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Biomedical Optics Express

Biomedical Optics Express

  • Editor: Joseph A. Izatt
  • Vol. 3, Iss. 1 — Jan. 1, 2012
  • pp: 37–47

Extending vaterite microviscometry to ex vivo blood vessels by serial calibration

Samir G. Shreim, Earl Steward, and Elliot L. Botvinick  »View Author Affiliations


Biomedical Optics Express, Vol. 3, Issue 1, pp. 37-47 (2012)
http://dx.doi.org/10.1364/BOE.3.000037


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Abstract

The endothelial glycocalyx layer is a ~2 µm thick glycosaminoglycan rich pericellular matrix expressed on the luminal surface of vascular endothelial cells, which has implications in vessel mechanics and mechanotransduction. Despite its role in vascular physiology, no direct measurement has of yet been made of vessel glycocalyx material properties. Vaterite microviscometry is a laser tweezers based microrheological method, which has been previously utilized to measure the viscosity of linear and complex fluids under flow. This form of microrheology has until now relied on complete recollection of the forward scattered light. Here we present a novel method to extend vaterite microviscometry to relatively thick samples. We validate our method and its assumptions and measure the apparent viscosity as a function of distance from the vascular endothelium. We observe a differential response in conditions designed to preserve the EGL in comparison to those designed to collapse it.

© 2011 OSA

OCIS Codes
(140.7010) Lasers and laser optics : Laser trapping
(170.4520) Medical optics and biotechnology : Optical confinement and manipulation
(160.1435) Materials : Biomaterials

ToC Category:
Optical Traps, Manipulation, and Tracking

History
Original Manuscript: August 25, 2011
Revised Manuscript: November 7, 2011
Manuscript Accepted: November 8, 2011
Published: December 5, 2011

Citation
Samir G. Shreim, Earl Steward, and Elliot L. Botvinick, "Extending vaterite microviscometry to ex vivo blood vessels by serial calibration," Biomed. Opt. Express 3, 37-47 (2012)
http://www.opticsinfobase.org/boe/abstract.cfm?URI=boe-3-1-37


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