In analyzing the ECG strip, the nurse notices a spike before each QRS complex. The patient's heart rate is 70 beats/min. This phenomenon is reflective of
a. 60-cycle electrical interference; check equipment.
b. pacing artifact; the pacemaker is sensing and capturing.
c. electrical artifact; the pacemaker is not sensing.
d. patient movement; check electrodes.
Question 2Use of oxygen therapy in the patient who is hypercapnic may result in
a. oxygen toxicity.
b. absorption atelectasis.
c. carbon dioxide retention.
d. pneumothorax.
Question 3Which of the following is an example of a disorder with increased tactile fremitus?
a. Emphysema
b. Pleural effusion
c. Pneumothorax
d. Pneumonia
Question 4The GCS is an invalid measure for the patient with
a. hemiplegia.
b. Parkinson disease.
c. mental retardation.
d. intoxication.
Question 5Pulsus paradoxus may be seen on intra-arterial blood pressure monitoring when
a. there is a decrease of more than 10 mm Hg in the arterial waveform before inhalation.
b. there is a single, nonperfused beat.
c. the waveform demonstrates tall, tented T waves.
d. the pulse pressure is greater than 20 mm Hg on exhalation.
Question 6Which of the following diagnostic criteria is indicative of ARDS?
a. Radiologic evidence of bibasilar atelectasis
b. PaO2/FiO2 ratio less than or equal to 200 mm Hg
c. Pulmonary artery wedge pressure greater than 18 mm Hg
d. Increased static and dynamic compliance
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