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| | THE MERCK MANUAL, Sec. 16, Ch. 206, Cardiac And Respiratory Arrest And Cardiopulmonary Resuscitation |
 | | Complete respiratory arrest manifests clinically as absence of spontaneous ventilatory movement in an unconscious person, often with associated cyanosis, but it may develop acutely in a conscious victim secondary to foreign body obstruction (eg, café coronary). |
 | | Impending respiratory arrest is characterized by a depressed sensorium and feeble, gasping, or irregular respirations, often with accompanying tachycardia, diaphoresis, and relative hypertension due to agitation and CO accumulation. |
 | | Suspicion necessitates arterial blood gas analysis to confirm hypoxemia and hypercapnia (hypercarbia) because clinical estimation alone of the adequacy of ventilation is unreliable. |
| www.merck.com /mrkshared/mmanual/section16/chapter206/206b.jsp (224 words) |
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