Medical Machienes

Question 1

Spirometer

Answer 1

-an apparatus for measuring the volume of air inspired and expired by the lungs
-meausre ventilation, the movement of air into and out of the lungs
-identifies 2 types of abnormal ventilation patterns

Question 2

Position emission tomography (PET)

Answer 2

-scan that uses a dye that has radioactive tracers, get absorbed by your organs and tissues
- the tracer will collect into areas of your body that have higher levels of metabolic or biochemical activity which can locate area of disease

Question 3

Cell culture technology

Answer 3

-isolate cells from a person/animal, keep them alive in culture(skin,blood,bone marrow cells)
-allows us to understand how human cells work and the functioning of human organisms
-can be used to replicate or regenerate these cells

Question 4

Measurand

Answer 4

physical quanity being measured by the instrument
-internal(blood pressure),surface(ECG)

Question 5

Sensor

Answer 5

a device that converts measurand to electric signals
-should only respond to the form of energy in the measurand
-should be minimally invasive

Question 6

Signal conditioning

Answer 6

-sensor output not directly couples to the display device
-amplifiaction,filtering
-averaging, digitizing, processing

Question 7

Output display

Answer 7

-numerical, graphical, discrete, continuous
-human factors engineering guidelines

Question 8

auxiliary elements

Answer 8

calibration and control and feedback

Question 9

Constraints of biomedical measurement

Answer 9

-low magnitude of biological signals
-access constraint (invasive vs. non-invasive measurement)
-safety issues
-Stochastic physical quantity

Question 10

Any measurement includes?

Answer 10

Signal and noise

Question 11

Signal

Answer 11

ECG, blood pressure, temperature

Question 12

Noise

Answer 12

External: 60Hz, radio frequency,magnetic
Internal : muscle noise, motion artifact

Question 13

Signal filtering

Answer 13

can seperate noise from desired signal using their distinct property
-Seperate high frequency from low

Question 14

Analog filters

Answer 14

have the property of removing unwanted frequencies from our signal