Resuscitation
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The effects of periodic Gz acceleration (pGz) on cardiovascular function and hemodynamics were determined in a pig model of acute cardiopulmonary resuscitation (CPR). The application of pGz (horizontal head-to-foot oscillations) at 2 Hz increased cardiac output in fibrillated animals proportional to the amplitude of the applied acceleration force that plateaued at 0.7 G. Cardiac output in fibrillating animals was restored to 20% of the values obtained before fibrillation with pGz-CPR and arterial blood gas values were normal during this period. ⋯ Arterial blood gases during the pGz-CPR and the ROSC periods were normal and not different from values obtained before fibrillation. None of the control animals (18 min of fibrillation without pGz-CPR) survived the experimental protocol and only two of these six animals briefly returned to spontaneous circulation (<20 min). In conclusion, experimental pGz-CPR produces cardiac output, capillary blood flow, and ventilation sufficient to maintain fibrillating animals for 18 min with ROSC for 2 h without support.
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In trauma management, the importance of early and effective control of the airway is acknowledged universally. Attention to the airway is particularly vital when a casualty has sustained serious head or facial injuries. ⋯ A case is described in which the intubating laryngeal mask airway (ILMA or LMA-Fastrach) was used successfully in the pre-hospital setting to secure the airway of a patient who had sustained serious head and facial injuries in a road traffic collision. The indications for the use of the ILMA in pre-hospital care are discussed.
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Comparative Study
Delayed platelet dysfunction in prolonged induced canine hypothermia.
Mild to moderate hypothermia (33-32 degrees C) is recognized as beneficial for brain protection after brain trauma. However, there are few experimental reports on hemostatic changes during prolonged hypothermia. We compared hemostatic changes during 72 h of mild to moderate hypothermia with data in normothermic dogs. ⋯ Long-term hypothermia induced platelet dysfunction, leading to decreased platelet aggregation and prolonged coagulation time (R and K times of TEG).
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The objective of this study was to analyze the functioning of the first two links of the chain of survival: 'access' and 'basic cardiopulmonary resuscitation (CPR)'. In a prospective study, all bystander witnessed circulatory arrests resuscitated by emergency medical service (EMS) personnel, were recorded consecutively. Univariate differences in survival were calculated for various witnesses, the performance of basic CPR, the quality of CPR, the performers of CPR and the delays. ⋯ The mere reporting that basic CPR has been performed does not describe adequately the actual value of basic CPR. The interval from collapse to initiation of basic CPR, and the training and experience of the performer must be taken into account. Policy makers for basic CPR training should focus on partners of the patients, who are most likely witness of an arrest.