Author Question: The respiratory therapist has determined that a 4.0-mm internal diameter standard endotracheal tube ... (Read 54 times)

daltonest1984 · **on:** Jul 16, 2018

The respiratory therapist has determined that a 4.0-mm internal diameter standard endotracheal tube is necessary for the patient. What is the equivalent hi-lo jet tube to be used with a Bunnell Life Pulse High-Frequency Jet Ventilator?

a. 3.0-mm internal diameter hi-lo jet tube
b. 3.5-mm internal diameter hi-lo jet tube
c. 4.0-mm internal diameter hi-lo jet tube
d. 4.5-mm internal diameter hi-lo jet tube

Question 2

The cannot meet PIP alarm is active on a Bunnell Life Pulse High-Frequency Jet Ventilator. The respiratory therapist should do which of the following?

1. Check the humidifier cartridge for a leak.
2. Check the jet tube connection to the circuit.
3. Look for kinks in the jet tube connections.
4. Check the dump valve for proper function.
a. 2 c. 3 and 4
b. 1 and 2 d. 1, 2, and 3

bbburns21 · **Reply #1 on:** Jul 16, 2018

Answer to Question 1

ANS: B
The external diameter of a hi-lo jet tube is approximately equal to the external diameter of a standard endotracheal tube that is a half-size larger. Therefore, hi-lo tube size = standard endo-tracheal tube size 0.5 mm; 4.0 mm is standard endotracheal tube size, so 4.0 mm 0.5 = 3.5-mm hi-lo tube size.

Answer to Question 2

ANS: D
The cannot meet PIP alarm can be a result of a leak in the humidifier cartridge/patient circuit; an incomplete connection of the circuit to the jet tube; a defective or damaged jet tube (e.g., a kinked tube, improper positioning, occlusion, leak); the present settings being insufficient to ven-tilate larger patients; a patient fighting the Life Pulse; or an ineffective pinch valve opening ac-tion resulting in higher servo pressures being necessary to meet current settings.