Fiber optic pH sensor based on mode-filtered light detection

Wu, Suozhu; Wenping, Cheng; Qiu, Yan; Li, Zhongping; Shuang, Shaomin; Dong, Chuan

doi:10.1016/j.snb.2009.10.058

Cited by 33 publications

(19 citation statements)

References 15 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…37,38 The lack of comparable clinical monitor further clinical studies are impossible, until a new reliable and clinically approved method of continuous in vivo pH bt monitoring in humans is available. Several groups are working on development of such tool [39][40][41] and it may be possible in future to resume clinical pH bt monitoring.…”

Section: Discussionmentioning

confidence: 99%

Extracellular Brain Ph with or without Hypoxia is a Marker of Profound Metabolic Derangement and Increased Mortality after Traumatic Brain Injury

Timofeev

Nortje

Al-Rawi

et al. 2012

J Cereb Blood Flow Metab

View full text Add to dashboard Cite

Cerebral hypoxia and acidosis can follow traumatic brain injury (TBI) and are associated with increased mortality. This study aimed to evaluate a relationship between reduced pH bt and disturbances of cerebral metabolism. Prospective data from 56 patients with TBI, receiving microdialysis and Neurotrend monitoring, were analyzed. Four tissue states were defined based on pH bt and P bt O 2 : 1-low P bt O 2 /pH bt , 2-low pH bt /normal P bt O 2 , 3-normal pH bt /low P bt O 2 , and 4-normal pH bt /P bt O 2 ). Microdialysis values were compared between the groups. The relationship between P bt O 2 and lactate/pyruvate (LP) ratio was evaluated at different pH bt levels. Proportional contribution of each state was evaluated against mortality. As compared with the state 4, the state 3 was not different, the state 2 exhibited higher levels of lactate, LP, and glucose and the state 1-higher LP and reduced glucose (Po0.001). A significant negative correlation between LP and P bt O 2 (rho ¼ À 0.159, Po0.001) was stronger at low pH bt (rho ¼ À 0.201, Po0.001) and nonsignificant at normal pH bt (P ¼ 0.993). The state 2 was a significant discriminator of mortality categories (P ¼ 0.031). Decreased pH bt is associated with impaired metabolism. Measuring pH bt with P bt O 2 is a more robust way of detecting metabolic derangements.

show abstract

Section: Discussionmentioning

confidence: 99%

Extracellular Brain Ph with or without Hypoxia is a Marker of Profound Metabolic Derangement and Increased Mortality after Traumatic Brain Injury

Timofeev

Nortje

Al-Rawi

et al. 2012

J Cereb Blood Flow Metab

View full text Add to dashboard Cite

show abstract

“…This, configuration is usually referred as cladding removed (CR) followed by the optical fiber type such as multi-mode fiber (MMF) or plastic optical fiber (POF) and have been largely exploited in literature for the development of optical fiber sensors for ammonia [86,87], humidity [88,89], toluene [90], H 2 S [91,92], aerosol [93] or pH [94][95][96][97][98][99][100][101][102][103][104] detection.…”

Section: Absorbance-based Sensorsmentioning

confidence: 99%

“…As regard as the modification of the optical fiber structure it can be mentioned the fabrication of optical fiber sensors by means of hetero-core optical fibers (HCOF) [105][106][107], tapers [22,108,109] or side-polished fibers [94] cresol red, chlorophenol red, bromophenol blue + CNTs [115] Cresol red, chlorophenol red, bromophenol blue [95,96] Ethyl violet [97] Bromophenol blue [98] Bromocresol green & cresol red [99] silica matrix [100] methyl orange sol-gel [101] polymeric film [102] CRMMF/CRPOF [110,111] while the use of special optical fibers for the fabrication of sensors is mainly referred to hollow-core fibers (HCFs) [112,108] and microstructured optical fibers (MOFs) [113,114].…”

Section: Absorbance-based Sensorsmentioning

confidence: 99%

Nanostructured Materials in Optical Fiber Sensing

Hernáez¹

2013

TOOPTSJ

View full text Add to dashboard Cite

This work comprehends a review of nanostructured materials employed in the fabrication of optical fiber sensors in the last years. The continuous advances in nanofabrication techniques have enabled to manipulate the matter precisely producing well defined nanostructurated coatings or repetitive patterns at nanoscale level. The interactions of light with these nano-organized materials or patterns at the nanoscale level enable to observe interesting phenomena, such as interferometry, fluorescence, absorbance, resonances and many others which can be exploited in the fabrication of sensing devices. A particular case consists of optical fiber sensors, where the light travelling through an optical fiber interacts with the sensitive layer. The properties of the sensitive layer, such as the organization, physical properties, chemical bounds etc. will determine the sensing characteristics of the final device. The utilization of some of the most common nanostructured materials, such as polymers, nanoparticles, metals, metal oxides or biological coatings are reviewed here.

show abstract

“…Suozhu Wu et Al. [11], successfully designed and developed a mode-filtered light fiber optic pH sensor to detect and determine the pH level in an effective way. Cresol red (pH detection level 9.0-13.0) and Bromocresol green (pH detection level 2.0-8.0) had been used as the pH indicator in this sensing technology system.…”

Section: Recent Developments Of Fos Based Applicationsmentioning

confidence: 99%

A review paper on fiber-optic sensors and application of PDMS materials for enhanced performance

Sidek

Afzal

2011

2011 IEEE Symposium on Business, Engineering and Industrial Applications (ISBEIA)

View full text Add to dashboard Cite

Fiber optic sensing technology is one of the fastest growing technologies in the modern day science. Optical fiber sensors draw more and more interests of researchers and application engineers for its exclusive and very valuable characteristics. It is mainly used to sense the physical and chemical properties such as micro-bending, strains, vibrations, accelerations, linear and rotary position, temperatures, pressures, determination of pH, refractive index of liquid solution, pipeline condition monitoring etc. furthermore, fiber optic sensors have a variety of special benefits for example faster response, low-cost fabrication, very light weight, highly sensitive plus non-reactive to electromagnetic interference. Fiber optic sensors can also be classified under various types based on sensing methods and applications. These distinctive and valuable application features facilitate an extensive range of industries such as biomedical, aerospace, structural health monitoring, transportation, oil-pipe condition etc. This paper discusses about the basic working principle of fiber optic sensing technology, various types of fiber optic sensors and their applications and future scope of fiber optic sensors. This paper also discusses about PDMS materials as the coating for fiber optic sensors for improved and enhanced performance. Keywords-Fiber Optic Sensing technology, practical applications of FOS, application of FOS in SHM, PDMS material, compatibility of PDMS and fiber optic sensorsI.

show abstract

Fiber optic pH sensor based on mode-filtered light detection

Cited by 33 publications

References 15 publications

Extracellular Brain Ph with or without Hypoxia is a Marker of Profound Metabolic Derangement and Increased Mortality after Traumatic Brain Injury

Extracellular Brain Ph with or without Hypoxia is a Marker of Profound Metabolic Derangement and Increased Mortality after Traumatic Brain Injury

Nanostructured Materials in Optical Fiber Sensing

A review paper on fiber-optic sensors and application of PDMS materials for enhanced performance

Contact Info

Product

Resources

About