Cataract Clinical Trial
Official title:
Comparison of Phacoemulsification Platform Stellaris With Standard Infusion and Stellaris Elite With Pressurised Bottle in Myopic Eyes Concerning Deepening of Anterior Chamber as Measured by Intra-operative OCT
Clinical performance of phacoemulsification platform Stellaris Elite with standard irrigation fluid bottles in myopic eyes. Anterior chamber depth and patients comfort will be compared between the two groups.
Today phacoemulsification is the most important and safest procedure to perform cataract
surgery. However, there are factors that can increase the risk of complications, one of them
is an intraoperative increase of intraocular pressure (IOP) which may cause choroidal
haemorrhage, capsular block syndrome, or posterior capsular rupture .
Also, more regularly, alterations of IOP provoke sudden changes of the anterior chamber
depth, especially in myopic eyes due to intra-operative inverse irido-capsular block, which
may result in pain or discomfort for the patient. The deepening of the chamber also makes the
surgical maneuvers more challenging in such eyes.
As prevention of such adverse events, it is important to maintain a more or less constant IOP
intraoperatively. To ensure this, the pressure of the irrigation fluid must be adjusted to
the outflow of aqueous humor, usually by adapting the height of the irrigation fluid bottle
(passive fluidics system). As a variable vacuum is produced at the phaco tip to enable the
suction of lens fragments, there often are fluctuations of IOP, therefore the surgeon is
required to constantly adjust the height of the irrigation fluid bottle.
A novel method to relieve the surgeon of this often-distracting task is to use all-in-one
phacoemulsification systems that are able to monitor vacuum flow rates and then adjust the
pressure of the irrigation fluid intraoperatively, also resulting in less fluctuations of IOP
(active fluidics system). This should also result in reduced deepening of the anterior
chamber and less risk of the adverse events as explained above.
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