Anesthesia Hub -

10 Random Questions

The Bain circuit

(A) provides nearly identical delivered and inspired anesthetic concentrations
(B) has the fresh gas flow inlet near the reservoir bag
(C) is a nonrebreathing circuit at any fresh gas flow rate
(D) is most efficient during spontaneous ventilation
(E) has a time constant greater than 1 minute for change in inspired anesthetic concentrations

BASIC Equipment & Physics

A 15-kg, 3-year-old child is anesthetized for an inguinal hernia repair with halothane and nitrous oxide. The trachea is intubated after administration of succinylcholine 30 mg. At the conclusion of the 45-minute procedure, the child is not breathing; a peripheral nerve twitch monitor indicates no response to a train-of-four stimulus. Further investigation is most likely to show

(A) abnormal response to nondepolarizing muscle relaxants
(B) a low dibucaine number
(C) a low plasma cholinesterase concentration
(D) an underlying myopathy
(E) a positive halothane-caffeine contracture test

ADVANCED Pharmacology & Pharmacokinetics Pediatric

In patients who have undergone cardiopulmonary bypass, administration of milrinone is most likely to result in an increase in which of the following?

(A) Arterial blood pressure
(B) Heart rate
(C) Pulmonary capillary wedge pressure
(D) Stroke volume
(E) Systemic vascular resistance

ADVANCED Cardiac

Which of the following EEG findings is expected during maintenance anesthesia with high-dose fentanyl (50 ju-g/kg), nitrous oxide, and oxygen?

(A) Low-frequency high-voltage activity
(B) Nondominant hemispheric slowing
(C) Predominant alpha activity
(D) Prominent beta activity
(E) Spindle-shaped bursts

During cardiopulmonary bypass at a nasopharyngeal temperature of 28°C and a hematocrit of 20%, temperature-corrected PaCO2 is 50 mmHg and uncorrected PaCO2 is 60 mmHg. The most appropriate management is to

(A) administer additional opioid
(B) administer packed red blood cells to increase hematocrit to 25%
(C) further decrease the patient's temperature
(D) increase fresh gas flow to the oxygenator
(E) institute mechanical ventilation

ADVANCED Cardiac

A patient with moderate hypothyroidism and unstable angina requires urgent coronary artery bypass grafting. Which of the following is most appropriate before proceeding with the operation?

(A) Initiation of epinephrine infusion
(B) Intramuscular administration of a barbiturate
(C) Intravenous administration of triiodothyronine (T3)
(D) Intravenous administration of thyroxine (T4)
(E) Treatment of myocardial ischemia

ADVANCED General

Which of the following factors causes a decrease in mixed venous oxygen saturation?

(A) Arteriovenous fistula
(B) Decreased hemoglobin concentration
(C) Decreased oxygen consumption
(D) Increased cardiac output
(E) Nitroprusside toxicity

BASIC Respiratory & Critical Care

Compared with the adult airway, the neonatal airway has which of the following characteristics?

(A) More cephalad larynx
(B) Narrowest diameter at the vocal cords
(C) Relatively smaller epiglottis
(D) Smaller tongue relative to the size of the oral cavity
(E) Vocal cords perpendicular to the trachea

ADVANCED Pediatric

Optimal ventilation of a newborn with congenital diaphragmatic hernia should consist of

(A) PaCO2 30 mmHg, low tidal volumes
(B) PaCO2 30 mmHg, high tidal volumes
(C) PaCO2 40 mmHg, low tidal volumes
(D) PaCO2 40 mmHg, high tidal volumes
(E) PaCO2 45 mmHg, low tidal volumes

ADVANCED Pediatric

A 70-kg man with ischemic heart disease is undergoing abdominal aortic aneurysm resection. At the time of infrarenal cross-clamping, 0.2-mV ST-segment depression appears on lead V5 of the ECG. Hemodynamic changes occurring at the same time are shown below. Systemic blood pressure 90/50 --> 150/90; Heart rate 80 --> 95; PAp 20/10 --> 45/24; Mean pulmonary artery occlusion pressure (mmHg) 10 --> 23; Cardiac output (L/min) 4.5 --> 3.2. Ischemia would be decreased by restoring the pre-clamp level of each of the following EXCEPT

(A) blood pressure
(B) heart rate
(C) pulmonary artery pressure
(D) pulmonary artery occlusion pressure
(E) cardiac output

ADVANCED General