Abstract
Experimental models may help to understand the pathophysiology of septic shock. The aim of this study is to evaluate effects of different volumes of Lactate Ringer's solution (RL) on cardiovascular function and intestinal perfusion in experimental hypodynamic septic shock. Anesthetized, ventilated mongrel dogs (n = 21, 16.3 ± 1.9 kg) received an intravenous injection of 1.2 × 1010/kg cfu live Escherichia coli over 30 min (baseline–T30). Then, the animals were randomized to receive 16 ml/kg RL (n = 7), 32 ml/kg RL infused over a 30-min period or a control group (no fluid resuscitation, n = 7) (T60–T90). The animals were followed for 2 hours thereafter (T90–T210). Systemic hemodynamics were determined by arterial and pulmonary artery catheters. Portal and renal vein blood flows were measured with ultrasonic flowprobes. The PCO2 gap (gas tonometry), arterial and portal vein lactate levels were measured at each timepoint. The data are expressed as mean ± SEM. The different variables were analyzed by analysis of variance. Live E. coli injection in dogs promotes low cardiac output, systemic and regional lactic acidosis and severe splanchnic hypoperfusion. The RL solution promoted only modest and transient improvement in blood flows but not in systemic and regional acidosis. There were no differences between the resuscitated groups. Table 1
Highlights
Cardiac surgery with cardiopulmonary bypass (CPB) is a recognized trigger of systemic inflammatory response, usually related to postoperative acute lung injury (ALI)
The objective was to evaluate the characteristics of Chest pain (CP) in patients with acute aortic dissection (AAD) admitted in a chest pain unit (CPU)
Patients and methods We evaluated in a cross-sectional and prospective study patients admitted in a CPU, between March 1997 and May 2001, with diagnosis of AAD
Summary
Cardiac surgery with cardiopulmonary bypass (CPB) is a recognized trigger of systemic inflammatory response, usually related to postoperative acute lung injury (ALI). Few studies exist analysing the handling of acute respiratory insufficiency with invasive mechanical ventilation (IMV) and its correlation with mortality among the elderly intensive care unit (IUC) patient population. In Brazil, most patients with TBI are managed in general ICUs. The results of the treatment of patients admitted to nonspecialized ICUs must be compared with those obtained in neurosurgical ICUs. An acute confusional state (ACS) has been a frequent finding in patients undergoing cardiac surgery (CS), which, according to the literature, has resulted in a greater number of complications and in an increase in hospitalization and length of stay in the intensive care unit (ICU). The mortality of elderly patients who are admitted to intensive care units (ICU) has been the aim of some recent studies. Drugs that modulate such phenotypic alterations may be useful in the control of these and other clinical situations
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