theory

Ultrasound

Physics

 

Very high frequency sound waves

- 3 - 15 MHz

 

Production

 

Piezoelectric effect

- run electric current through a crystal

- produces ultrasound waves

 

Theory

 

Density of substance determines velocity of the US

- reflected back to the probe at different velocities

- converted into 2D image on monitor

 

 

Theory

Rotator Cuff Arthropathy for Reverse TSR

 

Indications

 

1.  RC arthropathy / > 70 / low functional demand

 

2.  Revision TSR

 

3.  Failed Hemiarthoplasty in proximal humerus fracture

 

Design

 

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