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Doppler flow measur...
Doppler flow measurement using surface integration of velocity vectors (Sivv) : in vitro validation
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- Chew, Michelle (författare)
- Departments of Anaesthesia and Intensive Care, Aarhus, Denmark
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- Brandberg, Joakim, 1967- (författare)
- Linköpings universitet,Institutionen för medicinsk teknik,Tekniska högskolan
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- Canard, Peter (författare)
- Institute of Experimental Clinical Research, Skejby Sygehus, Aarhus University Hospital, Aarhus, Denmark
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- Sloth, Erik (författare)
- Departments of Anaesthesia and Intensive Care, Aarhus, Denmark
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- Ask, Per, 1950- (författare)
- Linköpings universitet,Institutionen för medicinsk teknik,Tekniska högskolan,Fysiologisk mätteknik
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- Hasenkam, Michael (författare)
- Department of Cardiothoracic and Vascular Surgery, Aarhus, Denmark
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(creator_code:org_t)
- 2000
- 2000
- Engelska.
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Ingår i: Ultrasound in Medicine and Biology. - 0301-5629 .- 1879-291X. ; 26:2, s. 255-262
- Relaterad länk:
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https://urn.kb.se/re...
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
Ämnesord
Stäng
- Blood flow measurement using an improved surface integration of velocity vectors (SIVV) technique was tested in in vitro phantoms. SIVV was compared with true flow (12–116 mL/s) in a steady-state model using two angles of insonation (45° and 60°) and two vessel sizes (internal diameter = 11 and 19 mm). Repeatability of the method was tested at various flow rates for each angle of insonation and vessel. In a univentricular pulsatile model, SIVV flow measured at the mitral inlet was compared to true flow (29–61 mL/s). Correlation was excellent for the 19-mm vessel (r2= 0.99). There was a systematic bias but close limits of agreement (mean ± 2 SD = −24.1% ± 7.6% at 45 °; +16.4% ± 11.0% at 60 °). Using the 11-mm vessel, a quadratic relationship was demonstrated between between SIVV and true flow (r2 = 0.98–0.99), regardless of the angle of insonation. In the pulsatile system, good agreement and correlation were shown (r2 = 0.94, mean ± 2 SD = −4.7 ± 10.1%). The coefficients of variation for repeated SIVV measurements ranged from 0.9% to 10.3%. This method demonstrates precision and repeatability, and is potentially useful for clinical measurements.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Maskinteknik -- Strömningsmekanik och akustik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Mechanical Engineering -- Fluid Mechanics and Acoustics (hsv//eng)
Nyckelord
- MEDICINE
- MEDICIN
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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