A ventilator's pressure waveform changes when a patient's lung mechanics change, but its vol-ume waveform remains the same. The device does not directly control the delivered volume. What is this ventilator?
a. Volume controller
b. Pressure controller
c. Time controller
d. Flow controller
ANS: D
If the ventilator controls flow, the flow and volume waveforms will remain consistent, but pres-sure will vary with changes in respiratory mechanics. Flow can be controlled directly using something as simple as a flow meter or as complex as a proportional solenoid valve. Flow can be controlled indirectly by controlling volume.
You might also like to view...
An unrestrained female patient, who was involved in a minor motor vehicle collision, refuses EMS care or transport. She is seven months pregnant and is alert and oriented. When asked, she denies any complaint. Your best action would be to:
A) have her follow up with her obstetrician. B) contact medical direction for instructions. C) make contact with her obstetrician. D) have the police witness her signing the refusal.
You respond to an accident in which a young male has sideswiped a tree on an expert trail. He has an abrasion on the left side of his face and neck and is spitting blood. He also lost several teeth, two of which he is holding. He has an airway and is breathing adequately. Your initial action when caring for the patient would be to:
a. get a SAMPLE history. b. establish manual in-line spinal stabilization. c. obtain and properly preserve the teeth. d. apply a pressure dressing to stop the bleeding.
Creutzfeldt-Jakob disease affects individuals by showing which of the following symptoms?
a. Rapidly progressing dementia b. Memory loss c. Speech impairment d. All of the above
The ________ notation provides you with additional terms and diagnoses that are included in the above code (this code's description).
A. Excludes1 B. Includes C. Code First D. Excludes2