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 2010. 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