Anesthesia Hub -

10 Random Questions

A woman with chronic obstructive pulmonary disease is extubated and minimally responsive after isoflurane anesthesia. She is receiving oxygen 6 L/min through a face mask. Respirations are 10/min, PaO2 is 68 mmHg, PaCO2 is 54 mmHg, and pH is 7.28. The most likely cause of the respiratory acidemia is

(A) blunted sensitivity to low pH in the medullary respiratory center
(B) chronic carbon dioxide retention
(C) decreased lung volume from supine positioning
(D) depression of carotid body chemoreceptors by halothane
(E) suppression of hypoxic ventilatory drive by supplemental oxygen

ADVANCED Respiratory & Critical Care

Immediately after a retrobulbar block for cataract surgery, the eye grossly protrudes and the patient has the sensation of pressure in the eye. The most appropriate initial intervention is

(A) hyperventilation
(B) surgical drainage of a hematoma
(C) manual compression of the globe
(D) administration of atropine intravenously
(E) administration of mannitol intravenously

ADVANCED Regional & Pain

Each of the following statements about pheochromocytoma is true EXCEPT:

(A) Preoperative administration of alpha-adrenergic inhibitors will usually reverse EKG changes due to catecholamine myocarditis
(B) Preoperative administration of alpha-adrenergic inhibitors decreases operative mortality
(C) Beta-adrenergic inhibitors should be administered preoperatively only in conjunction with alpha-adrenergic inhibitors
(D) Vasopressor therapy may be necessary postoperatively for treatment of hypotension
(E) Nasal congestion is a sign of inadequate alpha-adrenergic block

ADVANCED General

Which of the following correctly describes the anatomical location of the brachial plexus?

(A) Adjacent to the subclavian vein as it passes between the scalene muscles
(B) Between the middle and posterior scalene muscles
(C) Posterior to the first rib
(D) Posterior to the subclavian artery
(E) Posterior to the vertebral artery

BASIC Regional & Pain

Systemic hypothermia to 30°C is accompanied by

(A) a shift to the right of the oxyhemoglobin dissociation curve
(B) a decrease in carbon dioxide dissolved in plasma
(C) a decrease in the glomerular filtration rate
(D) an increase in MAC of volatile inhalation agents
(E) low-voltage, high-frequency EEG pattern

BASIC Respiratory & Critical Care General

The principal rationale for the use of warmed humidified inspired anesthetic gases in children is to

(A) decrease postoperative respiratory complications
(B) decrease postoperative shivering
(C) preserve ciliary function
(D) prevent dehydration
(E) prevent evaporative heat loss

ADVANCED Equipment & Physics Pediatric

Preoperative evaluation shows a serum sodium concentration of 140 mEq/L, serum chloride concentration of 90 mEq/L, PaCO2 of 46 mmHg, and arterial pH of 7.50. These findings are most indicative of prior treatment with

(A) acetazolamide
(B) enalapril
(C) furosemide
(D) mannitol
(E) spironolactone

BASIC Pharmacology & Pharmacokinetics

Which of the following statements concerning brain stem auditory evoked responses is true?

(A) They monitor cortical function
(B) They are not affected by changes in PaCO2
(C) They are not affected by mild hypothermia (34°C)
(D) They are more resistant to anesthetic effects than somatosensory evoked responses
(E) They are abolished coincident with flattening of the EEG

ADVANCED Neuro

Which of the following statements concerning the retinopathy of prematurity is true?

(A) The initial lesion is dilation of retinal capillaries
(B) It can be prevented by maintaining FiO2 below 0.4
(C) It is less likely to develop if PaO2 is maintained below 70 mmHg
(D) The incidence is unrelated to birth weight
(E) Infants whose postconceptual age has reached 40 weeks are no longer at risk

ADVANCED Pediatric

A 64-year-old man with diabetes mellitus well controlled with NPH insulin undergoes lower extremity revascularization. Following administration of protamine 10 mg, the patient has facial flushing and blood pressure of 60/30 mmHg. The most appropriate initial step in management is administration of which of the following drugs?

(A) Diphenhydramine
(B) Epinephrine
(C) Hydrocortisone
(D) Norepinephrine
(E) Phenylephrine

ADVANCED Pharmacology & Pharmacokinetics General