Jennifer Anne Dawson

Learn More
OBJECTIVE The goal was to define reference ranges for pulse oxygen saturation (Spo(2)) values in the first 10 minutes after birth for infants who received no medical intervention in the delivery room. METHODS Infants were eligible if a member of the research team was available to record Spo(2) immediately after birth. Infants were excluded if they(More)
AIM The aim was to compare resuscitators' estimates of tidal volume (V(T)) and face mask leak with measured values during positive pressure ventilation (PPV) of newborn infants in the delivery room. PATIENTS AND METHODS The authors measured inflating pressures and V(T) delivered using a respiratory function monitor, and calculated face mask leak. After 60(More)
There is limited data describing how preterm and term infants breathe spontaneously immediately after birth. We studied spontaneously breathing infants >or=29 wk immediately after birth. Airway flow and tidal volume were measured for 90 s using a hot wire anemometer attached to a facemask. Twelve preterm and 13 term infants had recordings suitable for(More)
INTRODUCTION Preterm infants with inadequate breathing receive positive pressure ventilation (PPV) by mask with variable success. The authors examined recordings of PPV given to preterm infants in the delivery room for prevalence of mask leak and airway obstruction. METHODS AND PATIENTS The authors reviewed recordings of infants at <32 weeks' gestation(More)
OBJECTIVE To investigate whether using a respiratory function monitor (RFM) during mask resuscitation of preterm infants reduces face mask leak and improves tidal volume (V(T)). STUDY DESIGN Infants receiving mask resuscitation were randomized to have the display of an RFM (airway pressure, flow, and V(T) waves) either visible or masked. RESULT(More)
BACKGROUND Positive pressure ventilation (PPV) via a face mask is an important skill taught using manikins. There have been few attempts to assess the effectiveness of different face mask designs. AIM To determine whether leak at the face mask during simulated neonatal resuscitation differed between a new round mask design and the current most widely used(More)
BACKGROUND Self-inflating bags are used to provide ventilation during neonatal resuscitation. However, they cannot provide positive end expiratory pressure (PEEP) unless a PEEP valve is attached. The ability of Laerdal neonatal self-inflating bags fitted with PEEP valves to reliably deliver PEEP is unclear. The aim of this study was to measure the delivered(More)
We have critically examined the nude mouse model for human retinoblastoma to determine whether or not characteristics found in the parent tumor are retained in the mouse. We have demonstrated that most tumors grown in the anterior chamber of the nude mouse maintain a similar karyotype, show the same degree of differentiation and develop an adequate tumor(More)
BACKGROUND Because of concerns about harmful effects of 100% oxygen on newborn infants, air has started to be used for resuscitation in the delivery room. OBJECTIVE To describe changes in preductal oxygen saturation (Spo(2)) and heart rate (HR) in the first 10 min after birth in very preterm infants initially resuscitated with 100% oxygen (OX(100)) or air(More)
OBJECTIVE The precision of oxygen saturation (SpO2) targeting in preterm infants on continuous positive airway pressure (CPAP) is incompletely characterized. We therefore evaluated SpO2 targeting in infants solely receiving CPAP, aiming to describe their SpO2 profile, to document the frequency of prolonged hyperoxia and hypoxia episodes and of fraction of(More)