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

Author Question: Three sets of pressure, flow, and volume waveforms are depicted below from a patient who is ... (Read 74 times)

abc

  • Hero Member
  • *****
  • Posts: 543
on: Jul 16, 2018
Three sets of pressure, flow, and volume waveforms are depicted below from a patient who is receiving continuous mandatory ventilation. Identify the control variable, and which set of waveforms reflects a decreased lung compliance.
 
  A. control variable: pressure; decreased lung compliance: set C
  B. control variable: pressure; decreased lung compliance: set A
  C. control variable: volume; decreased lung compliance: set B
  D. control variable: volume; decreased lung compliance: set C

Question 2

Which of the following devices are output control valves used to regulate the flow of gas to the patient? I. rack and pinion poppet valves II. proportional valves III. electromagnetic poppet valves IV. pneumatic poppet valves
 
  A. I, II only
  B. III, IV only
  C. I, II, III 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

nixon_s

  • Sr. Member
  • ****
  • Posts: 359
Reply #1 on: Jul 16, 2018
Answer to Question 1

ANS: D
A. Incorrect response: Pressure is not the control variable because its value is different in each set of waveforms. Set C is the correct set of waveforms reflecting decreased lung compliance (stiffer lungs).
B. Incorrect response: Pressure is not the control variable because its value is different in each set of waveforms; therefore it is not constant.
C. Incorrect response: Volume is the control variable because it remains constant in each of the three sets of waveforms. The pressure tracing in set B represents the lowest pressure value among the three presented. Therefore the pressure waveform in set B does not reflect decreased pulmonary compliance.
D. Correct response: Volume is the control variable because it remains constant in each of the three sets of waveforms. The expression volume control means that volume is the control variable, and does not change. Set C signifies the response to decreased lung compliance. Especially, note that the pressure tracing in set C indicates the highest pressure among the three tracings. This finding is consistent with decreased pulmonary compliance.

Answer to Question 2

ANS: DI. Incorrect response: The electric motor/rack and pinion is a ventilator drive mechanism. The drive mechanism of a ventilator produces the force needed to deposit gas into the lungs of the patient.
II. Correct response: A proportional valve resembles a solenoid valve. It is operated via an electric motor whose rotation can be controlled in discrete arcs, or steps. Proportional valves change the size of their openings, thus influencing the shape of the flow-time waveform during inspiration. In fact, because the size of the opening can vary significantly, a variety of waveforms can be produced.
III. Correct response: The electromagnetic poppet valve is the same as a solenoid valve. It uses magnetism created by an electric current to control pneumatic pressure.
IV. Correct response: The pneumatic poppet valve uses small pneumatic pressure to control large pneumatic pressure.


abc

  • Member
  • Posts: 543
Reply 2 on: Jul 16, 2018
YES! Correct, THANKS for helping me on my review

ashely1112

  • Member
  • Posts: 347
Reply 3 on: Yesterday
:D TYSM

« previous next »
 

Did you know?

The top five reasons that children stay home from school are as follows: colds, stomach flu (gastroenteritis), ear infection (otitis media), pink eye (conjunctivitis), and sore throat.

Did you know?

If you use artificial sweeteners, such as cyclamates, your eyes may be more sensitive to light. Other factors that will make your eyes more sensitive to light include use of antibiotics, oral contraceptives, hypertension medications, diuretics, and antidiabetic medications.

Did you know?

The senior population grows every year. Seniors older than 65 years of age now comprise more than 13% of the total population. However, women outlive men. In the 85-and-over age group, there are only 45 men to every 100 women.

Did you know?

Asthma-like symptoms were first recorded about 3,500 years ago in Egypt. The first manuscript specifically written about asthma was in the year 1190, describing a condition characterized by sudden breathlessness. The treatments listed in this manuscript include chicken soup, herbs, and sexual abstinence.

Did you know?

There used to be a metric calendar, as well as metric clocks. The metric calendar, or "French Republican Calendar" divided the year into 12 months, but each month was divided into three 10-day weeks. Each day had 10 decimal hours. Each hour had 100 decimal minutes. Due to lack of popularity, the metric clocks and calendars were ended in 1795, three years after they had been first marketed.

Common errors in blood pressure assessment Common errors in blood pressure assessment
Patient Education Follow-up Plan Patient Education Follow-up Plan
A patient undergoing hemodialysis. A patient undergoing hemodialysis.
Direct pressure applied to a sinus reflex on the tip of a toe. Direct pressure applied to a sinus reflex on the tip of a toe.
The Accessory Organs The liver, gallbladder, and pancreas produce digestive secretions that flow The Accessory Organs The liver, gallbladder, and pancreas produce digestive secretions that flow
System of a patient in shock System of a patient in shock
Video: Integumentary Anatomy

For a complete list of videos, visit our video library