Anesthesia Hub -

10 Random Questions

A moderately obese 38-year-old woman is using patient-controlled morphine analgesia one day after open cholecystectomy. While breathing room air, oxygen saturation is 85%, Pa02 is 48 mmHg, PaC02 is 42 mmHg, and pH is 7.36. In addition to administration of oxygen, the most effective management is to

(A) decrease the dosage of opioids
(B) change to epidural morphine
(C) administer an inhaled bronchodilator
(D) initiate 4 cm of nasal continuous positive airway pressure
(E) initiate incentive spirometry therapy

Which of the following is a known effect of propofol?

(A) Decreased amplitude of somatosensory evoked potentials
(B) Induction of malignant hyperthermia
(C) Inhibition of cytochrome P450
(D) Initiation of porphyria
(E) Suppression of adrenocortical function

BASIC Pharmacology & Pharmacokinetics

The EEG of a patient undergoing anesthesia with high-dose fentanyl would most likely show

(A) the same pattern seen with enflurane 0.5 MAC
(B) cessation of low-frequency activity
(C) accentuation of high-frequency activity
(D) uniform depression of all frequencies
(E) low-frequency, high-amplitude activity

An obese, 70-year-old woman with a long history of tobacco abuse is awake and semirecumbent after uneventful anesthesia with isoflurane for a ventral hernia repair. During the first hour in the recovery room while breathing 50% oxygen by face mask, her arterial oxygen saturation decreases to 90% while other vital signs remain satisfactory. Which of the following is most likely to be effective in the management of this situation?

(A) Intravenous doxapram
(B) Racemic epinephrine by inhalation
(C) Continuous positive airway pressure by mask
(D) Reintubation of the trachea
(E) Coughing

BASIC Respiratory & Critical Care General

Hyperkalemia in response to the administration of an intubating dose of succinylcholine is associated with each of the following disorders EXCEPT

(A) poliomyelitis
(B) multiple sclerosis
(C) hemiplegia
(D) acute cervical cord transection
(E) familial periodic paralysis

ADVANCED Pharmacology & Pharmacokinetics

Which of the following decreases the risk for burns during electrocauterization?

(A) Conductive flooring
(B) Grounding of the patient to the operating table
(C) Increased resistance at the return electrode
(D) Isolation of the current output of the electrosurgical unit
(E) Placement of the return electrode at a distance from the surgical site

BASIC Equipment & Physics

Left ventricular end-diastolic volume is most likely to be underestimated by pulmonary artery occlusion pressure in patients with

(A) acute myocardial ischemia
(B) aortic insufficiency
(C) mitral stenosis
(D) primary pulmonary hypertension
(E) tricuspid stenosis

BASIC Cardiac

A sensory level of T2 is achieved after administration of spinal anesthesia. Which of the following lung volumes is LEAST likely to be affected?

(A) Expiratory reserve volume
(B) Inspiratory reserve volume
(C) Inspiratory capacity
(D) Tidal volume
(E) Vital capacity

BASIC Respiratory & Critical Care Regional & Pain

When the inspired gas is changed from air to 20% oxygen and 80% nitrous oxide, PaO2 increases because

(A) increased pulmonary artery pressure perfuses alveoli that previously enhanced dead space
(B) nitrous oxide stimulates the respiratory center
(C) rapid absorption of nitrous oxide increases alveolar oxygen concentration
(D) replacement of nitrogen by nitrous oxide expands atelectatic alveoli
(E) respiratory depression from nitrous oxide shifts the oxyhemoglobin dissociation curve

BASIC Pharmacology & Pharmacokinetics

A patient who is receiving ventilatory support after coronary artery bypass grafting has a PaO2 of 132 mmHg, a PaCO2 of 19 mmHg, and a pH of 7.57. Which of the following is most likely to result from this level of hypocarbia?

(A) Decreased airway resistance
(B) Increased myocardial contractility
(C) Hyperkalemia
(D) Shortened QT interval
(E) Cerebral ischemia

ADVANCED Neuro Cardiac