A patient is admitted with acute respiratory failure attributable to pneumonia. Smoking history reveals that the patient smoked two packs of cigarettes a day for 25 years, stopping 10 years ago.
ABG values on the current ventilator settings are pH, 7.37; PaCO2, 50 mm Hg; and HCO3-, 27 mEq/L. Chest radiograph reveals a large right pleural effusion. Intrapulmonary shunting value of 35 indicates
a. normal gas exchange of venous blood.
b. an abnormal finding indicative of a shunt-producing disorder.
c. a serious and potentially life-threatening condition.
d. metabolic alkalosis.
Question 2A patient presents with the following values: pH, 7.20; paO2, 106 mm Hg; paCO2, 35 mm Hg; and HCO3-, 11 mEq/L. These values are most consistent with
a. uncompensated respiratory acidosis.
b. uncompensated metabolic acidosis.
c. uncompensated metabolic alkalosis.
d. uncompensated respiratory alkalosis.
Question 3Adenosine (Adenocard) is an antidysrhythmic agent given primarily to
a. convert supraventricular tachycardias.
b. act as a second-line drug for premature ventricular contractions (PVCs).
c. treat AV blocks.
d. coarsen ventricular fibrillation so that defibrillation is effective.
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