User's Manual Part 3

2.66 8065751025
Constellation
®
Vision System
Figure 2-52
Surgery Screen: Vitrectomy Mode-
3D Submode
Vitrectomy: 3D SUBMODE
In the 3D submode, the user controls both the vitreous cut rate and the vacuum
pressure linearly. This submode allows for setting the treadle start and end values for
both the cut rate and the vacuum pressure. Additionally, in Advanced Display Mode
that is shown in Figure 2-52, the Forceps End Pressure can be changed.
In 3D submode, vacuum delivered to the probe and the probe cutting rate are both
regulated by the amount of footpedal depression. The display contains adjustable
values for vacuum level at footpedal start, vacuum level at full depression; and cut
rate at footpedal start, cut rate at full depression. A unique features of this mode are:
1. Vacuum can be set to start at 0 and rise to its maximum setting at full footpedal
depression, while the cutting rate can be set to start at its maximum setting and
decrease as the footpedal is depressed (or any combination thereof).
2. To ensure that not too much flow is generated when the footpedal is first depressed,
the vacuum level is ramped up from 0 to the set starting level during the first part of
the pedal travel.
Aspiration Panel
Vacuum Panel
Configuration Button