In vivo hemodynamic responses to thoracic artificial lung attachment

Carrie E. Perlman*, Keith E. Cook, Ralf Seipelt, Constantine Mavroudis, Carl L. Backer, Lyle F. Mockros

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

A thoracic artificial lung (TAL) was attached to the pulmonary circulation in a porcine model. Proximal main pulmonary artery (PA) blood flow, in part or whole, was diverted to the TAL, and TAL outlet blood flow was split between the distal main PA and left atrium (LA). The right ventricle (RV) drove blood flow through the combined TAL/natural lung (NL) pulmonary system. Selective banding placed the TAL in parallel with the NLs, in series with the NLs, or in an intermediary hybrid configuration. Parallel TAL attachment lowered pulmonary system impedance, raised cardiac output (CO), and provided the greatest TAL blood flow rate, but reduced the NL blood flow rate which is important for pulmonary embolic clearance and metabolic blood processing. Hybrid or series TAL attachment raised pulmonary system impedance, lowered CO, increased RV oxygen consumption, and reduced RV oxygen supply. Redesign of the PA anastomoses, TAL inlet graft, and TAL entrance and exit would significantly improve hemodynamics and RV function with TAL attachment. Mean LA pressure increased throughout the experiment, which may indicate damage caused by graft attachment to the LA. Pulmonary resistance-flow rate curves may enable clinical prediction of tolerable TAL attachment configurations.

Original languageEnglish (US)
Pages (from-to)412-425
Number of pages14
JournalASAIO Journal
Volume51
Issue number4
DOIs
StatePublished - Jul 2005

ASJC Scopus subject areas

  • Biophysics
  • Bioengineering
  • Biomaterials
  • Biomedical Engineering

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