Indications for
- Preoperative decompression (stabilization of the acute illness).
- Palliation of advanced malignant cancer (metastasis, recurrent colorectal cancer)
          

General features
- It has TTS (through the scope) và OTW (over the wire).
- TTS: stent loaded into 10.5Fr delivery system for deploying either percutaneous approach or endoscopic approach easily and simply.
- It has 10 radiopaque markers

3.1. D-type - uncovered
- Ideal combination of radial and axial force to maintain full luminal patency in torturous anatomy
- Excellent conformability facilitates immediate and continuous wall opposition.
- Minimum foreshortening rate for accurate placement of the stent.
- Preoperative bridge to surgery for obstructive colorectal cancer
- Palliative treatment for obstructing primary left-sided colorectal cancer
- Radiopaque marker: 4 at the both ends & 2 at the middle

3.2. Head-type
- Inner covered silicone and removal string.
- Radiopaque marker: 4 at the both ends and 2 at the middle

3.3. Comvi-type
- Structure: It has 3 layers: PTFE membrane tube is held between inside and outside D-type stent bodies being integrating into a single structure based on D-type.
- PTFE membrane prevents the risk of tumor-ingrowth very strongly.
- Ideal combination of radial force and axial force to maintain full luminalpatency in tortuous anatomy
- Radiopaque marker: 4 at the both covered part ends