Anesthesia Hub -

10 Random Questions

A child has tachypnea immediately after reintubation for intractable laryngospasm. Oxygen saturation is 78% at an FiO2 of 1.0. A radiograph of the chest taken 15 minutes later is most likely to show

(A) bilateral pleural effusions
(B) diffuse homogenous pulmonary infiltrates
(C) patchy central infiltrates of the right upper lobe
(D) pneumothorax
(E) segmental atelectasis at both lung bases

ADVANCED Respiratory & Critical Care Pediatric

Which of the following is most responsible for the duration of action of local anesthetics?

(A) Concentration
(B) Metabolism
(C) Molecular weight
(D) Tissue protein binding
(E) Volume injected

BASIC Pharmacology & Pharmacokinetics Regional & Pain

Inhalation induction of anesthesia is more rapid in a 6-month-old infant than in an adult because infants have

(A) greater ratio of alveolar ventilation to functional residual capacity
(B) greater ratio of blood volume to body weight
(C) greater solubility of anesthetic in blood
(D) lower anesthetic requirement
(E) lower distribution of cardiac output to vessel-rich organs

ADVANCED Pharmacology & Pharmacokinetics Pediatric

During surgery with a carbon dioxide laser, which inhaled gas mixture is LEAST likely to promote combustion of the endotracheal tube?

(A) Oxygen 25%-helium 75%
(B) Oxygen 25%-nitrogen 75%
(C) Oxygen 25%-nitrous oxide 75%
(D) Oxygen 50%-nitrogen 50%
(E) Oxygen 50%-nitrous oxide 50%

BASIC Equipment & Physics

A 26-year-old woman has persistent uterine bleeding following a normal spontaneous delivery without anesthesia. The uterus is firm on manual examination. Which of the following anesthetics is most appropriate for manual extraction of the placenta?

(A) Halothane
(B) Pudendal block with lidocaine
(C) Subarachnoid tetracaine
(D) Thiopental
(E) Vecuronium

Which of the following situations is most likely related to paraplegia following repair of a descending thoracic aortic aneurysm?

(A) Decreased cerebrospinal fluid pressure
(B) Epidural hematoma
(C) Hypertension proximal to the aortic cross clamp
(D) Improper placement of surgical retractors
(E) Prolonged aortic cross-clamp time

ADVANCED General

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

(A) abnormal platelet function
(B) citrate toxicity
(C) depressed levels of factors V and VIII
(D) dilutional thrombocytopenia
(E) disseminated intravascular coagulation

BASIC Transfusions & Fluids

A 64-year-old, 70-kg woman treated with lithium for manic-depressive psychosis is given methohexital 90 mg and succinylcholine 35 mg intravenously for electroconvulsive therapy. Ten minutes later she remains sedated and the peripheral nerve stimulator shows a decreased twitch response. The most likely explanation is

(A) cerebral hypoxia
(B) postictal depression
(C) relative overdose of methohexital
(D) unrecognized atypical pseudocholinesterase
(E) residual lithium effects

ADVANCED Pharmacology & Pharmacokinetics

Compared with thiopental, methohexital is characterized by

(A) better absorption after rectal administration
(B) greater protein binding
(C) greater hepatic clearance
(D) larger volume of distribution
(E) more complete biotransformation

BASIC Pharmacology & Pharmacokinetics

Which of the following statements concerning the pharmacokinetics of local anesthetics is true?

(A) Decreased molecular weight is associated with decreased incidence of allergic reactions
(B) Decreased protein binding is associated with decreased systemic toxicity
(C) Increased ionization is associated with increased placental transfer
(D) Increased lipid solubility is associated with faster onset
(E) Presence of an ester linkage is associated with increased duration of action

BASIC Pharmacology & Pharmacokinetics