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Non-invasive contin...
Non-invasive continuous estimation of blood flow changes in human patellar bone
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- Naslund, J. (författare)
- Näslund, J., Department of Physiology and Pharmacology, Karolinska Institutet, 171 77 Stockholm, Sweden
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- Pettersson, Jonas (författare)
- Linköpings universitet,Tekniska högskolan,Institutionen för medicinsk teknik
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- Lundeberg, T. (författare)
- Rehabilitation Medicine University Clinic Stockholm, Danderyds Hospital, Stockholm, Sweden
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- Linnarsson, D. (författare)
- Karolinska Institutet
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- Lindberg, Lars-Göran (författare)
- Linköpings universitet,Tekniska högskolan,Fysiologisk mätteknik
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Näslund, J, Department of Physiology and Pharmacology, Karolinska Institutet, 171 77 Stockholm, Sweden Tekniska högskolan (creator_code:org_t)
- 2006-06-03
- 2006
- Engelska.
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Ingår i: Medical and Biological Engineering and Computing. - : Springer Science and Business Media LLC. - 0140-0118 .- 1741-0444. ; 44:6, s. 501-509
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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http://kipublication...
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Abstract
Ämnesord
Stäng
- A photoplethysmographic (PPG) technique to assess blood flow in bone tissue has been developed and tested. The signal detected by the PPG consists of a constant-level (DC) component - which is related to the relative vascularization of the tissue - and a pulsatile (AC) component - which is synchronous with the pumping action of the heart. The PPG probe was applied on the skin over the patella. The probe uses near-infrared (804 nm) and green (560 nm) light sources and the AC component of the PPG signals of the two wavelengths was used to monitor pulsatile blood flow in the patellar bone and the overlying skin, respectively. Twenty healthy subjects were studied and arterial occlusion resulted in elimination of PPG signals at both wavelengths, whereas occlusion of skin blood flow by local surface pressure eliminated only the PPG signal at 560 nm. In a parallel study on a physical model with a rigid tube we showed that the AC component of the PPG signal originates from pulsations of blood flow in a rigid structure and not necessarily from volume pulsations. We conclude that pulsatile blood flow in the patellar bone can be assessed with the present PPG technique. © International Federation for Medical and Biological Engineering 2006.
Nyckelord
- Bone
- Near-infrared light
- Perfusion
- Photoplethysmography
- Pulsatile
- TECHNOLOGY
- TEKNIKVETENSKAP
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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