• G Graziani, M Buskermolen, S Oldani, and G Brambilla.
• Dipartimento di Medicina d'Urgenza, U.O. di Nefrologia e Dialisi, Istituto Clinico Humanitas IRCCS, Rozzano (MI). giorgio.graziani@humanitas.it
• G Ital Nefrol. 2006 May 1;23 Suppl 36:S13-21.

AbstractThe so-called systemic inflammatory response syndrome (SIRS ) represents the cellular inflammatory and neuroendocrine systemic reaction in response to many adverse events. epsis is defined as IR induced by bacterial, mycotic or viral toxins. The circulating toxins deriving from the bacterial wall can activate the septic cascade that induces many systemic reactions involving the activation of the cellular immunity, complement and coagulation system. The endothelial cell is the target of the systemic phlogistic reaction; its stimulation is followed by the production of many vasoactive paracrine and systemic agents. In this context, local and systemic cytokine production plays a major role in inducing the septic cascade, which although meant to be a phlogistic defense reaction, can often become an uncontrolled and dangerous inflammatory reaction. The sepsis-derived lesions can involve many organs and apparatus leading to the picture of sepsis syndrome. Sepsis syndrome often induces severe pulmonary lesions with a picture of acute respiratory distress syndrome (ARDS ). The combination of acute renal failure and sepsis is associated with a high mortality rate, namely in patients with a nitric oxide-induced systemic reduction in peripheral vascular resistances and septic shock. The toxinemia can also induce myocardial damage with a reduction in cardiac performance. Therefore, septic patients who have a combination of pulmonary, cardio-vascular, renal and cerebral lesions present with the picture of multiple organ dysfunction syndrome, that can increase mor-tality to > 0%.

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