Evaluation of Cardiovascular Stents as Antennas for Implantable Wireless Applications

Chow, Eric Y.; Ouyang, Yi; Beier, Brooke L.; Chappell, William J.; Irazoqui, Pedro P.

doi:10.1109/tmtt.2009.2029954

Cited by 93 publications

(59 citation statements)

References 43 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…More elaborate experiments, also suitable to sensing applications, generally involve active or semiactive devices usually equipped with chemical or mechanical sensors [7], super capacitors or other components for energy harvesting. In general, RFID implants also suffer of poor link range [8] due the high loss affecting the electromagnetic interaction with the human body.…”

Section: Introductionmentioning

confidence: 99%

Feasibility, limitations and potentiality of UHF-RFID passive implants

Occhiuzzi

Simiele

Lodato

et al. 2012

2012 IEEE International Conference on RFID-Technologies and Applications (RFID-TA)

View full text Add to dashboard Cite

Abstract-Implanted RFID may play an important role in the personal Healthcare of next future. Antenna embedded into prosthesis or into other implanted medical devices could permit to monitor physiological and pathological processes, providing a natural interconnection to remote services. The big technical challenge is to establish a stable RFID link with the interior of the human body in spite of the high electromagnetic losses of the tissues. By using parametric electromagnetic models and some early result, it is here investigated the potentiality and limitation of the UHF implants with special attention to the body district, the overall mass, and the size of the antennas.

show abstract

Section: Introductionmentioning

confidence: 99%

Feasibility, limitations and potentiality of UHF-RFID passive implants

Occhiuzzi

Simiele

Lodato

et al. 2012

2012 IEEE International Conference on RFID-Technologies and Applications (RFID-TA)

View full text Add to dashboard Cite

show abstract

“…Since a vascular stent is typically fabricated with biocompatible metallic alloys, for instance the Nickel-Titanium (Nitinol) [24] with nice conducting features, some researchers have recently proposed to use the stent itself as a radiating elements to set-up a transcutaneous wireless telemetry system [25] where the status of the vessel is detected by a dedicated sensor integrated on board the stent. The idea to use the stent as sensor of restenosis has been instead investigated in [26], by relating the presence of cell proliferation and tissue growth to a low frequency (0.1 Hz to 10 MHz) impedance measurement.…”

Section: The Stentmentioning

confidence: 99%

“…As specified in Table I seven conditions have been TABLE I RE-STENOSIS: PROPERTIES simulated, starting from the blood, passing through the neointimal proliferation, down to a plaque restenosis. Finally, the meshed tubular part of the STENTag has been simulated as a continuous cylindrical surface as in [25].…”

Section: A Modelmentioning

confidence: 99%

Design of Implanted RFID Tags for Passive Sensing of Human Body: The STENTag

Occhiuzzi

Contri

Marrocco

2012

IEEE Trans. Antennas Propagat.

View full text Add to dashboard Cite

Abstract-Numerical processing of passive UHF-RFID tags' response may provide physical insight about the hosting object or about the nearby environment. This idea is here extended to implanted antennas with the purpose to sense the evolution of some human physiological and pathological process involving a local change of effective permittivity inside the body. The goal is to understand how master the design of this class of devices taking into account both communication and sensing capabilities. An ad hoc design methodology is here presented and discussed by means of a realistic medical case concerning the modification of an endo-vascular device to achieve a STENTag able to sense the state of the vessel wherein it has been implanted.Index Terms-Biosensor, implantable biomedical device, passive sensing, RFID.

show abstract

“…The overall efficiency of wireless powering depends on the rectification efficiency for a given frequency of powering, input power delivered, resonance and impedance mismatch losses, antenna geometry, and tissue losses. The effective power available at the rectifier input depends on multi path losses (~1-10dB for a range of 1-100cm, assuming a two-ray ground reflection model), skin attenuation based on implant depth (~5dB for 1-3mm below the skin, ~30dB for a depth of 3-5cms), antenna efficiency and matching losses (~5-10dB depending on frequency, antenna size and topology) [5]- [6].…”

Section: Headstage Design Considerationsmentioning

confidence: 99%

A generic miniature multi-feature programmable wireless powering headstage ASIC for implantable biomedical systems

Kubendran

Krishnan

Manola³

et al. 2011

2011 Annual International Conference of the IEEE Engineering in Medicine and Biology Society

View full text Add to dashboard Cite

Wireless powering holds immense promise to enable a variety of implantable biomedical measurement systems with different power supply and current budget requirements. Effective power management demands more functionality in the headstage design like power level detection for range estimation and power save modes for sleep-wake operation. This paper proposes a single chip ASIC solution that addresses these problems by incorporating digitally programmable features and thus has the potential to enable wireless powering for many implantable systems. The ASIC includes an RF rectifier which has a peak efficiency of 17.9% at 900 MHz and 11.0% at 2.4 GHz, a robust 1 V bandgap reference and LDO voltage regulator whose output can be programmed in the range of 1 V-1.5 V, and can drive upto 4 mA of load current. The input RF power level detector has a threshold of 1.6 V and the power management block can be programmed to give a 6%, 12.5% or 25% duty cycle power line to the transmitter resulting in upto 60% reduction in average power. The ASIC was fabricated using the TSMC 65 nm process, occupies 1mm(2) die area and the headstage consumes ~300 μA at 1.2V regulated supply.

show abstract

Evaluation of Cardiovascular Stents as Antennas for Implantable Wireless Applications

Cited by 93 publications

References 43 publications

Feasibility, limitations and potentiality of UHF-RFID passive implants

Feasibility, limitations and potentiality of UHF-RFID passive implants

Design of Implanted RFID Tags for Passive Sensing of Human Body: The STENTag

A generic miniature multi-feature programmable wireless powering headstage ASIC for implantable biomedical systems

Contact Info

Product

Resources

About