Journal of cardiothoracic and vascular anesthesia
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J. Cardiothorac. Vasc. Anesth. · Feb 2001
Comparative Study Clinical TrialComparison of two sites of inflow pressure measurement during retrograde cerebral perfusion.
To determine whether internal jugular venous valves influence inflow pressure during retrograde cerebral perfusion. ⋯ Internal jugular venous valves can obstruct retrograde cerebral perfusion inflow, manifest by an inflow pressure difference between the superior vena cava and internal jugular vein. In the presence of competent internal jugular venous valves, measurement of inflow pressure in the superior vena cava may be an inaccurate estimate of actual cerebral perfusion pressure. Internal jugular vein pressure should be monitored to avoid inadvertent cerebral hypoperfusion.
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J. Cardiothorac. Vasc. Anesth. · Feb 2001
Clinical TrialIntraoperative transesophageal ultrasonography can measure renal blood flow.
To determine the feasibility of acquiring Doppler-derived indices of renal blood flow by transesophageal ultrasonography in the perioperative period. ⋯ This study demonstrates the ability to acquire two-dimensional images of kidney and renal arterial Doppler velocities using transesophageal ultrasonography during cardiac surgery. Transesophageal renal arterial Doppler waveform analysis can follow changes in renal blood flow patterns secondary to interventional therapy.