A portable microsystem-based telemetric pressure and temperature measurement unit

Flick, B.B.; Orglmeister, Reinhold

doi:10.1109/10.817613

Cited by 33 publications

(14 citation statements)

References 11 publications

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“…These applications are primarily grouped into two main categories: physiologicalparameter monitoring (for diagnostic purposes) and stimulation (actuation, in general) [27]. Instances of the former are devices measuring body temperature [33], blood pressure [13], blood-glucose concentration [25], gastric pressure [28], tissue bio-impedance [22] and more. In the latter category belong implantable pacemakers [5,16] and implantable intracardiac defibrillators (ICDs) [31], various functional electrical stimulators for paralyzed limbs [26], for bladder control [23], for blurred cornea in the eye [24] and more pathoses.…”

Section: Introductionmentioning

confidence: 99%

Profiling of symmetric-encryption algorithms for a novel biomedical-implant architecture

Strydis

Zhu

Gaydadjiev

2008

Proceedings of the 5th Conference on Computing Frontiers

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Starting with the implantable pacemaker, microelectronic implants have been around for more than 50 years. A plethora of commercial and research-oriented devices have been developed so far for a wide range of biomedical applications. In view of an envisioned expanding implant market in the years to come, our ongoing research work is focusing on the specification and design of a novel biomedical microprocessor core, carefully tailored to a large subset of existing and future biomedical applications. Towards this end, we have taken steps in identifying various tasks commonly required by such applications and profiling their behavior and requirements. One such task is decryption of incoming commands to an implant and encryption of outgoing (telemetered) biological data. Secure bidirectional information relaying in implants has been largely overlooked so far although protection of personal (biological) data is very crucial. In this context, we evaluate a large number of symmetric (block) ciphers in terms of various metrics: average and peak power consumption, total energy budget, encryption rate and efficiency, program-code size and security level. For our study we use XTREM, a performance and power simulator for Intel's XScale embedded processor. Findings indicate the best-performing ciphers across most metrics to be MISTY1 (scores high in 5 out of 6 imposed metrics), IDEA and RC6 (both present in 4 out of 6 metrics). Further profiling of MISTY1 indicates a clear dominance of load/store, move and logic-operation instructions which gives us explicit directions for designing the architecture of our novel processor.

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Section: Introductionmentioning

confidence: 99%

Profiling of symmetric-encryption algorithms for a novel biomedical-implant architecture

Strydis

Zhu

Gaydadjiev

2008

Proceedings of the 5th Conference on Computing Frontiers

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“…This section looks at the various approaches that have been taken in academia and industry. Although the pressure sensing techniques and considerations reviewed in this paper are suitable for other applications including the long-term measurement of intraocular (Frischholz 2006;Scknakenberg et al 2000), intracranial (Frischholz 2006;Banister et al 2000;Flick and Orglmeister 2000) and bladder pressures (Siwapornsathain et al 2002;Coosemans and Puers 2005), only the work related to blood pressure measurement is reviewed in this paper.…”

Section: Intra-arterial Blood Pressure Monitorsmentioning

confidence: 98%

Long term, implantable blood pressure monitoring systems

Potkay

2007

Biomed Microdevices

101

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An overview of implantable measurement systems suitable for the long-term, continuous monitoring of blood pressure is presented in this paper. The challenges, design considerations and tradeoffs inherent in these systems are overviewed and implantable sensors from both industrial and research environments are reviewed. The paper is concluded with an outlook of future directions for implantable blood pressure monitoring systems.

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“…Currently, major challenges of implantable microsystems for chronic longterm use come from reliability, packaging, biocompatibility, absence of a mass market driver and long development time (Mokwa 2007;Receveur et al 2007;Ainslie and Desai 2008). Short or long-term implantable pressure sensors have been used to measure intra-ocular pressure (IOP) (Backlund et al 1990;Mokwa and Schnakenberg 1998;Puers et al 2000), intro-cranial pressure (ICP) (Cosman et al 1979;Flick and Orglmeister 2000), cardio vascular pressures (Puers et al 1990;Xiao et al 1997;Kalvesten et al 1998;Schnakenberg et al 2004;Allen 2005;Ohki et al 2007), and urodynamic pressure, etc. The goal of this study was to develop an implantable pressure sensor on LVAD inlet to measure LVP using Micro-Electro-Mechanical Systems (MEMS) technology.…”

Section: Introductionmentioning

confidence: 98%

An implantable Fabry-Pérot pressure sensor fabricated on left ventricular assist device for heart failure

Zhou

Yang

Liu

et al. 2011

Biomed Microdevices

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Continuous flow left ventricular assist devices (LVADs) are commonly used as bridge-to-transplantation or destination therapy for heart failure patients. However, non-optimal pumping speeds can reduce the efficacy of circulatory support or cause dangerous ventricular arrhythmias. Optimal flow control for continuous flow LVADs has not been defined and calls for an implantable pressure sensor integrated with the LVAD for real-time feedback control of pump speed based on ventricular pressure. A MEMS pressure sensor prototype is designed, fabricated and seamlessly integrated with LVAD to enable real-time control, optimize its performance and reduce its risks. The pressure sensing mechanism is based on Fabry-Pérot interferometer principle. A biocompatible parylene diaphragm with a silicon mirror at the center is fabricated directly on the inlet shell of the LVAD to sense pressure changes. The sensitivity, range and response time of the pressure sensor are measured and validated to meet the requirements of LVAD pressure sensing.

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A portable microsystem-based telemetric pressure and temperature measurement unit

Cited by 33 publications

References 11 publications

Profiling of symmetric-encryption algorithms for a novel biomedical-implant architecture

Profiling of symmetric-encryption algorithms for a novel biomedical-implant architecture

Long term, implantable blood pressure monitoring systems

An implantable Fabry-Pérot pressure sensor fabricated on left ventricular assist device for heart failure

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