This topic contains a solution. Click here to go to the answer

Author Question: When is respiratory muscle fatigue likely to occur? a. When VE exceeds 20 of the maximum ... (Read 66 times)

PhilipSeeMore

  • Hero Member
  • *****
  • Posts: 561
When is respiratory muscle fatigue likely to occur?
 
  a. When VE exceeds 20 of the maximum voluntary ventilation (MVV)
  b. When VE exceeds 40 of the MVV
  c. When VE exceeds 60 of the MVV
  d. When VE exceeds 80 of the MVV

Question 2

Because an elevated PaCO2 increases ventilatory drive in normal subjects, the clinical presence of hypercapnia indicates which of the following?
 
  1. Inability of the stimulus to get to the muscles
  2. Weak or missing central nervous system response to the elevated PCO2
  3. Pulmonary muscle fatigue
  a. 1 and 2 only
  b. 1 and 3 only
  c. 2 and 3 only
  d. 1, 2, and 3



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

stanleka1

  • Sr. Member
  • ****
  • Posts: 325
Answer to Question 1

ANS: C
Comparing the spontaneous minute ventilation with MVV is a helpful index as fatigue and fail-ure are both likely to occur if the minute ventilation exceeds 60 of MVV.

Answer to Question 2

ANS: D
Because an elevated PaCO2 increases ventilatory drive in healthy subjects, the very existence of hypoventilation suggests other problems with the respiratory apparatus. Specifically, the presence of acute respiratory acidosis indicates one of three major problems: (1) the respiratory center is not responding normally to the elevated PaCO2, (2) the respiratory center is responding normally, but the signal is not getting through to the respiratory muscles, or (3) despite normal neurologic response mechanisms, the lungs and chest bellows are simply incapable of providing adequate ventilation due to parenchymal lung disease or muscular weakness.




PhilipSeeMore

  • Member
  • Posts: 561
Reply 2 on: Jul 16, 2018
Excellent


kalskdjl1212

  • Member
  • Posts: 353
Reply 3 on: Yesterday
YES! Correct, THANKS for helping me on my review

 

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 office desk has 400 times more bacteria on it than a toilet.

Did you know?

Malaria mortality rates are falling. Increased malaria prevention and control measures have greatly improved these rates. Since 2000, malaria mortality rates have fallen globally by 60% among all age groups, and by 65% among children under age 5.

Did you know?

Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.

Did you know?

Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.

For a complete list of videos, visit our video library