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Efficacy and safety: check...by using the right sensor solution Bram Stelt – Large Account Manager Booth: 551 Cell: +31(0) 6 2117 7287 bram@exergenglobal.com www.exergenglobal.com
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Requests from the market: -Increased speed -Increased quality -Guaranteed safety Downside: -Same or less budget -More challenging conditions TRENDS
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SOME EXAMPLES Picture: blood analysisPicture: digital printing Video: WeldingVideo: Flash CureWeldingFlash Cure
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The right sensor - simply not enough Innovative sensor technology Smart mechanical engineering teams and In depth know how of thermal processes APPROACH
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SENSORANICS METHODOLOGY
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SENSOR BY DESIGN………………THE PROCESS
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Velashape II CASE STUDY – COSMETIC INDUSTRY
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Potential Market for Fat Destruction Procedures In a survey of 1,045 women in NA 56% indicated interest in non-invasive fat destruction procedures Total Addressable Market in the US: 19.5M Patients World Market: $2b by 2017 ($ 700 mio in the US - Globaldata) MARKET SIZE
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Survey Takeaway: “Pain-free with no downtime, it’s effective and totally believable.” “Over 75% of patients come in to my office and immediately ask “How much is it going to hurt?" PAIN FREE TREATMENT - SAFETY
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PRINCIPLE OF OPERATION
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OBJECTIVE
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Next generation Velashape: -Pain free treatments -More efficient treatment -No downtime. Request -Non contact temperature sensor integrated in applicator for skin temperature monitoring -Closed loop RF mechanism to ensure reaching the set-point skin temperature for optimal treatment efficacy, and NOT exceed the set-point temperature for patient safety and comfort. OBJECTIVE SYNERON
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Our challenges: -Size – very limited space available -Direct IR lamp interference -Field of view – lens -Ambient temperature fluctuations -Gel applied on skin: thermal gradient. CHALLENGES
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Solution: Sensor selection: -Small size -Thermocouple compatible -Unpowered -No drift -High accuracy -High repeatibility -High interchangeability. OUR CHALLENGE: SIZE – VERY LIMITED SPACE AVAILABLE
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Direct influence from IR lamps: immediate sensor response when IR lamps were switched on – measurement error of approx 3C. OUR CHALLENGE: DIRECT IR LAMP INTERFERENCE
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Inner copper shroud blocking IR lamp radiation. Inner surface of shroud must be very low emissivity, otherwise the temperature of the shroud itself is measured. SOLUTION: DIRECT IR LAMP INTERFERENCE
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OUR CHALLENGE: FIELD OF VIEW - LENS
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SOLUTION: FIELD OF VIEW
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No Power Required T/C Compatible Compensates for the Ambient Temperature AMBIENT TEMPERATURE COMPENSATION
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ZnSe lens and window are not 100% transparent for IR radiation – some signal is absorbed: Sensor spectral response: 5.5 – 20 µm OUR CHALLENGE: BIG AMBIENT TEMPERATURE FLUCTUATIONS
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The thermopile detector is responsive to the net power that it absorbs: P = σ * A * (Tt 4 - Ta 4 ) The Stefan-Boltzmann equation where: -P = net radiation power -A = surface area -Tt = target temperature -Ta = detector temperature. Since the detector absorbs power at σ * A * (Tt 4 ) and re-radiates power at its own temperature, the σ * A * (- Ta 4 ) term is needed. Tt is attenuated by the additional lens and window attenuate Ta is unchanged: ambient compensation error OUR CHALLENGE: BIG AMBIENT TEMPERATURE FLUCTUATIONS
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1)Sensor thermally isolated: slower heat up and more uniform heating 2)Additional thermocouple to measure sensor housing temperature to allow accurate ambient temperature compensation 1. 1: solution that is provided to Syneron is under NDA and can not be disclosed here. The example given here is more general in nature but covers the concept SOLUTION: BIG AMBIENT TEMPERATURE FLUCTUATIONS
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mVo mV TC SOLUTION: BIG AMBIENT TEMPERATURE FLUCTUATIONS
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OUR CHALLENGE: GEL ON SKIN – THERMAL GRADIENT. SOLUTION: HEAT BALANCE
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The results for Tt=24C and Tt=59C. - IRt/c = Initial temp. in degC, - t/c = additonal t/c temp in degC, - Corrected: with ambient temperature compensation - Scaled: with heat balance. RESULTS
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VelaShape III Advantages Increased RF Power: - End point temperature is achieved much faster - Reduction in treatment time - Consistent, reproducible resultst Sophisticated Feedback Mechanisms: - New closed loop RF mechanism and built in temperature sensor - Better monitoring for elevated temperature in the tissue - Increased patient comfort and safety Movie Syneron Velashape
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Two important items I would like you to walk away with: 1. Market is very demanding and keeps on challenging the industry 2. There is always a solution if the thermal process is thoroughly understood – sensor by design. TO TAKE HOME
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THANK YOU – TIME FOR ? Bram Stelt – Large accountmanager Booth: 551 Cell: +31(0) 6 2117 7287 bram@exergenglobal.com www.exergenglobal.com www.sensoranics.com
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