Department of Orthopedics, West China Hospital, Sichuan University, Chengdu, China.
J Clin Monit Comput. 2010 Dec;24(6):407-12. doi: 10.1007/s10877-010-9262-0. Epub 2010 Nov 13.
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).
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.
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.
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.
肺动脉导管放置对于评估肺内分流量是必要的。本研究旨在探讨经食管超声心动图（TEE）在单肺通气（OLV）期间检测非通气肺区肺血流变化的可行性。
本研究纳入了 22 例择期行胸部手术的成年患者。在切换至右侧 OLV 前和 OLV 30 分钟期间的每 5 分钟，通过 TEE 获得左上肺静脉（LUPV）的多普勒血流模式。分别测量收缩峰速度（Vs）、舒张峰速度（Vd）和速度时间积分（VTI）。
右侧 OLV 5 分钟后，LUPV 血流模式的 VTI 显著降低。LUPV 血流的变化百分比在 OLV 5 分钟和 10 分钟时分别迅速下降了 78.4%和 67.7%，然后在 OLV 30 分钟时缓慢下降了 60%。
为测量 OLV 期间肺血流变化提供了一种替代方法。OLV 后，区域性肺血流的变化百分比立即下降，在 30 分钟 OLV 时下降 60%。
