Implantable Sensor System for Remote Detection of a Restenosis Condition

Miguel, José; Lechuga, Y.; Mozuelos, R.; Martínez, Mar

doi:10.1007/978-3-642-37291-9_18

Cited by 4 publications

(2 citation statements)

References 7 publications

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“…Several studies [ 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 ] have all attempted to find reliable ways of diagnosing ISR by integrating additional components onto the stent. Due to restenosis, there is a local increase in pressure within the stent and this can be detected by a pressure sensor.…”

Section: Imds In Cardiovascular Diseasementioning

confidence: 99%

Future of Smart Cardiovascular Implants

Bussooa

Neale

Mercer

2018

Sensors

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Cardiovascular disease remains the leading cause of death in Western society. Recent technological advances have opened the opportunity of developing new and innovative smart stent devices that have advanced electrical properties that can improve diagnosis and even treatment of previously intractable conditions, such as central line access failure, atherosclerosis and reporting on vascular grafts for renal dialysis. Here we review the latest advances in the field of cardiovascular medical implants, providing a broad overview of the application of their use in the context of cardiovascular disease rather than an in-depth analysis of the current state of the art. We cover their powering, communication and the challenges faced in their fabrication. We focus specifically on those devices required to maintain vascular access such as ones used to treat arterial disease, a major source of heart attacks and strokes. We look forward to advances in these technologies in the future and their implementation to improve the human condition.

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Section: Imds In Cardiovascular Diseasementioning

confidence: 99%

Future of Smart Cardiovascular Implants

Bussooa

Neale

Mercer

2018

Sensors

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“…For early diagnosis of restenosis and real-time monitoring of intravascular blood conditions, smart stents or intelligent stents have been developed by integrating versatile sensors and wireless electronic systems with stents, as shown in Figure 1 [9,10]. For example, pressure sensors are used to measure intravascular blood pressure [9,11,12,13,14,15,16], multiple pressure sensors are used to measure the pulse wave velocity (PWV) [17], flow sensors can provide blood flow velocity [2,18,19], and other embedded sensors are utilized to monitor glucose [20] and temperature [19]. In fact, measuring blood pressure intravascularly, directly from blood vessels, provides accurate and real-time values of blood pressure that are superior to those of non-invasive blood-pressure approaches such as ultrasound [21], the volume-clamp method [22].…”

Section: Introductionmentioning

confidence: 99%

A Single-Connector Stent Antenna for Intravascular Monitoring Applications

Liu

Chen

Hsiao

2019

Sensors

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Recently, smart stents have been developed by integrating various sensors with intravascular stents for detecting vascular restenosis or monitoring intravascular biomedical conditions such as blood pressure or blood flow velocity. The information on biomedical signals is then transmitted to external monitoring systems via wireless communications. Due to the limited volumes of blood vessels and limited influence of blood flow, antennas with good radiation performance are required for intravascular applications. In this paper, we propose a stent antenna composed of multiple rings containing crowns and struts, where each ring is connected with one connector. Unlike a conventional stent, wherein each ring is connected with several connectors, the single connector prevents the random distribution of electrical current and thus achieves good radiation performance. The implantable stent antenna is designed for the frequency range of 2 to 3 GHz for minimum penetration loss in the human body and tissues. Mechanical FEM simulations were conducted to ensure that the mechanical deformation was within specific limits during balloon expansions. A prototype was fabricated with laser cutting techniques and its radiation performance experimentally characterized. It was demonstrated that the fabricated stent antenna had an omnidirectional radiation pattern for arbitrary receiving angles, a gain of 1.38 dBi, and a radiation efficiency of 74.5% at a resonant frequency of 2.07 GHz. The main contribution of this work was the manipulation of the current distributions of the stent for good EM radiation performances which needed to be further examined while inserted inside human bodies. These research results should contribute to the further development of implantable wireless communications and intravascular monitoring of biomedical signals such as blood pressure and blood flow velocity.

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