The tissues are cut and aspirated simultaneously, thanks to
the reciprocal longitudinal action of the inner tube,
generated by pneumatic impulses coming from the surgical
system.
The extremely close distance between the outer and inner
tubes creates a slight constant tension that provides a self-
sharpening effect. It is evident that this precision combines
with the guillotine design to offer ideal cutting properties.
The cutting speed (60 to 5000 cuts/min Vit, and 120 to
10.000 cuts/min Twedge for the R-Evo Smart CR) and
vacuum level (5 to 650 mmHg) can be adjusted using the
graphical control elements on the touch screen.
Bipolar diathermy
Bipolar diathermy uses radiofrequency (RF) currents to
produce heat on the body's tissues and then cause
coagulation. The energy of an RF oscillator (inside the
device) is led to a pair of electrodes (diathermy pliers or
diathermic pencil) that touch the biological tissues to be
treated. The application of high-frequency bipolar (RF)
contributes to the reduction of unwanted neuromuscular
stimulation.
Both surgical systems generate an output power
adjustable from 0.1 to about 9 Watt @ 200 Ω.
Illumination (R-Evo Smart CR only)
The R-Evo Smart CR has two high intensity LED lamps
(source for fibre optic lighting), provided with filters for
protection of the retina from the blue component of the
light and to obtain optimal viewing conditions during the
retinal surgical procedures.
Each of the two independent lighting systems is powered by
an LED lamp focused on the head of the optical fibre. LED
lamps emit no radiation outside the visible spectrum, for
this reason, no UV or IR protection filters are required and
maximum safety for the patient is guaranteed. An
electronic system allows adjustment of lighti intensity on
20 levels, without affecting the colour of the light. Three
yellow filters (435nm, 475nm and 515nm) are available to
emphasize the presence of membranes when dyes are used
and to protect the patient's eye from unnecessary exposure
to blue light radiation, allowing for long-lasting treatments.
A green filter improves the contrast, even in the absence of
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