Programm & Abstracts                 "Innovationen in der Augenheilkunde"

Aktuelle Tagungsinformationen
   News and Updates

Anmeldung zur Tagung
   Registration
Hotelbuchung
   Hotel Registration
Grußwort
   Welcome address
Beteiligte Gesellschaften
   Societies involved
Eröffnung des Kongresses
   Opening Ceremony
Preise
   Awards
Wissenschaftliches Programm
   Scientific program
Posterpräsentationen
   Poster Presentation
Kurse
   Courses
Begleitende Veranstaltungen
   Collateral Events
Rahmenprogramm
   Social program
Jubiläumsparty
   Jubilee Party
DOG Information
   DOG Information
Allgemeine Informationen
   General Information
Autorenindex
   Index of Authors
Ausstellerliste
   Exhibitors
Sponsoren
   Sponsors
Teilnahmegebühren
   Registration fees
Impressum



DOG Homepage

Precision of a Manually Guided Microkeratome with Various Corneal Cut Depth

1Lackerbauer C., 1Ullrich S., 1Priglinger S., 1Bechmann M., 2Ludwig K.,
1Ludwig-Maximilians-Universität München, Klinikum Innenstadt, Augenklinik (München)
2Augenklinik der Ludwig-Maximilians-Universität München (München)

Purpose: The microkeratome is an important component of laser in situ keratomileusis (LASIK) and lamellar keratoplasty (KP). In particular accuracy and reproducibility of the intended corneal flap thickness is most significant. To compare intended to real corneal flap thickness by using a microkeratome with various cut depth is the purpose of this study.
Method: Using a manually guided microkeratome (model: LSK-one, Moria, France) a lamellar keratectomy was performed with different cut depth (150µm, 200µm, 250µm, 300µm, 350µm) in 100 pig eyes. Using optical coherence tomography (OCT; Zeiss/Humphrey, San Leandro.Ca, USA) corneal thickness was calculated by three well trained and independent reader close to and after lamellar keratectomy. Results of the reader were correlated (spearman rank correlation; rho, p<0,05). Real and intended corneal flap thickness was considered statistically (paired t-test; p<0,05).
Results: The OCT results of all reader show a high correspondence (150µm (rho: 0,89; p=0,0002), 200µm (rho: 0,87; p=0,0005), 250µm (rho: 0,93; p=0,0002) 300µm (rho: 0,94; p=0,0001) and 350µm (rho: 0,87; p=0,0006). With an intended 150µm cut depth mean corneal flap thickness is 144µm±34 (p=0,47); with an intended 200µm cut depth mean corneal flap thickness is 221µm±38 (p=0,14); with an intended 250µm cut depth mean corneal flap thickness is 262µm±30 (p=0,097); with an intended 300µm cut depth mean corneal flap thickness is 295µm±45 (p=0,665) and with an intended 350µm cut depth mean corneal flap thickness is 374µm±54 (p=0,07). Differences between intended and real corneal thickness of all various cut depth shows no statistic significance.
Conclusions: In all different cut depth the microkeratome LSK-one shows a high accuracy and reproducibility of the intended corneal flap thickness. Because of the manual guide the microkeratome makes a great demand on the surgeon.

Zurück/Back