Depending on the surgical needs or preferences, the
surgeon can select a flow pump (peristaltic) or a vacuum
pump (Venturi).
The R-Evo Smart E has only a peristaltic pump.
The I/A cassette is housed on the pump plate on the side of
the machine.
The fluids and particulate materials are aspirated with the
distal end of the tip and deposited in the collection tank of
the I/A cassette.
A vacuum safety sensor monitors the vacuum level in the
aspiration line and adjusts the pump action as required.
This vacuum reading is performed with a "closed system": A
sterile membrane in the I/A Cassette completely separates
the vacuum sensor from the sterile fluids.
CAUTION Risk of infection for the patient's eye!
Do not reuse the single-use material!
The pumps of the R-EVO SMART are controlled by a
microprocessor. The vacuum level can be preset from the
touch screen or controlled by the surgeon with the foot
switch (linear mode).
Vitrectomy
The vitrectomy handpiece connects to the vitrectomy
socket. Essentially it is made up of two parts:
– TIP OF THE CUTTER (blade) and
– BODY (containing the compressed air drive mechanism).
The vitrectomy handpiece uses the single-acting actuator
principle: the pressure causes the blade to move forward
(closing the cutting port). When the pressure is no longer
applied, the return movement is achieved by a built-in
spring.
The tip contains the cutting element formed by an external
part (fixed) and an inner tube, which moves
forward/backward in a longitudinal direction, the two tubes
are matched to each other.
The inner tube is used for aspiration, it and has a blade at
the front end with a sharp outer edge. At the front end, the
outer tube has a side opening for cutting and aspiration.
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