title: Ultrasound biomicroscopic findings of conventional and sutureless sclerotomy sites after 20-, 23-, and 25-G pars plana vitrectomy.
abstract: OBJECTIVE
  We examined sclerotomies that were performed using 20-G systems and non-stitch 23-G systems, one-step (23/1) and two-step procedures (23/2), as well as one-step 25-G systems for pars plana vitrectomy (PPV) with ultrasound biomicroscopy (UBM) to assess subconjunctival bleb formation, vitreous incarceration, and wound closure.
  
  
  METHODS
  This study is a prospective, non-randomized, monocentre study comprising 40 patients; we examined sclerotomies using UBM after 20-G, 23/1-G, 23/2-G, and 25-G PPV in 10 patients each on days 1 and 30 postoperatively.
  
  
  RESULTS
  Subconjunctival bleb formation was not detected in any of the eyes on the first day after surgery in the 20-G and 23/2-G groups and was observed in 5 (50%, 25 G) and 2 eyes (20%, 23/1 G). By day 30 postoperatively, all blebs had spontaneously resolved. The sclerotomy tunnel could be detected by UBM at day 1 postoperatively in 10 (100%, 20 G), 9 (90%, 25 G), 7 (70%, 23/1 G), and 7 eyes (70%, 23/2 G). Thirty days postoperatively, it was present in 10 (100%, 20 G), 1 (10%, 25 G), 3 (30%, 23/1 G), and 1 (10%, 23/2 G) eye. Vitreous incarceration occurred in 2 (20%, 20 G), 7 (70%, 25 G), 4 (40%, 23/1 G), and 2 (20%, 23/2 G) eyes.
  
  
  CONCLUSIONS
  Anatomical closure of sclerotomies without subconjunctival bleb formation as seen on UBM was achieved at day 1 after 23/2-G and 20-G PPV and after 30 days postoperatively in all other non-stitch PPV techniques. Vitreous incarceration is common after 25-G PPV. Non-stitch sclerotomies can frequently no longer be detected by UBM 30 days postoperatively.
authors.affiliation: Department of Ophthalmology, St Franziskus Hospital, Muenster, Germany. matthiasgutfleisch@hotmail.com
authors.forename: M
authors.initials: M
authors.lastname: Gutfleisch
authors.forename: M
authors.initials: M
authors.lastname: Dietzel
authors.forename: B
authors.initials: B
authors.lastname: Heimes
authors.forename: G
authors.initials: G
authors.lastname: Spital
authors.forename: D
authors.initials: D
authors.lastname: Pauleikhoff
authors.forename: A
authors.initials: A
authors.lastname: Lommatzsch
mesh_terms: D001768:Blister / Q000473:pathology; D006801:Humans; D033401:Microscopy, Acoustic; D011446:Prospective Studies; D012164:Retinal Diseases / Q000601:surgery*; D012590:Sclera / Q000000981:diagnostic imaging*; D012599:Sclerostomy / Q000379:methods*; D013536:Suture Techniques; D014821:Vitrectomy / Q000379:methods*; D014945:Wound Healing