alexa Plasma nitrate nitrite (NOx) is not a useful biomarker to predict inherent cardiopulmonary bypass inflammatory response.
Anesthesiology

Anesthesiology

Journal of Anesthesia & Clinical Research

Author(s): Viaro F, Baldo CF, Capellini VK, Celotto AC, Bassetto S,

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Abstract BACKGROUND AND AIM: There were strong evidences that nitric oxide has capital importance in the progressive vasodilatation associated with varied circulatory shock forms, including systemic inflammatory response syndrome (SIRS), in patients undergoing cardiac surgeries for cardiopulmonary bypass (CPB). If CPB procedures, per se, are the inciting stimulus for inflammation, plasma nitrate/nitrite (NOx) excretion would be expected to be higher in these patients rather than in patients operated without CPB. In consequence, we hypothesized that increased levels of NOx would be predictive for vasoplegic syndrome. METHODS: Thirty patients were assigned to three groups: Group 1--coronary artery bypass graft (CABG) roller pump CPB; Group 2--CABG centrifugal vortex pump CPB; and Group 3--heart valve surgery roller pump CPB. Sampling of venous blood for chemiluminescence plasma NOx dosage was achieved at the following time points: (1) before anesthesia induction; (2) after anesthesia induction; (3) before heparin infusion; (4) after heparin infusion; (5) CPB-30 minutes; (6) CPB-60 minutes; (7) before protamine infusion; (8) after protamine infusion; and (9) on return to the recovery area. RESULTS: There were no intergroup differences regarding age and anesthetic regimen, and the number of arteries grafted was not different between the CABG groups. There were no NOx statistic differences, neither among the three groups of patients or among the surgery time. In addition, there was no correlation among NOx, lactate, and hemoglobin. CONCLUSIONS: Considering the inflammatory process intrinsic to CPB, this study reinforces the idea that plasma NOx is not useful as a biomarker of inflammatory response onset, which may or may not lead to SIRS and/or vasoplegic syndrome. This article was published in J Card Surg and referenced in Journal of Anesthesia & Clinical Research

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