Author Question: After oxygen is administered, a patient's heart rate changes from 110 to 85 beats/min. The initial ... (Read 23 times)

clippers! · **on:** Jul 16, 2018

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 · **Reply #1 on:** Jul 16, 2018

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)