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Author Question: During volume-targeted assist/control with a Pulmonetic Systems LTV 1000, the tidal volume is set at ... (Read 91 times)

robinn137

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on: Jul 16, 2018
During volume-targeted assist/control with a Pulmonetic Systems LTV 1000, the tidal volume is set at 800 mL, and inspiratory time is set at 1 s. Inspiration will end when which of the following is reached?
 
  a. Tidal volume of 800 mL c. Set pressure limit
  b. Inspiratory time of 1 s d. Flow rate of 24 L/min

Question 2

What inspiratory flow and inspiratory time would produce a tidal volume of 750 mL on the Smiths Medical Pneupac ventiPAC ventilator? Inspiratory flow Inspiratory time
 
  1. 0.33 L/s 1 s
  2. 0.5 L/s 1.5 s
  3. 0.75 L/s 1 s
  4. 0.45 L/s 2 s
  a. 3 only c. 1 and 4
  b. 2 and 3 d. 1, 2, and 4


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aloop

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Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: D
During volume-targeted breaths, the peak flow at the beginning of inspiration is calculated by the ventilator so that the tidal volume can be delivered during the set inspiratory time, and inspiration ends when flow decreases to 50 of the peak or 10 L/min, whichever is highest. The calculated flow rate is 0.8 L  1 s, or 0.8 L  1/60 of a second. Flow rate = 48 L/min; 50 of 48 L/min is 24 L/min.

Answer to Question 2

ANS: B
Tidal volume (L) = Inspiratory flow (L/s)  Inspiratory time (s). 0.5 L/s  1.5 s = 0.75 L, or 750 mL, and 0.75 L/s  1 s = 0.75 L, or 750 mL.


robinn137

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Reply 2 on: Jul 16, 2018
Wow, this really help

kthug

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Reply 3 on: Yesterday
Excellent

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