.1016/j.jpeds.2008.03.007. Epub 2008 May 12. PMID 18534241
• Steinhorn RH. Neonatal pulmonary hypertension. Pediatr Crit Care Med. 2010 Mar;11(2 Suppl):S79-84. doi: 10.1097/PCC.0b013e3181c76cdc. PMID 20216169
• Sankaran D, Lakshminrusimha S. Pulmonary hypertension in the newborn- etiology and pathogenesis. Semin Fetal Neonatal Med. 2022 Aug;27(4):101381. doi: 10.1016/j.siny.2022.101381. Epub 2022 Aug 7. PMID 35963740
• McNamara PJ, Giesinger RE, Lakshminrusimha S. Dopamine and Neonatal Pulmonary Hypertension-Pressing Need for a Better Pressor? J Pediatr. 2022 Jul;246:242-250. doi: 10.1016/j.jpeds.2022.03.022. Epub 2022 Mar 18. No abstract available. PMID 35314154

Идентификаторы

NCT: NCT07322133 · 2339428 · GFDS25

Первоисточники (государственные реестры)

• ClinicalTrials.gov (NIH, США)

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