Document Detail

A miniaturized pressure sensor with inherent biofouling protection designed for in vivo applications.
MedLine Citation:
PMID:  22254697     Owner:  NLM     Status:  MEDLINE    
The design, fabrication, and measurement results for a diaphragm-based single crystal silicon sensor element of size 820 μm × 820 μm × 500 μm are presented. The sensor element is designed for in vivo applications with respect to size and measurement range. Moreover, it is optimized for longtime operation in the human body through a built-in protection preventing biofouling on the piezoresistors. The sensitivity is about 20 mV/V for a change from 500 to 1500 mbar absolute pressure. This result is comparable to conventional sized micromachined pressure sensors. The output signal is not found to be influenced by exposure to 60 °C for three hours, a normal temperature load for a typical sterilization process for medical devices (Ethylene Oxide Sterilization). The hysteresis is low; < 0.25% of full scale output signal. The sensor element withstands an overload pressure of 3000 mbar absolute pressure. Observed decrease in the output signal with temperatures and observed nonlinearity can easily be handled by traditional electronic compensation techniques.
I Clausen; S T Moe; L G W Tvedt; A Vogl; D T Wang
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Conference proceedings : ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Annual Conference     Volume:  2011     ISSN:  1557-170X     ISO Abbreviation:  Conf Proc IEEE Eng Med Biol Soc     Publication Date:  2011  
Date Detail:
Created Date:  2012-01-18     Completed Date:  2012-06-12     Revised Date:  2014-08-21    
Medline Journal Info:
Nlm Unique ID:  101243413     Medline TA:  Conf Proc IEEE Eng Med Biol Soc     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1880-3     Citation Subset:  IM    
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MeSH Terms
Biofouling / prevention & control*
Biosensing Techniques / instrumentation*
Equipment Design
Equipment Failure Analysis
Micro-Electrical-Mechanical Systems / instrumentation*
Prostheses and Implants / microbiology*
Reproducibility of Results
Sensitivity and Specificity
Transducers, Pressure / microbiology*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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