Identify the clinical manifestations associated with oxygen ...

[strangeaffliction]

Identify the clinical manifestations associated with oxygen toxicity. (Select all that apply.)
 
  a. Substernal chest pain that increases with deep breathing
  b. Moist cough and tracheal irritation
  c. Pleuritic pain occurring on inhalation, followed by dyspnea
  d. Increasing CO2
  e. Sore throat and eye and ear discomfort

Question 2

A patient presents with atrial flutter with an atrial rate of 280 beats/min and a ventricular rate of 70 beats/min. Which of the following best explains this discrepancy in rates?
 
  a. The ventricles are too tired to respond to all the atrial signals.
  b. The AV node does not conduct all the atrial signals to the ventricles.
  c. Some of the atrial beats are blocked before reaching the AV node.
  d. The ventricles are responding to a ventricular ectopic pacemaker.

[Harbringer]

Answer to Question 1

A, C, E
A number of clinical manifestations are associated with oxygen toxicity. The first symptom is substernal chest pain that is exacerbated by deep breathing. A dry cough and tracheal irritation follow. Eventually, definite pleuritic pain occurs on inhalation followed by dyspnea. Upper airway changes may include a sensation of nasal stuffiness, sore throat, and eye and ear discomforts.

Answer to Question 2

B
The atrioventricular (AV) node does not allow conduction of all these impulses to the ventricles. In this case, the rhythm would be described as atrial flutter with a 4:1 AV block, indicating that only one of every four atrial signals is conducted to the ventricles.