Thoracic ultrasound Flashcards
What is the most common form of ultrasound?
2D or B mode
3.5Mhz probe is?
Curved array probe - used to see diaphragm.
Low frequency - but great depth of view
7-12 Mhz probe?
Linear probe.
High frequency but limited depth of view
A white line on the thorax is?
Artefact from visceral and parietal pleura
Gliding pleura/sliding lung is good
T
Ultrasound, white lines under pleural line? (running parallel to pleural line but not as white?)
A lines - they are artefacts
What are interlobular septa represented by?
B lines which run perpendicular to lung edge
What do interlobular septa lie between?
Secondary pulmonary lobules
What can M mode ultrasounds do?
They give a 1 dimensional display of motion (M) of echo-producing interfaces against time
What signals a healthy lung in an M mode ultrasound?
Seashore line
What plane is ultrasound good to do for thorax?
Paracoronal or parasagittal.
It eliminates rib artefact
In a sagittal plane/longitudinal plane, describe caudal and cranial positions.
Cranial = left
Caudal = right
2 uses of thorax ultrasound
Detect pleural effusion, assess respiratory muscle function
Name some accessory muscles involved in breathing.
Sternocleidomastoid, scalenes, serratus, pectorals
During inspiration, what does the SCM and scalene do?
Contract and elevate ribs - move sternum anteriorly
