Výsledky vyhledávání - "N. J. Barnett"

Autor: P. D. Evans, N. J. Barnett, Richard J. Nelson, A.R. Manara, Tim Germon, P. Wall

Publikováno v: The Journal of Clinical Monitoring and Computing. 14:353-360

Objective. To examine the effect of two emitter-detector separations (2.7 and 5.5 cm) on the detection of changes in cerebral and extra-cerebral tissue oxygenation using near infrared spectroscopy (NIRS). Methods. Two NIR detectors were placed on the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::1e010f2c832248dd496d8c8ccfab40e0
https://doi.org/10.1023/a:1009957032554

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Changes in tissue oxyhaemoglobin concentration measured using multichannel near infrared spectroscopy during internal carotid angiography

Autor: P. Wall, T T Lewis, P E Evans, Tim Germon, N. J. Barnett, Richard J. Nelson

Publikováno v: Journal of Neurology, Neurosurgery & Psychiatry. 63:660-664

OBJECTIVE To develop an in vivo model for testing spatially resolved spectroscopy and quantified near infrared spectroscopy (NIRS) cerebral blood flow measurements. METHOD Multiple detector NIRS has been used to study changes in tissue oxyhaemoglobin

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a816317c3fcde169d18df2e1f4ed231c
https://doi.org/10.1136/jnnp.63.5.660

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A prototype instrument combining laser Doppler flowmetry and reflection pulse oximetry

Autor: N J Barnett, Geoffrey Dougherty, S J Pettinger

Publikováno v: Clinical Physics and Physiological Measurement. 13:105-114

A prototype instrument has been developed to combine the monitoring techniques of laser Doppler flowmetry and reflection pulse oximetry, both of which depend on laser light backscattered from the skin tissue. Simultaneous and continuous measurements

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::26376ead147a38fa22edce9cf49c37cf
https://doi.org/10.1088/0143-0815/13/2/001

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Comparative study of two laser Doppler blood flowmeters

Autor: S J Pettinger, Geoffrey Dougherty, N J Barnett

Publikováno v: Journal of Medical Engineering & Technology. 14:243-249

A new infrared laser Doppler blood flow instrument (Moor MBF3D) was evaluated using an in vitro model allowing measurements over a range of flow velocities and concentrations. The responses correlated well (r = 0.96, p less than 0.01) with those obta

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5faf9703c97b6194cb9d26d30ddf4f20
https://doi.org/10.3109/03091909009015431

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Behaviour of near-infrared light in the adult human head: implications for clinical near-infrared spectroscopy

Autor: N. J. Barnett, Tim Germon, A.R. Manara, Richard J. Nelson, Amber Young

Publikováno v: British journal of anaesthesia. 84(1)

To test theoretical assumptions supporting the use of near-infrared spectroscopy (NIRS) in clinical practice, we examined the behaviour of NIR light transmission and attenuation in the human head. Sterile probes for emitting and detecting NIR light a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f61eadacce192ce6ee02bcd7c0441ae4
https://pubmed.ncbi.nlm.nih.gov/10740545

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Sensitivity of near infrared spectroscopy to cerebral and extra-cerebral oxygenation changes is determined by emitter-detector separation

Autor: T J, Germon, P D, Evans, A R, Manara, N J, Barnett, P, Wall, R J, Nelson

Publikováno v: Journal of clinical monitoring and computing. 14(5)

To examine the effect of two emitter-detector separations (2.7 and 5.5 cm) on the detection of changes in cerebral and extra-cerebral tissue oxygenation using near infrared spectroscopy (NIRS).Two NIR detectors were placed on the scalp 2.7 and 5.5 cm

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::0563122394946693a2bb0669f60c449b
https://pubmed.ncbi.nlm.nih.gov/9951761

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Applications of NIRS for Measurements of Tissue Oxygenation and Haemodynamics During Surgery

Autor: Cj Green, P. Wall, N. J. Barnett, C. Shurey, S. Simpkin, Maureen S. Thorniley, K. S. Khaw, J. S. Sinclair

Publikováno v: Advances in Experimental Medicine and Biology ISBN: 9781461376897

Since 1977 when Jobsis described the first use of near infra-red spectroscopy (NIRS) for non-invasive monitoring of changes in cerebral oxyhaemoglobin (O2Hb), deoxyhaemoglobin (HHb) and Caa3 the field has undergone major transformations1,2.

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::c389bb9908813ee08f972c88744f8959
https://doi.org/10.1007/978-1-4615-5865-1_61

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Applications of NIRS for measurements of tissue oxygenation and haemodynamics during surgery

Autor: M S, Thorniley, S, Simpkin, N J, Barnett, P, Wall, K S, Khaw, C, Shurey, J S, Sinclair, C J, Green

Publikováno v: Advances in experimental medicine and biology. 411

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=pmid________::762cffa6521da45342e20c6dad2f2dd9
https://pubmed.ncbi.nlm.nih.gov/9269465

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A critical review of laser Doppler flowmetry

Autor: A. N. Obeid, Geoffrey Dougherty, N. J. Barnett, G. Ward

Publikováno v: Journal of medical engineeringtechnology. 14(5)

Laser Doppler flowmetry (LDF) is now a well-established, non-invasive technique for measuring microvascular blood perfusion. However, there are a number of factors which can seriously affect the interpretation of the laser Doppler signal which are of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0122dbaf0e94fd033a229313d33ef624
https://pubmed.ncbi.nlm.nih.gov/2231661

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