After oxygen is administered, a patient's heart rate changes from ...

[clippers!]

After oxygen is administered, a patient's heart rate changes from 110 to 85 beats/min. The initial tachycardia was most likely caused by which of the following?
 
  a. Anxiety
  b. Hypoxemia
  c. Hypercapnia
  d. Pain

Question 2

A 14-year-old boy who had previously been diagnosed with mild persistent asthma has a PEFR of 100 L/min. This indicates which of the following?
 
  a. Increased airway resistance
  b. Heart failure
  c. Increased lung compliance
  d. Inability to take in a deep breath and cough

[thall411]

Answer to Question 1

ANS: B
Tachycardia is a sign of hypoxemia. Once the hypoxemia is corrected, their heart rate typically improves.

Answer to Question 2

ANS: A
For patients with acute asthma, the PEFR is the most frequently used parameter to assess airway resistance.

Peak expiratory flow rate (PEFR) (L/min) 350-600 (normal) 75-100 (critical value)

[clippers!]

Gracias!

[mcarey591]

TYSM