Current concepts in acute respiratory support for neonates and children

Perspectives on Current Mechanical Ventilation Use and Training in Pediatric Critical Care Medicine Fellowship Programs in the United States

Mechanical ventilation (MV) is an integral part of the care of the critically ill child, and contemporary MV includes a myriad of sophisticated modalities that should be tailored to specific disease pathology and severity. This requires Pediatric Critical Care Medicine (PCCM) physicians to have comprehensive training and experience with various modes. We sought to assess and describe the current landscape of MV practices and training from PCCM fellowship programs. To describe current MV practices and training in PCCM fellowship programs and assess the different modes of MV to which trainees are exposed, a piloted survey was sent to all 67 American PCCM fellowship program directors (PDs) in 2019. Forty-eight (71.6%) of PCCM PDs responded. Our survey shows that PCCM fellows are not uniformly exposed to the same MV modalities, and PDs' perception of fellows' competency in managing MV is variable. Our results suggest that there is a lack of exposure to the various modes of “conventional” MV, as well as inconsistent education about less-utilized “nonconventional” MV. Additionally, we found that PDs are aware of their fellows' limited exposure to various modalities, as many practice patterns are institution specific. This study identified gaps in MV education and training and advocates for PCCM fellowship programs to identify these deficiencies to equip all trainees with a solid knowledge base that will prepare them to utilize any mode of MV in their future practice.

Implementation of neurally adjusted ventilatory assist and high flow nasal cannula in very preterm infants in a tertiary level NICU

Preterm infants treated with invasive ventilation are often affected by bronchopulmonary dysplasia, brain structure alterations, and later neurodevelopmental impairment. We studied the implementation of neurally adjusted ventilatory assist (NAVA) and high flow nasal cannula (HFNC) in a level III neonatal unit, and its effects on pulmonary and central nervous system outcomes. This retrospective cohort study included 193 surviving infants born below 32 weeks of gestation in preimplementation (2007-2008) and postimplementation (2016-2017) periods in a single study center in Finland. The proportion of infants requiring invasive ventilation decreased from 67% in the pre- to 48% in the postimplementation period (p = 0.009). Among infants treated with invasive ventilation, 68% were treated with NAVA after its implementation. At the same time, the duration of invasive ventilation of infants born at or below 28 weeks increased threefold compared with the preimplementation period (p = 0.042). The postimplementation period was characterized by a gradual replacement of nasal continuous positive airway pressure (nCPAP) with HFNC, earlier discontinuation of nCPAP, but a longer duration of positive pressure support. The proportion of normal magnetic resonance imaging (MRI) findings at term corrected age increased from 62% to 84% (p = 0.018). Cognitive outcome improved by one standard score between the study periods (p = 0.019). NAVA was used as the primary mode of ventilation in the postimplementation period. During this period, invasive ventilation time was significantly prolonged. HFNC led to a decrease in the use of nCPAP. The change in the respiratory support might have contributed to the improvement in brain MRI findings and cognitive outcomes.

Affordable, Compact and Infection-Free BiPAP Machine

Critical cases of COVID-19 require respiratory support provided primarily by mechanical ventilators. But, as per the current trend, about 15% of the cases require hospitalization and less than 5% cases are critical. Due to the massive number of COVID-19 cases all over the world, the ventilator requirement is increasing, and these traditional ventilators are quite expensive and are occupied for the critical cases, thus available in limited numbers. In this regard, BiPAP (Bilevel Positive Airway Pressure) ventilation support can be used for the less critical cases where patients do not require intubation by specialized staff and also minimizing the risk of infection during the procedure. The current article aims to deliver a design of an inexpensive BiPAP with an infection-free exhaust. BiPAP is a mode of ventilation which maintains positive pressure for air intake, and a low or zero pressure is created for expiration. The BiPAP suggested in the current article uses an air blower connected to an Arduino via a speed controller, the level of pressure and breathing rate are programmed in the Arduino, thus, the blower functions in BiPAP mode. The 3D printed mask proposed here comprises of a unique design for the intake and exhalation of air; and comprises of two sizes to fit all adults while avoiding any leakage. The design suggested is further tweaked for emergency use to support up to four patients using a single BiPAP. The mass production of the same would cost approx. INR 6500 or 85 USD.

To Bubble or Not? A Systematic Review of Bubble Continuous Positive Airway Pressure in Children in Low- and Middle-Income Countries

BACKGROUND

Bubble-continuous positive airway pressure (bCPAP) is a simple, low-cost ventilation therapy with the potential to lower morbidity and mortality in children in low- and middle-income countries (LMICs).

AIM

To examine (i) whether bCPAP is a safe and effective treatment for children in all age-groups presenting with respiratory distress from any cause, (ii) LMIC-implemented bCPAP devices including their technical specifications and costs and (iii) the setting and level of health care bCPAP has been implemented in.

METHOD

A systematic search was performed of Embase, PubMed and Web of Science. Inclusion criteria: bCPAP for children with respiratory distress in all age groups in LMICs. Database searches were performed up to 1 November 2018.

RESULTS

A total of 24 publications were eligible for the review. For neonates bCPAP was superior in improving survival and clinical progression compared with oxygen therapy and mechanical ventilation (MV). In two studies bCPAP was superior to low flow oxygen in reducing mortality in children 29 days to 13 months. Respiratory rate reductions were significant across all ages. Only three of six studies in children of all ages evaluated serious adverse events. In 12 studies comprising 1338 neonates treated with bCPAP, pneumothorax was reported 27 times. The majority of studies were carried out at tertiary hospitals in middle-income countries and 50% implemented the most expensive bCPAP-device.

CONCLUSION

In neonates and children below 13 months bCPAP is a safe treatment improving clinical outcomes and reducing the need for MV, without an increase in mortality. High-quality studies from non-tertiary settings in low-income countries are needed.

N-BiPAP vs n-CPAP in term neonate with respiratory distress syndrome

BACKGROUND

Non-invasive respiratory ventilation has greatly improved the evolution of respiratory distress in neonates, especially for preterm infants, but few studies have investigated the use of non-invasive ventilation (NIV) in term infants. It is useful for neonatologists and nurses to identify the optimal ventilation strategy in terms of effectiveness for this group of newborns. The aim of our study was to investigate what type of respiratory support between nasal Continuous Positive Airway Pressure (nCPAP) or nasal Biphasic Positive Airway Pressure (nBiPAP) is more effective in term neonates with RDS.

METHODS

Our study was a retrospective observational study of 78 full term neonates who were admitted to the NICU at S. Bambino Hospital from December 2015 to December 2016 for respiratory distress at birth. All patients underwent non-invasive ventilation by nCPAP or nBiPAP were included. Oxygen saturations and vital signs were monitored continuously. We evaluated blood gas analysis parameters before treatment and after 1 h of ventilation.

RESULTS

During the study period, there were 78 full term newborns admitted in our NICU for neonatal distress who were treated with nCPAP ore nBIPAP ventilation. In nBiPAP patients, we noticed a statistically significant reduction in PaCO2 levels and FiO2 requirement with respect to nCPAP patients, after 1 h of ventilation with a simultaneous significant increase of pH and PaO2 levels. There was no difference in the length of NIV and hospital stay. Among nCPAP patients, two were then intubated and one developed a pneumothorax.

CONCLUSION

The results of our study showed that an early BiPAP ventilation on RDS is the more efficient NIV because it improves CO2 removal and reduces FiO2 requirement in comparison to nCPAP. Future studies can clarify if early BiPAP ventilation on RDS is the more efficient of NIV.

Effects of underwater bubble CPAP on very-low-birth-weight preterm newborns in the delivery room and after transport to the neonatal intensive care unit

The development of less invasive ventilatory strategies in very-low-birth-weight (VLBW) preterm newborns has been a growing concern in recent decades. This study aimed to measure differences in the clinical progression of preterm newborns using two distinct periods in a university hospital: before and after using underwater bubble continuous positive airway pressure (ubCPAP). This is a retrospective study of VLBW preterm newborns with gestational ages less than or equal to 32 weeks admitted to the neonatal intensive care unit. The time series was divided into two groups: a pre-CPAP group ( n = 45) and a post-CPAP group ( n = 40). The post-CPAP group had fewer resuscitations, required fewer surfactant doses, spent fewer days on mechanical ventilation, and demonstrated less of a need for fraction of inspired oxygen > 30%. UbCPAP is an easy to use, minimally invasive, and effective ventilatory strategy for VLBW preterm newborns that can be used in environments with limited resources. Thus, adopting this simple strategy as part of a service organization and health policy can positively impact outcomes.