While working in the neonatal intensive care unit, a respiratory ...

[torybrooks]

While working in the neonatal intensive care unit, a respiratory therapist notices that a baby with an apnea monitor is not breathing, but the apnea alarm is not ringing. Which of the following might cause this failure?
 
  1. Tachypnea
  2. Bradycardia
  3. Excessive movement
  4. Upper airway obstruction
  a. 1 and 2 c. 1 and 3
  b. 2 and 4 d. 3 and 4

Question 2

Opposition to the flow of an alternating current is the definition of:
 
  a. electrical resistance. c. electrical imped-ance.
  b. variable capaci-tance. d. variable inductance.

[Kingjoffery]

Answer to Question 1

ANS: B
Bradycardia and upper airway obstruction can cause apnea monitors to fail to signal apnea, be-cause with bradycardia, cardiac oscillations and intrathoracic blood-volume changes cause an in-crease in impedance, which is sensed as part of the respiratory cycle. Continued respiratory ef-forts in the presence of upper airway obstruction are sensed as normal respiratory efforts.

Answer to Question 2

ANS: C
Electrical impedance, which is opposition to the flow of an alternating current, is determined by the resistance and capacitance of the circuit through which the current must pass.

[torybrooks]

TYSM

[ttt030911]

Gracias!