Shock : molecular, cellular, and systemic pathobiological aspects and therapeutic approaches : the official journal the Shock Society, the European Shock Society, the Brazilian Shock Society, the International Federation of Shock Societies
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Tumor necrosis factor (TNF) plays a well known role during the development of multiple organ failure, in part due to its role for the expression of adhesion molecules on endothelial cells, thereby contributing to inflammatory reactions. The purpose of this study was to investigate the effects of TNF on leukocyte-endothelial interactions in the liver as a key organ during the systemic inflammatory response syndrome. In Sprague-Dawley rats (n = 6/group) hemorrhagic shock was induced by reduction of the mean arterial blood pressure (MAP) to 40 mmHg for 45 min; resuscitation was initiated by retransfusion of shed blood (60%) and Ringer's lactate. ⋯ Significant differences were observed particularly in respect to permanent adherent leukocytes with 31.8 +/- 4.7% in the shock/NaCl group and 20.7 +/- 2.6% (mean +/- S. E., p < .05) in the shock/TN3 group 5 h after resuscitation following hemorrhagic shock. Consistently higher adhesion rates were observed in the portal regions compared to pericentral regions of the liver lobules.(ABSTRACT TRUNCATED AT 250 WORDS)
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7.5% NaCl/6% dextran-70 (HSD) has been shown to be an effective, small volume resuscitation fluid following hemorrhage (HEM) in euhydrated (E) sheep. However, there is controversy whether hypertonic solutions would be effective in dehydrated (D) animals. Therefore, we used two groups (E and 4 days D) of chronically instrumented ewes to evaluate the responses to HSD following HEM. ⋯ HR increased further following HSD (E, 143 +/- 11; D, 158 +/- 5). PNa was raised 10 and 16 mEq/L in the E and D sheep, respectively, following HSD infusion, but no adverse effects associated with elevated PNa were observed in either group. Thus, HSD was effective in restoring MAP, CO, and TPR to baseline values in D sheep but it was at the expense of a lower SV and a higher HR than in E sheep.
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Editorial Review
Multiple organ failure, multiple organ dysfunction syndrome, and the systemic inflammatory response syndrome-where do we stand?
Multiple organ failure, multiple organ dysfunction syndrome, and the systemic inflammatory response syndrome are problems of medical progress and intensive care units (ICUs) and require prevention of organ failure through excellent patient care. New concepts in prevention include: 1) the need to improve microcirculatory blood flow (Mbf) early after injury or illness, 2) stopping or controlling injury or infection by early definitive operation when necessary, 3) a zero defect operation is necessary, 4) necrotic tissue and an overwhelming inflammatory burden are problems and should be lessened when possible, 5) adequate resuscitation to improve Do2, Vo2, and organ blood flow is necessary, 6) supporting metabolism and the GI tract may decrease complications of injury and sepsis, 7) support of host defense and/or immunomodulation to decrease the incidence of sepsis, and 8) treating the patient and the illness or injury, not just the mediators. Experimental evidence in animals and human volunteers for concepts, mechanisms, and treatment of injury or illness can be substantial and persuasive, but it may be difficult to demonstrate efficacy in sick patients. ⋯ A single magic bullet for complex and diverse illnesses is not likely to appear or to be successful. In this review it was not possible to describe many of the observations and recommendations in this immense and complex field. I apologize to those whose work I have inadvertently not included.
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Comparative Study
The effects of plasma and albumin infusion on organ function and sepsis markers in experimental gram-negative sepsis.
To study the effects of early plasma versus albumin infusion on vital organ function and the appearance of central sepsis mediators in septic shock, three groups of anesthetized piglets (n = 28) were inoculated with live Eschericia coli. Group I received fresh frozen plasma, group II received albumin, whereas group III served as nontreated septic controls. Plasma-treated animals exhibited improved survival (p < .02) compared with controls, and improved organ function compared with both controls and albumin-treated animals. ⋯ Following albumin infusion TNF levels decreased to baseline values (p < .01), whereas endotoxin and TCC levels did not change significantly. Our study shows a beneficial effect of early plasma infusion on survival and vital organ function in septic animals. The effect of plasma infusion on circulating levels of endotoxin, TNF, and TCC may be potentially deleterious in uncompensated stages of septic shock.