Which of the following considerations should the therapist be ...

[jessicacav]

Which of the following considerations should the therapist be mindful of when choosing to ventilate a patient with pressure support ventilation?
 
  A. Adding mechanical dead space will decrease the patient's VT.
  B. The respiratory rate will likely remain constant.
  C. While asleep, the patient may experience apnea.
  D. The patient's respiratory muscle load may decrease the patient's PaCO2.

Question 2

Which of the following pressures are additive during mechanical ventilation to become the driving pressure for the inspiratory flow?
 
  A. lung elastic recoil pressure and airway pressure
  B. ventilator airway pressure and respiratory muscle pressure
  C. ventilator airway pressure and lung elastic recoil pressure
  D. lung elastic recoil pressure and respiratory muscle pressure

[bubulittle310@msn.cn]

Answer to Question 1

ANS: C
A. Incorrect response: See explanation C.
B. Incorrect response: See explanation C.
C. Correct response: When patients are asleep or under sedation, chemical feedback is the most important factor in determining a patient's breathing pattern. Under this condition, a drop in PaCO2 by only a few mm Hg induces apnea. Assisted ventilation with high VT with assist-control ventilation or PSV results in hypocapnia and increases the likelihood of apneas and periodic breathing.
D. Incorrect response: See explanation C.

Answer to Question 2

ANS: B
A. Incorrect response: See explanation B.
B. Correct response: During mechanical ventilation, the pressure provided by the ventilator (AW) is added to the pressure developed by the patient's respiratory muscles to become the driving pressure responsible for causing the inspiratory flow.
C. Incorrect response: See explanation B.
D. Incorrect response: The lung elastic recoil pressure and respiratory muscle pressure are both required to be overcome by the muscles of inspiration during spontaneous breathing.

[jessicacav]

Thank you

[bubulittle310@msn.cn]

No problemo