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N-Acetylcysteine's Role in Sepsis and Potential Benefit in Patients With Microcirculatory Derangements

Jason Chertoff
Journal of Intensive Care Medicine 2018, 33 (2): 87-96

OBJECTIVE: To review the data surrounding the utility of N-acetylcysteine (NAC) in sepsis and identify areas needed for additional research.

DATA SOURCES: A review of articles describing the mechanisms of action and clinical use of NAC in sepsis.

SUMMARY OF REVIEW: Despite many advances in critical care medicine, still as many as 50% of patients with septic shock die. Treatments thus far have focused on resuscitation and restoration of macrocirculatory targets in the early phases of sepsis, with less focus on microcirculatory dysfunction. N-acetylcysteine, due to its anti-inflammatory and antioxidative properties, has been readily investigated in sepsis and has yielded largely incongruous and disappointing results. In addition to its known anti-inflammatory and antioxidative roles, one underappreciated property of NAC is its ability to vasodilate the microcirculation and improve locoregional blood flow. Some investigators have sought to capitalize on this mechanism with promising results, as evidenced by microcirculatory vasodilation, improvements in regional blood flow and oxygen delivery, and reductions in lactic acidosis, organ failure, and mortality.

CONCLUSION: In addition to its antioxidant and anti-inflammatory properties, N-acetylcysteine possesses vasodilatory properties that could benefit the microcirculation in sepsis. It is imperative that we investigate these properties to uncover NAC's full potential for benefit in sepsis.


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