Multisensor Catheter For Invasive Measuremt Of Blood Parameters

Manoli, Yiannos; Eichholz, J.; Kandler, M.; Kordas, Norbert; Langerbein, A.; Mokwa, W.; Fahnle, M.; Liebscher, F.F.

doi:10.1109/iembs.1991.684657

Cited by 4 publications

(1 citation statement)

References 3 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It has a 120 µm membrane with 1 µm gap, on board amplification and pulse width modulated output at a power consumption of 5 mW. This pressure sensor has already been described for an invasive measurement of blood pressure in 1990 [66] and for use on a catheter in 1991 [67]. In that same year another catheter-tip capacitive pressure sensor was presented [68].…”

Section: Intra-cranial Pressure Sensorsmentioning

confidence: 99%

Microsystem technologies for implantable applications

Receveur

Lindemans

Rooij

2007

J. Micromech. Microeng.

112

View full text Add to dashboard Cite

Microsystem technologies (MST) have become the basis of a large industry. The advantages of MST compared to other technologies provide opportunities for application in implantable biomedical devices. This paper presents a general and broad literature review of MST for implantable applications focused on the technical domain. A classification scheme is introduced to order the examples, basic technological building blocks relevant for implantable applications are described and finally a case study on the role of microsystems for one clinical condition is presented. We observe that the microfabricated parts span a wide range for implantable applications in various clinical areas. There are 94 active and 67 commercial 'end items' out of a total of 142. End item refers to the total concept, of which the microsystem may only be a part. From the 105 active end items 18 (13% of total number of end items) are classified as products. From these 18 products, there are only two for chronic use. The number of active end items in clinical, animal and proto phase for chronic use is 17, 13 and 20, respectively. The average year of first publication of chronic end items that are still in the animal or clinical phase is 1994 (n = 7) and 1993 (n = 11), respectively. The major technology-market combinations are sensors for cardiovascular, drug delivery for drug delivery and electrodes for neurology and ophthalmology. Together these form 51% of all end items. Pressure sensors form the majority of sensors and there is just one product (considered to be an implantable microsystem) in the neurological area. Micro-machined ceramic packages, glass sealed packages and polymer encapsulations are used. Glass to metal seals are used for feedthroughs. Interconnection techniques such as flip chip, wirebonding or conductive epoxy as used in the semiconductor packaging and assembly industry are also used for manufacturing of implantable devices. Coatings are polymers or metal. As an alternative to implantable primary batteries, rechargeable batteries were introduced or concepts in which energy is provided from the outside based on inductive coupling. Long-term developments aiming at autonomous power are, for example, based on electrostatic conversion of mechanical vibrations. Communication with the implantable device is usually done using an inductive link. A large range of materials commonly used in microfabrication are also used for implantable microsystems.

show abstract

Section: Intra-cranial Pressure Sensorsmentioning

confidence: 99%