Volume-targeted ventilation in the neonate: time to change?

Neonatal ethanol exposure from ethanol-based hand sanitisers in isolettes

OBJECTIVE

The aims of this study is to measure the ethanol vapours in the isolette after use of hands cleaned with ethanol-based hand sanitiser (EBHS).

METHODS

Two squirts (1.5 mL) of hand sanitiser were rubbed on hands for 10 or 20 s before inserting the hands in the isolette for 5 min. Ethanol vapours were measured in the isolette with photoionisation detector and alcohol breathalyser for 30 min.

RESULTS

Peak ethanol concentration in the isolette was considerably higher with a 10 s hand rub (381±192 ppm) compared with a 20 s hand rub (99±50 ppm), and dissipated to ≤5 ppm within 30 min. Under routine care, EBHS use by care providers exposes neonates in isolettes to 3.7-7.3 or 1.4-2.8 mg/kg ethanol per day with 10 or 20 s hand rubs, respectively. The expected blood level from average single exposure is 0.036 mg/dL with 10 s hand rub and may increase further with multiple exposures in a short period.

CONCLUSION

Preterm neonates in the isolette are at risk of inadvertent exposure to ethanol. The expected blood alcohol level from this exposure is small and below 1 mg/dL level recommended by European Medicines Agency to limit the ethanol exposure in children. The unintended ethanol exposure can be avoided by rubbing hands for at least 20 s after applying EBHS.

Early neonatal outcomes of volume guaranteed ventilation in preterm infants with respiratory distress syndrome

BACKGROUND

Volume guaranteed (VG) synchronized intermittent mandatory ventilation (SIMV) is a novel mode of SIMV that provides automatic adjustment of the peak inspiratory pressure for ensuring a minimum set tidal volume and there are limited data about the effects of VG ventilation on short term neonatal outcomes in preterm infants with respiratory distress syndrome (RDS).

OBJECTIVE

The main objective of this study was to evaluate the effect of VG ventilation on duration of ventilation and total supplemental oxygen. We also aimed to compare the early neonatal outcomes of VG ventilation versus conventional SIMV on short-term outcomes in preterm babies with RDS who were given surfactant.

METHODS

In this randomized controlled study, preterm infants who were admitted with RDS and given surfactant were divided into 2 groups: group 1 included infants ventilated on conventional SIMV (n = 30) and group 2 included infants ventilated on VG ventilation (n = 42). Neonatal morbidities such as air leak, bronchopulmonary dysplasia (BPD), intraventricular hemorrhage (IVH), retinopathy of prematurity (ROP), necrotizing enterocolitis (NEC) and duration of mechanical ventilation and total oxygen supplementation were all recorded.

RESULTS

There were no significant differences between two groups in terms of demographic features. Infants ventilated with VG mode had significantly shorter duration of ventilation and need of total supplemental oxygen. The incidences of oxygen related short term complications including BPD, ROP, and IVH were also significantly lower in these infants compared with those ventilated with conventional SIMV. No significant differences were found between two groups with respect to NEC and air leak.

CONCLUSION

In conclusion, VG ventilation in combination with surfactant treatment significantly reduced both duration of mechanical ventilation and early neonatal oxygen related morbidities including BPD, ROP and IVH in preterm infants with RDS. This data favors the use of VG ventilation in respiratory support of premature infants.

[Recommendations for respiratory support in the newborn]

The recommendations included in this document will be part a series of updated reviews of the literature on respiratory support in the newborn infant. These recommendations are structured into twelve modules, with modules 4, 5, and 6 presented here. Each module is the result of a consensus process of all members of the Surfactant and Respiratory Group of the Spanish Society of Neonatology. They represent a summary of the published papers on each specific topic, and of the clinical experience of each one of the members of the group. Each module includes a summary of the scientific evidence available, graded into 4 levels of recommendations.

Volume-targeted versus pressure-limited ventilation for preterm infants: a systematic review and meta-analysis

BACKGROUND

The causes of bronchopulmonary dysplasia (BPD) are multifactorial. Overdistension of the lung (volutrauma) is considered an important contribution. As an alternative to traditional pressure-limited ventilation (PLV), modern neonatal ventilators offer modes which can target a set tidal volume.

OBJECTIVES

To determine whether volume-targeted neonatal ventilation, compared with PLV, reduces death or BPD.

METHODS

We performed a systematic review and meta-analysis using the methodology of the Neonatal Review Group of the Cochrane Collaboration. A comprehensive literature search was undertaken, and data for prespecified outcomes were combined where appropriate using the fixed effects model.

RESULTS

Nine trials were eligible. Volume-targeted ventilation resulted in a reduction in: the combined outcome of death or BPD [typical relative risk, RR, 0.73 (95% confidence interval, 0.57-0.93), numbers needed to treat, NNT, 8 (95% CI 5-33)], the incidence of pneumothorax [typical RR 0.46 (95% CI 0.25-0.84), NNT 17 (95% CI 10-100)], days of ventilation [weighted mean difference 0.8 days (log-transformed data, p = 0.05)], hypocarbia (pCO(2) <35 mm Hg/4.7 kPa); [typical RR 0.56 (95% CI 0.33-0.96), NNT 4 (95% CI 2-25)], and the combined outcome of periventricular leukomalacia or grade 3-4 intraventricular hemorrhage [typical RR 0.48 (95% CI 0.28-0.84), NNT 11 (95% CI 7-50)].

CONCLUSIONS

Compared with PLV, infants ventilated using volume-targeted ventilation had reduced death/BPD, duration of ventilation, pneumothoraces, hypocarbia and periventricular leukomalacia/severe intraventricular hemorrhage. Further studies are needed to assess neurodevelopmental outcomes.