OBJECTIVE: To monitor regional changes in end-expiratory lung volume (EELV), tidal volumes, and their ventilation distribution during different levels of nasal continuous positive airway pressure (nCPAP) and nasal biphasic positive airway pressure (BiPAP) in stable preterm infants. STUDY DESIGN: By using electrical impedance tomography and respiratory inductive plethysmography, we measured changes in EELV and tidal volumes in 22 preterm infants (gestational age 29.7 ± 1.5 weeks) during 3 nCPAP levels (2, 4, and 6 cmH2O) and unsynchronized BiPAP (nCPAP = 6 cmH2O; pressure amplitude = 3 cmH2O; frequency = 50/min; inspiration time = 0.5 seconds) at 10-minute intervals. We assessed the distribution of these volumes in ventral and dorsal chest regions by using electrical impedance tomography. RESULTS: EELV increased with increasing nCPAP with no difference between the ventral and dorsal lung regions. Tidal volume also increased, and a decrease in phase angle and respiratory rate was noted by respiratory induction plethysmography. At the regional level, electrical impedance tomography data showed a more dorsally oriented ventilation distribution. BiPAP resulted in a small increase in EELV but without changes in tidal volume or its regional distribution. CONCLUSION: Increasing nCPAP in the range of 2 to 6 cmH2O results in a homogeneous increase in EELV and an increase in tidal volume in preterm infants with a more physiologic ventilation distribution. Unsynchronized BiPAP does not improve tidal volume compared with nCPAP.
OBJECTIVE: To monitor regional changes in end-expiratory lung volume (EELV), tidal volumes, and their ventilation distribution during different levels of nasal continuous positive airway pressure (nCPAP) and nasal biphasic positive airway pressure (BiPAP) in stable preterm infants. STUDY DESIGN: By using electrical impedance tomography and respiratory inductive plethysmography, we measured changes in EELV and tidal volumes in 22 preterm infants (gestational age 29.7 ± 1.5 weeks) during 3 nCPAP levels (2, 4, and 6 cmH2O) and unsynchronized BiPAP (nCPAP = 6 cmH2O; pressure amplitude = 3 cmH2O; frequency = 50/min; inspiration time = 0.5 seconds) at 10-minute intervals. We assessed the distribution of these volumes in ventral and dorsal chest regions by using electrical impedance tomography. RESULTS: EELV increased with increasing nCPAP with no difference between the ventral and dorsal lung regions. Tidal volume also increased, and a decrease in phase angle and respiratory rate was noted by respiratory induction plethysmography. At the regional level, electrical impedance tomography data showed a more dorsally oriented ventilation distribution. BiPAP resulted in a small increase in EELV but without changes in tidal volume or its regional distribution. CONCLUSION: Increasing nCPAP in the range of 2 to 6 cmH2O results in a homogeneous increase in EELV and an increase in tidal volume in preterm infants with a more physiologic ventilation distribution. Unsynchronized BiPAP does not improve tidal volume compared with nCPAP.
Authors: Benjamin W Ackermann; Daniel Klotz; Roland Hentschel; Ulrich H Thome; Anton H van Kaam Journal: Pediatr Res Date: 2022-02-08 Impact factor: 3.756
Authors: Marlon E F Wilsterman; Pauline de Jager; Robert Blokpoel; Inez Frerichs; Sandra K Dijkstra; Marcel J I J Albers; Johannes G M Burgerhof; Dick G Markhorst; Martin C J Kneyber Journal: Ann Intensive Care Date: 2016-10-26 Impact factor: 6.925
Authors: Arjan B Te Pas; Stuart B Hooper; Tessa Martherus; Michelle K Croughan; Kelly J Crossley; Megan J Wallace; Erin V McGillick; Marta Thio; Charles C Roehr; James T Pearson; Katie Lee; Gary Ruben; Marcus J Kitchen Journal: Pediatr Res Date: 2021-07-22 Impact factor: 3.953