gms | German Medical Science

22nd Annual Meeting of the German Retina Society

German Retina Society

26.06. - 27.06.2009, Berlin

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Comparison of silicone oil flow rates depending on the cannula type and pressure applied: Focus on Siluron 2000

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  • Hakan Kaymak - Bundesknappschafts' Eye Clinic Sulzbach/Saar
  • N. Hagedorn - Fluoron GmbH, Neu-Ulm
  • C. Lingenfelder - Fluoron GmbH, Neu-Ulm
  • U. Mester - Bundesknappschafts' Eye Clinic Sulzbach/Saar

German Retina Society. 22nd Annual Meeting of the German Retina Society. Berlin, 26.-27.06.2009. Düsseldorf: German Medical Science GMS Publishing House; 2009. DocRG2009-30

doi: 10.3205/09rg31, urn:nbn:de:0183-09rg314

This is the English version of the article.
The German version can be found at: http://www.egms.de/de/meetings/rg2009/09rg31.shtml

Published: June 29, 2009

© 2009 Kaymak et al.
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by-nc-nd/3.0/deed.en). You are free: to Share – to copy, distribute and transmit the work, provided the original author and source are credited.

Outline

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Purpose: The objective of this study was to test the applicability of the new silicone oil, Siluron 2000 in comparison with standard silicone oils, Siluron 1000 and Siluron 5000, with respect to small gauge surgery.

Setting: Siluron 2000 is a Siluron 1000 / high molecular weight additive (2.500.000 mPas) blend with a viscosity of about 2000 mPas.

Methods: To determine and compare the flow rates of silicone oil tamponades with different viscosities, the oils were pushed through cannulas of different size (20 Gauge, 20 G Kirchhof cannula, 23 Gauge, 25 Gauge) using a Geuder Megatron S3. In addition, different pressures were applied (1,5 bar, 3 bar, 6 bar). The amount of silicone oil was determined after 30 seconds running time by weighing of the components. Every test was repeated ten times.

Results: The flow rates of the various silicone oils tested were different depending on the cannula type. Interestingly, the flow rates showed a nonlinear course depending on the viscosity. In detail, Siluron 2000 is applicable through a 20 G cannula without any problems. This new silicone oil could also be utilized in a reasonable way through a 23 G and 25 G needle, however at a pressure of 6 bar. In comparison, the application of Siluron 1000 was easily done regardless of the conditions used. The applicability of Siluron 5000, however, even at 6 bar, decreases rapidly with decreasing cannula size.

Conclusion: Siluron 2000 could be easily applied throught a 20 gauge needle. Importantly, its application through the smaller 23 and 25 gauge cannulas is much easier to perform compared to Siluron 5000.