Chapter 2; How Ventilators Work

Chapter 2; How Ventilators Work

Complete Chapter Questions With Answers

Sample Questions Are Posted Below

MULTIPLE CHOICE

1. The respiratory therapist enters modes and parameters into the ventilator with which of the following?

ANS:   C

The user interface or control panel contains certain knobs, dials, or keypads where the ventilator operator sets or enters certain information to establish how the pressure and pattern of gas flow is delivered by the machine. Inside the ventilator is the control logic or control system which interprets the operator settings and produces and regulates the desired output. The input power is the ventilator’s power source that provides the energy to enable the ventilator to perform the work of ventilating the patient. The drive mechanism is a mechanical device that produces gas flow to the patient.

DIF:    1                      REF:    pg. 18

2. Which of the following ventilators is pneumatically powered?

ANS:   B

The Bio-Med MVP-10 is a fluidic ventilator and uses only gases for its operation. The LTV 1000, Lifecare PLV-102, and Intermed Bear 33 are electrically controlled and powered ventilators.

DIF:    1                      REF:    pg. 18

3. A patient being transferred from a hospital to a skilled nursing facility requires mechanical ventilation with a fractional inspired oxygen (F_IO₂) of 0.21. The skilled nursing facility has no piped in gases. Which of the following ventilators will be able to function in the skilled nursing facility without any extra equipment?

ANS:   B

The type of ventilator that will be appropriate for this situation is one that is electrically controlled and powered with a built-in air compressor. The LTV 1000 fits this description. The Servoⁱ requires both a high-pressure gas source as well as electrical power. The Bird Mark 7 is a pneumatic ventilator and will not be able to function in this situation. The Bio-Med MVP-10 is also a pneumatic ventilator that won’t function in this situation.

DIF:    2                      REF:    pg. 18

4. The internal circuit of a ventilator allows the gas to go directly from its power source into the patient. This is known as which of the following?

ANS:   A

There are two types of internal circuits, the single- and the double-circuit. The single-circuit allows the gas to flow from its power input source to the patient. The double-circuit utilizes a primary power source to generate a gas flow that compresses a mechanism such as a bellows. The gas within the bellows will then flow to the patient. Open and closed loop refer to the absence or presence, respectively, of a feedback loop system.

DIF:    1                      REF:    pg. 21