Page 608 - Clinical Application of Mechanical Ventilation

574 Chapter 17

13. The blood gas values of a normal umbilical artery sample include all of the following except:
A. pH from 7.3 to 7.45. C. PO greater than 50 mm Hg.
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B. PCO from 35 to 45 mm Hg. D. SaO from 60% to 90%.
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14. High frequency ventilation has the advantages of delivering _______ and reducing the incidence of _______.
A. small tidal volume, barotrauma
B. large tidal volume, barotrauma
C. large mean airway pressure, necrotizing tracheobronchitis
D. low peak inspiratory pressure, air trapping

15 to 17. Match the type of high frequency ventilator with the respective frequency (cycles/minute). Use each
answer once.

Type Of High Frequency Ventilator Frequency (Cycles Per Minute)

15. High frequency jet ventilation (HFJV) A. 60 to 150
16. High frequency oscillatory ventilation (HFOV or HFO) B. 240 to 660

17. High frequency positive pressure ventilation (HFPPV) C. 480 to 1800

18. To minimize tracheal damage caused by high pressure gas jets in high frequency jet ventilation (HFJV),
a specially designed tube allows pulsed gas to exit _______ the endotracheal tube.
A. at the distal end of C. at the middle and inside of
B. at the proximal end of D. at the middle and outside of

19. During high frequency jet ventilation (HFJV) or high frequency oscillatory ventilation (HFOV), assessment
of a patient’s cardiopulmonary status is difficult. Signs of deterioration may include all of the following except:
A. respiratory distress. C. hypotension.
B. tachycardia. D. pallor.

20. Candidates for HFOV may exhibit all of the following clinical conditions with the exception of:

A. difficulty to wean from conventional ventilation.
B. increasing ventilation requirement.
C. rapidly increasing F O requirement.
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D. chest radiograph consistent with diffuse, homogeneous lung disease.

21. A neonate is being ventilated by a high frequency oscillator. Her physician would like to lower the pa-
tient’s PaCO . The therapist should increase the level of ventilation by _______ or _______.
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A. increasing the power (amplitude), increasing the frequency (Hz)
B. increasing the power (amplitude), decreasing the frequency (Hz)
C. decreasing the power (amplitude), increasing the frequency (Hz)
D. decreasing the power (amplitude), decreasing the frequency (Hz)

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