During cardiopulmonary resuscitation (CPR) in an adult, external chest compression is being performed at the rate of 90/min with 2 inches of sternal depression and a compression-relaxation ratio of 20:80. The most appropriate action is to
Diffuse microvascular bleeding is noted in a patient who has received 25 units of whole blood for a liver resection. Platelet count is 40,000/mm3, prothrombin time is 18 sec, activated partial thromboplastin time is 54 sec, and serum fibrinogen concentration is 60 mg/dl. The most likely cause of the bleeding is
When evaluating a screening test, which of the following is the most appropriate term for the proportion of patients with a disease who have a positive test result?
Following a thyroidectomy, a patient develops severe dyspnea, inspiratory stridor, and cyanosis in the recovery room. On physical examination, the neck appears full. Attempts at bag-mask ventilation are unsuccessful. Immediate therapy is to
(A) administer calcium chloride
(B) perform an emergency tracheostomy
(C) open the wound and institute bag-mask ventilation
(D) return the patient to the operating room
(E) perform endotracheal intubation
C
Each of the following is a physiologic effect of intra-aortic balloon pump therapy EXCEPT