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Related Concept Videos

Maximum Power Transfer01:16

Maximum Power Transfer

Numerous practical applications within engineering disciplines, such as telecommunications, necessitate optimizing power delivery to a connected load. This pursuit, however, entails inherent internal losses, which can either equal or exceed the power supplied to the load. The Thevenin equivalent circuit is helpful in finding the maximum power a linear circuit can deliver to a load. It is assumed in this context that the load resistance can be adjusted.
By substituting the entire circuit with...
Charging Conductors By Induction01:15

Charging Conductors By Induction

The Earth is a good conductor of electricity, and it is so big that it can be considered an infinite source or sink of charges. It can easily exchange charges with any matter.
Generally, conductors like metals do not allow any excess charge to be present on them. Any excess charge added to metals easily flows away, for example, when a metal is placed on the Earth. This process is called earthing.
However, conductors can be charged by a process called induction. For example, consider charging a...
Energy Stored In A Coaxial Cable01:31

Energy Stored In A Coaxial Cable

A coaxial cable consists of a central copper conductor used for transmitting signals, followed by an insulator shield, a metallic braided mesh that prevents signal interference, and a plastic layer that encases the entire assembly.
In the simplest form, a coaxial cable can be represented by two long hollow concentric cylinders in which the current flows in opposite directions. The magnetic field inside and outside the coaxial cable is determined by using Ampère's law. The magnetic field inside...
Induced Electric Fields: Applications01:27

Induced Electric Fields: Applications

An important distinction exists between the electric field induced by a changing magnetic field and the electrostatic field produced by a fixed charge distribution. Specifically, the induced electric field is nonconservative because it does not work in moving a charge over a closed path. In contrast, the electrostatic field is conservative and does no net work over a closed path. Hence, electric potential can be associated with the electrostatic field but not the induced field. The following...
Transdermal Drug Delivery Systems01:18

Transdermal Drug Delivery Systems

Transdermal drug delivery systems (TDDS) enable the controlled release of drugs across the skin into systemic circulation. They are particularly advantageous for drugs with short half-lives or narrow therapeutic indices, as they maintain consistent plasma concentrations and reduce the risk of subtherapeutic or toxic levels.TDDS are categorized into monolithic, reservoir, and mixed systems. Monolithic systems embed the drug in a polymer matrix, where diffusion governs release. Reservoir systems...
Magnetic Field Due To A Thin Straight Wire01:27

Magnetic Field Due To A Thin Straight Wire

Consider an infinitely long straight wire carrying a current I. The magnetic field at point P at a distance a from the origin can be calculated using the Biot-Savart law.

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Hollow Microneedle-based Sensor for Multiplexed Transdermal Electrochemical Sensing
08:19

Hollow Microneedle-based Sensor for Multiplexed Transdermal Electrochemical Sensing

Published on: June 1, 2012

Multi-layer coils for efficient Transcutaneous Power Transfer.

N Sertac Artan1, Xiaonin Li, Ramesh Patel

  • 1Electrical and Computer Engineering Department, Polytechnic Institute of New York University, USA.

Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual International Conference
|January 19, 2012
PubMed
Summary
This summary is machine-generated.

Multi-layer coils significantly enhance Transcutaneous Energy Transfer Systems (TETS) for medical implants. This innovation extends safe power delivery duration by up to 16x, overcoming efficiency limitations and temperature concerns without increasing coil size.

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Area of Science:

  • Biomedical Engineering
  • Implantable Devices
  • Energy Transfer

Background:

  • Transcutaneous Energy Transfer Systems (TETS) power medical implants but suffer from low efficiency and heat generation.
  • Increased coil diameter can improve efficiency but is often limited by physical constraints.

Purpose of the Study:

  • To investigate the use of multi-layer coils as secondary coils in TETS to improve power transfer efficiency.
  • To enable safe, high-power delivery for medical implants over extended periods.

Main Methods:

  • Implemented multi-layer coils as secondary coils in a TETS setup.
  • Experimentally evaluated power transfer efficiency and skin temperature increase under varying coil alignment conditions.
  • Compared performance against traditional single-layer coils.

Main Results:

  • Multi-layer coils increased the duration of safe power delivery (skin temperature < 2°C) by 5x, even with 50% coil misalignment.
  • With aligned coils, the safe power delivery duration increased over 16x.
  • These improvements were achieved without increasing coil diameter, maintaining a 2 mm coil thickness.

Conclusions:

  • Multi-layer secondary coils offer a viable solution to enhance TETS efficiency and safety for medical implants.
  • This approach overcomes the limitations of coil size constraints and improves thermal management.
  • Enables longer and safer operation of high-power medical implantable devices.