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G. S. Murthy, S. Thyagarajan, V. Sharma, M. H. Soni; Simple Alternative of Flute (Back Flush) Cannula for Vitreo-Retinal Surgical Procedures. Invest. Ophthalmol. Vis. Sci. 2008;49(13):6000. doi: https://doi.org/.
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© ARVO (1962-2015); The Authors (2016-present)
To report the constrction of an inexpensive single use alternative for the flute(back flush) cannula in Vitreo- retinal Surgical procedures.
The essential components of back flush cannula were assembled using a 20gauge blunt tip cannula and a leur 3-way tap.The exit port is made by removing a cap from the port and this can be easily occluded by the surgeon's finger to prevent flow of fluid or gas from the eye. Removal of the occlusion will permit flow through the exit port. It can also be used for 23G and 25G vitrectomy systems by simply changing the disposable cannula on the leur 3 way tap. Our model also aids the convenient introduction of dye for epiretinal membrane peel procedures. A syringe containing the dye can be attached to one of the taps in the three way-tap component. The alternative instrument was used in 110 consequtive vitrectomy procedures for 20G and 23G systems.
Intraoperatively, our cannula required no extra effort to insert or handle compared to the original model and no complications were experienced. It can be used for a variety of procedures including vacum cleaning of sedimented blood from the retinal surface,internal drainage of subretinal fluid through a hole in the retina, manipulation of the flap of a giant retinal break, and simultaneous exchange of intraocular fluid for air or silicone oil. In addition, the unit financial cost of this disposable Flute (back flush) cannula is considerably lower than both the original Charles flute needle and the modified Moorfields model and foregoes cleaning costs.
This instrument is as safe and effective as the original and benefits from being inexpensive and easily constructed from components ubiquitous to surgical units.
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