1. Wearable Ultrasound Comparison
7/11/2019
Wearable Ultrasound Comparison
Technical Parameters
SAM (Zetroz)
PainShield®
Frequency
3 MHz usage creates overheating and leads to possible wave reflection from bones
Prohibited by FDA to use near bones significantly narrowing product potential applications
90 kHz – may be used proximal to bones (no overheating)
Convenience of use
Transducer's requires gel (inconvenient, messy)
Cannot be used during sleep on such places as back (relatively thick and cumbersome)
Transmission gel free
Thin transducer allow convenient usage and use overnight also for facial pain (TN etc.)
Wound Healing
FDA prohibits placing ultrasound on the wounds - cannot be used for wound healing
Technology is applicable for wounds; transducer applied next to wound and SAW ultrasound travels through wound area
Device status
FDA clearance (2/14). No sales to date
FDA cleared. Launched in Sales commencing
Technology
Single Energy transmission - Basic US technology (smaller device)
Longitudinal waves
Dual Energy transmission mode - new class of Ultrasound
Surface Acoustic Waves (SAW) ultrasound increase treatment area around transducer
b) Longitudinal waves under transducer
Acoustic power
0.6W
0.4W
Transducer dimensions
Weight: 5g
Thickness: ~15mm (no exact data) 
Weight 3g
Thickness: 2mm 
Driver parameters
Battery powered / ~100 g
Battery powered / 54 g
Treatment area
~6cm2
Treatment area = transducer's area
~100cm2
Treatment area = 10cm radius around transducer
Treatment time
4 hours continuous
Intermittent 30 min. On / 30 min. Off; up to 6.5 hours