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

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MTC’s Piezos Used for Wireless Power Transmission in EBR’s Wireless Pacemaker

Morgan Technical Ceramics (MTC) announced that its Bedford, Ohio site manufactures the piezoelectric ceramic materials used in EBR Systems, Inc.’s innovative new WiCS® Wireless Cardiac Stimulation System. The PZT (lead zirconate titanate) material made by MTC is critical to the efficiency of the WiCS system, which is powered by a battery with a 10-year lifespan.

The WiCS technology, which recently began clinical trials, is the first truly wireless pacing device. It was developed to eliminate cardiac pacing leads, historically a major source of complications and reliability issues. Read more…

 
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ST Microelectronics Developing Implantable SOCs

Medical Product Manufacturing News announced that ST Microelectronics is developing ultra-low-power Systems On Chip (SOCs) suitable for implantable medical devices.  ST Microelectronics’ 65nm features a Vt of only 0.6V that can be used very near threshold.  The REISC processor consumes barely 10.8pJ/cycle at 0.6V.  This type of technology will certainly enable many new implantable devices that must operate at extremely low powers and squeeze every bit of juice out of their batteries or energy-harvesting means.  Click here for link to article.

 
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Development and Test of MRI-Safe Implantable Devices

The November issue of Evaluation Engineering carried an article by Tom Lecklider on the amount of work invested by Medtronic to develop and test the Revo MRI pacemaker system.  The article is available on-line at Evaluation Engineering (Click here for direct link to the November 2011 issue).

 
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NEXUS Pacemaker with Hemodynamics Sensing and Patient Alert

(c) 2011 David Prutchi

Intermedics’ next-generation pacing platform would have been full of neat features such as: hemodynamic sensing (impedance-based hemodynamic sensor), autocapture (capture verification), autothreshold (self-tuning based on automatic strength-duration curve generation), high-quality digital telemetry, large-volume memory for electrogram storage, non-volatile memory for self-recovery and patient information, advanced noise detection, etc. My favorite feature though was “Patient Alert”. That saddle-shaped electrode in the picture was used to stimulate the patient’s pectoral muscles whenever the pacemaker wanted to alert the patient of a problem (e.g. low battery, fractured lead, etc.). The project was canceled when Guidant (now Boston Scientific) purchased Intermedics in 1998.

 

 

 
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Tantalus II System for Treating Metabolic Syndrome

MetaCure’s TANTALUS II device is an advanced implantable electrical stimulator used to apply gastric stimulation. It works by enhancing the activity of gastric muscles only when the patient eats, which modifies hormone secretion, favorably affecting glucose and fat metabolism. At the same time, the stimulation causes the patient to feel satiated sooner and consume less food. The result is an improvement in blood glucose levels, which is often accompanied by weight loss, and reduction of blood pressure, waist circumference and blood lipid level. Read more…

 
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Impulse Dynamics’ OPTIMIZER III IPG for Treatment of Heart Failure

Optimizer III Implantabe Pulse Generator for the treatment of congestive heart failureImpulse Dynamics’ OPTIMIZER™ III Implantable Pulse Generator delivers Cardiac Contractility Modulation (CCM), non-excitatory electrical signals during the myocardial absolute refractory period in synchrony with locally sensed electrical activity. CCM signals are intended to treat patients with symptomatic heart failure despite appropriate medical treatment. Read more…

 
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Welcome to implantable-device.com!

Welcome to implantable-device.com, a blog dedicated to professionals interested in the fascinating world of active implantable medical devices!

Let me tell you a bit about myself: I have over twenty years of experience in the design of Medical Electronic Instrumentation, most of it developing active implantable medical devices. In addition to 30 papers and 70 patents on implantable medical devices, I am the lead author of the books “Design and Development of Medical Electronic Instrumentation” and “Exploring Quantum Physics Through Hands-On Projects.”

Please contact me if you would like to contribute to the blog, correct information that you find in these pages, make a news release, or if you have a picture of an implantable device that you would like to share with everyone else.

I hope that you enjoy reading and participating in this blog!

David Prutchi

www.prutchi.com

 
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