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27th International Congress of German Ophthalmic Surgeons

15. to 17.05.2014, Nürnberg

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A new way of controlling Venturi pump flow volume in cataract surgery (K)

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  • Makoto Kishimoto - Kishimoto Eye Clinic, Moriyama City, Japan

27. Internationaler Kongress der Deutschen Ophthalmochirurgen. Nürnberg, 15.-17.05.2014. Düsseldorf: German Medical Science GMS Publishing House; 2014. DocVI 2.2

doi: 10.3205/14doc153, urn:nbn:de:0183-14doc1532

Published: May 5, 2014

© 2014 Kishimoto.
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: In cataract surgery with Venturi pumps, pressure and flow volume cannot be set separately. We studied a way to control flow volume more effectively.

Methods: To decrease the flow volume of a venturi pump without reducing the aspiration pressure, it is necessary to adjust the tube diameter using a separate device which increases the resistance of the aspiration line.

The solution was a separation pipe dubbed “Pinocchio”.

Results: The tube narrows behind the separation Pipe. This allows flow volume to be controlled as low as 40 milliliters per minute even at 300 milliliters of mercury aspiration pressure.

Conclusions: An auxiliary device that can separate vitreous fragments and prevent obstruction, will allow venturi pumps to be used in a wider range of surgical operations, where they might not have been appropriate previously.