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What are the 3 types of sound infrasound, audible sound, ultrasound
What is the frequency of ultrasound? greater than 20,000 hertz
What does RSI stand for? repetitive strain injuries
Where do we want our humerus bone when we are scan-
down by the side of your body
ning a patient in order to reduce ergonomic injuries?
using a keyboard or mouse for more than 4 hours a day,
repeatedly working with the hands above the head for
What are 3 common causes of repetitive strain injuries?
more than 2 hours a day, and using vibrating tools or
equipment for more than 2 hours a day
What does occupational injury risk factors mean? injuries acquired on the job
To prevent movement and bring organs in the body closer
to the surface and closer to the transducer what should hold their breath
you have the patient do?
What does MSI stand for? musculoskeletal injuries
Awkward physical positions of the sonographer and ma-
musculoskeletal injuries
chine might cause what kind of injuries?
-sitting with arm laterally outstretched for long periods of
time without elbow or shoulder support,
-scanning with neck twisted for extended periods, -tightly
What are 4 musculoskeletal injuries (MSIs): gripping the transducer for extended periods of time,
-performing portables in physically awkward positions
which do not allow close physical contact with the key-
board or monitor
1. pain
2. stiffness
What are 8 symptoms of work-related injuries? 3. numbness
4. decreased range of motion
5. tingling/burning
, DMS 400
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6. decreased grip strength
7. cramping
8. loss of muscle function
1. carpal tunnel syndrome
2. tension neck syndrome
3. shoulder bursitis
What are 7 injuries that are prolonged symptoms, but are
4. rotator cuff syndrome
not limited to:
5. tendonitis
6. low back pain
7. sciatica
True/False: You never want to have your scanning arm fully
true
extended while scanning.
If possible, adjust the height of the can table and/or chair
so that your arm can be positioned at how many degrees at or less than 45 degrees
from your body?
What does XDCR refer to? the transducer
True/False: In Ultrasound it is helpful to have artifacts? true
The science of tailoring the work environment to the work-
ergonomics
er to prevent injuries caused by wear and tear on the body.
What is the 3rd oldest imaging modality? ultrasound
When did the study of Ultrasound begin? 500 B.C.
Who began the study of Ultrasound and what was he? Pythagoras, a Greek mathematician
This person observed the relationship between sound
Pythagoras
pitch and frequency.
What is a sonometer? an instrument used to study musical sounds
Who invented the sonometer? Pythagoras
Aristotle