Abstract
A new photoelectric device for measuring blood vessel diameters is described. The principle of this device consists in locating the vessel within a beam of parallel light at right angles to the beam direction, and eliminating all light striking the vessel. Thus only the light passing by the side of the vessel determines the signal strength of a photocell. The elimination of the light by the vessel due to reflection, refraction, diffraction, or scattering, is achieved with the aid of a lens and pinhole representing a spatial filter. This arrangement is effective irrespective of whether the vessel is opaque or transparent. The resolving power of the device in measuring changes of outside diameter is better than 0.5 μm for vessels up to 3 mm in diameter. The upper frequency limit is 300 Hz (−3 dB). The application of the method is demonstrated by two examples of measurements obtained on a small muscular artery.
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References
Aars H, Leraand S (1968) Simultaneous recording of aortic baroreceptor activity and aortic diameter. Acta Physiol Scand 72:22–23A
Altura BT, Altura BM (1978) Factors affecting vascular responsiveness In: Kaley G, Altura BM (eds) Microcirculation, vol II, University Park Press, Baltimore, pp 548–552
Baez S (1966) Recording of microvascular dimensions with an image-splitter television microscope. J Appl Physiol 21:299–301
Bergel DH (1961) The static elastic properties of the arterial wall. J Physiol (Lond) 156:445–457
Bergel DH (1972) The measurement of lengths and dimensions. In: Bergel DH (ed) Cardiovascular fluid dynamics, vol I. Academic Press, London, New York, pp 91–114
Bertram CD (1977) Ultrasonic transit-time system for arterial diameter measurement. Med Biol Eng Comput 15:489–499
Cobbold RSC (1974) Transducers for biomedical measurements: Principles and applications. Wiley and Sons, New York
Flaud P, Geiger D, Oddou C, Quemada D (1975) Experimental study of wave propagation through viscous fluid contained in viscoelastic cylindrical tube under static stresses. Biorheology 12:347–354
Fronek K, Schmid-Schönbein G, Fung YC (1976) A noncontact method for three-dimensional analysis of vascular elasticity in vivo and in vitro. J Appl Physiol 40:634–637
Gow BS (1966) An electrical caliper for measurement of pulsatile arterial diameter changes in vivo. J Appl Physiol 21:1122–1126
Hutchison KJ (1974) Effect of variation of transmural pressure on the frequency response of isolated segments of canine carotid arteries. Cir Res 35:742–751
Johansson B, Bohr DF (1966) Rhythmic activity in smooth muscle from small subcutaneous arteries. Am J Physiol 210:801–806
Johansson B, Mellander B (1975) Static and dynamic components in the vascular myogenic response to passive changes in length as revealed by electrical and mechanical recordings from the portal vein. Cir Res 36:76–83
Johnson PC (1967) Measurement of microvascular dimensions in vivo. J Appl Physiol 23:593–596
Mallos AJ (1962) An electrical caliper for continuous measurement of relative displacement. J Appl Physiol 17:131–134
Sakaguchi M, Ohhashi T, Azuma T (1979) A photoelectric diameter gauge utilizing the image sensor. Pflügers Arch 378:263–268
Wetterer E, Busse R, Bauer RD, Schabert A, Summa Y (1977) Photoelectric device for contact-free recording of the diameters of exposed arteries in situ. Pflügers Arch 368:149–152
Wiederhielm, CA (1963) Continuous recording of arteriolar dimensions with a television microscope. J Appl Physiol 18:1041–1042
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Schabert, A., Bauer, R.D. & Busse, R. Photoelectric device for the recording of diameter changes of opaque and transparent blood vessels in vitro. Pflugers Arch. 385, 239–242 (1980). https://doi.org/10.1007/BF00647463
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DOI: https://doi.org/10.1007/BF00647463