Which of the following would be normal findings of the heart and ...

[Wadzanai]

Which of the following would be normal findings of the heart and its surrounding area?
 
  1. The left hilum is about 2 cm higher than the right hilum.
  2. Most of the heart shadow is to the right of the sternum.
  3. Calcified lymph nodes indicate an adult patient.
  4. The cardiothoracic ratio is less than 1:2.
  a. 1, 4
  b. 2, 3
  c. 1, 2, 4
  d. 1, 2, 3, 4

Question 2

A CPAP titration polysomnogram is performed to:
 
  a. find the maximum CPAP level for the functional residual capacity.
  b. determine the lowest possible CPAP level.
  c. find the CPAP level to maintain an open airway.
  d. determine the pressure needed for negative-pressure ventilation.

[brittanywood]

Answer to Question 1

A
Normally, the left hilum is about 2 cm higher than the right hilum and the cardiothoracic ratio is less than 1:2 . Most of the heart's shadow should be on the left side of the sternum. Calcified lymph nodes could be a sign of histoplasmosis or tuberculosis.

Answer to Question 2

C
A CPAP titration polysomnogram is performed to find the CPAP level to maintain an open airway. The CPAP is delivered to the patient through a nasal (or full face) mask. If the CPAP level is too low, the airway will tend to still collapse. Too high a CPAP level puts unnecessary pressure on the lungs and heart. The CPAP level is not used to set the pressure for negative-pressure ventilation.

[Wadzanai]

TY

[brittanywood]

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