This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: If a rectangular (square) pressure waveform is generated during pressure-controlled ventilation, ... (Read 77 times)

wrbasek0

  • Hero Member
  • *****
  • Posts: 560
on: Jul 16, 2018
If a rectangular (square) pressure waveform is generated during pressure-controlled ventilation, what type of waveforms will develop for volume and flow?
 
  A. volume waveform: exponential rise; flow waveform: exponential decline
  B. volume waveform: exponential decline; flow waveform: exponential rise
  C. volume waveform: sinusoidal; flow waveform: ascending ramp
  D. volume waveform: descending ramp; flow waveform: rectangular

Question 2

Which of the following terms describe the configuration of a ventilator waveform? I. hyperbolic II. sinusoidal III. rectangular IV. exponential
 
  A. II, III only
  B. I, II, IV only
  C. I, III, IV only
  D. II, III, IV only


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

dominiqueenicolee

  • Sr. Member
  • ****
  • Posts: 314
Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: AA. Correct response: A rectangular pressure waveform is accompanied by an exponentially rising volume waveform and an exponentially decaying (declining) flow waveform. The volume rises exponentially to a value equal to the product of the lung compliance and the difference between the PIP and the PEEP. That is,
volume = CL (PIP  PEEP)
L = L/cm H2O (cm H2O)
The inspiratory flow declines exponentially from its peak level, which is equal to the difference between change in airway pressure multiplied by the airway resistance. Hence,
flow = Raw  (PIP  PEEP)
L/sec = cm H2O/L/sec  (cm H2O)

B. Incorrect response: The choice has the waveforms opposite of what they actually are.
C. Incorrect response: When the pressure waveform is sinusoidal, the volume and flow waveforms are also sinusoidal.
D. Incorrect response: See explanation for choice A above.

Answer to Question 2

ANS: DI. Incorrect response: None of the ventilator waveforms is hyperbolic.
II. Correct response: The most common types of waveform produced by mechanical ventilators are:
  Rectangular
  Ramp
  Exponential
  Sinusoidal
III. Correct response: See explanation II.
IV. Correct response: See explanation II


wrbasek0

  • Member
  • Posts: 560
Reply 2 on: Jul 16, 2018
Great answer, keep it coming :)

Bigfoot1984

  • Member
  • Posts: 321
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

A good example of polar molecules can be understood when trying to make a cake. If water and oil are required, they will not mix together. If you put them into a measuring cup, the oil will rise to the top while the water remains on the bottom.

Did you know?

Warfarin was developed as a consequence of the study of a strange bleeding disorder that suddenly occurred in cattle on the northern prairies of the United States in the early 1900s.

Did you know?

The average human gut is home to perhaps 500 to 1,000 different species of bacteria.

Did you know?

Certain rare plants containing cyanide include apricot pits and a type of potato called cassava. Fortunately, only chronic or massive ingestion of any of these plants can lead to serious poisoning.

Did you know?

Adults are resistant to the bacterium that causes Botulism. These bacteria thrive in honey – therefore, honey should never be given to infants since their immune systems are not yet resistant.

stage II pressure ulcer stage II pressure ulcer
Unlike this beautiful ant, we humans are not controlled by instincts. Sociobiologists, though, are ... Unlike this beautiful ant, we humans are not controlled by instincts. Sociobiologists, though, are ...
The waveform of a good oxygen sensor as displayed on a digital storage oscilloscope (DSO). Note ... The waveform of a good oxygen sensor as displayed on a digital storage oscilloscope (DSO). Note ...
Use of the elbow to apply pressure to trigger points in the trapezius with the receiver in sitting ... Use of the elbow to apply pressure to trigger points in the trapezius with the receiver in sitting ...
Probability Values of Chi-Square Analysis Probability Values of Chi-Square Analysis
Punnett square Punnett square
Video: Plant Defense Mechanisms from Pathogens

For a complete list of videos, visit our video library