High Brain Tissue Oxygen Tension during Ventilation with 100% Oxygen after Fetal Asphyxia in Newborn Sheep.
(2009) In Pediatric Research Aug 13. p.57-61- Abstract
- The optimal FiO2 for newborn resuscitation is still not settled. We hypothesized that short-lasting oxygen ventilation after intrauterine asphyxia would not cause arterial or cerebral hyperoxia, and therefore be innocuous. The umbilical cord of fetal sheep was clamped and 10 min later, after delivery, ventilation with air (n=7) or with 100% oxygen for 3 (n=6) or 30 min (n=5), followed by air, was started. Among the eleven lambs given 100% O2, oxygen tension (PO2) was 10.7 (1.8 - 56) kPa [median (range)] in arterial samples taken after 2.5 min of ventilation. In those ventilated with 100% oxygen for 30 min, brain tissue PO2 (PbtO2) increased from less than 0.1 kPa in each lamb to individual maxima of 56 (30-61) kPa, while in those given... (More)
- The optimal FiO2 for newborn resuscitation is still not settled. We hypothesized that short-lasting oxygen ventilation after intrauterine asphyxia would not cause arterial or cerebral hyperoxia, and therefore be innocuous. The umbilical cord of fetal sheep was clamped and 10 min later, after delivery, ventilation with air (n=7) or with 100% oxygen for 3 (n=6) or 30 min (n=5), followed by air, was started. Among the eleven lambs given 100% O2, oxygen tension (PO2) was 10.7 (1.8 - 56) kPa [median (range)] in arterial samples taken after 2.5 min of ventilation. In those ventilated with 100% oxygen for 30 min, brain tissue PO2 (PbtO2) increased from less than 0.1 kPa in each lamb to individual maxima of 56 (30-61) kPa, while in those given oxygenfor just 3 min, PbtO2peaked at 4.2 (2.9 - 46) kPa. The maximal PbtO2 in air-ventilated lambs was 2.9 (0.8-5.4) kPa. Heart rate and blood pressure increased equally fast in the three groups. Thus, prolonged ventilation with 100% oxygen caused an increase in PbtO2of a magnitude previously only reported under hyperbaric conditions. Reducing the time of 100% oxygen ventilation to 3 min did not consistently avert systemic hyperoxia. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/1223213
- author
- Perez de Sá, Valéria LU ; Cunha Goncalves, Doris LU ; Nord, Anders LU ; Hansson, Stefan LU ; Larsson, Anders ; Ley, David LU ; Fellman, Vineta LU and Werner, Olof LU
- organization
- publishing date
- 2009
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Pediatric Research
- volume
- Aug 13
- pages
- 57 - 61
- publisher
- International Pediatric Foundation Inc.
- external identifiers
-
- wos:000261910700010
- pmid:18703995
- scopus:58149394846
- pmid:18703995
- ISSN
- 1530-0447
- DOI
- 10.1203/PDR.0b013e31818a01a4
- language
- English
- LU publication?
- yes
- id
- 65378652-04e7-470e-9978-15a2726ab1b4 (old id 1223213)
- alternative location
- http://www.ncbi.nlm.nih.gov/pubmed/18703995?dopt=Abstract
- date added to LUP
- 2016-04-04 07:12:06
- date last changed
- 2022-03-30 22:02:24
@article{65378652-04e7-470e-9978-15a2726ab1b4, abstract = {{The optimal FiO2 for newborn resuscitation is still not settled. We hypothesized that short-lasting oxygen ventilation after intrauterine asphyxia would not cause arterial or cerebral hyperoxia, and therefore be innocuous. The umbilical cord of fetal sheep was clamped and 10 min later, after delivery, ventilation with air (n=7) or with 100% oxygen for 3 (n=6) or 30 min (n=5), followed by air, was started. Among the eleven lambs given 100% O2, oxygen tension (PO2) was 10.7 (1.8 - 56) kPa [median (range)] in arterial samples taken after 2.5 min of ventilation. In those ventilated with 100% oxygen for 30 min, brain tissue PO2 (PbtO2) increased from less than 0.1 kPa in each lamb to individual maxima of 56 (30-61) kPa, while in those given oxygenfor just 3 min, PbtO2peaked at 4.2 (2.9 - 46) kPa. The maximal PbtO2 in air-ventilated lambs was 2.9 (0.8-5.4) kPa. Heart rate and blood pressure increased equally fast in the three groups. Thus, prolonged ventilation with 100% oxygen caused an increase in PbtO2of a magnitude previously only reported under hyperbaric conditions. Reducing the time of 100% oxygen ventilation to 3 min did not consistently avert systemic hyperoxia.}}, author = {{Perez de Sá, Valéria and Cunha Goncalves, Doris and Nord, Anders and Hansson, Stefan and Larsson, Anders and Ley, David and Fellman, Vineta and Werner, Olof}}, issn = {{1530-0447}}, language = {{eng}}, pages = {{57--61}}, publisher = {{International Pediatric Foundation Inc.}}, series = {{Pediatric Research}}, title = {{High Brain Tissue Oxygen Tension during Ventilation with 100% Oxygen after Fetal Asphyxia in Newborn Sheep.}}, url = {{http://dx.doi.org/10.1203/PDR.0b013e31818a01a4}}, doi = {{10.1203/PDR.0b013e31818a01a4}}, volume = {{Aug 13}}, year = {{2009}}, }