title: Color Doppler imaging of ocular hemodynamic changes in Behçet disease and uveitis patients with different etiologies.
abstract: OBJECTIVE
  To investigate blood flow velocity changes and resistivity index values of orbital vessels in Behçet disease with or without ocular involvement, in uveitis patients with different etiologies, and in healthy volunteers.
  
  
  METHODS
  Subjects were divided into four groups: those with ocular involvement in Behçet disease (group I), those without ocular involvement in Behçet disease (group II), uveitis patients with different etiologies (group III), and a control group (group IV). Twenty-seven eyes in group I, 14 eyes in group II, 25 eyes in group III, and 27 eyes in group IV were investigated. The blood flow in the central retinal artery (CRA), ophthalmic artery (OA), nasal posterior ciliary artery (NPCA), and the temporal posterior ciliary artery (TPCA) was measured using color Doppler ultrasonography (CDU) to determine the peak systolic velocity (PSV), end diastolic velocity (EDV), and resistivity index (RI).
  
  
  RESULTS
  The PSV and EDV value of CRA in groups I, II, and III were found to be significantly lower than those in the control group (p < 0.05 for each). The PSV and EDV values of TPCA and NPCA in groups I, II, and III were significantly lower than those in the control group (p < 0.05 for each). Resistivity indexes of all arteries were higher in groups I, II, and III than the control group. The PSV and EDV in CRA, TPCA, and NPCA in Behçet disease patients with ocular involvement were significantly lower than all other groups (p < 0.05).
  
  
  CONCLUSIONS
  There are significant reductions in the blood flow values of the orbital arteries in patients with Behçet disease and uveitis patients with different etiologies when compared with healthy volunteers. The decrease in blood flow values in Behçet disease is more evident in patients with ocular involvement than the patients without ocular involvement. This might be the result of occlusive vasculitis, which is frequently seen in the retinal vessels of patients with Behçet disease.
authors.affiliation: Department of Ophthalmology, Erciyes University, Kayseri, Turkey. aoner@erciyes.edu.tr
authors.forename: Ayse
authors.initials: A
authors.lastname: Oner
authors.forename: Ali
authors.initials: A
authors.lastname: Akal
authors.forename: Nuri
authors.initials: N
authors.lastname: Erdogan
authors.forename: Hakki
authors.initials: H
authors.lastname: Dogan
authors.forename: Mithat
authors.initials: M
authors.lastname: Oner
mesh_terms: D000293:Adolescent; D000328:Adult; D001528:Behcet Syndrome / Q000000981:diagnostic imaging / Q000503:physiopathology*; D001783:Blood Flow Velocity; D001794:Blood Pressure; D019842:Ciliary Arteries / Q000000981:diagnostic imaging / Q000502:physiology*; D006439:Hemodynamics; D006801:Humans; D007429:Intraocular Pressure; D008875:Middle Aged; D009880:Ophthalmic Artery / Q000000981:diagnostic imaging / Q000502:physiology*; D011446:Prospective Studies; D012039:Regional Blood Flow; D012161:Retinal Artery / Q000000981:diagnostic imaging / Q000502:physiology*; D018615:Ultrasonography, Doppler, Color; D014605:Uveitis / Q000000981:diagnostic imaging / Q000503:physiopathology*