Circulation procedures

Hemolysis in extracorporeal circulation: relationship between time and procedures.

INTRODUCTION Extracorporeal circulation (EC) is very important in cardiac surgery but causes significant damage to the blood, including hemolysis. OBJECTIVE To quantify the rate of hemolysis at different times during EC in elective coronary artery bypass grafting. METHODS We measured rates of hemolysis of 22 patients at 6 different times during myocardial revascularization during EC: T0 - b...

Effects of scleral buckling and encircling procedures on human optic nerve head and retinochoroidal circulation.

AIMS To study the effects of segmental scleral buckling and encircling procedures on tissue circulation in the human optic nerve head (ONH) and choroid and retina. METHODS Using the laser speckle method, the normalised blur (NB) value, a quantitative index of tissue blood velocity, was measured every 0.125 seconds and averaged over three pulses in the optic nerve head (NB(ONH)) and choroid an...

Extending the time window for endovascular procedures according to collateral pial circulation.

BACKGROUND AND PURPOSE Good collateral pial circulation (CPC) predicts a favorable outcome in patients undergoing intra-arterial procedures. We aimed to determine if CPC status may be used to decide about pursuing recanalization efforts. METHODS Pial collateral score (0-5) was determined on initial angiogram. We considered good CPC when pial collateral score<3, defined total time of ischemia ...

EVects of scleral buckling and encircling procedures on human optic nerve head and retinochoroidal circulation

Aims—To study the eVects of segmental scleral buckling and encircling procedures on tissue circulation in the human optic nerve head (ONH) and choroid and retina. Methods—Using the laser speckle method, the normalised blur (NB) value, a quantitative index of tissue blood velocity, was measured every 0.125 seconds and averaged over three pulses in the optic nerve head (NBONH) and choroid and ret...

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