Which of the following therapeutic measures would be the most ...

[Mr.Thesaxman]

Which of the following therapeutic measures would be the most effective in treating hypoxemia in the presence of intrapulmonary shunting associated with ARDS?
 
  a. Sedating the patient to blunt noxious stimuli
  b. Increasing the FiO2 on the ventilator
  c. Administering positive-end expiratory pressure (PEEP)
  d. Restricting fluids to 500 mL per shift

Question 2

The correct procedure for selecting an oropharyngeal airway is to
 
  a. measure from the tip of the nose to the ear lobe.
  b. measure from the mouth to the ear lobe.
  c. measure from the tip of the nose to the middle of the trachea.
  d. measure the airway from the corner of the patient's mouth to the angle of the jaw.

[aburgess]

Answer to Question 1

C
The purpose of using positive-end expiratory pressure (PEEP) in a patient with acute respiratory distress syndrome is to improve oxygenation while reducing FiO2 to less toxic levels. PEEP has several positive effects on the lungs, including opening collapsed alveoli, stabilizing flooded alveoli, and increasing functional residual capacity. Thus, PEEP decreases intrapulmonary shunting and increases compliance.

Answer to Question 2

D
An oropharyngeal airway's proper size is selected by holding the airway against the side of the patient's face and ensuring that it extends from the corner of the mouth to the angle of the jaw. If the airway is improperly sized, it will occlude the airway. Nasopharyngeal airways are measured by holding the tube against the side of the patient's face and ensuring that it extends from the tip of the nose to the ear lobe.

[Mr.Thesaxman]

TYSM

[xiaomengxian]

Excellent