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Use of Wi‐Fi power in the Operating Room Disclosure Number: IPCOM000243537D
Publication Date: 2015-Sep-29
Document File: 2 page(s) / 123K

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Powered surgical devices (ultrasonic, RF, microwave, IRE, thermal, etc.; staplers) require energy in order to perform as needed. As devices become more sophisticated, more sensors, transducers, and communication topologies will be implemented in these devices. All of these items require electricity, and getting DC power to its final destination can be difficult to implement. Ergonomics (cable thickness), waste (batteries, power loss in cables), electrical noise, legacy generator design (lack of DC power supply or communications), and other factors, cause difficulties in providing power to these instruments and sensors. Wireless power delivery is becoming a reality with orthogonal frequency division multiplexing (OFDM) waveform through Wi-Fi emitters. As this one method becomes a possibility, future methods will also be developed. Wireless power delivery requires circuitry to receive, deliver, and (if necessary) store electricity. Wirelessly-delivered power could allow for many of the current, limiting factors to be lifted in the operating room. Surgical instruments could have sensors, transducers, switches, and possibly even powered, through wireless power delivery. The use of multiple instruments that are not physically connected, could communicate without the need for DC power lines. This greatly improves ergonomics of the powered tools used in the operating room.

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Use of Wi‐Fi power in the Operating Room 


Powered surgical devices (ultrasonic, RF, microwave, IRE, thermal, etc.; staplers) require energy in order  to perform as needed. As devices become more sophisticated, more sensors, transducers, and  communication topologies will be implemented in these devices. All of these items require electricity,  and getting DC power to its final destination can be difficult to implement. Ergonomics (cable thickness),  waste (batteries, power loss in cables), electrical noise, legacy generator design (lack of DC power supply  or communications), and other factors, cause difficulties in providing power to these instruments and  sensors. 

Wireless power delivery is becoming a reality with orthogonal frequency division multiplexing (OFDM)  waveform through Wi‐Fi emitters.  As this one method becomes a possibility, future methods will also  be developed. Wireless power delivery requires circuitry to receive, deliver, and (if necessary) store  electricity. Wirelessly‐delivered power could allow for many of the current, limiting factors to be lifted in  the operating room. Surgical instruments could have sensors, transducers, switches, and possibly even  powered, through wireless power delivery. The use of multiple instruments that are not physically  connected, could communicate without the need for DC power lines. This greatly improves ergonomics  of the powered tools used in the operating room. 



Research associates at the University of Washington have demonstrated the capability to use an  orthogonal frequency division multiplexing (OFDM) waveform on standard Wi‐Fi emitters.  This is done  broadcasting a "continuous" transmission across multiple channels. A receiving unit is designed to  receive on all of the individual channels. Their prototype devices were able to be completely free of  batteries (Wi‐Fi triggers the system in a dormant state which effectively turns it on).  

Upon receiving the power, there's multiple ways in order for it to power DC components. This can be  done using rectifiers, capacitors, super‐capacitors, and even some regulators. After this initial stage, a  second stage using a DC to DC converter is normally advisable to ensure appropriate voltages to power  any electronics. 

Potential Flow Chart: 

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Wi‐Fi rec...