Author Question: The therapist is establishing mechanical ventilation on a patient and intends to use flow-waveform ... (Read 40 times)

javeds · **on:** Jul 16, 2018

The therapist is establishing mechanical ventilation on a patient and intends to use flow-waveform triggering as the triggering mechanism. To which of the following problems does the therapist need to be perceptive?

A. auto-triggering
B. dynamic hyperinflation
C. ineffective triggering
D. auto-cycling

Question 2

Which of the following terms or expressions describes the presence of end-expiratory lung volume above the passive functional residual capacity?

A. elastance
B. compliance
C. dynamic hyperinflation
D. patient-ventilator dyssynchrony

lorealeza · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: A
A. Correct response: Compared with flow triggering, flow-waveform triggering is more sensitive to patient effort, resulting in fewer ineffective efforts, but more sensitive to auto- triggering. Flow-waveform triggering improves trigger synchrony, and requires less effort for triggering, but because of the improved sensitivity, is susceptible to auto-triggering.
B. Incorrect response: See explanation A.
C. Incorrect response: See explanation A.
D. Incorrect response: See explanation A.

Answer to Question 2

ANS: C
A. Incorrect response: Elastance is the reciprocal of compliance.
B. Incorrect response: Compliance refers to the ease of lung distensibility.
C. Correct response: The term dynamic hyperinflation is an increase in the functional residual capacity above the elastic equilibrium volumes of the respiratory system.
D. Incorrect response: Patient-ventilator dyssynchrony refers to a situation in which either the patient is out of phase with the ventilator, or when the ventilator is out of phase with the patient.