A sedative/hypnotic drug is administered prior to electroconvulsive therapy to do which of the following?
(A) Potentiate the effect of succinylcholine
(B) Provide amnesia for the electrical stimulus
(C) Decrease the current required to produce a grand mal seizure
(D) Increase seizure duration
(E) Control postictal sympathetic response
B
During repair for coarctation of the aorta in a healthy 13-year-old patient, right radial artery pressure increases from 100/60 to 105/70 mmHg after the aorta is cross clamped. This most likely indicates that
(A) collateral blood flow has decreased the hemodynamic consequences of cross-clamping
(B) left ventricular hypertrophy has decreased left ventricular compliance
(C) spinal cord blood flow is impaired
(D) the coarctation has decreased aortic diameter less than 50%
(E) the coarctation involves the origin of the right subclavian artery
A 25-year-old woman is receiving magnesium sulfate for eclampsia at 36 weeks' gestation. Each of the following is a maternal effect of this treatment EXCEPT
(A) sedation
(B) sensitization to depolarizing muscle relaxants
(C) sensitization to nondepolarizing muscle relaxants
(D) decreased uterine blood flow
(E) loss of deep tendon reflexes prior to significant cardiac dysfunction
D
A 65-kg, 57-year-old man has an initial activated clotting time (ACT) of 122 seconds prior to elective cardiopulmonary bypass. Five minutes after administration of heparin 200 mg, ACT increases to 154 seconds. After two additional doses of 200 mg each from different lots, ACT increases to 240 seconds. The most appropriate next step is to
A patient is in sinus rhythm but has no pulse during cardiopulmonary resuscitation. There is marked resistance to positive pressure ventilation and breath sounds are difficult to hear bilaterally. The endotracheal tube is clearly in the trachea. The most appropriate next step in management is to
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