| Preliminary evaluation of a new fibre-optic cerebral oximetry system. | |
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MedLine Citation:
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PMID: 18974439 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A new system for measuring the oxygen saturation of blood within tissue has been developed, for a variety of patient monitoring applications. A particular unmet need is in the central nervous system, and this project aims to devise a means for measuring blood oxygen saturation in the brain tissue of patients recovering from neurosurgery or head injury. Coupling light sources and a photodetector to optical fibres results in a probe small enough to pass through a cranial bolt of the type already in use for intra-cranial pressure monitoring. The development and evaluation of a two-wavelength fibre-optic reflectance photoplethysmography (PPG) system are described. It was found that good quality red and near-infrared PPG signals could be obtained from the finger using a fibre-optic probe. Experiments were conducted to find the inter-fibre spacings that yield signals most suitable for calculating oxygen saturation. Reliable signals could be obtained for inter-fibre spacings between 2 mm and 5 mm, the latter being the size of the maximum aperture in the cranial bolt. A preliminary measurement from human brain tissue is also presented. |
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Authors:
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J P Phillips; R M Langford; P A Kyriacou; D P Jones |
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Publication Detail:
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Type: Evaluation Studies; Journal Article Date: 2008-10-30 |
Journal Detail:
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Title: Physiological measurement Volume: 29 ISSN: 0967-3334 ISO Abbreviation: Physiol Meas Publication Date: 2008 Dec |
Date Detail:
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Created Date: 2008-11-28 Completed Date: 2009-02-06 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9306921 Medline TA: Physiol Meas Country: England |
Other Details:
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Languages: eng Pagination: 1383-96 Citation Subset: IM |
Affiliation:
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Anaesthetic Laboratory, St Bartholomew's Hospital, London EC1A 7BE, UK. j.p.phillips@qmul.ac.uk |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Amplifiers, Electronic Brain Chemistry / physiology* Humans Infrared Rays Light Oximetry / instrumentation*, methods Photoplethysmography / instrumentation*, methods Safety Signal Processing, Computer-Assisted Software |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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