PULSAR
2
ESP
Installation and Operating Manual
OPTIKON 2000
Cod. 111007EN Rev.E
7-2
performed with a “closed system”: a sterile membrane in the ACS3 cassette
completely separates the vacuum sensor from the sterile fluids.
The pumps in the PULSAR
2
are controlled by a powerful microprocessor. Vacuum
level can be panel preset or controlled by the surgeon via the system footswitch
(linear mode).
VITRECTOMY (VIT)
The vitrectomy probe basically consists of two parts: the cutter tip (blade) and the
body containing the drive mechanism actuated by compressed air coming from
PULSAR
2
console.
The probe uses the single acting actuator principle. Here air power is used to make
the unit out-stroke (extend). Once the pressure has been removed, the return (in-
stroke) is achieved by mechanical means, in this case by a built-in spring.
The tip contains the cutting element consisting of a matched outer (fixed) and
inner longitudinally reciprocating tube.
The inner tube, used for aspiration, has a front end blade with sharpened outer
edge. The front end of the outer tube has a side opening for cutting and
aspiration. The tissues are cut and simultaneously aspirated by the longitudinal
reciprocating action of the inner tube, generated by pneumatical impulses
received from the control console.
The extremely close tolerances between the inner and outer tube create a mild
constant tension to provide a self sharpening effect. It is evident that such
precision plus the guillotine design results in an ideal cutting property. The cutting
speed (from 60 to 2500cuts/min) and vacuum level (from 5 to 500mmHg) are
adjustable with the mode selection and function keys on the control console.
BIPOLAR DIATHERMY
The bipolar diathermy uses Radio Frequency (RF) currents to produce heating in
body tissues, thus causing coagulation. The output of a powerful RF oscillator
(within the control console) is applied to a pair of electrodes, in the form of
microforceps or pencil probes, which are applied to the biological tissue to be
treated. The body tissue becomes the dielectric of a capacitor, and dielectric
losses cause coagulation of the tissue. Dielectric loss phenomenon ensures that
only the precise area of tissue is coagulated. The application of bipolar high
frequency RF output additionally minimizes undesired neuromuscular stimulation
and eliminates the need of a plate thereby reducing patient hazard. The PULSAR
2
unit provides adjustable output power from 0.1 to approximately 7 watts @ 450
ohm, which is ideal for ophthalmic procedures.
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