Chapter 4 CATALYS® System Procedure
Part Number: 0160-6411, Rev A, 02/2019 Page 183 of 314
Software Release: cOS 5.00
Figure 4.22 Proper Placement of Suction Ring
QUICK TIP: ATTACHING THE SUCTION RING
Some physicians prefer to use a speculum. If a speculum is not used, however, the
suction ring seal must be tucked under the eyelids. Tuck the suction ring seal under the
upper eyelid first and then pull down on the lower eyelid and seat the suction ring on the
eye. Tegaderm or tape can be used to keep the eyelashes out of the operating field. Do
not overlap the Tegaderm or tape, as this may restrict the amount of obtainable
exposure.
QUICK TIP: ATTACHING THE SUCTION RING
When placing the suction ring, position your hands where you will want them for the
next few steps. For maximum stability, support your elbow on the arm of the surgeon
chair or on your leg, and position your hands on top of the tubing, with the handle
pointing temporally 0 ±75 degrees for the left eye and 180 ±75 degrees for the right eye.
This allows you to place your entire hand against the patient’s cheek, with your thumb
resting on their forehead. The tips of your pointer finger and thumb should be slightly
higher than the rim of the suction ring to provide tactile feedback in the coming steps. If
the patient’s head is positioned properly and the patient is looking towards the ceiling,
the top of the suction ring should be level with the floor.
2. After positioning the suction ring seal around the limbus, press down firmly to create a
seal.
QUICK TIP: ATTACHING THE SUCTION RING
If the conjunctiva is too loose, pressing down on the conjunctiva with a speculum may
stretch the conjunctiva and allow for a stronger seal.
3. While pressing down on the suction ring, activate the vacuum by depressing the right
(patient vacuum ON) footswitch or by pressing the (patient vacuum)
I
(on) button
on the docking keypad (located on the system front panel directly above the patient).
When vacuum is achieved, the system emits an audible “ding”, and a check mark
displays in the Vacuum panel on the touchscreen.
Equal Amounts of Sclera
Between Dark Gray
Suction Ring Seal and
Limbus
Equal Amounts of Sclera
Between Dark Gray
Suction Ring Seal and
Limbus
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