A decrease in forced expiratory volume in 1 second (FEV1) and ...

[Wadzanai]

A decrease in forced expiratory volume in 1 second (FEV1) and vital capacity (VC) of greater than 20 when a patient moves from the seated to the supine position is suggestive of which of the following?
 
  a. Diaphragmatic muscle weakness
  b. Scalene muscle weakness
  c. Brainstem injury
  d. Internal intercostal weakness

Question 2

Respiratory muscle weakness is associated with which of the following abnormalities? 1. Pulmonary embolism 2. Ventilatory insufficiency 3. Hypoxemia 4. Atelectasis
 
  a. 4 only
  b. 2, 3, and 4 only
  c. 1 and 3 only
  d. 1, 3, and 4 only

[batool]

Answer to Question 1

ANS: A
A decrease in FEV1 and VC of greater than 20 when a patient moves from the seated to the supine position suggests diaphragmatic muscle weakness.

Answer to Question 2

ANS: B
Of the many neuromuscular problems causing pulmonary dysfunction, respiratory muscle weak-ness that leads to atelectasis, hypoxemia, and ventilatory insufficiency is among the best recog-nized.