Developed for a stable IOP

An important criterion during eye surgery is a stable intraocular pressure (IOP). To maintain this IOP, the Faros offers two options of infusion systems: the active as well as the gravity infusion.

Active infusion
The gas-driven active infusion is available on the OS 4 and Faros devices. In the posterior segment version, the Faros offers active infusion in cataract surgery. In the case of bleeding or other situations requiring high pressure, the active infusion can react quickly and reach a pressure of up to 120 mmHg. The active infusion is independent of the room height as the BSS bottle is suspended from a fixed hook. It is connected to the compressed air outlet (GFI = Gas Forced Infusion) via a Luer lock connection, whereby the connection is colour-coded to avoid installation errors.

Gravity infusion
The gravity infusion is mechanical driven and available on all three Oertli platforms: OS 4, Faros and CataRhex 3. Like the active infusion, the gravity infusion is also designed for stable IOP during surgery. Pressure can go up to 100 mmHg or 135 cm, and both setting values are selectable. As the tubing set is part of most phaco and vitrectomy single-use packs from Oertli, the gravity infusion is an economical solution.

To be able to rely on a stable IOP throughout the surgical procedure, several functions are required to work hand in hand. When you use our active or gravity infusion system with our phaco or vitrectomy instruments, you are relying on a closed and matched system which is a key to a stable IOP.


Active infusion

  • Available for the OS 4 and Faros[1]
  • Gas-driven
  • Developed for a stable IOP
  • Pressure up to 120 mmHg (values from OS 4)
  • Rapid response time in case of pressure change (e.g. in case of bleeding)
  • Independent of room height due to fixed height of bottle

Gravity infusion

  • Available on the OS 4, Faros and CataRhex 3
  • Mechanical driven
  • Developed for stable IOP
  • Pressure up to 100 mmHg / 135 cm (depending on eye level above ground)
  • Economic solution as part of phaco/vitrectomy packs
  • Controllable in cm or mmHg


Comparison of active infusion with gravity infusion at the same pressure level before and after the pressure change.

The maximum IOP is reached quicker with the active infusion than with the gravity infusion.


Comparison of active infusion with gravity infusion in terms of achievable IOP.

A pressure of up to 120 mmHg can be achieved with the active infusion set. When the IV pole of the Faros is fully extended, an IOP of 95 mmHg can be achieved with gravity infusion. This therefore allows a higher pressure to be achieved with active infusion.

A closed system by Oertli

All the instruments for your phaco surgery.

Oertli data on file

[1] Available with combined Faros platform (anterior/posterior) in anterior segment surgery only.