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De Luca D, Bonadies L, Alonso-Ojembarrena A, Martino D, Gutierrez-Rosa I, Loi B, Dasani R, Capasso L, Baraldi E, Davis A, Raimondi F. Quantitative Lung Ultrasonography to Guide Surfactant Therapy in Neonates Born Late Preterm and Later. JAMA Netw Open 2024; 7:e2413446. [PMID: 38805223 PMCID: PMC11134216 DOI: 10.1001/jamanetworkopen.2024.13446] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Accepted: 03/25/2024] [Indexed: 05/29/2024] Open
Abstract
Importance Surfactant administration may be needed in late preterm through full-term neonates, but the pathophysiology of their respiratory failure can be different from that of early preterm neonates. The lung ultrasonography score (LUS) is accurate to guide surfactant replacement in early preterm neonates, but to our knowledge, it has not yet been studied in the late preterm through full-term neonatal population. Objective To assess whether LUS is equally accurate to predict surfactant need in late preterm through full-term neonates as in early preterm neonates. Design, Setting, and Participants This prospective, international, multicenter diagnostic study was performed between December 2022 and November 2023 in tertiary academic neonatal intensive care units in France, Italy, Spain, and the US. Late preterm through full-term neonates (≥34 weeks' gestation) with respiratory failure early after birth were enrolled. Exposure Point-of-care lung ultrasonography to calculate the neonatal LUS (range, 0-18, with higher scores indicating worse aeration), which was registered in dedicated research databases and unavailable for clinical decision-making. Main Outcomes and Measures The main outcomes were the area under the curve (AUC) in receiver operating characteristic analysis and derived accuracy variables, considering LUS as a replacement for other tests (ie, highest global accuracy) and as a triage test (ie, highest sensitivity). Sample size was calculated to assess noninferiority of LUS to predict surfactant need in the study population compared with neonates born more prematurely. Correlations of LUS with the ratio of hemoglobin oxygen saturation as measured by pulse oximetry (SpO2) to fraction of inspired oxygen (FiO2) and with the oxygen saturation index (OSI) were assessed. Results A total of 157 neonates (96 [61.1%] male) were enrolled and underwent lung ultrasonography at a median of 3 hours (IQR, 2-7 hours) of life; 32 (20.4%) needed surfactant administration (pretest probability, 20%). The AUC was 0.87 (95% CI, 0.81-0.92). The highest global accuracy and sensitivity were reached for LUS values higher than 8 or 4 or lower, respectively. Subgroup analysis gave similar diagnostic accuracy in neonates born late preterm (AUC, 0.89; 95% CI, 0.81-0.97; n = 111) and early term and later (AUC, 0.84; 95% CI, 0.73-0.96; n = 46). After adjusting for gestational age, LUS was significantly correlated with SpO2:FiO2 (adjusted β, -10.4; 95% CI, -14.0 to -6.7; P < .001) and OSI (adjusted β, 0.2; 95% CI, 0.1-0.3; P < .001). Conclusions and Relevance In this diagnostic study of late preterm through full-term neonates with respiratory failure early after birth, LUS accuracy to predict surfactant need was not inferior to that observed in earlier preterm neonates. An LUS higher than 8 was associated with highest global accuracy (replacement test), suggesting that it can be used to guide surfactant administration. An LUS value of 4 or lower was associated with the highest sensitivity (triage test), suggesting it is unlikely for this population to need surfactant.
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Affiliation(s)
- Daniele De Luca
- Division of Pediatrics and Neonatal Critical Care, “A. Béclère” Hospital, AP-HP–Paris Saclay University, Paris, France
- Physiopathology and Therapeutic Innovation Unit–INSERM U999, Paris Saclay University, Paris, France
| | - Luca Bonadies
- Neonatal Intensive Care Unit, Department of Women’s and Children’s Health, University Hospital of Padova and Institute of Pediatric Research “Città della Speranza,” Padua, Italy
| | - Almudena Alonso-Ojembarrena
- Neonatal Intensive Care Unit, Puerta del Mar University Hospital, Cádiz, Spain
- Biomedical Research and Innovation Institute of Cádiz (INiBICA), Research Unit, Puerta del Mar University Hospital, Cádiz, Spain
| | - Diletta Martino
- Division of Pediatrics and Neonatal Critical Care, “A. Béclère” Hospital, AP-HP–Paris Saclay University, Paris, France
- Neonatal Intensive Care Unit, Department of Women’s and Children’s Health, University Hospital of Padova and Institute of Pediatric Research “Città della Speranza,” Padua, Italy
| | - Irene Gutierrez-Rosa
- Neonatal Intensive Care Unit, Puerta del Mar University Hospital, Cádiz, Spain
- Biomedical Research and Innovation Institute of Cádiz (INiBICA), Research Unit, Puerta del Mar University Hospital, Cádiz, Spain
| | - Barbara Loi
- Division of Pediatrics and Neonatal Critical Care, “A. Béclère” Hospital, AP-HP–Paris Saclay University, Paris, France
- Physiopathology and Therapeutic Innovation Unit–INSERM U999, Paris Saclay University, Paris, France
| | - Reedhi Dasani
- Department of Pediatrics, Division of Neonatal and Developmental Medicine, Stanford University, School of Medicine, Palo Alto, California
| | - Letizia Capasso
- Division of Neonatology, Department of Translational Medical Sciences, University of Naples Federico II, Naples, Italy
| | - Eugenio Baraldi
- Neonatal Intensive Care Unit, Department of Women’s and Children’s Health, University Hospital of Padova and Institute of Pediatric Research “Città della Speranza,” Padua, Italy
| | - Alexis Davis
- Department of Pediatrics, Division of Neonatal and Developmental Medicine, Stanford University, School of Medicine, Palo Alto, California
| | - Francesco Raimondi
- Division of Neonatology, Department of Translational Medical Sciences, University of Naples Federico II, Naples, Italy
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2
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McKinney RL, Wallström L, Courtney SE, Sindelar R. Novel forms of ventilation in neonates: Neurally adjusted ventilatory assist and proportional assist ventilation. Semin Perinatol 2024; 48:151889. [PMID: 38565434 DOI: 10.1016/j.semperi.2024.151889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
Patient-triggered modes of ventilation are currently the standard of practice in the care of term and preterm infants. Maintaining spontaneous breathing during mechanical ventilation promotes earlier weaning and possibly reduces ventilator-induced diaphragmatic dysfunction. A further development of assisted ventilation provides support in proportion to the respiratory effort and enables the patient to have full control of their ventilatory cycle. In this paper we will review the literature on two of these modes of ventilation: neurally adjusted ventilatory assist (NAVA) and proportional assist ventilation (PAV), propose future studies and suggest clinical applications of these modes.
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Affiliation(s)
- R L McKinney
- Alpert Medical School of Brown University, 593 Eddy Street, Providence, RI 02906, United States.
| | - L Wallström
- Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden
| | - S E Courtney
- Department of Pediatrics, University of Arkansas for Medical Sciences, Little Rock, AR, United States
| | - R Sindelar
- Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden
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Abstract
Chronic pain and agitation in neonatal life impact the developing brain. Oral sweet-tasting solutions should be used judiciously to mitigate behavioral responses to mild painful procedures, keeping in mind that the long-term impact is unknown. Rapidly acting opioids should be used as part of premedication cocktails for nonemergent endotracheal intubations. Continuous low-dose morphine or dexmedetomidine may be considered for preterm or term neonates exhibiting signs of stress during mechanical ventilation and therapeutic hypothermia, respectively. Further research is required regarding the pharmacokinetics, pharmacodynamics, safety, and efficacy of pharmacologic agents used to mitigate mild, moderate, and chronic pain and stress in neonates.
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Affiliation(s)
- Christopher McPherson
- Department of Pharmacy, St. Louis Children's Hospital, 1 Children's Place, St. Louis, MO 63110, USA; Department of Pediatrics, Washington University School of Medicine, 660 South Euclid Avenue, St. Louis, MO 63110, USA.
| | - Ruth E Grunau
- Department of Pediatrics, University of British Columbia, F605B, 4480 Oak Street, Vancouver, BC V6H 3V4, Canada; BC Children's Hospital Research Institute, 938 West 28th Avenue, Vancouver BC V5Z 4H4, Canada
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4
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Abstract
Extremely preterm infants who must suddenly support their own gas exchange with lungs that are incompletely developed and lacking adequate amount of surfactant and antioxidant defenses are susceptible to lung injury. The decades-long quest to prevent bronchopulmonary dysplasia has had limited success, in part because of increasing survival of more immature infants. The process must begin in the delivery room with gentle assistance in establishing and maintaining adequate lung aeration, followed by noninvasive support and less invasive surfactant administration. Various modalities of invasive and noninvasive support have been used with varying degree of effect and are reviewed in this article.
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Kim KT, Knopp J, Dixon B, Chase JG. Quantifying neonatal patient effort using non-invasive model-based methods. Med Biol Eng Comput 2022; 60:739-751. [PMID: 35043368 DOI: 10.1007/s11517-021-02491-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2021] [Accepted: 12/15/2021] [Indexed: 10/19/2022]
Abstract
Patient-specific spontaneous breathing effort (SB) is common in invasively mechanically ventilated (MV) adult patients, and especially common in preterm neonates who are not typically sedated. However, there is no proven, ethically feasible and non-invasive method to quantify SB effort in neonates, creating the potential for model-based measures. Lung mechanics and SB effort are segregated using a basis function model to identify passive lung mechanics, and an additional time-varying elastance model to identify patient-specific SB effort and asynchrony as negative and positive added elastances, respectively. Data from ten preterm neonates on standard MV care in the neonatal intensive care unit (NICU) are used to assess this model-based approach, using area under the curve (AUC) for positive (asynchrony) and negative (SB effort) time-varying elastance. Median [interquartile-range (IQR)] of passive pulmonary lung elastance was 3.82 [2.09-5.80] cmH2O/ml. Median [IQR] AUC quantified SB effort was -0.32 [-0.43--0.12]cmH2O/ml. AUC quantified asynchrony was 0.00 [0.00-0.01]cmH2O/ml, and affected 28% of the 25,287 total breaths. This proof of concept model-based approach provides a non-invasive, computationally straightforward, and thus clinically feasible means to quantify patient-specific spontaneous breathing effort and asynchrony.
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Affiliation(s)
- Kyeong Tae Kim
- Centre for Bioengineering, University of Canterbury, Christchurch, New Zealand.
| | - Jennifer Knopp
- Centre for Bioengineering, University of Canterbury, Christchurch, New Zealand
| | - Bronwyn Dixon
- Neonatal Intensive Care Unit, Christchurch Women's Hospital, Christchurch, New Zealand
| | - J Geoffrey Chase
- Centre for Bioengineering, University of Canterbury, Christchurch, New Zealand
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Lefevere J, Van Delft B, Vervoort M, Cools W, Cools F. Non-invasive neurally adjusted ventilatory assist in preterm infants with RDS: effect of changing NAVA levels. Eur J Pediatr 2022; 181:701-707. [PMID: 34533644 PMCID: PMC8447891 DOI: 10.1007/s00431-021-04244-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 08/10/2021] [Accepted: 08/27/2021] [Indexed: 12/24/2022]
Abstract
We aimed to examine the effect of changing levels of support (NAVA level) during non-invasive neurally adjusted ventilatory assist (NIV-NAVA) in preterm infants with respiratory distress syndrome (RDS) on electrical diaphragm activity. This is a prospective, single-centre, interventional, exploratory study in a convenience sample. Clinically stable preterm infants supported with NIV-NAVA for RDS were eligible. Patients were recruited in the first 24 h after the start of NIV-NAVA. Following a predefined titration protocol, NAVA levels were progressively increased starting from a level of 0.5 cmH2O/µV and with increments of 0.5 cmH2O/µV every 3 min, up to a maximum level of 4.0 cmH2O/µV. We measured the evolution of peak inspiratory pressure and the electrical signal of the diaphragm (Edi) during NAVA level titration. Twelve infants with a mean (SD) gestational age at birth of 30.6 (3.5) weeks and birth weight of 1454 (667) g were enrolled. For all patients a breakpoint could be identified during the titration study. The breakpoint was on average (SD) at a level of 2.33 (0.58) cmH2O/µV. With increasing NAVA levels, the respiratory rate decreased significantly. No severe complications occurred.Conclusions: Preterm neonates with RDS supported with NIV-NAVA display a biphasic response to changing NAVA levels with an identifiable breakpoint. This breakpoint was at a higher NAVA level than commonly used in this clinical situation. Immature neural feedback mechanisms warrant careful monitoring of preterm infants when supported with NIV-NAVA.Trial registration: clinicaltrials.gov NCT03780842. Date of registration December 12, 2018. What is Known: • Non-invasive neurally adjusted ventilatory assist (NIV-NAVA) is a safe, feasible and effective way to support respiration in preterm infants. • Intact neural feedback mechanisms are needed to protect the lung from overdistension in neurally adjusted ventilatory assist. What is New: • Preterm infants with acute RDS have a similar pattern of respiratory unloading as previously described. • Neural feedback mechanisms seem to be immature with the risk of insufficient support and lung injury due to overdistension of the lung.
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Affiliation(s)
- Julie Lefevere
- Neonatology, Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel), Brussels, Belgium. .,Neonatology, (UZ Brussel), Laarbeeklaan 101, 1090, Jette, Belgium.
| | - Brenda Van Delft
- Neonatology, Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel), Brussels, Belgium
| | - Michel Vervoort
- Department of Biotechnology, Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel), Brussels, Belgium
| | - Wilfried Cools
- Interfaculty Centre Data Processing and Statistics, Vrije Universiteit Brussel (VUB), Brussels, Belgium
| | - Filip Cools
- Neonatology, Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel), Brussels, Belgium
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7
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Abstract
Patient-ventilator asynchrony is very common in newborns. Achieving synchrony is quite challenging because of small tidal volumes, high respiratory rates, and the presence of leaks. Leaks also cause unreliable monitoring of respiratory metrics. In addition, ventilator adjustment must take into account that infants have strong vagal reflexes and demonstrate central apnea and periodic breathing, with a high variability in breathing pattern. Neurally adjusted ventilatory assist (NAVA) is a mode of ventilation whereby the timing and amount of ventilatory assist is controlled by the patient's own neural respiratory drive. As NAVA uses the diaphragm electrical activity (Edi) as the controller signal, it is possible to deliver synchronized assist, both invasively and noninvasively (NIV-NAVA), to follow the variability in breathing pattern, and to monitor patient respiratory drive, independent of leaks. This article provides an updated review of the physiology and the scientific literature pertaining to the use of NAVA in children (neonatal and pediatric age groups). Both the invasive NAVA and NIV-NAVA publications since 2016 are summarized, as well as the use of Edi monitoring. Overall, the use of NAVA and Edi monitoring is feasible and safe. Compared with conventional ventilation, NAVA improves patient-ventilator interaction, provides lower peak inspiratory pressure, and lowers oxygen requirements. Evidence from several studies suggests improved comfort, less sedation requirements, less apnea, and some trends toward reduced length of stay and more successful extubation.
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Affiliation(s)
- Jennifer Beck
- Department of Critical Care, St. Michael's Hospital, 30 Bond Street, Toronto, Ontario M5B1W8, Canada; Department of Pediatrics, University of Toronto, Toronto, Canada; Institute for Biomedical Engineering and Science Technology (iBEST) at Ryerson University and St-Michael's Hospital, Toronto, Canada.
| | - Christer Sinderby
- Department of Critical Care, St. Michael's Hospital, 30 Bond Street, Toronto, Ontario M5B1W8, Canada; Institute for Biomedical Engineering and Science Technology (iBEST) at Ryerson University and St-Michael's Hospital, Toronto, Canada; Department of Medicine and Interdepartmental Division of Critical Care Medicine, University of Toronto, Toronto, Canada
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8
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Implementation of noninvasive neurally adjusted ventilatory assist in pediatric acute respiratory failure: a controlled before-after quality improvement study. JOURNAL OF ANESTHESIA, ANALGESIA AND CRITICAL CARE 2021. [PMCID: PMC8413697 DOI: 10.1186/s44158-021-00005-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Backgrounds Pediatric noninvasive neurally adjusted ventilatory assist (NIV-NAVA) has been shown to improve patient-ventilator interaction but no data on clinical outcomes are available. Aim of this study was to compare NIV-NAVA with noninvasive pressure support (NIV-PS) in children with acute hypoxemic respiratory failure (AHRF), in a single-center before-after study. A cohort of thirty-four NIV-PS patients (before group) admitted to our PICU within the 2 years prior NAVA introduction was compared with a cohort of thirty children treated with NIV-NAVA during implementation phase (after group). The primary end-point was intubation rate between groups. Days on mechanical ventilation, number of invasive devices, nosocomial infections, PICU/hospital length of stay (LOS), and physiological parameters at 2 and 24 h after admission were considered. Results Intubation rate was lower in the NIV-NAVA group as compared to the NIV-PS group (p = 0.006). Patients treated with NIV-NAVA required fewer invasive devices (p = 0.032) and had lower incidence of ventilator-acquired pneumonia (p = 0.004) and shorter PICU (p = 0.032) and hospital LOS (p = 0.013). At 2 h, NIV-NAVA compared with NIV-PS resulted in higher paO2:FIO2 (p = 0.017), lower paCO2 (p = 0.002), RR (p = 0.026), and HR (p = 0.009). Conclusions Early NIV-NAVA vs NIV-PS was associated to lower intubation rate and shorter PICU and hospital LOS. Further studies are needed in order to confirm these preliminary data.
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9
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Oda A, Parikka V, Lehtonen L, Azimi S, Porres I, Soukka H. Neurally adjusted ventilatory assist in ventilated very preterm infants: A crossover study. Pediatr Pulmonol 2021; 56:3857-3862. [PMID: 34437773 DOI: 10.1002/ppul.25639] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 08/03/2021] [Accepted: 08/19/2021] [Indexed: 01/08/2023]
Abstract
OBJECTIVE To assess the effects of neurally adjusted ventilatory assist (NAVA) ventilation on oxygenation and respiratory parameters in preterm infants. STUDY DESIGN An observational crossover study with a convenience sample of 19 infants born before 30 gestational weeks. Study parameters were recorded during 3-h periods of both NAVA and conventional ventilation. The proportion of time peripheral oxygen saturation (SpO2 ) and cerebral regional oxygen saturation (cRSO2 ) were within their target ranges, plus the number and severity of desaturation episodes were analyzed. In addition, electrical activity of the diaphragm (Edi), neural respiratory rates, and peak inspiratory pressures (PIPs) were recorded. RESULTS Infants were born at a median age of 264/7 gestational weeks (range: 230/7 -293/7 ); the study was performed at a median age of 20 days (range: 1-82). The proportion of time SpO2 was within the target range, the number of peripheral desaturations or cRSO2 did not differ between the modes. However, the desaturation severity index was lower (131 vs. 152; p = .03) and fewer manual supplemental oxygen adjustments (1.3 vs. 2.2/h; p = .006) were needed during the period of NAVA ventilation following conventional ventilation. The mean Edi (8.1 vs. 11.4 µV; p < .006) and PIP values (14.9 vs. 19.1; p < .001) were lower during the NAVA mode. CONCLUSIONS Although NAVA ventilation did not increase the proportion of time with optimal saturation, it was associated with decreased diaphragmatic activity, lower PIPs, less severe hypoxemic events, and fewer manual oxygen adjustments in very preterm infants.
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Affiliation(s)
- Arata Oda
- Department of Pediatrics and Adolescent Medicine, Turku University Hospital, Turku, Finland
| | - Vilhelmiina Parikka
- Department of Pediatrics and Adolescent Medicine, Turku University Hospital, Turku, Finland.,Department of Clinical Medicine, University of Turku, Turku, Finland
| | - Liisa Lehtonen
- Department of Pediatrics and Adolescent Medicine, Turku University Hospital, Turku, Finland.,Department of Clinical Medicine, University of Turku, Turku, Finland
| | - Sepinoud Azimi
- Department of Information Technology, Faculty of Natural Sciences and Technology, Åbo Akademi University, Turku, Finland
| | - Ivan Porres
- Department of Information Technology, Faculty of Natural Sciences and Technology, Åbo Akademi University, Turku, Finland
| | - Hanna Soukka
- Department of Pediatrics and Adolescent Medicine, Turku University Hospital, Turku, Finland.,Department of Clinical Medicine, University of Turku, Turku, Finland
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Lee J, Parikka V, Lehtonen L, Soukka H. Backup ventilation during neurally adjusted ventilatory assist in preterm infants. Pediatr Pulmonol 2021; 56:3342-3348. [PMID: 34310871 DOI: 10.1002/ppul.25583] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Revised: 06/30/2021] [Accepted: 07/14/2021] [Indexed: 11/07/2022]
Abstract
OBJECTIVE To analyze the proportion of backup ventilation during neurally adjusted ventilatory assist (NAVA) in preterm infants at different postmenstrual ages (PMAs) and to analyze the trends in backup ventilation in relation to clinical deteriorations. METHODS A prospective observational study was conducted in 18 preterm infants born at a median (range) 27+4 (23+4 -34+4 ) weeks of gestation with a median (range) birth weight of 1,100 (460-2,820) g, who received respiratory support with either invasive or noninvasive NAVA. Data on ventilator settings and respiratory variables were collected daily; the mean values of each 24-h recording were computed for each respiratory variable. For clinical deterioration, ventilator data were reviewed at 6-h intervals for 30 h before the event. RESULTS A total of 354 patient days were included: 269 and 85 days during invasive and noninvasive NAVA, respectively. The time on backup ventilation (%/min) significantly decreased with increasing PMA during both invasive and noninvasive NAVA. The neural respiratory rate did not change over time. The median time on backup ventilation was less than 15%/min, and the median neural respiratory rate was more than 45 breaths/min for infants above 26+0 weeks PMA during invasive NAVA. The relative backup ventilation significantly increased before the episode of clinical deterioration. CONCLUSION The proportion of backup ventilation during NAVA showed how the control of breathing matured with increasing PMA. Even the most immature infants triggered most of their breaths by their own respiratory effort. An acute increase in the proportion of backup ventilation anticipated clinical deterioration.
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Affiliation(s)
- Juyoung Lee
- Department of Pediatrics, Inha University Hospital, Incheon, South Korea
- Department of Pediatrics, Inha University College of Medicine, Incheon, South Korea
| | - Vilhelmiina Parikka
- Department of Pediatrics, Turku University Hospital, Turku, Finland
- Department of Pediatrics, University of Turku, Turku, Finland
| | - Liisa Lehtonen
- Department of Pediatrics, Turku University Hospital, Turku, Finland
- Department of Pediatrics, University of Turku, Turku, Finland
| | - Hanna Soukka
- Department of Pediatrics, Turku University Hospital, Turku, Finland
- Department of Pediatrics, University of Turku, Turku, Finland
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11
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Sindelar R, McKinney RL, Wallström L, Keszler M. Proportional assist and neurally adjusted ventilation: Clinical knowledge and future trials in newborn infants. Pediatr Pulmonol 2021; 56:1841-1849. [PMID: 33721418 DOI: 10.1002/ppul.25354] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Revised: 02/16/2021] [Accepted: 03/02/2021] [Indexed: 11/07/2022]
Abstract
Different types of patient triggered ventilator modes have become the mainstay of ventilation in term and preterm newborn infants. Maintaining spontaneous breathing has allowed for earlier weaning and the additive effects of respiratory efforts combined with pre-set mechanical inflations have reduced mean airway pressures, both of which are important components in trying to avoid lung injury and promote normal lung development. New sophisticated modes of assisted ventilation have been developed during the last decades where the control of ventilator support is turned over to the patient. The ventilator detects the respiratory effort and adjusts ventilatory assistance proportionally to each phase of the respiratory cycle, thus enabling the patient to have full control of the start, the duration and the amount of ventilatory assistance. In this paper we will review the literature on the ventilatory modes of proportional assist ventilation and neurally adjusted ventilatory assistance, examine the different ways the signals are analyzed, propose future studies, and suggest ways to apply these modes in the clinical environment.
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Affiliation(s)
- Richard Sindelar
- Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden
| | - Robin L McKinney
- Department of Pediatrics, Alpert Medical School of Brown University, Providence, Rhode Island
| | - Linda Wallström
- Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden
| | - Martin Keszler
- Department of Pediatrics, Alpert Medical School of Brown University, Providence, Rhode Island
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12
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Soukka H, Parkkola R, Lehtonen L. Brain growth in extremely preterm infants before and after implementing NAVA ventilation. Acta Paediatr 2021; 110:1812-1814. [PMID: 33403731 DOI: 10.1111/apa.15749] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 12/21/2020] [Accepted: 01/04/2021] [Indexed: 11/28/2022]
Affiliation(s)
- Hanna Soukka
- Department of pediatric and Adolescent Medicine Turku University Hospital Turku Finland
- University of Turku Turku Finland
| | - Riitta Parkkola
- University of Turku Turku Finland
- Department of Radiology Turku University Hospital Turku Finland
| | - Liisa Lehtonen
- Department of pediatric and Adolescent Medicine Turku University Hospital Turku Finland
- University of Turku Turku Finland
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13
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Neurally adjusted ventilatory assist in neonates with congenital diaphragmatic hernia. J Perinatol 2021; 41:1910-1915. [PMID: 34112964 PMCID: PMC8191439 DOI: 10.1038/s41372-021-01098-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 04/27/2021] [Accepted: 05/06/2021] [Indexed: 01/31/2023]
Abstract
OBJECTIVE To measure short-term outcomes of neonates with congenital diaphragmatic hernia (CDH) while on Neurally Adjusted Ventilator Assist (NAVA), and to measure the impact of a congenitally abnormal diaphragm on NAVA ventilator indices. STUDY DESIGN First, we conducted a retrospective-cohort analysis of 16 neonates with CDH placed on NAVA over a treatment period of 72 h. Second, we performed a case-control study comparing NAVA level and Edi between neonates with CDH and those without CDH. RESULTS Compared to pre-NAVA, there were clinically meaningful improvements in PIP (p < 0.003), Respiratory Severity Score (p < 0.001), MAP (p < 0.001), morphine (p = 0.004), and midazolam use (p = 0.037). Compared to a 1:2 matched group without CDH, there was no meaningful difference in NAVA level (p = 0.286), Edi-Peak (p = 0.315), or Edi-Min (p = 0.266). CONCLUSIONS The potential benefits of NAVA extend to neonates with CDH. There is minimal compensatory change in Edis, and higher/lower ventilator settings compared to neonates without CDH.
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14
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Practical approaches to sedation and analgesia in the newborn. J Perinatol 2021; 41:383-395. [PMID: 33250515 PMCID: PMC7700106 DOI: 10.1038/s41372-020-00878-7] [Citation(s) in RCA: 27] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2020] [Revised: 10/06/2020] [Accepted: 11/12/2020] [Indexed: 11/08/2022]
Abstract
The prevention, assessment, and treatment of neonatal pain and agitation continues to challenge clinicians and researchers. Substantial progress has been made in the past three decades, but numerous outstanding questions remain. In this setting, clinicians must establish safe and compassionate standardized practices that consider available efficacy data, long-term outcomes, and research gaps. Novel approaches with limited data must be carefully considered against historic standards of care with robust data suggesting limited benefit and clear adverse effects. This review summarizes available evidence while suggesting practical clinical approaches to pain assessment and avoidance, procedural analgesia, postoperative analgesia, sedation during mechanical ventilation and therapeutic hypothermia, and the issues of tolerance and withdrawal. Further research in all areas represents an urgent priority for optimal neonatal care. In the meantime, synthesis of available data offers clinicians challenging choices as they balance benefit and risk in vulnerable critically ill neonates.
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15
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DI Nardo M, Lonero M, Staffieri F, DI Mussi R, Murgolo F, Lorusso P, Pham T, Picardo SG, Perrotta D, Cecchetti C, RavÀ L, Grasso S. Can visual inspection of the electrical activity of the diaphragm improve the detection of patient-ventilator asynchronies by pediatric critical care physicians? Minerva Anestesiol 2020; 87:319-324. [PMID: 32755090 DOI: 10.23736/s0375-9393.20.14543-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND Patient-ventilator asynchronies are challenging during pediatric mechanical ventilation. We hypothesized that monitoring the electrical activity of the diaphragm (EAdi) together with the "standard" airway opening pressure (Pao) and flow-time waveforms during pressure support ventilation would improve the ability of a cohort of critical care physicians to detect asynchronies in ventilated children. METHODS We recorded the flow, Pao and EAdi waveforms in ten consecutive patients. The recordings were split in periods of 15 s, each reproducing a ventilator screenshot. From this pool, a team of four experts selected the most representative screenshots including at least one of the three most common asynchronies (missed efforts, auto-triggering and double triggering) and split them into two versions, respectively showing or not the EAdi waveforms. The screenshots were shown in random order in a questionnaire to sixty experienced pediatric intensivists that were asked to identify any episode of patient-ventilator asynchrony. RESULTS Among the ten patients included in the study, only eight had EAdi tracings without artifacts and were analyzed. When the Eadi waveform was shown, the auto-triggering detection improved from 13% to 67% (P<0.0001) and the missed efforts detection improved from 43% to 95% (P<0.0001). The detection of double triggering, instead, did not improve (85% with the EAdi vs. 78% without the EAdi waveform; P=0.52). CONCLUSIONS This single center study suggests that the EAdi waveform may improve the ability of pediatric intensivists to detect missed efforts and auto-triggering asynchronies. Further studies are required to determine the clinical implications of these findings.
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Affiliation(s)
- Matteo DI Nardo
- Department of Pediatric Anesthesia and Critical Care Medicine, Bambino Gesù Children's Hospital, Rome, Italy
| | - Margherita Lonero
- Department of Pediatric Anesthesia and Critical Care Medicine, Bambino Gesù Children's Hospital, Rome, Italy -
| | - Francesco Staffieri
- Section of Veterinary Clinics and Animal Production, Department of Emergency and Organ Transplantation, Aldo Moro University of Bari, Bari, Italy
| | - Rosa DI Mussi
- Section of Anesthesia and Intensive Care, Department of Emergency and Organ Transplantation, Aldo Moro University of Bari, Bari, Italy
| | - Francesco Murgolo
- Section of Anesthesia and Intensive Care, Department of Emergency and Organ Transplantation, Aldo Moro University of Bari, Bari, Italy
| | - Pantaleo Lorusso
- Section of Anesthesia and Intensive Care, Department of Emergency and Organ Transplantation, Aldo Moro University of Bari, Bari, Italy
| | | | - Sergio G Picardo
- Department of Pediatric Anesthesia and Critical Care Medicine, Bambino Gesù Children's Hospital, Rome, Italy
| | - Daniela Perrotta
- Department of Pediatric Anesthesia and Critical Care Medicine, Bambino Gesù Children's Hospital, Rome, Italy
| | - Corrado Cecchetti
- Department of Pediatric Anesthesia and Critical Care Medicine, Bambino Gesù Children's Hospital, Rome, Italy
| | - Lucilla RavÀ
- Unit of Epidemiology and Biostatistics, Bambino Gesù Children's Hospital, Rome, Italy
| | - Salvatore Grasso
- Section of Anesthesia and Intensive Care, Department of Emergency and Organ Transplantation, Aldo Moro University of Bari, Bari, Italy
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Cammarota G, Verdina F, Lauro G, Boniolo E, Tarquini R, Messina A, De Vita N, Sguazzoti I, Perucca R, Corte FD, Vignazia GL, Grossi F, Crudo S, Navalesi P, Santangelo E, Vaschetto R. Neurally adjusted ventilatory assist preserves cerebral blood flow velocity in patients recovering from acute brain injury. J Clin Monit Comput 2020; 35:627-636. [PMID: 32388653 PMCID: PMC7223974 DOI: 10.1007/s10877-020-00523-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2020] [Accepted: 05/05/2020] [Indexed: 12/24/2022]
Abstract
Neurally adjusted ventilatory assist (NAVA) has never been applied in patients recovering from acute brain injury (ABI) because neural respiratory drive could be affected by intracranial disease with detrimental effects on cerebral blood flow (CBF) velocity. Our primary aim was to assess the impact of NAVA and pressure support ventilation (PSV) on CBF velocity. In fifteen adult patients recovering from ABI and undergoing invasive assisted ventilation, PSV and NAVA were applied over 30-min-lasting trials, in the following sequence: PSV1, NAVA, and PSV2. While PSV was set to deliver a tidal volume ranging between 6 and 8 ml kg−1 of predicted body weight, in NAVA the level of assistance was chosen to achieve the same inspiratory peak airway pressure as PSV. At the end of each trial, a sonographic evaluation of CBF mean velocity was bilaterally obtained on the middle cerebral artery and an arterial blood gas sample was taken for analysis. CBF mean velocity was 51.8 [41.9,75.2] cm s−1 at baseline, 51.9 [43.4,71.0] cm s−1 in PSV1, 53.6 [40.7,67.7] cm s−1 in NAVA, and 49.5 [42.1,70.8] cm s−1 in PSV2 (p = 0.0514) on the left and 50.2 [38.0,77.7] cm s−1 at baseline, 47.8 [41.7,68.2] cm s−1 in PSV1, 53.9 [40.1,78.5] cm s−1 in NAVA, and 55.6 [35.9,74.1] cm s−1 in PSV2 (p = 0.8240) on the right side. No differences were detected for pH (p = 0.0551), arterial carbon dioxide tension (p = 0.8142), and oxygenation (p = 0.0928) over the entire study duration. NAVA and PSV preserved CBF velocity in patients recovering from ABI. Trial registration: The present trial was prospectively registered at www.clinicatrials.gov (NCT03721354) on October 18th, 2018.
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Affiliation(s)
- Gianmaria Cammarota
- Department of Anesthesiology and Intensive Care, Azienda Ospedaliero-Universitaria "Maggiore Della Carità", Corso Mazzini18, 28100, Novara, Italy.
| | - Federico Verdina
- Department of Translational Medicine, Università del Piemonte Orientale, Novara, Italy
| | - Gianluigi Lauro
- Department of Translational Medicine, Università del Piemonte Orientale, Novara, Italy
| | - Ester Boniolo
- Department of Translational Medicine, Università del Piemonte Orientale, Novara, Italy
| | - Riccardo Tarquini
- Department of Translational Medicine, Università del Piemonte Orientale, Novara, Italy
| | - Antonio Messina
- Humanitas Clinical and Research Center - IRCCS, Rozzano, MI, Italy
| | - Nello De Vita
- Department of Translational Medicine, Università del Piemonte Orientale, Novara, Italy
| | - Ilaria Sguazzoti
- Department of Anesthesiology and Intensive Care, Azienda Ospedaliero-Universitaria "Maggiore Della Carità", Corso Mazzini18, 28100, Novara, Italy
| | - Raffaella Perucca
- Department of Anesthesiology and Intensive Care, Azienda Ospedaliero-Universitaria "Maggiore Della Carità", Corso Mazzini18, 28100, Novara, Italy
| | - Francesco Della Corte
- Department of Anesthesiology and Intensive Care, Azienda Ospedaliero-Universitaria "Maggiore Della Carità", Corso Mazzini18, 28100, Novara, Italy.,Department of Translational Medicine, Università del Piemonte Orientale, Novara, Italy
| | - Gian Luca Vignazia
- Department of Anesthesiology and Intensive Care, Azienda Ospedaliero-Universitaria "Maggiore Della Carità", Corso Mazzini18, 28100, Novara, Italy
| | - Francesca Grossi
- Department of Anesthesiology and Intensive Care, Azienda Ospedaliero-Universitaria "Maggiore Della Carità", Corso Mazzini18, 28100, Novara, Italy
| | - Samuele Crudo
- Department of Translational Medicine, Università del Piemonte Orientale, Novara, Italy
| | - Paolo Navalesi
- Department of Medicine, University of Padua, Padua, Italy
| | - Erminio Santangelo
- Department of Translational Medicine, Università del Piemonte Orientale, Novara, Italy
| | - Rosanna Vaschetto
- Department of Anesthesiology and Intensive Care, Azienda Ospedaliero-Universitaria "Maggiore Della Carità", Corso Mazzini18, 28100, Novara, Italy.,Department of Translational Medicine, Università del Piemonte Orientale, Novara, Italy
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Proportional assist ventilation (PAV) versus neurally adjusted ventilator assist (NAVA): effect on oxygenation in infants with evolving or established bronchopulmonary dysplasia. Eur J Pediatr 2020; 179:901-908. [PMID: 31980954 PMCID: PMC7220976 DOI: 10.1007/s00431-020-03584-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 01/13/2020] [Accepted: 01/15/2020] [Indexed: 11/11/2022]
Abstract
Both proportional assist ventilation (PAV) and neurally adjusted ventilatory assist (NAVA) provide pressure support synchronised throughout the respiratory cycle proportional to the patient's respiratory demand. Our aim was to compare the effect of these two modes on oxygenation in infants with evolving or established bronchopulmonary dysplasia. Two-hour periods of PAV and NAVA were delivered in random order to 18 infants born less than 32 weeks of gestation. Quasi oxygenation indices ("OI") and alveolar-arterial ("A-a") oxygen gradients at the end of each period on PAV, NAVA and baseline ventilation were calculated using capillary blood samples. The mean "OI" was not significantly different on PAV compared to NAVA (7.8 (standard deviation (SD) 3.2) versus 8.1 (SD 3.4), respectively, p = 0.70, but lower on both than on baseline ventilation (mean baseline "OI" 11.0 (SD 5.0)), p = 0.002, 0.004, respectively). The "A-a" oxygen gradient was higher on PAV and baseline ventilation than on NAVA (20.8 (SD 12.3) and 22.9 (SD 11.8) versus 18.5 (SD 10.8) kPa, p = 0.015, < 0.001, respectively).Conclusion: Both NAVA and PAV improved oxygenation compared to conventional ventilation. There was no significant difference in the mean "OI" between the two modes, but the mean "A-a" gradient was better on NAVA.What is Known:• Proportional assist ventilation (PAV) and neurally adjusted ventilatory assist (NAVA) can improve the oxygenation index (OI) in prematurely born infants.• Both PAV and NAVA can provide support proportional to respiratory drive or demand throughout the respiratory cycle.What is New:• In infants with evolving or established BPD, using capillary blood samples, both PAV and NAVA compared to baseline ventilation resulted in improvement in the "OI", but there was no significant difference in the "OI" on PAV compared to NAVA.• The "alveolar-arterial" oxygen gradient was better on NAVA compared to PAV.
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18
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Yagui ACZ, Gonçalves PA, Murakami SH, Santos AZ, Zacharias RSB, Rebello CM. Is noninvasive neurally adjusted ventilatory assistance (NIV-NAVA) an alternative to NCPAP in preventing extubation failure in preterm infants? J Matern Fetal Neonatal Med 2019; 34:3756-3760. [PMID: 31762348 DOI: 10.1080/14767058.2019.1697669] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Background: Prolonged use of mechanical ventilation is associated with some complications as high mortality and high morbidities as bronchopulmonary dysplasia, ventilator-associated pneumonia, and pneumothorax. However, extubation failure in preterm infants is still high (40-60%) in very low birth weight infants (VLBW). Noninvasive neurally adjusted ventilatory assistance (NIV-NAVA) is triggered by the diaphragmatic electrical activity through a nasogastric tube that synchronizes patient/ventilator respiration, cycle by cycle effectively shortening the assisted cycle trigger and the degree of ventilatory assistance, optimizing the effects of intermittent inspiratory pressure on nasal continuous positive airway pressure (NCPAP). This study aims to compare reintubation rates until 72 h after extubation in preterm infants of high risk for reintubation using NIV-NAVA or NCPAP. Methods: A retrospective study of chart review data collection was performed in a private tertiary hospital. The study was approved by the local institutional Ethics Committee. We included infants considered at high risk of reintubation (BW < 1000 grams; use of invasive mechanical ventilation (IMV) for at least 7 days; or previous extubation failure episode) and compared the two groups according to the type of respiratory support after extubation: 1) NCPAP (n = 32); or 2) NIV-NAVA (n = 17). Demographics data were collected, the primary outcome was reintubation rate until 72 h after extubation. Secondary outcome was time to reintubation, BPD rate, IVH grade ≥ III, pneumothorax and death. Results: There was no difference between both groups in demographic data. The reintubation rate decreased significantly in the NIV-NAVA group compared to NCPAP (50.0-11.7, p < 0.02) despite the significantly higher length of invasive mechanical ventilation (IMV) before extubation attempt in NIV-NAVA group (12.4 versus 5.5 days, p < 0.04). There was no difference between both groups in secondary outcomes. Conclusions: In this small retrospective cohort study, the use of NIV-NAVA as postextubation strategy was effective in reducing extubation failure within 72 hours in preterm infants when compared to traditional NCPAP.
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Affiliation(s)
- Ana C Z Yagui
- Hospital Israelita Albert Einstein , São Paulo, Brazil
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19
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Centorrino R, Dell'Orto V, Gitto E, Conti G, De Luca D. Mechanics of nasal mask-delivered HFOV in neonates: A physiologic study. Pediatr Pulmonol 2019; 54:1304-1310. [PMID: 31091025 DOI: 10.1002/ppul.24358] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Accepted: 04/23/2019] [Indexed: 11/08/2022]
Abstract
OBJECTIVES To clarify if nasal mask influences noninvasive high-frequency oscillatory ventilation (NHFOV) mechanics to optimize the clinical use of nasal mask-delivered NHFOV. WORKING HYPOTHESIS Nasal mask may affect the mechanical efficacy of NHFOV. METHODOLOGY We designed a physiologic study composed of an in vitro phase aiming to investigate pressure transmission and volume delivery in a bench model of nasal mask-delivered NHFOV. In a second phase, we measured the leaks in vivo in a series of neonates receiving nasal mask-delivered NHFOV or other forms of noninvasive respiratory support with same nasal masks. RESULTS In vitro pressure transmission is lower with nasal mask (pressure at the lung [Plung]: 2 [0.8]), than with the endotracheal tube (Plung 9.5 [1.5] cmH2 O; P = 0.007). Same applies for volume delivery (Vol: 0.6 [0.2] vs 1.8 [0.5] mL; P = 0.0001). Increasing ventilatory boundaries slowly affects pressure and volume delivery. Ventilating the model with maximal parameters (∆P = 55 cmH2 O; frequency = 8 Hz) we obtained a Vol 1.5 (0.2) mL. The nasal mask provides lower volume delivery and ventilation, compared with nasal prongs studied in previously published studies. Changing frequency allows a better performance than changing ∆P. In vivo leaks are approximately 30% and are similar during NHFOV or other forms of nasal mask-delivered noninvasive ventilation. CONCLUSIONS Nasal mask-delivered NHFOV is feasible, but it may require more aggressive ventilatory parameters to increase volume delivery and ventilation. The use of the nasal mask is associated with some leaks, but this is independent from the type of noninvasive respiratory support applied.
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Affiliation(s)
- Roberta Centorrino
- Division of Pediatrics and Neonatal Critical Care, "A. Béclère" Medical Centre, South Paris University Hospitals, APHP, Paris, France.,Pediatric and Neonatal Intensive Care Unit, University of Messina, Messina, Italy
| | - Valentina Dell'Orto
- Division of Pediatrics and Neonatal Critical Care, "A. Béclère" Medical Centre, South Paris University Hospitals, APHP, Paris, France
| | - Eloisa Gitto
- Pediatric and Neonatal Intensive Care Unit, University of Messina, Messina, Italy
| | - Giorgio Conti
- Ventilab, Institute of Anesthesiology and Critical Care, Catholic University of the Sacred Heart, Roma, Italy
| | - Daniele De Luca
- Division of Pediatrics and Neonatal Critical Care, "A. Béclère" Medical Centre, South Paris University Hospitals, APHP, Paris, France.,Ventilab, Institute of Anesthesiology and Critical Care, Catholic University of the Sacred Heart, Roma, Italy.,Physiopathology and Therapeutic Innovation Unit, INSERM U999, South Paris-Saclay University, Paris, France
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20
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Oda A, Kamei Y, Hiroma T, Nakamura T. Neurally adjusted ventilatory assist in extremely low-birthweight infants. Pediatr Int 2018; 60:844-848. [PMID: 29944776 DOI: 10.1111/ped.13646] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2018] [Revised: 05/28/2018] [Accepted: 06/22/2018] [Indexed: 12/15/2022]
Abstract
BACKGROUND Neurally adjusted ventilatory assist (NAVA) is expected to improve respiratory outcomes in preterm infants, but it has not yet been evaluated. We investigated whether NAVA could improve respiratory outcomes and reduce sedation use in extremely low-birthweight infants (ELBWI). METHODS A retrospective cohort study was conducted based on patient charts at the Nagano Children's Hospital neonatal intensive care unit, Japan. Infants who were born at <27 weeks' gestation were included. We assessed the prevalence of bronchopulmonary dysplasia (BPD), home oxygen therapy (HOT), duration of intubation, and sedation use. RESULTS The NAVA group consisted of 14 ELBWI who were born at <27 weeks' gestation between September 2013 and September 2015. A total of 21 ELBWI born between September 2011 and September 2013, before NAVA implementation, served as the control group. There were no significant differences in the perinatal background characteristics between the two groups. For respiratory outcomes, no significant between-group differences were found in the prevalence of BPD and HOT or the duration of intubation. The total duration of sedation use was not significantly different between the two groups, but in the NAVA group, midazolam was discontinued in all cases after the infants were switched to NAVA. CONCLUSIONS NAVA was safe in preterm infants and had a similar effect to conventional mechanical ventilation with regard to respiratory outcomes and sedation use in the chronic phase; thus, NAVA could be used in the early phase, at least before BPD worsens to improve respiratory outcomes in ELBWI.
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Affiliation(s)
- Arata Oda
- Division of Neonatology, Nagano Children's Hospital, Shinshu University, Nagano, Japan.,Division of Pediatrics and Adolescent Medicine, Turku University Hospital, Turku, Finland
| | - Yoshiya Kamei
- Division of Neonatology, Nagano Children's Hospital, Shinshu University, Nagano, Japan
| | - Takehiko Hiroma
- Division of Neonatology, Nagano Children's Hospital, Shinshu University, Nagano, Japan.,Division of Neonatology, Shinshu University, Nagano, Japan
| | - Tomohiko Nakamura
- Division of Neonatology, Nagano Children's Hospital, Shinshu University, Nagano, Japan.,Division of Neonatology, Shinshu University, Nagano, Japan
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21
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Garofalo E, Bruni A, Pelaia C, Liparota L, Lombardo N, Longhini F, Navalesi P. Recognizing, quantifying and managing patient-ventilator asynchrony in invasive and noninvasive ventilation. Expert Rev Respir Med 2018; 12:557-567. [DOI: 10.1080/17476348.2018.1480941] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Eugenio Garofalo
- Anesthesia and Intensive Care, Department of Medical and Surgical Sciences, Magna Graecia University, Catanzaro, Italy
| | - Andrea Bruni
- Anesthesia and Intensive Care, Department of Medical and Surgical Sciences, Magna Graecia University, Catanzaro, Italy
| | - Corrado Pelaia
- Anesthesia and Intensive Care, Department of Medical and Surgical Sciences, Magna Graecia University, Catanzaro, Italy
| | - Luisa Liparota
- Anesthesia and Intensive Care, Department of Medical and Surgical Sciences, Magna Graecia University, Catanzaro, Italy
| | - Nicola Lombardo
- Otolaryngology, Department of Medical and Surgical Sciences, Magna Graecia University, Catanzaro, Italy
| | - Federico Longhini
- Anesthesia and Intensive Care, Sant’Andrea Hospital, Vercelli, Italy
| | - Paolo Navalesi
- Anesthesia and Intensive Care, Department of Medical and Surgical Sciences, Magna Graecia University, Catanzaro, Italy
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22
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Conti G, Spinazzola G, Gregoretti C, Ferrone G, Cortegiani A, Festa O, Piastra M, Tortorolo L, Costa R. Comparative bench study evaluation of different infant interfaces for non-invasive ventilation. BMC Pulm Med 2018; 18:57. [PMID: 29625596 PMCID: PMC5889592 DOI: 10.1186/s12890-018-0620-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 03/29/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND To compare, in terms of patient-ventilator interaction and performance, a new nasal mask (Respireo, AirLiquide, FR) with the Endotracheal tube (ET) and a commonly used nasal mask (FPM, Fisher and Paykel, NZ) for delivering Pressure Support Ventilation (PSV) in an infant model of Acute Respiratory Failure (ARF). METHODS An active test lung (ASL 5000) connected to an infant mannequin through 3 different interfaces (Respireo, ET and FPM), was ventilated with a standard ICU ventilator set in PSV. The test lung was set to simulate a 5.5 kg infant with ARF, breathing at 50 and 60 breaths/min). Non-invasive ventilation (NIV) mode was not used and the leaks were nearly zero. RESULTS The ET showed the shortest inspiratory trigger delay and pressurization time compared to FPM and Respireo (p < 0.01). At each respiratory rate tested, the FPM showed the shortest Expiratory trigger delay compared to ET and Respireo (p < 0.01). The Respireo presented a lower value of Inspiratory pressure-time product and trigger pressure drop than ET (p < 0.01), while no significant difference was found in terms of pressure-time product at 300 and 500 ms. During all tests, compared with the FPM, ET showed a significantly higher tidal volume (VT) delivered (p < 0.01), while Respireo showed a trend toward an increase of tidal volume delivered compared with FPM. CONCLUSIONS The ET showed a better patient-ventilator interaction and performance compared to both the nasal masks. Despite the higher internal volume, Respireo showed a trend toward an increase of the delivered tidal volume; globally, its efficiency in terms of patient-ventilator interaction was comparable to the FPM, which is the infant NIV mask characterized by the smaller internal volume among the (few) models on the market.
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Affiliation(s)
- Giorgio Conti
- Intensive Care and Anaesthesia Department and Ventilab, Catholic University of Rome, Policlinico A. Gemelli, Largo Agostino Gemelli 8, 00168, Rome, Italy
| | - Giorgia Spinazzola
- Intensive Care and Anaesthesia Department and Ventilab, Catholic University of Rome, Policlinico A. Gemelli, Largo Agostino Gemelli 8, 00168, Rome, Italy
| | - Cesare Gregoretti
- Department of Biopathology and Medical Biotechnologies (DIBIMED), Section of Anesthesia, Analgesia, Intensive Care and Emergency. Policlinico Paolo Giaccone, University of Palermo, Via del vespro 129, 90127, Palermo, Italy
| | - Giuliano Ferrone
- Intensive Care and Anaesthesia Department and Ventilab, Catholic University of Rome, Policlinico A. Gemelli, Largo Agostino Gemelli 8, 00168, Rome, Italy
| | - Andrea Cortegiani
- Department of Biopathology and Medical Biotechnologies (DIBIMED), Section of Anesthesia, Analgesia, Intensive Care and Emergency. Policlinico Paolo Giaccone, University of Palermo, Via del vespro 129, 90127, Palermo, Italy.
| | - Olimpia Festa
- Intensive Care and Anaesthesia Department and Ventilab, Catholic University of Rome, Policlinico A. Gemelli, Largo Agostino Gemelli 8, 00168, Rome, Italy
| | - Marco Piastra
- Intensive Care and Anaesthesia Department and Ventilab, Catholic University of Rome, Policlinico A. Gemelli, Largo Agostino Gemelli 8, 00168, Rome, Italy
| | - Luca Tortorolo
- Intensive Care and Anaesthesia Department and Ventilab, Catholic University of Rome, Policlinico A. Gemelli, Largo Agostino Gemelli 8, 00168, Rome, Italy
| | - Roberta Costa
- Intensive Care and Anaesthesia Department and Ventilab, Catholic University of Rome, Policlinico A. Gemelli, Largo Agostino Gemelli 8, 00168, Rome, Italy
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23
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Oda A, Lehtonen L, Soukka H. Neurally adjusted ventilatory assist can be used to wean infants with congenital diaphragmatic hernias off respiratory support. Acta Paediatr 2018; 107:718-719. [PMID: 29247545 DOI: 10.1111/apa.14191] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Arata Oda
- Department of Pediatrics and Adolescent Medicine; Turku University Hospital; Turku Finland
| | - Liisa Lehtonen
- Department of Pediatrics and Adolescent Medicine; Turku University Hospital; Turku Finland
| | - Hanna Soukka
- Department of Pediatrics and Adolescent Medicine; Turku University Hospital; Turku Finland
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24
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Soreze Y, Motte E, Dell'Orto V, Yousef N, De Luca D. Use of neurally adjusted ventilator assist in postsurgical hemidiaphragmatic paralysis. Arch Dis Child Fetal Neonatal Ed 2018; 103:F86-F87. [PMID: 29092910 DOI: 10.1136/archdischild-2017-313570] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 10/13/2017] [Indexed: 11/04/2022]
Affiliation(s)
- Yohan Soreze
- Division of Paediatrics and Neonatal Critical Care, "A. Béclère" Medical Centre, South Paris University Hospitals, APHP, Paris, France
| | - Emmanuelle Motte
- Division of Paediatrics and Neonatal Critical Care, "A. Béclère" Medical Centre, South Paris University Hospitals, APHP, Paris, France
| | - Valentina Dell'Orto
- Division of Paediatrics and Neonatal Critical Care, "A. Béclère" Medical Centre, South Paris University Hospitals, APHP, Paris, France
| | - Nadya Yousef
- Division of Paediatrics and Neonatal Critical Care, "A. Béclère" Medical Centre, South Paris University Hospitals, APHP, Paris, France
| | - Daniele De Luca
- Division of Paediatrics and Neonatal Critical Care, "A. Béclère" Medical Centre, South Paris University Hospitals, APHP, Paris, France
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Rosterman JL, Pallotto EK, Truog WE, Escobar H, Meinert KA, Holmes A, Dai H, Manimtim WM. The impact of neurally adjusted ventilatory assist mode on respiratory severity score and energy expenditure in infants: a randomized crossover trial. J Perinatol 2018; 38:59-63. [PMID: 29072677 DOI: 10.1038/jp.2017.154] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 08/01/2017] [Accepted: 08/30/2017] [Indexed: 11/09/2022]
Abstract
OBJECTIVE Examine respiratory severity scores (RSS) (mean airway pressure × fraction of inspired oxygen) and resting energy expenditure (REE) on neurally adjusted ventilatory assist (NAVA) compared with synchronized intermittent mandatory ventilation with pressure controlled and supported breath (SIMV (PC)PS). STUDY DESIGN A randomized, crossover trial in a level IV neonatal intensive care unit. Twenty-four patients were ventilated with NAVA or SIMV (PC) PS for 12 h and then crossed over to the alternative mode for 12 h. The primary outcome (RSS) and additional secondary respiratory outcomes were analyzed. RESULTS RSS and measured REE were not different between modes. On NAVA, peak inspiratory pressures were lower (17.8 vs 19.9 cmH2O (P<0.05)) without higher oxygen requirements. Respiratory rates were higher on NAVA (52 vs 39 (P<0.05)), estimated work of breathing (WOB) (0.01 vs 0.04 J l-1 (P<0.05)) was improved. CONCLUSION NAVA mode can be safe without increase in RSS or REE. Although respiratory rates were higher, this was offset by lower peak inspiratory pressures and WOB during NAVA.
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Affiliation(s)
- J L Rosterman
- Children's Mercy-Kansas City, University of Missouri-Kansas City School of Medicine, Kansas City, MO, USA
| | - E K Pallotto
- Children's Mercy-Kansas City, University of Missouri-Kansas City School of Medicine, Kansas City, MO, USA
| | - W E Truog
- Children's Mercy-Kansas City, University of Missouri-Kansas City School of Medicine, Kansas City, MO, USA
| | - H Escobar
- Children's Mercy-Kansas City, University of Missouri-Kansas City School of Medicine, Kansas City, MO, USA
| | - K A Meinert
- Children's Mercy-Kansas City, University of Missouri-Kansas City School of Medicine, Kansas City, MO, USA
| | - A Holmes
- Children's Mercy-Kansas City, University of Missouri-Kansas City School of Medicine, Kansas City, MO, USA
| | - H Dai
- Children's Mercy-Kansas City, University of Missouri-Kansas City School of Medicine, Kansas City, MO, USA
| | - W M Manimtim
- Children's Mercy-Kansas City, University of Missouri-Kansas City School of Medicine, Kansas City, MO, USA
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Neural Breathing Pattern and Patient-Ventilator Interaction During Neurally Adjusted Ventilatory Assist and Conventional Ventilation in Newborns. Pediatr Crit Care Med 2018; 19:48-55. [PMID: 29189671 DOI: 10.1097/pcc.0000000000001385] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
OBJECTIVE To compare neurally adjusted ventilatory assist and conventional ventilation on patient-ventilator interaction and neural breathing patterns, with a focus on central apnea in preterm infants. DESIGN Prospective, observational cross-over study of intubated and ventilated newborns. Data were collected while infants were successively ventilated with three different ventilator conditions (30 min each period): 1) synchronized intermittent mandatory ventilation (SIMV) combined with pressure support at the clinically prescribed, SIMV with baseline settings (SIMVBL), 2) neurally adjusted ventilatory assist, 3) same as SIMVBL, but with an adjustment of the inspiratory time of the mandatory breaths (SIMV with adjusted settings [SIMVADJ]) using feedback from the electrical activity of the diaphragm). SETTING Regional perinatal center neonatal ICU. PATIENTS Neonates admitted in the neonatal ICU requiring invasive mechanical ventilation. MEASUREMENTS AND MAIN RESULTS Twenty-three infants were studied, with median (range) gestational age at birth 27 weeks (24-41 wk), birth weight 780 g (490-3,610 g), and 7 days old (1-87 d old). Patient ventilator asynchrony, as quantified by the NeuroSync index, was lower during neurally adjusted ventilatory assist (18.3% ± 6.3%) compared with SIMVBL (46.5% ±11.7%; p < 0.05) and SIMVADJ (45.8% ± 9.4%; p < 0.05). There were no significant differences in neural breathing parameters, or vital signs, except for the end-expiratory electrical activity of the diaphragm, which was lower during neurally adjusted ventilatory assist. Central apnea, defined as a flat electrical activity of the diaphragm more than 5 seconds, was significantly reduced during neurally adjusted ventilatory assist compared with both SIMV periods. These results were comparable for term and preterm infants. CONCLUSIONS Patient-ventilator interaction appears to be improved with neurally adjusted ventilatory assist. Analysis of the neural breathing pattern revealed a reduction in central apnea during neurally adjusted ventilatory assist use.
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Rossor TE, Hunt KA, Shetty S, Greenough A. Neurally adjusted ventilatory assist compared to other forms of triggered ventilation for neonatal respiratory support. Cochrane Database Syst Rev 2017; 10:CD012251. [PMID: 29077984 PMCID: PMC6485908 DOI: 10.1002/14651858.cd012251.pub2] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
BACKGROUND Effective synchronisation of infant respiratory effort with mechanical ventilation may allow adequate gas exchange to occur at lower peak airway pressures, potentially reducing barotrauma and volutrauma and development of air leaks and bronchopulmonary dysplasia. During neurally adjusted ventilatory assist ventilation (NAVA), respiratory support is initiated upon detection of an electrical signal from the diaphragm muscle, and pressure is provided in proportion to and synchronous with electrical activity of the diaphragm (EADi). Compared to other modes of triggered ventilation, this may provide advantages in improving synchrony. OBJECTIVES Primary• To determine whether NAVA, when used as a primary or rescue mode of ventilation, results in reduced rates of bronchopulmonary dysplasia (BPD) or death among term and preterm newborn infants compared to other forms of triggered ventilation• To assess the safety of NAVA by determining whether it leads to greater risk of intraventricular haemorrhage (IVH), periventricular leukomalacia, or air leaks when compared to other forms of triggered ventilation Secondary• To determine whether benefits of NAVA differ by gestational age (term or preterm)• To determine whether outcomes of cross-over trials performed during the first two weeks of life include peak pressure requirements, episodes of hypocarbia or hypercarbia, oxygenation index, and the work of breathing SEARCH METHODS: We performed searches of the Cochrane Central Register of Controlled Trials (CENTRAL) in the Cohrane Library; MEDLINE via Ovid SP (January 1966 to March 2017); Embase via Ovid SP (January 1980 to March 2017); the Cumulative Index to Nursing and Allied Health Literature (CINAHL) via EBSCO host (1982 to March 2017); and the Web of Science (1985 to 2017). We searched abstracts from annual meetings of the Pediatric Academic Societies (PAS) (2000 to 2016); meetings of the European Society of Pediatric Research (published in Pediatric Research); and meetings of the Perinatal Society of Australia and New Zealand (PSANZ) (2005 to 2016). We also searched clinical trials databases to March 2017. SELECTION CRITERIA We included randomised and quasi-randomised clinical trials including cross-over trials comparing NAVA with other modes of triggered ventilation (assist control ventilation (ACV),synchronous intermittent mandatory ventilation plus pressure support (SIMV ± PS), pressure support ventilation (PSV), or proportional assist ventilation (PAV)) used in neonates. DATA COLLECTION AND ANALYSIS Primary outcomes of interest from randomised controlled trials were all-cause mortality, bronchopulmonary dysplasia (BPD; defined as oxygen requirement at 28 days), and a combined outcome of all-cause mortality or BPD. Secondary outcomes were duration of mechanical ventilation, incidence of air leak, incidence of IVH or periventricular leukomalacia, and survival with an oxygen requirement at 36 weeks' postmenstrual age.Outcomes of interest from cross-over trials were maximum fraction of inspired oxygen, mean peak inspiratory pressure, episodes of hypocarbia, and episodes of hypercarbia measured across the time period of each arm of the cross-over. We planned to assess work of breathing; oxygenation index, and thoraco-abdominal asynchrony at the end of the time period of each arm of the cross-over study. MAIN RESULTS We included one randomised controlled study comparing NAVA versus patient-triggered time-cycled pressure-limited ventilation. This study found no significant difference in duration of mechanical ventilation, nor in rates of BPD, pneumothorax, or IVH. AUTHORS' CONCLUSIONS Risks and benefits of NAVA compared to other forms of ventilation for neonates are uncertain. Well-designed trials are required to evaluate this new form of triggered ventilation.
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Affiliation(s)
- Thomas E Rossor
- King’s College LondonDivision of Asthma, Allergy and Lung Biology, MRC Centre for Allergic Mechanisms in AsthmaBessemer RoadLondonUK
| | | | - Sandeep Shetty
- King’s College LondonDivision of Asthma, Allergy and Lung Biology, MRC Centre for Allergic Mechanisms in AsthmaBessemer RoadLondonUK
| | - Anne Greenough
- King’s College LondonDivision of Asthma, Allergy and Lung Biology, MRC Centre for Allergic Mechanisms in AsthmaBessemer RoadLondonUK
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Gupta M, Bergel M, Betancourt N, Mahan VL. Neurally Adjusted Ventilatory Assist Mode in Pediatric Intensive Care Unit and Pediatric Cardiac Care Unit. EXPLORATORY RESEARCH AND HYPOTHESIS IN MEDICINE 2017; 2:33-37. [DOI: 10.14218/erhm.2016.00027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Reiterer F, Schwaberger B, Freidl T, Schmölzer G, Pichler G, Urlesberger B. Lung-protective ventilatory strategies in intubated preterm neonates with RDS. Paediatr Respir Rev 2017; 23:89-96. [PMID: 27876355 DOI: 10.1016/j.prrv.2016.10.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Accepted: 10/20/2016] [Indexed: 11/16/2022]
Abstract
This article provides a narrative review of lung-protective ventilatory strategies (LPVS) in intubated preterm infants with RDS. A description of strategies is followed by results on short-and long-term respiratory and neurodevelopmental outcomes. Strategies will include patient-triggered or synchronized ventilation, volume targeted ventilation, the technique of intubation, surfactant administration and rapid extubation to NCPAP (INSURE), the open lung concept, strategies of high-frequency ventilation, and permissive hypercapnia. Based on this review single recommendations on optimal LPVS cannot be made. Combinations of several strategies, individually applied, most probably minimize or avoid potential serious respiratory and cerebral complications like bronchopulmonary dysplasia and cerebral palsy.
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Affiliation(s)
- F Reiterer
- Division of Neonatology, Department of Pediatrics and Adolescence Medicine, Medical University Graz, Austria.
| | - B Schwaberger
- Division of Neonatology, Department of Pediatrics and Adolescence Medicine, Medical University Graz, Austria
| | - T Freidl
- Division of Neonatology, Department of Pediatrics and Adolescence Medicine, Medical University Graz, Austria
| | - G Schmölzer
- Centre for the Studies of Asphyxia and Resuscitation, Neonatal Research Unit, Royal Alexandra Hospital, Edmonton, Canada; Department of Pediatrics, University of Alberta, Edmonton, Canada
| | - G Pichler
- Division of Neonatology, Department of Pediatrics and Adolescence Medicine, Medical University Graz, Austria
| | - B Urlesberger
- Division of Neonatology, Department of Pediatrics and Adolescence Medicine, Medical University Graz, Austria
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Shetty S, Hunt K, Peacock J, Ali K, Greenough A. Crossover study of assist control ventilation and neurally adjusted ventilatory assist. Eur J Pediatr 2017; 176:509-513. [PMID: 28180985 DOI: 10.1007/s00431-017-2866-3] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2016] [Revised: 01/22/2017] [Accepted: 01/25/2017] [Indexed: 10/20/2022]
Abstract
UNLABELLED Some studies of infants with acute respiratory distress have demonstrated that neurally adjusted ventilator assist (NAVA) had better short-term results compared to non-triggered or other triggered models. We determined if very prematurely born infants with evolving or established bronchopulmonary dysplasia (BPD) had a lower oxygenation index (OI) on NAVA compared to assist control ventilation (ACV). Infants were studied for 1 h each on each mode. At the end of each hour, blood gas analysis was performed and the OI calculated. The inspired oxygen concentration (FiO2), the peak inflation (PIP) and mean airway pressures (MAP) and compliance were averaged from the last 5 min on each mode. Nine infants, median gestational age of 25 (range 22-27) weeks, were studied at a median postnatal age of 20 (range 8-84) days. The mean OI after 1 h on NAVA was 7.9 compared to 11.1 on ACV (p = 0.0007). The FiO2 (0.36 versus 0.45, p = 0.007), PIP (16.7 versus 20.1 cm H2O, p = 0.017) and MAP (9.2 versus 10.5 cm H2O, p = 0.004) were lower on NAVA. Compliance was higher on NAVA (0.62 versus 0.50 ml/cmH2O/kg, p = 0.005). CONCLUSION NAVA compared to ACV improved oxygenation in prematurely born infants with evolving or established BPD. What is Known: • Neurally assist ventilator adjust (NAVA) uses the electrical activity of the diaphragm to servo control the applied pressure. • In infants with acute RDS, use of NAVA was associated with lower peak inflation pressures and higher tidal volumes. What is New: • This study uniquely reports infants with evolving or established BPD, and their results were compared on 1 h each of NAVA and assist controlled ventilation. • On NAVA, infants had superior (lower) oxygen indices, lower inspired oxygen concentrations and peak and mean airway pressures and higher compliance.
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Affiliation(s)
- Sandeep Shetty
- Division of Asthma, Allergy and Lung Biology, MRC & Asthma UK Centre in Allergic Mechanisms of Asthma, King's College London, London, UK
| | - Katie Hunt
- Division of Asthma, Allergy and Lung Biology, MRC & Asthma UK Centre in Allergic Mechanisms of Asthma, King's College London, London, UK
| | - Janet Peacock
- Division of Health and Social Care Research, King's College London, London, UK.,NIHR Biomedical Research Centre at Guy's and St Thomas' NHS Foundation Trust and King's College London, London, UK
| | - Kamal Ali
- Neonatal Intensive Care Centre, King's College Hospital NHS Foundation Trust, London, UK
| | - Anne Greenough
- Division of Asthma, Allergy and Lung Biology, MRC & Asthma UK Centre in Allergic Mechanisms of Asthma, King's College London, London, UK. .,NIHR Biomedical Research Centre at Guy's and St Thomas' NHS Foundation Trust and King's College London, London, UK. .,Neonatal Intensive Care Unit, 4th Floor Golden Jubilee Wing, King's College Hospital, Denmark Hill, London, SE5 9RS, UK.
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Firestone KS, Beck J, Stein H. Neurally Adjusted Ventilatory Assist for Noninvasive Support in Neonates. Clin Perinatol 2016; 43:707-724. [PMID: 27837754 DOI: 10.1016/j.clp.2016.07.007] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Noninvasive ventilation (NIV) is frequently used in the NICU to avoid intubation or as postextubation support for spontaneously breathing infants experiencing respiratory distress. Neurally adjusted ventilatory assist (NAVA) is used as a mode of noninvasive support in which both the timing and degree of ventilatory assist are controlled by the patient. NIV-NAVA has been successfully used clinically in neonates as a mode of ventilation to prevent intubation, allow early extubation, and as a novel way to deliver nasal continuous positive airway pressure.
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Affiliation(s)
- Kimberly S Firestone
- Neonatal Respiratory Outreach Clinical Liaison, Neonatal Intensive Care Unit, Neonatology Department, Akron Children's Hospital, One Perkins Square, Akron, OH 44308, USA
| | - Jennifer Beck
- Keenan Research Centre for Biomedical Science, St. Michael's Hospital, Department of Pediatrics, University of Toronto, 30 Bond Street, Toronto, ON M5B 1W8, Canada; Institute for Biomedical Engineering and Science Technology (iBEST), Ryerson University and St. Michael's Hospital, Department of Chemistry and Biology, 350 Victoria Street, Toronto, ON M5B 2K3, Canada
| | - Howard Stein
- Neonatal Intensive Care Unit, Promedica Toledo Children's Hospital, Department of Pediatrics, 2142 North Cove Boulevard, Toledo, OH 43606, USA; University of Toledo, Department of Pediatrics, University of Toledo Health Science Campus, 3000 Arlington Avenue, Toledo, OH 43614, USA.
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Early Noninvasive Neurally Adjusted Ventilatory Assist Versus Noninvasive Flow-Triggered Pressure Support Ventilation in Pediatric Acute Respiratory Failure: A Physiologic Randomized Controlled Trial. Pediatr Crit Care Med 2016; 17:e487-e495. [PMID: 27749511 DOI: 10.1097/pcc.0000000000000947] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVE Neurally adjusted ventilatory assist has been shown to improve patient-ventilator interaction in children with acute respiratory failure. Objective of this study was to compare the effect of noninvasive neurally adjusted ventilatory assist versus noninvasive flow-triggered pressure support on patient-ventilator interaction in children with acute respiratory failure, when delivered as a first-line respiratory support. DESIGN Prospective randomized crossover physiologic study. SETTING Pediatric six-bed third-level PICU. PATIENTS Eighteen children with acute respiratory failure needing noninvasive ventilation were enrolled at PICU admission. INTERVENTIONS Enrolled children were allocated to receive two 60-minutes noninvasive flow-triggered pressure support and noninvasive neurally adjusted ventilatory assist trials in a crossover randomized sequence. MEASUREMENTS AND MAIN RESULTS Primary endpoint was the asynchrony index. Parameters describing patient-ventilator interaction and gas exchange were also considered as secondary endpoints. Noninvasive neurally adjusted ventilatory assist compared to noninvasive flow-triggered pressure support: 1) reduced asynchrony index (p = 0.001) and the number of asynchronies per minute for each type of asynchrony; 2) it increased the neuroventilatory efficiency index (p = 0.001), suggesting better neuroventilatory coupling; 3) reduced inspiratory and expiratory delay times (p = 0.001) as well as lower peak and mean airway pressure (p = 0.006 and p = 0.038, respectively); 4) lowered oxygenation index (p = 0.043). No adverse event was reported. CONCLUSIONS In children with mild early acute respiratory failure, noninvasive neurally adjusted ventilatory assist was feasible and safe. Noninvasive neurally adjusted ventilatory assist compared to noninvasive flow-triggered pressure support improved patient-ventilator interaction.
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Neurally adjusted ventilatory assist (NAVA) in preterm newborn infants with respiratory distress syndrome-a randomized controlled trial. Eur J Pediatr 2016; 175:1175-1183. [PMID: 27502948 DOI: 10.1007/s00431-016-2758-y] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Revised: 07/11/2016] [Accepted: 07/29/2016] [Indexed: 12/17/2022]
Abstract
UNLABELLED Neurally adjusted ventilatory assist (NAVA) improves patient-ventilator synchrony during invasive ventilation and leads to lower peak inspiratory pressures (PIP) and oxygen requirements. The aim of this trial was to compare NAVA with current standard ventilation in preterm infants in terms of the duration of invasive ventilation. Sixty infants born between 28 + 0 and 36 + 6 weeks of gestation and requiring invasive ventilation due to neonatal respiratory distress syndrome (RDS) were randomized to conventional ventilation or NAVA. The median durations of invasive ventilation were 34.7 h (quartiles 22.8-67.9 h) and 25.8 h (15.6-52.1 h) in the NAVA and control groups, respectively (P = 0.21). Lower PIPs were achieved with NAVA (P = 0.02), and the rapid reduction in PIP after changing the ventilation mode to NAVA made following the predetermined extubation criteria challenging. The other ventilatory and vital parameters did not differ between the groups. Frequent apneas and persistent pulmonary hypertension were conditions that limited the use of NAVA in 17 % of the patients randomized to the NAVA group. Similar cumulative doses of opiates were used in both groups (P = 0.71). CONCLUSIONS NAVA was a safe and feasible ventilation mode for the majority of preterm infants suffering from RDS, but the traditional extubation criteria were not clinically applicable during NAVA. WHAT IS KNOWN • NAVA improves patient-ventilator synchrony during invasive ventilation. • Lower airway pressures and oxygen requirements are achieved with NAVA during invasive ventilation in preterm infants by comparison with conventional ventilation. What is new: • Infants suffering from PPHN did not tolerate NAVA in the acute phase of their illness. • The traditional extubation criteria relying on inspiratory pressures and spontaneous breathing efforts were not clinically applicable during NAVA.
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Stein H, Beck J, Dunn M. Non-invasive ventilation with neurally adjusted ventilatory assist in newborns. Semin Fetal Neonatal Med 2016; 21:154-61. [PMID: 26899957 DOI: 10.1016/j.siny.2016.01.006] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Neurally adjusted ventilatory assist (NAVA) is a mode of ventilation in which both the timing and degree of ventilatory assist are controlled by the patient. Since NAVA uses the diaphragm electrical activity (Edi) as the controller signal, it is possible to deliver synchronized non-invasive NAVA (NIV-NAVA) regardless of leaks and to monitor continuously patient respiratory pattern and drive. Advantages of NIV-NAVA over conventional modes include improved patient-ventilator interaction, reliable respiratory monitoring and self-regulation of respiratory support. In theory, these characteristics make NIV-NAVA an ideal mode to provide effective, appropriate non-invasive support to newborns with respiratory insufficiency. NIV-NAVA has been successfully used clinically in neonates as a mode of ventilation to prevent intubation, to allow early extubation, and as a novel way to deliver nasal continuous positive airway pressure. The use of NAVA in neonates is described with an emphasis on studies and clinical experience with NIV-NAVA.
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Affiliation(s)
- Howard Stein
- Neonatal Intensive Care Unit, Promedica Toledo Children's Hospital, Toledo, OH, USA; University of Toledo, Toledo, OH, USA
| | - Jennifer Beck
- Department of Pediatrics, University of Toronto, Toronto, Ontario, Canada; Institute for Biomedical Engineering and Science Technology (iBEST), Ryerson University and St Michael's Hospital, Toronto, Ontario, Canada; Keenan Research Centre for Biomedical Science, St Michael's Hospital, Toronto, Ontario, Canada
| | - Michael Dunn
- Department of Pediatrics, University of Toronto, Toronto, Ontario, Canada; Department of Newborn and Developmental Paediatrics, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada.
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Greenough A, Lingam I. Invasive and non-invasive ventilation for prematurely born infants - current practice in neonatal ventilation. Expert Rev Respir Med 2016; 10:185-92. [PMID: 26698269 DOI: 10.1586/17476348.2016.1135741] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Non-invasive techniques, include nasal continuous positive airways pressure (nCPAP), nasal intermittent positive pressure ventilation (NIPPV) and heated, humidified, high flow cannula (HHFNC). Randomised controlled trials (RCTs) of nCPAP versus ventilation have given mixed results, but one demonstrated fewer respiratory problems during infancy. Meta-analysis demonstrated NIPPV rather than nCPAP provided better support post extubation. After extubation or initial support HHFNC has similar efficacy to CPAP. Invasive techniques include those that synchronise inflations with the patient's respiratory efforts. Assist control/ synchronised intermittent mandatory ventilation compared to non triggered modes only reduce the duration of ventilation. Further data are required to determine the efficacy of proportional assist ventilation and neurally adjusted ventilatory assist. Other techniques aim to minimise volutrauma. RCTs of volume targeted ventilation demonstrated reductions in BPD and respiratory medication usage at follow-up. Prophylactic high frequency oscillatory ventilation does not reduce BPD, but is associated with superior lung function at school age.
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Affiliation(s)
- Anne Greenough
- a Division of Asthma, Allergy and Lung Biology, MRC & Asthma UK Centre in Allergic, Mechanisms of Asthma , King's College London , London , UK.,b NIHR Biomedical Research Centre , Guy's and St Thomas' NHS Foundation Trust and King's College London , London , UK
| | - Ingran Lingam
- c Neonatal Intensive Care Centre , King's College Hospital NHS Foundation Trust , London , UK
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Shetty S, Bhat P, Hickey A, Peacock JL, Milner AD, Greenough A. Proportional assist versus assist control ventilation in premature infants. Eur J Pediatr 2016; 175:57-61. [PMID: 26226891 DOI: 10.1007/s00431-015-2595-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 07/06/2015] [Accepted: 07/08/2015] [Indexed: 11/28/2022]
Abstract
UNLABELLED During proportional assist ventilation (PAV), the applied pressure is servo-controlled based on continuous input from the infant's breathing. In addition, elastic and resistive unloading can be employed to compensate for the abnormalities in the infant's lung mechanics. The aim of this study was to test the hypothesis that in very prematurely born infants remaining ventilated beyond the first week, PAV compared to assist control ventilation (ACV) would be associated with superior oxygenation. A randomised crossover study was undertaken. Infants were studied for 4 hours each on PAV and ACV in random order; at the end of each 4-h period, the oxygenation index (OI) was calculated. Eight infants, median gestational age of 25 (range 24-33) weeks, were studied at a median of 19 (range 10-105) days. It had been intended to study 18 infants but as all the infants had superior oxygenation on PAV (p = 0.0039), the study was terminated after recruitment of eight infants. The median inspired oxygen concentration (p = 0.049), mean airway pressure (p = 0.012) and OI (p = 0.012) were all lower on PAV. CONCLUSION These results suggest that PAV compared to ACV is advantageous in improving oxygenation for prematurely born infants with evolving or established BPD. WHAT IS KNOWN During proportional assist ventilation (PAV), the applied pressure is servo controlled throughout each spontaneous breath. Elastic and resistive unloading can compensate for the infant's abnormalities in lung mechanics. WHAT IS NEW In a randomised crossover study, infants with evolving/established BPD were studied on PAV and ACV each for 4 h. The oxygenation index was significantly lower on PAV in all infants studied.
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Affiliation(s)
- Sandeep Shetty
- Neonatal Intensive Care Centre, King's College Hospital, London, UK.
| | - Prashanth Bhat
- Division of Asthma, Allergy and Lung Biology, MRC Centre for Allergic Mechanisms in Asthma, King's College London, London, UK.
| | - Ann Hickey
- Neonatal Intensive Care Centre, King's College Hospital, London, UK.
| | - Janet L Peacock
- Division of Health and Social Care Research, King's College London, London, UK.
- NIHR Biomedical Research Centre at Guy's and St Thomas' NHS Foundation Trust and King's College London, London, UK.
| | - Anthony D Milner
- Division of Asthma, Allergy and Lung Biology, MRC Centre for Allergic Mechanisms in Asthma, King's College London, London, UK.
| | - Anne Greenough
- Division of Asthma, Allergy and Lung Biology, MRC Centre for Allergic Mechanisms in Asthma, King's College London, London, UK.
- NIHR Biomedical Research Centre at Guy's and St Thomas' NHS Foundation Trust and King's College London, London, UK.
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37
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Bancalari E, Claure N. Advances in respiratory support for high risk newborn infants. Matern Health Neonatol Perinatol 2015; 1:13. [PMID: 27057330 PMCID: PMC4823676 DOI: 10.1186/s40748-015-0014-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2014] [Accepted: 04/21/2015] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND A significant proportion of premature infants present with respiratory failure early in life and require supplemental oxygen and some form of mechanical respiratory support. FINDINGS Many technical advances in the devices for neonatal respiratory support have occurred in recent years and new management strategies have been developed and evaluated in this population. This article describes some of these novel methods and discusses their application and possible advantages and limitations. CONCLUSION Newer methods of respiratory support have led to marked improvement in outcome of premature infants with respiratory failure. Some of these strategies are very promising but further investigation to evaluate their short term efficacy and impact on long term respiratory and other relevant outcomes is needed before wider use.
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Affiliation(s)
- Eduardo Bancalari
- Division of Neonatology, Department of Pediatrics, University of Miami Miller School of Medicine, Miami, Florida USA
| | - Nelson Claure
- Division of Neonatology, Department of Pediatrics, University of Miami Miller School of Medicine, Miami, Florida USA
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