Differential detection of plasma hydroperoxides in sepsis.

Abstract:

OBJECTIVE:To determine whether plasma lipid hydroperoxides may be a useful marker for sepsis. DESIGN:Exploratory, open-label study. SETTING:Critical care unit at a university medical center. PATIENTS:Twelve patients with sepsis syndrome requiring hemodynamic monitoring with pulmonary artery catheters. Seven patients were diagnosed with pulmonary infections and five patients had intra-abdominal infections. INTERVENTIONS:Fatty acid hydroperoxide was measured in the fresh arterial plasma (radial artery) and mixed venous plasma (pulmonary artery) from each patient. Hydroperoxide was determined using a sensitive assay based on activating the cyclooxygenase reaction of prostaglandin H synthase. MEASUREMENTS AND MAIN RESULTS:The mean difference between the amount of fatty acid hydroperoxide measured in the plasma draining involved regions (arterial plasma for pulmonary sepsis, mixed venous plasma for intra-abdominal sepsis) compared with the paired, uninvolved regions was 0.45 +/- 0.14 microM (mean +/- SEM; p less than .005). CONCLUSIONS:Increased lipid hydroperoxides in blood-draining septic foci are markers of oxyradical release associated with severe infection, although they are not specific for infectious conditions, being released also from nonseptic regions of surgical trauma. Assays for hydroperoxides may be useful when relatively free of other tissue trauma.

journal_name

Crit Care Med

journal_title

Critical care medicine

authors

Keen RR,Stella L,Flanigan DP,Lands WE

doi

10.1097/00003246-199109000-00004

subject

Has Abstract

pub_date

1991-09-01 00:00:00

pages

1114-9

issue

9

eissn

0090-3493

issn

1530-0293

journal_volume

19

pub_type

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