Stable Control of Physiological Parameters, But Not Infection, in Preterm Lambs Maintained on Ex Vivo Uterine Environment Therapy

Yuichiro Miura, Haruo Usuda, Shimpei Watanabe, Eleanor Woodward, Masatoshi Saito, Gabrielle C. Musk, Suhas G. Kallapur, Shinichi Sato, Ryuta Kitanishi, Tadashi Matsuda, John P. Newnham, Sarah J. Stock, Matthew W. Kemp

研究成果: Article査読

8 被引用数 (Scopus)

抄録

Ex vivo uterine environment (EVE) therapy is an experimental neonatal intensive care strategy wherein gas exchange is performed by membranous oxygenators attached to the umbilical vessels. Our aim was to assess the ability of a newly refined EVE system to maintain key physiological parameters in preterm lambs within optimal ranges for 48 h. EVE group; n = 6: Preterm lambs were delivered under general anesthesia at 115 ± 2 days of gestational age. Animals were submerged in a bath of artificial amniotic fluid on EVE therapy for 48 h. Physiological parameters were monitored in real-time over the length of the experiment. Control group; n = 11: Ewes carrying a single fetus (115 ± 2 days of gestational age) underwent recovery surgery to allow placement of a fetal carotid artery catheter. Fetuses received an infusion of sterile saline only. After euthanasia, EVE and Control group fetuses underwent necroscopy to perform static pressure–volume curves and for sampling of lung and cord blood plasma for molecular analyses. Five out of six fetuses in the EVE group completed the study period with key physiological variables remaining within their respective reference ranges for the duration of the 48 h study. Bacteremia was identified in four out of five EVE fetuses, and was associated with a systemic inflammatory response. Using our refined EVE therapy platform, preterm lambs were maintained in a stable physiological condition for 48 h. These findings represent a significant advance over earlier work with this system; however, the identification of bacteremia and a fetal inflammatory response suggests that further refinement to the EVE therapy platform is required.

本文言語English
ページ(範囲)959-968
ページ数10
ジャーナルArtificial Organs
41
10
DOI
出版ステータスPublished - 2017 10

ASJC Scopus subject areas

  • Bioengineering
  • Medicine (miscellaneous)
  • Biomaterials
  • Biomedical Engineering

フィンガープリント 「Stable Control of Physiological Parameters, But Not Infection, in Preterm Lambs Maintained on Ex Vivo Uterine Environment Therapy」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。

引用スタイル