A 70-kg, 47-year-old man is undergoing a repeat coronary artery bypass graft. Following sternotomy, administration of heparin 300 units/kg for anticoagulation increases the activated coagulation time from a baseline of 135 sec to 210 sec. This finding is compatible with
A full-term neonate has physical findings suggestive of congenital diaphragmatic hernia. Initial Apgar score is 2. Which of the following is the most appropriate initial management?
(A) Placement of an orogastric tube
(B) Insertion of a chest tube
(C) Controlled ventilation by face mask
(D) Controlled ventilation through an endotracheal tube
(E) Spontaneous ventilation through an endotracheal tube
If the oxygen supply pressure of an anesthesia machine exceeds a set value, which of the following safety devices maintains a constant oxygen flowmeter output?
(A) Cylinder pressure regulator
(B) Fail-safe valve
(C) Flow-control valve
(D) Pipeline inlet check valve
(E) Second-stage regulator
E
A patient receiving propranolol and nifedipine is scheduled for elective coronary artery bypass surgery. During induction with fentanyl and oxygen, heart rate decreases from 52 to 36 bpm and blood pressure decreases from 130/85 to 80/50 mmHg. Administration of atropine 2 mg intravenously has no effect. The most appropriate treatment at this time is administration of
A woman is in labor at 40 weeks' gestation and the fetus is in breech presentation. Which of the following will provide adequate uterine relaxation for vaginal delivery?
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 69-year-old man is confused and agitated one hour after preoperative intramuscular administration of scopolamine for awake fiberoptic laryngoscopy. SpO2 measured by pulse oximetry is 97%. Which of the following drugs is most appropriate for treatment of the change in mental status?