Minerva anestesiologica
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Minerva anestesiologica · Jun 2005
ReviewNeurologic deficit after peripheral nerve block: what to do?
Regional nerve injury is a recognized complication of plexus anesthesia. Nerve damage after regional anesthesia is the most frightening complication for the patient, the anesthetist and the surgeon too. ⋯ The principles to avoid anesthetic-related nerve damage during regional anesthesia are given. Finally treatment and surveillance, after nerve damage has occurred, are explained.
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Patients with chronic airflow obstruction and difficult weaning from mechanical ventilation are at increased risk for intubation-associated complications and mortality because of prolonged invasive mechanical ventilation. Non-invasive positive-pressure ventilation (NPPV) may revert most of the pathophysiologic mechanisms associated with weaning failure in these patients. Several randomised controlled trials have shown that the use of NPPV in order to advance extubation in difficult to wean patients can result in reduced periods of endotracheal intubation, complication rates and survival. ⋯ In addition the patients were haemodynamically stable, with a normal level of consciousness, no fever and a preserved cough reflex. It remains to be seen whether NPPV has a role in other patients' groups and situations. The technique is however a usual addition to the therapeutic armamentarium for a group of patients who pose a significant clinical and economic challenge.
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Protein C (PC) is a plasma glycoprotein implicated in modulating coagulation and inflammation. Its levels decrease in sepsis and related diseases, where it has also proved to be a prognostic indicator of outcome. Infusion of exogenous PC, although not able to decrease mortality in severe sepsis and septic shock, can safely resolve the coagulation imbalances related to these pathological states. ⋯ Although PC is included in guidelines for management of severe sepsis and septic shock, only 38%, of observed patients received PC treatment. Even in the treated group, patients received a lower dosage of PC, and for a shorter period, than recommended. In accordance to previous studies, we did not observe differences in mortality between treated and untreated patients. Our results showed a significant increase in plasma PC activity, following infusion of PC concentrate. This increase in PC appeared sufficient to restore some, but not all, of the abnormalities in the coagulation system. A large randomized, phase 3, placebo-controlled trial in children with severe sepsis and septic shock is advisable to establish effective role of therapy with PC in reducing mortality of these patients.