An Inductively Coupled RF System for the Transmission of 1 kW of Power Through the Skin

Schuder, John C.; Gold, Jerry H.; Stephenson, Hugh E.

doi:10.1109/tbme.1971.4502849

Cited by 79 publications

(26 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This frequency range enabled the development of a smaller, patient-compliant, implant coil (transmitter diameter, 5 cm; implant diameter, 3 cm). Unlike the findings of Schuder et al, 17 heat production is negligible because of the pulsed nature of the energy delivery (each pulse equates to 1 delivered shock).…”

Section: Transcutaneous Rf Energy Transfermentioning

confidence: 66%

“…Transfer of energy through the skin uses an external coil system to transmit and a stand-alone (passive) internalized coil system to receive the energy (magnetic pulse field) 17,18 via an inductive link. 18 -20 The PIAD uses an "on-off" pulsed RF power source operating at 7.2 MHz and connected to an RF transformer.…”

Section: Passive Implantable Atrial Defibrillatormentioning

confidence: 99%

“…Schuder et al, 17 in 1971, first described high-energy transcutaneous RF energy transfer (1 kW) using continuous RF power at 428 kHz to an implanted coil device (11 cm diameter) and a similarly sized transmitter coil (watercooled) in a dog model. The authors proposed that the resultant energy might be used to recharge batteries for implanted artificial hearts.…”

Section: Transcutaneous Rf Energy Transfermentioning

confidence: 99%

See 2 more Smart Citations

Novel Passive Implantable Atrial Defibrillator Using Transcutaneous Radiofrequency Energy Transmission Successfully Cardioverts Atrial Fibrillation

Manoharan

Evans²,

Kidwai³

et al. 2003

Circulation

View full text Add to dashboard Cite

Background-Conventional methods for cardioversion of atrial fibrillation (AF) to sinus rhythm have numerous difficulties. A novel method for cardioversion using the passive implantable atrial defibrillator (PIAD) was tested in acute animal models. This device does not have a battery or a capacitor to store energy and is activated by transferring RF energy across the skin from an external transmitter to the subcutaneously implanted defibrillator. On activation, a novel monophasic shock waveform with 5% tilt is delivered to the heart via 2 intracardiac defibrillation leads. Methods and Results-Cardioversion attempts with the device were assessed in 2 phases: a feasibility and efficacy study and randomized comparison against standard waveforms. Defibrillation leads were placed transvenously into the distal coronary sinus and the right atrial appendage. These were connected to the subcutaneously implanted PIAD. Sustained AF was induced by rapid atrial pacing. The transmitter coil was placed on the skin overlying the defibrillator, and defibrillation synchronized to the R wave was attempted. The method was found to be efficacious at very low voltage and energy, with 100% cardioversion success observed for 10-ms 100-V shocks (mean energy, 1.54Ϯ0.02 J). The PIAD waveform had a higher cardioversion success rate than a truncated, 70% tilt monophasic exponential pulse (100 V, 100% versus 78.0Ϯ7.57%; Pϭ0.001). There were no postshock complications. Conclusions-Considering these animal results, this method is promising for cardioverting AF in symptomatic patients.

show abstract

Section: Transcutaneous Rf Energy Transfermentioning

confidence: 66%

Section: Passive Implantable Atrial Defibrillatormentioning

confidence: 99%

Section: Transcutaneous Rf Energy Transfermentioning

confidence: 99%

See 1 more Smart Citation

Novel Passive Implantable Atrial Defibrillator Using Transcutaneous Radiofrequency Energy Transmission Successfully Cardioverts Atrial Fibrillation

Manoharan

Evans²,

Kidwai³

et al. 2003

Circulation

View full text Add to dashboard Cite

show abstract

“…Magnetic resonance was used in this WPT. Transistor-based astable multivibrator used in 1968 for WPT [16] 1971: With a pair of much larger spiral coil made of Litz wires, John Schuder's team continued their research by transferring 1 kW through the skin of a dog (thickness of 7.5 mm) [17]. It is interesting to note that they have considered the tissue conductivity, inductance and capacitance under an operating frequency of 480 kHz.…”

Section: ) Examples Of Wpt Research Conducted By the Bio-medical Resmentioning

confidence: 99%

Magnetic Resonance for Wireless Power Transfer [A Look Back]

Hui

2016

IEEE Power Electron. Mag.

View full text Add to dashboard Cite

Abstract:Magnetic resonance has been a cornerstone of non-radiative wireless power transfer (WPT) since the late 19 th century. Yet, there has been a misconception among some researchers who think magnetic resonance for WPT was developed recently. This article traces some early work of Tesla and other researchers related to the use of magnetic resonance in WPT. Some examples of magnetic resonance based WPT projects conducted by researchers in the biomedical and power electronics communities over last few decades are included. The article re-iterates two principles used in WPT and addresses their advantages and disadvantages. Some issues that may affect future trends of short-range and mid-range applications are addressed.

show abstract

“…The portion of the electric energy not transmitted to the internal coil is lost in the internal resistance of the power source or electrical wire. To reduce this power loss and thus increase the transmission power, internal and external TET coils are used in resonant circuits, and TET operates at its resonance frequency [1], [5]. This basic TET concept has high energy transmission capability, but the output voltage changes markedly according to the load resistance [1], [2].…”

Section: Introductionmentioning

confidence: 99%

Coil-Capacitor Circuit Design of a Transcutaneous Energy Transmission System to Deliver Stable Electric Power

Choi

Lee²

2008

ETRI Journal

View full text Add to dashboard Cite

A new transcutaneous energy transmission (TET) system was developed for transmitting electrical power to an implanted device, such as an artificial heart in a patient's body. This new design can maintain a stable output voltage independent of the load resistance. The system includes a compensation capacitor to reduce energy loss and increase power transfer efficiency. Experimental results show that the output voltage of the receiving coil changes very little as the load resistance varies from 14.8 Ω to 15 kΩ, which corresponds to a change in output power from 0.1 to 97 W.

show abstract

An Inductively Coupled RF System for the Transmission of 1 kW of Power Through the Skin

Cited by 79 publications

References 3 publications

Novel Passive Implantable Atrial Defibrillator Using Transcutaneous Radiofrequency Energy Transmission Successfully Cardioverts Atrial Fibrillation

Novel Passive Implantable Atrial Defibrillator Using Transcutaneous Radiofrequency Energy Transmission Successfully Cardioverts Atrial Fibrillation

Magnetic Resonance for Wireless Power Transfer [A Look Back]

Coil-Capacitor Circuit Design of a Transcutaneous Energy Transmission System to Deliver Stable Electric Power

Contact Info

Product

Resources

About