Lab 2: Intro to Ultrasound

Question 1

What is the purpose of the ultrasound gel

Answer 1

Reduce impedance between probe and skin

Question 2

What does the numbers on the probes mean

Answer 2

Indicates the frequency emitted by the probe

Higher number: better resolution but less penetrating depth into the tissue: musculoskeletal scanning

Lower number means less resolution but more penetration: Wide field of view for abdominal scanning

Question 3

What is the appearance of veins, arteries, muscle, bone and nerves on ultrasound

Answer 3

• Veins + Arteries are generally circles with dark (anechoic) in the middle. Artery is pulsing but vein is not.
• Muscle: lightish grey. Can see the muscle fibres depending on transverse or axial.
• Bone: white: hyperechoic

-Nerve has a white border but dark circles within it where the fibres are- bundle of grapes

Question 4

What does doppler effect colour do

Answer 4

Shows flow towards or away from the probe- however better when looking in parallel to the vessels- not perpendicular

Red: coming toward probe head
Blue: coming away from probe head.

Question 5

What is the maximum depth of structures you can see

Answer 5

The depth of the bone because underneath this the sound cannot penetrate