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 107 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
Wow, this really help

cpetit11

  • Member
  • Posts: 321
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

About 3% of all pregnant women will give birth to twins, which is an increase in rate of nearly 60% since the early 1980s.

Did you know?

People often find it difficult to accept the idea that bacteria can be beneficial and improve health. Lactic acid bacteria are good, and when eaten, these bacteria improve health and increase longevity. These bacteria included in foods such as yogurt.

Did you know?

The familiar sounds of your heart are made by the heart's valves as they open and close.

Did you know?

ACTH levels are normally highest in the early morning (between 6 and 8 A.M.) and lowest in the evening (between 6 and 11 P.M.). Therefore, a doctor who suspects abnormal levels looks for low ACTH in the morning and high ACTH in the evening.

Did you know?

The tallest man ever known was Robert Wadlow, an American, who reached the height of 8 feet 11 inches. He died at age 26 years from an infection caused by the immense weight of his body (491 pounds) and the stress on his leg bones and muscles.

An example of a homeostatically controlled variable: blood levels of glucose in a human. An example of a homeostatically controlled variable: blood levels of glucose in a human.
Looking toward the sky around Orion from Alpha Centauri with Sirius near Betelgeuse and the Sun betw Looking toward the sky around Orion from Alpha Centauri with Sirius near Betelgeuse and the Sun betw
Sphygmomanometry. Photograph of a physician taking blood pressure readings with the use of a sphygmo Sphygmomanometry. Photograph of a physician taking blood pressure readings with the use of a sphygmo
A typical port fuel-injected system showing a vacuum-controlled fuel-pressure regulator. A typical port fuel-injected system showing a vacuum-controlled fuel-pressure regulator.
JNC-VII Classification of Blood Pressure for Adults JNC-VII Classification of Blood Pressure for Adults
How to shift and reflect a square root function using transformations How to shift and reflect a square root function using transformations
Video: Energy sources - types

For a complete list of videos, visit our video library