Used DORC EVA

EVA in Vacuum or Flow mode... No longer do surgeons have to choose between the imperfections inherent in either peristaltic or venturi pumps. The aspiration system of EVA is based on the peristaltic principle but does not work like traditional roller pumps. The EVA flow mode is like a peristaltic mode, but without the pulsatile vacuum and with a precision of 0.1 cc. SEE DIAGRAM 1 The EVA vacuum mode is like a venturi mode, but can be very fast in the buildup of the vacuum compared to other systems (0.3s). SEE DIAGRAM 2 Besides these benefits, the strength of the EVA aspiration system is also in the fact that it is possible to switch between the two modes during the surgery; vacuum or flow. Eva in use…. Depending on the stage of the surgical procedure you may want to utilize the vacuum or the flow mode. In general, the vacuum mode is utilized when traction and a fast build up of vacuum is needed to grasp and hold tissue, while the flow mode is utilized for maximum control and delicacy. Of course the preference of the surgeons must be taken into account, making use of the mode they are more confortable with. For VitreoRetinal procedures, posterior hyaloid lifting... For lifting the posterior hyaloid the vacuum mode could be used to quickly grasp and hold it during the lifting. Due to the quick vacuum response time, the vacuum is created in a short time and the posterior hyaloids can be lifted. Peripheral Vitrectomy / Vitrectomy near a mobile retina... When vitrectomy is applied in the periphery or near a mobile retina it is best to utilize the flow mode. In the flow mode, it does not matter whether the vitrectomy tip is in the vitreous or in the BSS, the aspiration flow will remain the same ensuring a smooth vitrectomy with minimal traction. Unlike the vacuum mode, in the flow mode the flow can be controlled from 0 cc/min, while the vacuum mode always has a minimum flow due to the pressure difference of the irrigation pressure and the minimum vacuum setting.