Based on the outcomes of the study performed by Ranieri, what ...

[MirandaLo]

Based on the outcomes of the study performed by Ranieri, what should the therapist expect when mechanical dead space is added to the breathing circuit of a patient receiving PAV?
 
  A. decreased VT and increased respiratory rate
  B. decreased respiratory rate and increased PaCO2
  C. no change in either the respiratory rate or VT
  D. increased likelihood of apneas and periodic breathing

Question 2

Which of the following factors must be overcome by the pressure developed by the respiratory muscles during spontaneous breathing? I. elastic recoil of the respiratory system II. the pressure generated to encounter airway resistance III. respiratory system inertia IV. esophageal pressure
 
  A. II, IV only
  B. I, II, III only
  C. I, III, IV only
  D. II, III, IV only

[mcinincha279]

Answer to Question 1

ANS: A
A. Correct response: When mechanically ventilated patients about to be weaned were challenged with mechanical dead space to increase the PaCO2, patients ventilated with PAV experienced a decreased VT and an increased respiratory rate.
B. Incorrect response: See explanation A.
C. Incorrect response: See explanation A.
D. Incorrect response: See explanation A.

Answer to Question 2

ANS: B
A. Incorrect response: See explanation B.
B. Correct response: During spontaneous breathing, the respiratory muscles must overcome (1) the respiratory system's elastic recoil, (2) the pressure developed in the system to overcome airway resistance, and (3) the inertia of the respiratory system.
C. Incorrect response: See explanation B.
D. Incorrect response: See explanation B.

[MirandaLo]

TYSM

[chereeb]

Excellent