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OS 4 Up™ pump systems

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.

Internal components of the OS 4 Up ophthalmic system showing fluidics
Fluidics based on physics

Choose your preferred pump system

  • Icon representing SPEEP pump combining controlled flow and rapid vacuum, shown by wave lines and upward arrows

    Unique SPEEP Pump
    Control flow and vacuum

    SPEEP combines the advantages of a flow-controlled peristaltic pump with the dynamics of a vacuum-controlled Venturi pump. With SPEEP, both flow and vaccum are controlled independently*.

  • Icon representing peristaltic pump flow with continuous wave lines indicating controlled, steady fluid movement

    Peristaltic pump
    Control the flow

    The peristaltic pump is flow-based, and though it can be finely tuned, the vacuum can only be built up by occlusion up to the preset limit. The higher the flow, the more speed you will get.

  • Icon representing Venturi pump vacuum with upward arrows indicating rapid vacuum build-up and flow dynamics

    Venturi pump
    Control the vacuum

    The Venturi pump is vacuum-based. The vacuum builds quickly and is adjustable, but the flow is not directly controllable. The higher the power, the more speed you will get, the same effect as a vacuum cleaner.

Standardised cassette type

One cassette for anterior and posterior surgery

Thanks to the standardised cassette type, you can switch quickly between the pump systems and structure your surgical workflow efficiently. The desired pump system can be assigned per programme, enabling immediate use of the preferred and procedure-specific technique*.

side view of the OS 4 Up cassettte
Oertli community

Why SPEEP matters in vitreoretinal surgery

«Simultaneous control of both vacuum and flow with SPEEP provides excellent stability and minimizes intraocular pressure fluctuations. Solutions for fluidic control, safety and cutting efficiency in Oertli's platforms allow rapid, secure and continuous progress for both junior and expert vitreoretinal surgeons.» (D)

MD Anis Mahmoud
Taher Sfar University Hospital, Mahdia, Tunisia

Ophthalmologist with a smile because of a Oertli device
Fluidics principle

SPEEP, Venturi or Peristaltic? The 10-minute guide

Join Prof. Matthias Bolz for a crash course on pump systems. Learn the fundamental differences between SPEEP, Venturi, and Peristaltic pumps and discover how to choose the right system for your surgical needs.

Prof Matthias Bolz presenting SPEEP, Venturi or peristaltic pump systems in a booth talk for non technicians
Expert insights

Get your white paper here

eagle on the water as a key visual for oertli
Peristaltic and Venturi in comparison

Peristaltic or Venturi? Understanding the difference

Every procedure demands specific fluidics. From understanding linear flow to rapid vacuum dynamics, this video explains how different pump technologies impact your surgical procedures.

Comparison of peristaltic and Venturi pump systems in ophthalmic surgery with schematic illustrations
FAQ

In a nutshell about pump systems

In focus

Selected innovations
of the OS 4 Up

  • ophthalmologist with the continuous flow cutter

    Constant flow for efficient vitreous removal

    The Continuous Flow Cutter ensures continuous aspiration thanks to its permanently open port and up to 15'000 cpm, resulting in reduced traction on the retina.

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  • Maintain IOP with Dynamic infusion.

    Dynamic infusion extends traditional Passive and Active infusion through adaptive IOP management. Discover how it compensates for intraocular pressure changes, helping keep IOP settings near physiological levels.

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  • IOP reduction.
    Zero implants

    Experience High Frequency Deep Sclerotomy (HFDS): An implant-free, ab interno MIGS procedure that aims to lower intraocular pressure by reducing the outflow resistance of aqueous humour.

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