Additional working channel with flexible spacer cap for a variety of endoscopic procedures

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About the AWC®duo

With the AWC®duo, we have created a flexible instrument that can be used for a variety of endoscopic procedures. This further development of the AWC® (Additional Working Channel) offers even more freedom for resection procedures. The AWC®duo is attached to the outside of a conventional single-channel gastroscope or colonoscope and allows bimanual working and triangulation. It can therefore provide valuable assistance with demanding techniques such as ESD, for example by providing traction through an additional instrument, thereby significantly simplifying the procedure.

The AWC®duo consists of various components, including:

  • Flexible, transparent distance cap allows a good view of the target area, e.g. during ESD.
  • Working channel with connector: the working channel has a diameter of 3.5 mm and is suitable for instruments with a diameter of up to 3.2 mm.
  • Attachment clip for stable fixation of the additional working channel to the endoscope handle.

Advantages of the AWC®duo

  • Spacer cap and additional working channel in one
  • Enables bimanual working with conventional single-channel endoscopes
  • Triangulation when using two instruments facilitates working
  • Additional lumen for suction or irrigation
  • Facilitates numerous endoscopic procedures, including resection techniques such as EMR and ESD

Areas of application of the AWC®duo

AWC®duo can be used in all endoscopic procedures where an additional instrument may be helpful. These include, among others:

  • EMR: resection of lesions using a snare
  • ESD: dissection of larger lesions using the cap
  • +techniques: EMR+ and ESD+ enable more traction and thus optimized resection through the additional use of a grasper
  • Clip removal: easier removal of OTSC® Clips by simultaneaously using a gripper to fix the clip
  • Bleeding: additional lumen for suction and irrigation
  • Other endoscopic procedures where additional instruments or lumen may be helpful

For beginners and advanced users of resection techniques

As part of the RESECT+ Product family, the AWC®duo offers the right solution for every phase of demanding resection techniques and provides optimum support for both experienced users and beginners:

EMR Hybrid techniques / + techniques ESD

The AWC®duo supports EMR by allowing the use of additional instruments and post-injection without changing instruments. The integrated spacer cap ensures opimized visibility and better control of the endoscope.
With EMR+, the additional working channel is used, for example, to grasp the lesion with the OTSC® Anchor or a grasper, thus simplifying resection with the snare.

With Hybrid-ESD+, the tissue flap is lifted with the gripper or the flexible spacer cap after the initial incision and the additional traction simpligies the resection. The spacer cap also ensures an optimized view and better control of the endoscope during the procedure.

With ESD+, a grasper can be used via the additional working channel. The additional traction facilitates resection, as does the use of the spacer cap, which improves visibility and allows better control of the endoscope during the procedure.


With the AWC®duo, advanced users have the freedom to combine instruments as required. The spacer cap supports the classic ESD by improving visibility and control of the endoscope, while the additional working channel is available for other instruments if required, such as a grasper. This allows users to save time during the procedure and resect larger resectates.
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