| Abstract | [Abstract] It is well documented that a pressure difference between central and peripheral arteries may occur following cardiopulmonary bypass (CPB), but how and when it occurs in each patient is still controversial. Accordingly, we evaluated the individual variation of the pressure difference between femoral and radial arteries accompanied by CPB. Sixteen adult patients undergoing coronary artery bypass graft surgery using mild hypothermic CPB were enrolled in this study. Both radial and femoral artery pressures were measured after induction of anesthesia, every 10 min during CPB, and 0, 10, 20, 30, and 60 min after CPB. When the difference for each blood pressure (systolic, mean, and diastolic) exceeded 10mmHg in any period before, during, or after CPB, the difference was defined as significant. We could assign the patients into three different groups depending on their variation of blood pressures : Groups A, B, and C. In Group A, none of systolic, mean, and diastolic femoral artery pressures exceeded corresponding radial artery pressures significantly at any time before, during, and after CPB. In Group B, femoral artery pressure became higher than radial artery pressure during CPB, and femoral artery pressure was not significantly lower than radial artery pressure after CPB. The patients in Group C showed no significant difference during CPB, but only systolic pressure of femoral artery became higher than that of radial pressure after CPB. In conclusion, our data demonstrated that the pressure difference accompanied by CPB was not uniform among the individual patients. Alteration of the pressure waveforms in each patient may indicate the feature of the difference, and may play a role in prediction of the difference. |
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