Impact of mean arterial pressure on sublingual microcirculation during cardiopulmonary bypass-Secondary outcome from a randomized clinical trial

Microcirculation : the Official Journal of the Microcirculatory Society, Inc
Frederik HolmgaardLars S Rasmussen

Abstract

In this substudy of a randomized, clinical trial, we explored the sublingual microcirculation during cardiac surgery at 2 different levels of blood pressure. We hypothesized that a higher map during CPB would cause higher MFI. Thirty-six cardiac surgery patients undergoing CABG were included and randomized to either low (40-50 mm Hg) or high (70-80 mm Hg) MAP during CPB. SDF video images were recorded from the sublingual mucosa. Recordings were analyzed in a blinded fashion to quantify microcirculatory variables. MAP during CPB in the low target group was 45.0 mm Hg (SD: 5.3) vs 67.2 mm Hg (SD: 8.9) in the high target group. We found no significant difference between the 2 groups in MFI during CPB evaluated for AV: 2.91 vs 2.90 (P = .82). For sm AV (<20 μm), the corresponding values were 2.87 and 2.85 in the low and high target groups, respectively (P = .82). We found no significant difference in sublingual microcirculatory flow expressed as MFI according to 2 different levels of MAP during CPB.

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Citations

May 29, 2019·Current Opinion in Critical Care·Christian Jung
May 15, 2020·Critical Care : the Official Journal of the Critical Care Forum·Matthijs M den OsNicole A M Dekker

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