The American journal of emergency medicine
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Mechanical ventilation is frequently initiated by emergency physicians. Further, the physician on duty in the emergency department is frequently responsible for evaluating ventilated patients who decompensate in the intensive care unit when other physicians are not present in the hospital. ⋯ Knowledge of the pathophysiology of acute respiratory failure and changes in lung physiology during positive pressure ventilation will aid the emergency physician in choosing an appropriate ventilator modality and initial settings to maximally benefit patients with respiratory insufficiency due to various causes. An appreciation of the adverse effects of mechanical ventilation and problems commonly encountered in patients on ventilators will prepare the emergency physician to rapidly assess and effectively manage the patient who deteriorates in this setting.
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Review Case Reports
Boerhaave's syndrome presenting with abdominal pain and right hydropneumothorax.
This case of Boerhaave's Syndrome had several unusual features including a delayed presentation and right-sided esophageal perforation. The patient's initial episode of hematemesis may have been caused by a small mucosal laceration in the area of the Barrett's lesion that later ruptured. On the other hand, if initially there was an esophageal rupture, it did not violate the parietal pleura or mediastinum. ⋯ The single most important test may be the upright chest X-ray. However, if it is normal, and there is a high index of suspicion, esophagograms and or chest CT may be required to demonstrate the lesion. Because survival is directly related to the time to diagnosis and treatment, a high clinical suspicion can decrease the substantial morbidity and mortality associated with Boerhaave's Syndrome.
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The objective was to determine whether children with a physician parent receive treatment different from that of children of nonphysician parents when they present to the emergency department (ED). The design was a retrospective cohort study. The setting was a university-affiliated children's hospital ED. ⋯ Compared with controls, the most junior member of the medical team seen by children of a physician parent was less likely to be a medical student (relative risk [RR] = 0.22) or a resident (RR = 0.71) and more likely to be an ED staff physician (RR = 1.52) or consultant (RR = 1.84). This trend was statistically significant (P = .002). The children of physician parents are more likely to see only an ED staff physician and/or consultant and less likely to see trainees than other children presenting to the pediatric ED.
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Comparative Study
Outcomes in severely ill patients transported without prehospital ALS.
Because of the debate regarding the impact of advanced life support (ALS) care on the outcome of prehospital patients, we monitored the influence of lack of sophisticated prehospital treatment in cases of severe illness arriving by ambulance to the emergency department (ED). A prospective cohort study to examine and compare the outcome of trauma- and nontrauma-induced "ALS-eligible" cases in the setting of no prehospital care was carried out from August 1, 1993 through May 31, 1994. On arriving at the ED, patients meeting the criteria for ALS cases and sent by EMS public prehospital personnel were assessed for subjective and objective status and change in severity by triage nurses as well as being followed up for neurological status until discharged from the hospital. ⋯ However, subgroup analysis showed that objective measures worsened in transit in nearly 18% of trauma victims, a rate nearly 3 times greater than that of medical cases. Moreover, neurological outcome was particularly poor in trauma cases. These results suggest that ALS care may be valuable for severely ill trauma victims.
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Bag-valve-mask (BVM) and oxygen-powered demand valve (OPDV) are two available adjuncts for artificial ventilation. Use of OPVDs has been limited by concern for causing or worsening pneumothorax. This study examined the effect of OPDV and BVM ventilation in swine with pneumothorax. ⋯ However, multiple comparisons showed no significant differences between OPDV and BVM at any time points. In this model, OPDV and BVM ventilation did not differ in their effects on pneumothorax volume or hemodynamic variables. No animal showed signs of tension pneumothorax.