Fogorvosi szemle, 2000 (93. évfolyam, 1-12. szám)

2000-04-01 / 4. szám

ment for continuous measurement of tissue blood flow by light beating spectroscopy. IEEE Trans. Biomed. Eng. 27, 12, 1980. - 8. Nilsson, G. E., Tenland, T., Oberg, P. A.: Evaluation of a laser Doppler flowmeter for measurement of tissue blood flow. IEEE Trans. Biomed. Eng. 27, 597, 1980. - 9. Nilsson, G. E.: Signal processor for laser Doppler tissue flowmetry. Med. Biol. Eng. Comput. 22, 343, 1984. - 10. Oberg, P. A., Tenland, T., Nilsson, G. E. : Laser Doppler flowmetry — non-invasive and continuous method for blood flow evaluation in microvascular studies, eta. Med. Scand. Suppl. 687, 17, 1984. - 11. Odor, T. M., Pitt Ford, T. R., Me Donald, F.: Effect of wavelength and bandwidth on the clinical reliability of laser Doppler recordings. Endod. Dent. Traumatol. 12, 9, 1996. - 12. Pitt Ford, T. R., Seare, M., McDonald, F.: Action of adrenaline on the effect of dental local anaesthetic solutions. Endod. Dent. Traumatol. 9, 31, 1993. - 13. Ramsay, D. S., Artun, J., Martinen, S. S.: Reliability of pulpal blood flow measurements utilizing laser Doppler flowmetry. J. Dent. Res. 70, 1427, 1991. - 14. Rowe, A. H., Pitt Ford, T. R. : The assessment of pulpal vitality. Int. Endodont. J. 23, 77, 1990. — 15. Watson, A. D., Pitt Ford, T. R., McDonald, F.: Blood flow changes in the dental pulp during limited exercise measured by laser Doppler flowmetry. Int. Endodont. J. 25, 82, 1991.

Dr. Csempész, F., dr. Vág, J., dr. Kerémi, B., dr. Györfi, A., dr. Fazekas, A.: Blood flow measurements in oral tissues using laser Doppler flowmetry

In our examination the non-invasive laser Doppler flowmetry (LDF) was used to determine the blood flow in the tooth pulp (PBF) and in the gingiva (GBF) in humans. Perfusion values were collected by the means of LDF probe adjusted manually or by manipulator assisted fixation. Significantly lower GBF rate was detected by hand-held probe as compared to that obtained by manipulator assisted fixation (pcO.OOl). No significant difference was observed for the PBF rates (p>0.9). The coefficient of variation determined for GBF was higher (0.32±0.09) in case of manual procedure than at manipulator assisted (0.13±0.02) fixation mode. In contrary, the value of variation coefficient of PBF data obtained by hand-held probe was lower as compared to that calculated from data of manipulator fixation (0.16±0.08 v.

0.22±0.1; p<0.05). These data indicate that while the manual fixation for measuring PBF seems to be satisfactory, for the accurate determination of GBF rate application of manipulator is essential.

Key words: pulpal and gingival blood flow, laser Doppler flowmetry

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