Introduction to 27G

  • Ulrich Spandau
  • Mitrofanis Pavlidis


The most essential development of small-gauge vitrectomy was the introduction of a trocar which rests inside the sclera. Instruments are much easier introduced, the trocar protects the sclera against injury through the instruments and a trocar is easier to find than a usual sclerotomy. The disadvantage of the trocar compared to the usual sclerotomy is the excessive leakage of fluid through the trocars.


Macular Hole Poiseuille Equation Permanent Flow Double Cutting Small Instrument 
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Supplementary material

332932_1_En_1_MOESM1_ESM.mpg (9 mb)
Video 1.1 Flow regular cutter (MPG 9184 kb)
332932_1_En_1_MOESM2_ESM.mpg (7.5 mb)
Video 1.2 Flow TDC cutter (MPG 7636 kb)
332932_1_En_1_MOESM3_ESM.mpg (7.1 mb)
Video 1.3 TDC cutter without fluid (MPG 7306 kb)
332932_1_En_1_MOESM4_ESM.wmv (9.2 mb)
Video 1.4 Left regular cutter Right TDC cutter 6000 cpm_450 mmHg (WMV 9422 kb)
Video 1.5

Comparison_23G regular cutter vs 25G TDC cutter (WMV 10435 kb)

Copyright information

© Springer International Publishing Switzerland 2015

Authors and Affiliations

  • Ulrich Spandau
    • 1
  • Mitrofanis Pavlidis
    • 2
  1. 1.Department of OphthalmologyUppsala University HospitalUppsalaSweden
  2. 2.Augencentrum KölnCologneGermany

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