Jack J. Haitsma

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Mechanical ventilation practice has changed over the past few decades, with tidal volumes (VT) decreasing significantly, especially in patients with acute lung injury (ALI). Patients without acute lung injury are still ventilated with large--and perhaps too large--VT. Studies of ventilator-associated lung injury in subjects without ALI demonstrate(More)
Previous studies demonstrated that high-frequency oscillatory ventilation using the open lung concept (OLC) resulted in superior gas exchange and a reduction in ventilator-induced lung injury (VILI). We hypothesized that these beneficial effects could also be achieved by applying the OLC during positive pressure ventilation. After repeated(More)
BACKGROUND Preventing ventilator-associated lung injury (VALI) has become pivotal in mechanical ventilation of patients with acute lung injury (ALI) or its more severe form, acute respiratory distress syndrome (ARDS). In the present study we investigated whether plasma levels of lung-specific biological markers can be used to evaluate lung injury in(More)
RATIONALE Ventilator-induced lung injury (VILI) contributes to the mortality in patients with acute lung injury by increasing inflammation. Recent evidence suggests that stimulation of the cholinergic antiinflammatory pathway may be an attractive way to attenuate inflammatory injury. OBJECTIVES To determine the role of vagus nerve signaling in VILI and(More)
OBJECTIVES To review the involvement of coagulation and fibrinolysis in the pathogenesis of acute lung injury (ALI)/acute respiratory distress syndrome (ARDS), pulmonary infection, and ventilator-induced lung injury (VILI). DATA SOURCE Published articles on experimental and clinical studies of coagulation and fibrinolysis in ALI/ARDS, pneumonia, and(More)
Objectives: To determine the effect on compartmentalization of the tumor necrosis factor (TNF)-α response in the lung and systemically after ventilation with high peak inspiratory pressure with and without positive end-expiratory pressure (PEEP). Design and setting: Prospective, randomized, animal study in an experimental laboratory of a university.(More)
To investigate the effect of mechanical ventilation on alveolar fibrinolytic capacity. Randomized controlled animal study in 66 Sprague-Dawley rats. Test animals received intratracheal fibrinogen and thrombin instillations; six were killed immediately (fibrin controls), and the others were allocated to three ventilation groups (ventilation period: 225 min)(More)
Ventilator-induced lung injury is mediated, at least in part, by TNF-alpha. We determined the effect of a recombinant human soluble TNF receptor fusion protein (etanercept) on mechanical ventilation (MV)-induced changes in a murine ventilator-induced lung injury model. After pretreatment with etanercept or placebo, C57Bl/6 mice were anesthetized and(More)
Sepsis is a multifactorial, and often fatal, disorder typically characterized by widespread inflammation and immune activation with resultant endothelial activation. In the present study, we postulated that the adipokine adiponectin serves as a critical modulator of survival and endothelial activation in sepsis. To this aim, we evaluated both(More)
Background: Experimental studies on laparoscopic surgery are often performed in rats. However, the hemodynamic and respiratory responses related to the pneumoperitoneum have not been studied extensively in rats. Therefore, the aim of this study was to investigate in spontaneously breathing rats the effects of CO2 and helium, insufflation pressure, and(More)