Measurement of Blood Flow Velocity of Ophthalmic and Central Retinal Artery using Color Doppler Imaging

Hong, Jong Wook; Kim, Yong Yeon; Lee, Tae Soo

Abstract

Color doppler imaging is a recent advance in ultrasonography that allows simultaneous two dimensional imaging of structures and calculation of blood flow. Doppler has been used to demonstrate blood flow in intraocular tumors, orbital varix, carotid carvenous sinus fistula, hemangioma, retinal detachment, glaucoma surgery, etc. Many reports revealed the differences of color doppler results based on race or type of color doppler ultrasounds used. The author examined 100 normal eyes with color doppler(HP SONOS 1000, HEWLETT PACKARD, U.S.A) to evaluate normal blood flow velocity of ophthalmic and central retinal artery: The parameters were the following: maximal systolic velocity(Vmax), minimal diastolic velocity(Vmin), resistance index(R.I.), and Gosling's pulsatility index(G.P.I.). The results were as following: the averages of Vmax, Vmin, R.I., G.P.I. were 42.72 +/- 6.72cm/sec, 11.55 +/- 2.60cm/sec, 0.73 +/- 0.07 and 1.48+/-0.29 in ophthalmic artery and Vmax and Vmin were 10.87 +/- 2.32cm/sec, 5.13 +/- 1.84cm/sec in central retinal artery. There was no significant statistical difference with age, sex, and bilaterality. But R.I. was increased significantly with age(p=0.005). In conclusion, these results suggested that R.I. could be a main hemodynamic index of aging changes.