title: Investigation of hemodynamic changes in the ophthalmic artery using color Doppler imaging after strabismus surgery.
abstract: OBJECTIVE
  We investigated hemodynamic changes in the ophthalmic artery (OA) using color Doppler imaging (CDI) after two horizontal rectus muscles surgery.
  
  
  METHODS
  Eyes of the surgical group (n=18) underwent surgery on two horizontal rectus muscles, and the control group was the contralateral eyes. CDI of the OA was performed before operation and on postoperative days (POD) 1, 7 and 30. Peak systolic (Vmax), end diastolic (Vmin), and mean (Vmean) blood flow velocities were measured, and resistivity index (RI) and pulsatility index (PI) were calculated.
  
  
  RESULTS
  Vmax, Vmin and Vmean were significantly higher, and RI and PI were significantly lower in the surgical group than in the control group on POD 1 (p<0.05). In the surgical group, Vmax, Vmin and Vmean were significantly higher, and RI and PI were significantly lower, on POD 1 than those measured on other days (p<0.05).
  
  
  CONCLUSIONS
  We showed that surgery on the two horizontal rectus muscles increased OA blood flow during the early postoperative period.
authors.affiliation: Department of Ophthalmology, Chungnam National University College of Medicine, Daejeon, Korea.
authors.forename: Nam-Ho
authors.initials: NH
authors.lastname: Lee
authors.forename: Su-Na
authors.initials: SN
authors.lastname: Lee
mesh_terms: D000293:Adolescent; D000328:Adult; D002648:Child; D005260:Female; D006439:Hemodynamics; D006801:Humans; D008297:Male; D008875:Middle Aged; D009880:Ophthalmic Artery / Q000000981:diagnostic imaging* / Q000503:physiopathology*; D011184:Postoperative Period; D013285:Strabismus / Q000000981:diagnostic imaging / Q000503:physiopathology* / Q000601:surgery*; D018615:Ultrasonography, Doppler, Color