Gastric Outlet Obstructions Tailored Covered Stents for GOO

Study Overview
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Brief Summary
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gastric outlet obstruction tailored versus standard stents for malignant gastric outlet obstruction treatments

Detailed Description
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To determine the shape of the GOOs, stomach opacifications were performed using contrast media before stenting. In the GOO tailored group (33 cases), the distal stents were semi-spherical with a length of 20 mm and a diameter of 28 mm. The middle stent segments had diameters of 20 mm. The proximal ends of large cup-shaped stents had 53.3 ± 5.5 mm diameters and were 15 or 20 mm long, whereas the large funnel-shaped stents had 33.6 ± 3.6 mm diameters and were 25 or 30 mm long. The control group (32 cases) received standard uncovered stents (semi-spherical, with diameters of 28 mm and 20 mm long).Our hypothesis was that unresectable GOO tailored covered stents are superior to the standard uncovered ones in terms of stent re-obstruction and stent migration. In the current study the efficacy and safety of GOO tailored covered stents for the treatment of non-resectable GOOs caused by distal gastric cancer was compared with standard uncovered stents.

Official Title
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A Multicenter Randomized Controlled Trial of Malignant Gastric Outlet Obstruction: Tailored Partially Covered Stents (Placed Fluoroscopically) Versus Standard Uncovered Stents (Placed Endoscopically)

Conditions
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Gastric Outlet Obstruction

Intervention / Treatment
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* Device: Standard stents MTN-CG-s-20/100
* Device: Tailored stents MTN-WE-20/100-A


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: GOO defined by symptoms resulting in decreased oral intake (nausea, vomiting and inability to eat),the obstruction was caused by primary distal stomach cancer and the site of stenosis was between the gastric body and duodenum bulb Exclusion Criteria: the presence of only mild symptoms in patients who could tolerate a liquid diet, clinical evidence of perforation or peritonitis, evidence of multiple small-bowel obstructions because of peritoneal seeding as well as diabetes or other diseases that affect gastric motility and use of promotility agents.
Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Active Comparator: Tailored stents MTN-WE-20/100-A<br>The distal portion of the GOO tailored stents was semi-spherical, with a length of 20 mm, and a diameter of 28 mm. The middle segment had a diameter of 20 mm. The overall length of the stents was 100 mm. Both the middle part and the bottom of the proximal cup segment, and a part of the proximal funnel segment, were covered by a polyethylene membrane. | Device: Tailored stents MTN-WE-20/100-A<br>* cup-shaped or funnel-shaped, according to the shapes of the proximal GOOs.<br>|
| Experimental: Standard stents MTN-CG-s-20/100<br>Standard uncovered stents were used in the control group. The ends of the stents were semi-spherical with diameters of 28 mm and length of 20 mm. The length of the stents was 100 mm | Device: Standard stents MTN-CG-s-20/100<br>* The ends of the stents were semi-spherical with diameters of 28 mm and length of 20 mm. The length of the stents was 100 mm<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Efficiency of Stents | number of participants considered having efficacious outcome. Efficacy is defined by Ingrowth + overgrowth in this study | up to 5 years | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Adverse Events | bleeding, abdominal pain | up to 5 years |