Low-cost and miniature all-silica Fabry–Perot pressure sensor for intracranial pressure measurement

2014 ◽  
Vol 12 (11) ◽  
pp. 111401-111404 ◽  
Author(s):  
Yuting Li Yuting Li ◽  
Wentao Zhang Wentao Zhang ◽  
Zhaogang Wang Zhaogang Wang ◽  
Hongbin Xu Hongbin Xu ◽  
Jing Han Jing Han ◽  
...  
Keyword(s):  
Intracranial Pressure ◽  
Pressure Sensor ◽  
Pressure Measurement ◽  
Low Cost ◽  
Fabry Perot

Clinical Evaluation of Intraparenchymal Spiegelberg Pressure Sensor

Neurosurgery ◽  
2003 ◽  
Vol 52 (6) ◽  
pp. 1455-1459 ◽  
Author(s):  
Josef-Michael Lang ◽  
Jürgen Beck ◽  
Michael Zimmermann ◽  
Volker Seifert ◽  
Andreas Raabe
Keyword(s):  
Intracranial Pressure ◽  
Pressure Sensor ◽  
Pressure Measurement ◽  
Clinical Investigation ◽  
Low Cost ◽  
Absolute Difference ◽  
Intraventricular Pressure ◽  
Technical Problems ◽  
Computed Tomographic

Abstract OBJECTIVE The Spiegelberg 3-PN intraparenchymal pressure sensor was clinically evaluated. DESCRIPTION OF INSTRUMENTATION The Spiegelberg intraparenchymal pressure sensor is a low-cost device that uniquely performs regular automatic zeroing in situ throughout the measurement period. OPERATIVE TECHNIQUE The Spiegelberg sensor was inserted in 87 patients who required intracranial pressure monitoring as part of their routine management. Complications were assessed by postoperative computed tomographic scanning and clinical investigation. The automated zeroing procedure was assessed after implantation of the sensor and during long-term measurement. In five patients, the “gold standard” of intraventricular pressure was measured simultaneously and compared with the intraparenchymal or subdural Spiegelberg 3-PN pressure. EXPERIENCE AND RESULTS No complications associated with the Spiegelberg sensor were observed. The duration of monitoring ranged from 3 to 28 days (mean, 10 d). In 3 patients, technical problems occurred, and in 84 patients, the pressure measurement was successful, including the automatic zeroing procedures performed by the monitor after insertion and hourly thereafter. The absolute difference between the Spiegelberg reading and the intraventricular pressure was less than ±3 mm Hg in 99.6% and less than ±2 mm Hg in 91.3% of readings. An Altman-Bland bias plot revealed good agreement between the two methods, with an average bias of 0.5 mm Hg, but revealed a significant trend toward 10% lower Spiegelberg readings with increasing intracranial pressure of >25 mm Hg. There was no difference between intraparenchymal and subdural locations. CONCLUSION The Spiegelberg 3-PN sensor was reliable and simple to use. It can be recommended for routine intraparenchymal and subdural pressure measurement at a considerably lower price compared with other tip transducers and has the unique advantage of automated zeroing in vivo.

Low-Cost, Single-Chip Amplified Pressure Sensor in a Moulded Package for Tire Pressure Measurement and Motor Management

2004 ◽  
pp. 39-50 ◽  
Author(s):  
Ralf Bornefeld ◽  
Wolfgang Schreiber-Prillwitz ◽  
Olaf Stöver ◽  
Henry V. Allen ◽  
Michael L. Dunbar ◽  
...  
Keyword(s):  
Pressure Sensor ◽  
Pressure Measurement ◽  
Low Cost ◽  
Single Chip ◽  
Tire Pressure

scholarly journals An Optimized PDMS Thin Film Immersed Fabry-Perot Fiber Optic Pressure Sensor for Sensitivity Enhancement

Coatings ◽  
2019 ◽  
Vol 9 (5) ◽  
pp. 290 ◽  
Author(s):  
Cheng Luo ◽  
Xiangnan Liu ◽  
Jinrong Liu ◽  
Jian Shen ◽  
Hui Li ◽  
...  
Keyword(s):  
Film Thickness ◽  
Pressure Sensor ◽  
Fiber Optic ◽  
Diffusion Rate ◽  
Low Cost ◽  
Viscosity Coefficient ◽  
External Pressure ◽  
Joint Surface ◽  
Pdms Film ◽  
Fabry Perot

To effectively control the critical thickness of a polydimethylsiloxane (PDMS) film and enhance the sensitivity characteristics of the fiber pressure sensor, we propose a new method to optimize the thickness of the PDMS film in a fiber tube. It is characterized by analyzing the relationship between the diffusion rate of the PDMS and its viscosity, and using an oven to solidify the PDMS to a certain extent to accurately control the diffusion rate and diffusion length of the PDMS in the fiber tube. We also used multiple transfer methods to control the volume of the PDMS in the fiber tube to minimize the thickness of the formed PDMS film. Fabry-Perot interference occurs when the surface of the PDMS film layer filled into the fiber tube and the adjacent single mode fiber/fiber tube form a joint surface. This method forms a new fiber-optic Fabry-Perot pressure sensor that is very sensitive to external pressure parameters. The experimental results show that the optimized film thickness will be reduced to an order of 20 μm. Correspondingly, the fiber-optic pressure sensor has a sensitivity of up to 100 pm/kPa, which is about 100 times that reported in the literature. The structure also has better resistance to temperature interference. To our knowledge, this is the first in-depth study of the effects of the PDMS viscosity coefficient, diffusion rate, and fiber pressure sensitivity in fiber. The film thickness optimization method has some advantages, including a low cost, good controllability, and good application value in high sensitivity pressure and sound wave detection.

Micro packaged MEMS pressure sensor for intracranial pressure measurement

2015 ◽  
Vol 36 (6) ◽  
pp. 064009 ◽  
Author(s):  
Xiong Liu ◽  
Yan Yao ◽  
Jiahao Ma ◽  
Yanhang Zhang ◽  
Qian Wang ◽  
...  
Keyword(s):  
Intracranial Pressure ◽  
Pressure Sensor ◽  
Pressure Measurement
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