advertisement
Abstract #6076 Published in IGR 2-2
Blood flow parameters in ocular vessels of patients with glaucoma
Ustymowicz A; Krejza J; Tarasow E; Mariak Z; Zalewska R; Proniewska-Skretek E; Stankiewicz AKlinika Oczna 1999; 101: 445-449
PURPOSE: To determine Doppler flow parameters in the ocular vessels of glaucomatous patients. MATERIAL AND METHODS: Thirty-eight glaucomatous patients, aged 64 ± 16 years, and 57 healthy volunteers were examined with a 7.5 mHz linear-array probe. Consistently identified arterial structures included ophthalmic artery, central retinal artery and short posterior ciliary arteries. The peak systolic, end diastolic and mean velocities were measured from Doppler spectra. Resistance and pulsatility indices were also determined. RESULTS: End-diastolic and mean velocities in central retinal artery of glaucomatous eyes were: 1.5 ± 1.9 cm/sec, 4.0 ± 2.0 cm/sec, whereas in healthy eyes these were significantly higher: 3.5 ± 1.0 cm/sec, 5.4 ± 1.5 cm/sec, respectively. These velocities in short posterior ciliary arteries in glaucomatous patients were significantly lower: 2.4 ± 2.3 cm/sec, 5.6 ± 2.2 cm/sec, comparing to healthy subjects: 4.8 ± 1.7 cm/sec, 7.3 ± 2.2 cm/sec. Resistance and pulsatility indices in central retinal artery and short posterior ciliary arteries were significantly higher in the group of PATIENTS: RI = 0.85 ± 0.18, PI = 2.11 ± 0.92 in the central retinal artery and RI = 0.81 ± 0.18, PI = 1.96 ± 0.91 in the short posterior ciliary arteries, compared to healthy subjects: RI = 0.61 ± 0.08, PI = 1.20 ± 0.17 in the central retinal artery, RI = 0.61 ± 0.09, PI = 1.13 ± 0.18 in the short posterior ciliary arteries. Impedance indices increased progressively with intraocular pressure elevation. There were no significant differences in Doppler blood flow parameters in ophthalmic arteries between patients and the control group. CONCLUSIONS: Blood flow velocities in the central retinal and short posterior ciliary arteries are lower, and resistance and pulsatility indices are higher, in glaucomatous eyes compared to healthy subjects, whereas in ophthalmic artery Doppler parameters are similar in both groups.LA: Polish
Dr. A. Ustymowicz, Zakladu Radiologii AM w Bialymstoku, Poland
Classification:
6.11 Bloodflow measurements (Part of: 6 Clinical examination methods)
