Question 1

When NeoFlow on the Dräger E-4 is activated,how much bias flow is initiated?

Accepted Answer

The base,or bias,flow during NeoFlow use is 6 L/min.

Question 2

NeoFlow on a Dräger E-4 requires the installation of a flow sensor into which part of the patient circuit?

Accepted Answer

NeoFlow requires the placement of a flow sensor between the artificial airway and the Y-connector of the patient circuit.

Question 3

Increasing the bias flow on the CareFusion 3100A High-frequency Oscillatory Ventilator would cause which of the following to occur?

Accepted Answer

Changes to the bias flow can increase mean airway pressure.A limit to how much mean airway pressure can develop in the system is controlled by the mean pressure limit control knob.This control is used to protect the patient from inadvertent increases in mean airway pressure caused by changes in bias flow,percent inspiratory time,or frequency.

Question 4

Which of the following actions will maximize the life of the oscillator mechanism on a CareFusion 3100A High-frequency Oscillatory Ventilator?

Accepted Answer

Keeping the piston in the center of the bar graph will prevent the piston from being driven against a mechanical stop for an extended period.Operating against a mechanical stop will wear out the oscillator mechanism quickly.

Question 5

During infant ventilation with the CareFusion AVEA Ventilator and the Cosmo Plus Monitor,the readings on the Cosmo Plus Monitor have "blanked out." What is the cause of this problem?

Accepted Answer

One of the concerns with the use of the Cosmo Plus is that the readings become "blanked out" when water condensation accumulates in the device.

Question 6

The "jet valve fault" alarm is active on a Bunnell Life Pulse High-Frequency Jet Ventilator.This problem can be corrected by doing which of the following?

Accepted Answer

The jet valve fault alarm alerts the clinician that the pinch valve in the patient box is not functioning appropriately.This could be because of a worn-out pinch valve tube.

Question 7

Lowering the frequency on the CareFusion 3100A or 3100B would do which of the following?
1)Decrease the volume delivered
2)Increase the inspiratory time
3)Increase the volume delivered
4)Increase the mean airway pressure

Accepted Answer

When the frequency is lowered,the piston is allowed more travel time.This results in greater piston displacement,or more delivered volume,the amount of which is unknown.

Question 8

How many cycles per minute is 15 Hz?

Accepted Answer

A value of 1 Hz is 60 cycles/min.Therefore,15 Hz * 60 cycles/min = 900 cycles/min.

Question 9

On a Dräger E-4 operating in NeoFlow,which of the following trigger ranges is recommended for neonatal and pediatric ventilation?

Accepted Answer

A trigger range of 0.3 to 3 L/min is recommended for neonatal and pediatric ventilation.

Question 10

The purpose of the Venturi-type air amplifier on the CareFusion 3100A is to do which of the following?

Accepted Answer

The function of the Venturi-type air amplifier is to introduce cooling air around the electrical coil.

Question 11

While a patient is being ventilated with NeoFlow on a Dräger E-4,an audible and visual alarm is active,and all breaths are being time-triggered. What is the most appropriate action for the respiratory therapist to take?

Accepted Answer

If the NeoFlow sensor becomes partially occluded with water (or secretions),it will cease operation and trigger audible and visual alarms.When this occurs,the ventilator will continue to operate in the pressure-control mode.

Question 12

The jet rate range for the Bunnell Life Pulse High-Frequency Jet Ventilator is _____ insufflations/min.

Accepted Answer

The Life Pulse High-Frequency Jet Ventilator can provide 240 to 660 insufflations/min.The range 660 to 900 insufflations/min is considered high-frequency oscillation.The range 60 to 150 insufflations/min is considered high-frequency positive pressure ventilation.

Question 13

Which of the following statements concerning the use of AutoFlow for neonates on the Dräger E-4 is true?

Accepted Answer

When the flow sensor is attached during AutoFlow in neonates,the unit provides two test breaths,first with a pressure of 5 cm H₂O and then with a pressure equal to 75% of that required to deliver the set volume.

Question 14

Which of the following statements concerning the CareFusion 3100A and 3100B is true?

Accepted Answer

The CareFusion 3100B has automatic piston-centering,and the center piston control has been eliminated from the 3100B.The 3100A has a mean pressure limit control; on the 3100B,this control has been eliminated.The high mean airway pressure alarm is 50 cm H₂O on the 3100A and 60 cm H₂O on the 3100B.The inspiratory time control limits are the same on both models.

Question 15

An increase in % inspiratory time on the CareFusion 3100A would cause which of the following?
1)Alteration in the symmetry of the oscillator waveform
2)Decrease in the frequency
3)Increase in the airway pressure
4)Decrease in volume

Accepted Answer

An increase in % inspiratory time would cause more time to be spent in the inspiratory phase,so the symmetry of the waveform would be altered.The change to % inspiratory time would also cause an increase in airway pressure.This change should be readjusted by using the power control.

Question 16

When helium/oxygen (heliox)is used with the CareFusion AVEA Ventilator in the infant/pediatric modes,which of the following statements is true?

Accepted Answer

With heliox use,the CareFusion AVEA's internal inspiratory flow sensor or the VarFlex flow sensor may be used.

Question 17

NeoFlow on the Dräger E-4 is essential for infants with which of the following weights?
1)3.8 kg
2)5.0 kg
3)7.6 kg
4)8.4 kg

Accepted Answer

NeoFlow is essential with patients weighing less than 6 kg.

Question 18

A patient who weighs 4000 g is being ventilated by using a CareFusion AVEA Ventilator.How much volume will be lost in the tubing when the pressure is set at 15 cm H₂O?

Accepted Answer

When using the CareFusion AVEA with a patient weighing 5 kg or less,an infant circuit with a compressible volume of approximately 1 mL/cm H₂O should be used.This will cause 15 mL to be left in the tubing during inspiration.

Question 19

What is the function of the purge valve on the Bunnell Life Pulse High-Frequency Jet Ventilator?

Accepted Answer

The purge port supplies gas to the purge valve,which is located in the patient box.The gas is used to provide a moisture-free environment in the monitoring line of the hi-lo jet tube.

Question 20

After an increase in the bias flow on a CareFusion 3100A,the airway pressure has increased. What is the most appropriate action?

Accepted Answer

If a change in the airway pressure occurs because another control has been adjusted,the mean pressure adjust control knob should be used to return the airway pressure to the desired level.

Quiz 14: Infant and Pediatric Devices