title: [Blood flow parameters in ocular vessels of patients with glaucoma].
abstract: OBJECTIVE
  To determine Doppler flow parameters in ocular vessels of glaucomatous patients.
  
  
  METHODS
  38 glaucomatous patients, aged 64 +/- 16, and 57 healthy volunteers were examined with 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/s, 4.0 +/- 2.0 cm/s, whereas in healthy eyes they were significantly higher: 3.5 +/- 1.0 cm/s, 5.4 +/- 1.5 cm/s, respectively. These velocities in short posterior ciliary arteries in glaucomatous patients were significantly lower: 2.4 +/- 2.3 cm/s, 5.6 +/- 2.2 cm/s, comparing to healthy subjects: 4.8 +/- 1.7 cm/s, 7.3 +/- 2.2 cm/s. 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 central retinal artery and RI = 0.81 +/- 0.18, PI = 1.96 +/- 0.91--in short posterior ciliary arteries, comparing to healthy subjects: RI = 0.61 +/- 0.08, PI = 1.20 +/- 0.17--in central retinal artery, RI = 0.61 +/- 0.09, PI = 1.13 +/- 0.18--in short posterior ciliary arteries. Impedance indices were increasing progressively with intraocular pressure elevation. There were no significant differences of Doppler blood flow parameters in ophthalmic artery between patients and control group.
  
  
  CONCLUSIONS
  Blood flow velocities in central retinal and short posterior ciliary arteries are lower, and resistance and pulsatility indices are higher in glaucomatous eyes in comparison to healthy subjects, whereas in ophthalmic artery doppler parameters are similar in both groups.
authors.affiliation: Zakladu Radiologii AM w Białymstoku.
authors.forename: A
authors.initials: A
authors.lastname: Ustymowicz
authors.forename: J
authors.initials: J
authors.lastname: Krejza
authors.forename: E
authors.initials: E
authors.lastname: Tarasów
authors.forename: Z
authors.initials: Z
authors.lastname: Mariak
authors.forename: R
authors.initials: R
authors.lastname: Zalewska
authors.forename: E
authors.initials: E
authors.lastname: Proniewska-Skretek
authors.forename: A
authors.initials: A
authors.lastname: Stankiewicz
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001783:Blood Flow Velocity / Q000502:physiology; D005123:Eye / Q000098:blood supply*; D005260:Female; D005902:Glaucoma, Open-Angle / Q000000981:diagnostic imaging*; D006801:Humans; D008297:Male; D008875:Middle Aged; D009880:Ophthalmic Artery / Q000000981:diagnostic imaging*; D012161:Retinal Artery / Q000000981:diagnostic imaging*; D018608:Ultrasonography, Doppler / Q000379:methods