A novel, microscope based, non-invasive laser Doppler flowmeter for choroidal blood flow assessment

C. Strohmaier, R. M. Werkmeister, B. Bogner, C. Runge, F. Schroedl, H. Brandtner, W. Radner, L. Schmetterer, J. W. Kiel, G. Grabner, H. A. Reitsamer

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Original languageEnglish
Pages (from-to)545-551
Number of pages7
JournalExperimental Eye Research
Volume92
Issue number6
DOIs
StatePublished - Jun 2011

Fingerprint

Flowmeters
Lasers
Rabbits
Choroid
Eye Diseases
Intraocular Pressure
Glaucoma
Perfusion
Pressure

ASJC Scopus subject areas

  • Ophthalmology
  • Sensory Systems
  • Cellular and Molecular Neuroscience

Cite this

Strohmaier, C., Werkmeister, R. M., Bogner, B., Runge, C., Schroedl, F., Brandtner, H., ... Reitsamer, H. A. (2011). A novel, microscope based, non-invasive laser Doppler flowmeter for choroidal blood flow assessment. Experimental Eye Research, 92(6), 545-551. https://doi.org/10.1016/j.exer.2011.03.014

A novel, microscope based, non-invasive laser Doppler flowmeter for choroidal blood flow assessment. / Strohmaier, C.; Werkmeister, R. M.; Bogner, B.; Runge, C.; Schroedl, F.; Brandtner, H.; Radner, W.; Schmetterer, L.; Kiel, J. W.; Grabner, G.; Reitsamer, H. A.

In: Experimental Eye Research, Vol. 92, No. 6, 06.2011, p. 545-551.

Research output: Contribution to journalArticle

Strohmaier, C, Werkmeister, RM, Bogner, B, Runge, C, Schroedl, F, Brandtner, H, Radner, W, Schmetterer, L, Kiel, JW, Grabner, G & Reitsamer, HA 2011, 'A novel, microscope based, non-invasive laser Doppler flowmeter for choroidal blood flow assessment', Experimental Eye Research, vol. 92, no. 6, pp. 545-551. https://doi.org/10.1016/j.exer.2011.03.014
Strohmaier, C. ; Werkmeister, R. M. ; Bogner, B. ; Runge, C. ; Schroedl, F. ; Brandtner, H. ; Radner, W. ; Schmetterer, L. ; Kiel, J. W. ; Grabner, G. ; Reitsamer, H. A. / A novel, microscope based, non-invasive laser Doppler flowmeter for choroidal blood flow assessment. In: Experimental Eye Research. 2011 ; Vol. 92, No. 6. pp. 545-551.
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abstract = "Impaired ocular blood flow is involved in the pathogenesis of numerous ocular diseases like glaucoma or AMD. The purpose of the present study was to introduce and validate a novel, microscope based, non-invasive Laser Doppler Flowmeter (NI-LDF) for measurement of blood flow in the choroid. The custom made NI-LDF was compared with a commercial fiber optic based laser Doppler flowmeter (Perimed PF4000). Linearity and stability of the NI-LDF were assessed in a silastic tubing model (i.d. 0.3 mm) at different flow rates (range 0.4-3 ml/h). In a rabbit model continuous choroidal blood flow measurements were performed with both instruments simultaneously. During blood flow measurements ocular perfusion pressure was changed by manipulations of intraocular pressure via intravitreal saline infusions. The NI-LDF measurement correlated linearly to intraluminal flow rates in the perfused tubing model (r = 0.99, p < 0.05) and remained stable during a 1 h measurement at a constant flow rate. Rabbit choroidal blood flow measured by the PF4000 and the NI-LDF linearly correlated with each other over the entire measurement range (r = 0.99, y = x*1.01-12.35 P.U., p < 0.001). In conclusion, the NI-LDF provides valid, semi quantitative measurements of capillary blood flow in comparison to an established LDF instrument and is suitable for measurements at the posterior pole of the eye.",
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AU - Bogner, B.

AU - Runge, C.

AU - Schroedl, F.

AU - Brandtner, H.

AU - Radner, W.

AU - Schmetterer, L.

AU - Kiel, J. W.

AU - Grabner, G.

AU - Reitsamer, H. A.

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N2 - Impaired ocular blood flow is involved in the pathogenesis of numerous ocular diseases like glaucoma or AMD. The purpose of the present study was to introduce and validate a novel, microscope based, non-invasive Laser Doppler Flowmeter (NI-LDF) for measurement of blood flow in the choroid. The custom made NI-LDF was compared with a commercial fiber optic based laser Doppler flowmeter (Perimed PF4000). Linearity and stability of the NI-LDF were assessed in a silastic tubing model (i.d. 0.3 mm) at different flow rates (range 0.4-3 ml/h). In a rabbit model continuous choroidal blood flow measurements were performed with both instruments simultaneously. During blood flow measurements ocular perfusion pressure was changed by manipulations of intraocular pressure via intravitreal saline infusions. The NI-LDF measurement correlated linearly to intraluminal flow rates in the perfused tubing model (r = 0.99, p < 0.05) and remained stable during a 1 h measurement at a constant flow rate. Rabbit choroidal blood flow measured by the PF4000 and the NI-LDF linearly correlated with each other over the entire measurement range (r = 0.99, y = x*1.01-12.35 P.U., p < 0.001). In conclusion, the NI-LDF provides valid, semi quantitative measurements of capillary blood flow in comparison to an established LDF instrument and is suitable for measurements at the posterior pole of the eye.

AB - Impaired ocular blood flow is involved in the pathogenesis of numerous ocular diseases like glaucoma or AMD. The purpose of the present study was to introduce and validate a novel, microscope based, non-invasive Laser Doppler Flowmeter (NI-LDF) for measurement of blood flow in the choroid. The custom made NI-LDF was compared with a commercial fiber optic based laser Doppler flowmeter (Perimed PF4000). Linearity and stability of the NI-LDF were assessed in a silastic tubing model (i.d. 0.3 mm) at different flow rates (range 0.4-3 ml/h). In a rabbit model continuous choroidal blood flow measurements were performed with both instruments simultaneously. During blood flow measurements ocular perfusion pressure was changed by manipulations of intraocular pressure via intravitreal saline infusions. The NI-LDF measurement correlated linearly to intraluminal flow rates in the perfused tubing model (r = 0.99, p < 0.05) and remained stable during a 1 h measurement at a constant flow rate. Rabbit choroidal blood flow measured by the PF4000 and the NI-LDF linearly correlated with each other over the entire measurement range (r = 0.99, y = x*1.01-12.35 P.U., p < 0.001). In conclusion, the NI-LDF provides valid, semi quantitative measurements of capillary blood flow in comparison to an established LDF instrument and is suitable for measurements at the posterior pole of the eye.

KW - Blood flow

KW - Choroid

KW - Eye

KW - Laser Doppler flowmetry

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