J Clin Monit Comput - The changes of pulmonary blood flow in non-ventilated lung during one lung ventilation.

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Resumo

JECTIVE: A pulmonary artery catheter placement is necessary for intrapulmonary shunt fraction evaluation. The purpose of this study was to investigate the feasibility for detecting the changes of regional pulmonary blood flow in non-ventilated lung by transesophageal echocardiography (TEE) during one-lung ventilation (OLV).METHODS: 22 adult patients for selective thoracic surgery were enrolled in the study. Doppler flow patterns in left upper pulmonary vein (LUPV) were obtained by TEE before switching to right OLV and every 5 min in 30 min OLV period. Systolic peak velocity (Vs), diastolic peak velocity (Vd) and velocity time integral (VTI) were measured respectively.RESULTS: The VTI of LUPV blood flow pattern decreased significantly 5 min after right OLV. The percent of changes in LUPV blood flow decreased rapidly by 78.4 and 67.7% at OLV 5 min and 10 min, respectively. Then it slowly decreased by 60% at OLV 30 min.CONCLUSIONS: Provides an alternative method to measure the changes of pulmonary blood flow during OLV. The percent changes of regional pulmonary blood flow decreased immediately after OLV, and decreased by 60% at 30 min OLV.

Resumo Limpo

jectiv pulmonari arteri cathet placement necessari intrapulmonari shunt fraction evalu purpos studi investig feasibl detect chang region pulmonari blood flow nonventil lung transesophag echocardiographi tee onelung ventil olvmethod adult patient select thorac surgeri enrol studi doppler flow pattern left upper pulmonari vein lupv obtain tee switch right olv everi min min olv period systol peak veloc vs diastol peak veloc vd veloc time integr vti measur respectivelyresult vti lupv blood flow pattern decreas signific min right olv percent chang lupv blood flow decreas rapid olv min min respect slowli decreas olv minconclus provid altern method measur chang pulmonari blood flow olv percent chang region pulmonari blood flow decreas immedi olv decreas min olv

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