Home
OS 4 Up™ infusion systems

Maintain IOP with
Dynamic Infusion

During surgery, intraocular pressure can change continuously. Dynamic infusion extends traditional Passive and Active infusion through adaptive IOP management.

frontal view of the OS 4 Up ophthalmic system
IOP management

Choose between three infusion systems.

  • Diagram of dynamic infusion in OS 4 Up

    Dynamic infusion
    Close to physiological level

    Dynamic infusion compensates for changes in intraocular pressure. This allows IOP settings close to the physiological level while supporting stable intraocular conditions, even at high flow and vacuum settings.

    arrow-right
  • Diagram of active infusion in OS 4 Up

    Active infusion
    Constant pressure control

    Active infusion generates a constant infusion pressure via the air supply to the BSS bottle and allows settings of up to 120 mmHg. It can be used with standard 500 ml BSS bottles made of glass or plastic*.

  • Diagram of passive infusion in OS 4 Up

    Passive infusion
    Gravity-controlled pressure

    The passive infusion follows the traditional principle where pressure is determined by bottle height and regulated by gravity. It is mechanically driven, can be controlled in cm or mmHg, and is an economical solution as part of most phaco and vitrectomy packs*.

Dynamic infusion

Reduce IOP settings.
Stay stable.

The OS 4 Up monitors pressure changes (red line) and applies dynamic infusion pressure (yellow line) to achieve stable intraocular conditions (white line).

Graphic illustrating dynamic infusion technology
Dynamic infusion comparison

Emulsification with and without Dynamic infusion

The video shows a side-by-side comparison of emulsification with and without Dynamic infusion in a porcine eye wetlab. In the sequence shown, Dynamic infusion appears to provide a more stable intraocular environment during emulsification.

Side by side intraocular view comparing Dynamic Infusion off and on, showing improved anterior chamber stability with Dynamic Infusion activated
Dynamic infusion stabilising intraocular pressure at lower IOP settings
Dynamic infusion maintaining stable intraocular pressure in the anterior chamber
Surgical flexibility

Adaptive infusion for
cataract and vitrectomy

Side view of the OS 4 Up ophthalmic system
frontal view of the OS 4 Up ophthalmic system

Dynamic infusion extends the versatility of the OS 4 Up across both anterior and posterior segment surgery. Operating alongside the unique SPEEP or peristaltic pump, it supports a fluidics setup aligned with diverse surgical needs.

Oertli community

Why Dynamic infusion
is the future

«It changes a lot regarding pressure and control over the anterior chamber. There is a little bit of a learning curve with it. Already today, my phaco times are much lower than in the normal surgeries and I'm really convinced that’s the future of technology». (D)


Dr. Florian Sutter
Eye Clinic Herisau and Appenzell, Switzerland

Ophthalmologists performing eye surgery with OS 4 Up system
FAQ

In a nutshell about infusion systems

In focus

Innovations for cataract and vitreoretinal surgery

  • 23G trocar with incision knife for controlled scleral entry

    Smooth trocar placement

    The new Caliburn Trocar System is designed around the key elements of smooth trocar placement. From bevelled cannula design to tactile orientation and integrated handling features, every detail works together so you can enjoy surgery.

    arrow-right

  • Master fluidics with a three pump system

    The OS 4 Up combines three pump systems on a single platform: Peristaltic, Venturi and SPEEP. This gives surgeons the flexibility to choose the fluidics principle that best matches their preferred technique and intraoperative handling.

    arrow-right

  • PACS: Adaptive phaco control

    By detecting resistance at the phaco tip and adjusting energy delivery in real time, it contributes to precise, controlled and efficient work under stable chamber conditions.

    arrow-right