Dose dependency of outcomes of intrapleural fibrinolytic therapy in new rabbit empyema models.

The incidence of empyema (EMP) is increasing worldwide; EMP generally occurs with pleural loculation and impaired drainage is often treated with intrapleural fibrinolytic therapy (IPFT) or surgery. A number of IPFT options are used clinically with empiric dosing and variable outcomes in adults. To evaluate mechanisms governing intrapleural fibrinolysis and disease outcomes, models of Pasteurella multocida and Streptococcus pneumoniae were generated in rabbits and the animals were treated with either human tissue (tPA) plasminogen activator or prourokinase (scuPA). Rabbit EMP was characterized by the development of pleural adhesions detectable by chest ultrasonography and fibrinous coating of the pleura. Similar to human EMP, rabbits with EMP accumulated sizable, 20- to 40-ml fibrinopurulent pleural effusions associated with extensive intrapleural organization, significantly increased pleural thickness, suppression of fibrinolytic and plasminogen-activating activities, and accumulation of high levels of plasminogen activator inhibitor 1, plasminogen, and extracellular DNA. IPFT with tPA (0.145 mg/kg) or scuPA (0.5 mg/kg) was ineffective in rabbit EMP (n = 9 and 3 for P. multocida and S. pneumoniae, respectively); 2 mg/kg tPA or scuPA IPFT (n = 5) effectively cleared S. pneumoniae-induced EMP collections in 24 h with no bleeding observed. Although intrapleural fibrinolytic activity for up to 40 min after IPFT was similar for effective and ineffective doses of fibrinolysin, it was lower for tPA than for scuPA treatments. These results demonstrate similarities between rabbit and human EMP, the importance of pleural fluid PAI-1 activity, and levels of plasminogen in the regulation of intrapleural fibrinolysis and illustrate the dose dependency of IPFT outcomes in EMP.

[Iatrogenic pleuropneumonia as a complication of nutritional treatment of preterm-delivery newborn]. / Jatrogenna pleuropneumonia jako powiklanie leczenia zywieniowego u noworodka urodzonego przedwczesnie.

Our study presents a case of pleuropneumonia caused by a leak of nutritional formula to pleural cavity, which was caused by perforation of the oesophagus. The child was born in 28 hbd with 1400 g birth weight and was fed with mother's milk by a nasogastric tube. From day 11 of life general state of the neonate worsened and on chest X-ray the contrast showed leaking into the right pleural cavity and the end of gastric tube was seen in the right lung area. With this diagnosis the child was admitted to the University Hospital in Bydgoszcz. The child was conservatively treated and in two contrast X-ray examinations there was no pathology of the oesophagus. CT of chest showed pleural empyema which was repeatedly punctured. On the 19th day of hospitalization thoracotomy with resection of interior pulmomery lobe was performed. From the 14th day after surgery, the child was again enterally fed and in good general state. He was discharged on the 51st day of hospitalization. This case should pay our attention to the fact that respiratory distress syndrome of preterm-delivery newborns may be caused by iatrogenic proceedings not only infections and lack of surfactant. Some complications can be accomplished with the nutrition treatment in every dimension.

[Pleural empyema revealing osteopoikilosis]. / Pleurésie purulente révélatrice d'une ostéopoecilie.

INTRODUCTION: Osteopoikilosis is a rare, inherited and usually asymptomatic sclerosing bone dysplasia of unknown etiology which predominantly involves the appendicular and rarely the axial skeleton. CASE REPORT: We report the case of a 24 year old man who was hospitalized for pleural empyema and treated with antibiotics for six weeks in addition to pleural evacuation and physiotherapy. The diagnosis of osteopoikilosis associated with the pleural empyema was made on the radiological findings. In fact the chest X-Ray showed spherical areas of increased bone density in both humeral epiphyses. In order to explore these bone abnormalities further investigations were performed, including red and white blood cell counts, sedimentation rate and protein electrophoresis. There were no biological abnormalities. Radiography of the whole skeleton showed disseminated sclerotic lesions in the pelvis and the metacarpal and carpal bones of both hands. A neoplastic aetiology was excluded. In the light of these investigations, the diagnosis of osteopoikilosis was established. CONCLUSION: Widespread osteopoikilosis can be revealed on chest radiography.