A blog about what is new (and old) in the world of active implantable medical devices 

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Home Technologies Archive for category "Wireless Power Transmission"
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Pacesetter’s 1973 Rechargeable Pacemaker

Yesterday I visited the Udvar-Hazy Center of the Smithsonian Air & Space Museum in Chantilly, VA.  There I found this demo rechargeable pacemaker being displayed as a spinoff of NASA’s technology with the following explanation: I can’t remember exactly where I found the picture of a Pacesetter model BD102 VVI, but the story behind it

 
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Increase in Temperature from AIMDs Dissipating Endogenous Heat

Active Implantable Medical Devices generate heat as a result of resistive losses in their circuitry, exothermic reaction in their batteries, eddy-current heating due to inductive recharge, friction between mechanical components, etc.  The European Standard which regulates AIMDs limits the heating of the outer surface of an AIMD to 2ºC above normal body temperature.  Despite the

 
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WiTricity Developing Long-Range Transcutaneous Energy Transfer Solutions for AIMDs

This month’s Medical Device and Diagnostic Industry  (MD+DI) magazine carried an interesting article by David Schatz – WiTricity’s VP Sales – on their efforts to develop highly resonant wireless power transfer technology for use in AIMDs.  The article is available online at http://www.mddionline.com/article/wireless-power-medical-devices. The article mentions the work that WiTricity has been doing with Thoratec to

 
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IEEE Summer School on Implantable Devices – Bogotá, Colombia (July 9 – 12, 2013)

I have been honored with an invitation to present at the  Fourth IEEE CASS Summer School on Wearable and Implantable Biomedical Circuits and Systems in Bogotá, Colombia (July 9 – 12, 2013). I will be giving two 1 hour and 20 minute talks on “A Practical Perspective on Developing Novel Commercial Active Implantable Medical Devices”. 

 
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Magnetically-Coupled Motor/Generator Transfers 100 mW to Implant at 50 cm Range

Scientists at the Fraunhofer Institute for Ceramic Technologies and Systems developed a magnetically-coupled motor/generator system that they claim is able to transcutaneously transfer 100 mW to an implant up to 50 cm away. In the external power-transfer module, a rotating magnet driven by an EC motor generates a magnetic rotary field. A magnetic pellet in

 
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News from Stanford: Modelling Tissue as a Dielectric Shows Feasibility of Inductive Power Transfer at 1 GHz

Stanford Engineering assistant professor  Ada Poon demonstrated a tiny, wirelessly powered, self-propelled medical device capable of controlled motion through blood.  The device drives electrical current directly through the fluid, which in the presence of an external magnetic field creates a directional force that pushes the device forward. This type of device is capable of moving at

 
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Purdue University’s Concept for Music-Powered Implantable Devices

  A group of researchers at Purdue University led by Prof. Babak Ziaie developed a vibrating cantilever that is excited by an external bass source from 200-500 Hz. The excitation causes the cantilever to vibrate, generating electricity and storing a charge in a capacitor. Although playing tones within a certain frequency range would be ideal, the

 
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Neuromed’s TIME Battery- and RF-Powered Totally Implantable Multichannel Spinal Cord Stimulator (ca. 1988)

Neuromed was formed in 1980 with an initial capitalization of $150,000 by Bill Borkan through money obtained when Borkan`s parents took out a second mortgage on their home. Borkan’s desire to help his sister, Jennie, a cerebral palsy patient, got him started in neurostimulation technology. In the next few years, Neuromed developed and marketed a

 
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St. Jude’s (ANS) Rechargeable Spinal Cord Stimulators Eon and Eon Mini

In 2005, St. Jude Medical purchased Advanced Neuromodulation Systems (ANS) in Plano, Texas.  ANS had developed a number of spinal cord stimulation IPGs that were either externally powered via inductive link, internally powered by a primary cell, or internally powered by a transcutaneously rechargeable lithium-ion cell. Today, the most popular St. Jude spinal cord stimulators are the rechargeable

 
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NDI Medical’s Miniature MicroPulse Neurostimulator

Image Credit: SPR Therapeutics NDI Medical was founded in 2002 by Geoffrey B. Thrope to develop and commercialize neurodevice products.  NDI Medical developed the MicroPulse neurostimulator, a thumb-sized, rechargeable pulse generator, that has been used for the treatment of incontinence and pain, as well as an implantable device for the restoration of function of paralyzed limbs. According to a 2006

 
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Nevro’s Senza Rechargeable Spinal Cord Stimulator for Back and Leg Pain

Image Source: Nevro’s Website Nevro Corporation (formerly NBI Development) was founded in 2006 by Dr. Konstantinos Alataris.  The Menlo Park, CA company developed a pain management concept that originated at the Mayo Clinic into a spinal cord stimulation system for back and leg pain. According to Nevro, their unique stimulation waveform achieves pain relief without paresthesia or uncomfortable stimulation.  Few details

 
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EBR System’s Wireless Pacemaker

EBR Systems, Inc., founded in 2003 and headquartered in Sunnyvale, CA, is developing the WiCS® Wireless Cardiac Stimulation technology to eliminate cardiac pacing leads, historically a major source of complications and reliability issues.  The startup was spun out of research by founder Debra Echt, a former professor of medicine and a cardiologist at Vanderbilt University.

 
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CCC Medical – Top OEM to AIMD Start-Ups

CCC is one of the oldest pacemaker manufacturers in the world. It was founded in 1969 by Dr. Orestes Fiandra, who performed the first succesful, human, long-term pacemaker implant in the world. This was achieved in Uruguay on February 2, 1960 by Dr. Orestes Fiandra and Dr. Roberto Rubio. The pacemaker was manufactured by Dr. Rune Elmqvist of

 
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MicroTransponder’s Injectable Stimulators

    MicroTransponder was founded in Dallas, TX in  2007 when it licensed technology developed at University of Texas in Dallas (UTD) by Larry Cauller, who heads the cortical connections lab. The first wireless transponder was developed under a DARPA Revolutionizing Prosthetics grant to create a bi-directional neural interface for a prosthetic hand.

 
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Enopace Biomedical

Enopace Biomedical Ltd. was founded in 2008 by Yossi Gross in Caesarea, Israel. Very scant details are available besides that it is developing a neuromodulation system to treat patients with congestive heart failure. According to the company, its technology consists of a minimally invasive, implantable neurostimulation device that increases cardiac efficiency by reducing left ventricular workload. From Enopace’s patent

 
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