Anesthesia Hub -

10 Random Questions

Which of the following is most effective in decontaminating an anesthesia machine that was splattered with HIV-contaminated blood?

(A) Bleach
(B) Deionized water
(C) Ethylene oxide
(D) Hydrogen peroxide
(E) Isopropyl alcohol

BASIC Equipment & Physics

An 88-kg man is anesthetized with 66% nitrous oxide, 33% oxygen, and 1% isoflurane using a circle system. Following tracheal intubation, the nitrous oxide flow is set at 1 L/min and the oxygen flow is set at 0.5 L/min. After two hours the oxygen monitor indicates a circuit oxygen concentration of only 25% despite the flows noted above. The most likely explanation for this discrepancy is

(A) decrease of oxygen pipeline pressure to 20 psi
(B) increase in the concentration of nitrous oxide in the circuit
(C) inaccuracy of flowmeters at low flow rates
(D) malfunction of the oxygen monitor
(E) progressive hypothermia

BASIC Equipment & Physics

Each of the following is an effect of intravascular radiographic contrast media EXCEPT

(A) altered protein binding of anesthetic drugs
(B) bronchospasm
(C) increased systemic vascular resistance
(D) pulmonary edema
(E) seizures

ADVANCED Regional & Pain

A 50-year-old man with an 80 pack-year history of cigarette smoking has a forced expiratory volume in one second of 1.5 L and a forced vital capacity of 3.5 L. Which of the following statements concerning intraoperative anesthetic management is true?

(A) An I:E ratio of 1:1 will improve carbon dioxide removal more than an I:E ratio of 1:2.5
(B) Antagonism of neuromuscular block will most likely trigger acute bronchospasm
(C) Functional residual capacity will increase during an acute exacerbation of bronchospasm
(D) Induction with ketamine will increase airway resistance
(E) Nitrous oxide is contraindicated

BASIC Respiratory & Critical Care

Which of the following statements best describes testing for susceptibility to malignant hyperthermia (MH)?

(A) Live skeletal muscle cells are required for testing
(B) The MH gene is located on the X chromosome
(C) Muscle biopsy is appropriate in children younger than 1 year
(D) A normal serum creatine phosphokinase concentration eliminates the need for muscle biopsy
(E) Succinylcholine is used to stimulate muscle obtained on biopsy for MH

ADVANCED General

Each of the following conditions is associated with upregulation of the acetylcholine receptor at the neuromuscular junction EXCEPT

(A) burn injuries
(B) myasthenia gravis
(C) prolonged bed rest
(D) prolonged use of neuromuscular relaxants
(E) upper motor neuron injury

BASIC Pharmacology & Pharmacokinetics

Each of the following is a complication of celiac plexus block with 0.5% lidocaine 40 ml EXCEPT

(A) hematuria
(B) ileus
(C) postural hypotension
(D) retroperitoneal hematoma
(E) weakness of hip flexors

ADVANCED Regional & Pain

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

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

Which of the following is the most likely cause of the coronary steal phenomenon?

(A) Idiopathic hypertrophic subaortic stenosis (IHSS)
(B) Decreased cardiac contractility
(C) Dilation of coronary arterioles
(D) Dilation of epicardial coronary arteries
(E) Increased systemic vascular resistance

ADVANCED Cardiac