Key Takeaways
- Clinical Bottom Line
- The clip question is no longer a blanket rule
- Where guidelines still support closure
- Why the evidence became more complicated in 2025
Clinical Bottom Line
| Resection scenario | 2026 practical answer |
|---|---|
| Routine polypectomy defect <20 mm | Do not routinely place prophylactic clips. |
| Proximal nonpedunculated lesion >=20 mm removed by EMR | This remains the strongest case for clip closure if complete, efficient closure is technically achievable. |
| Distal large lesion | Routine clip closure is harder to justify because benefit is less consistent. |
| Antithrombotic use | The argument for clip closure is stronger when the lesion is proximal, large, and the patient has bleeding-amplifying medication risk. |
| Cost-conscious use | Clip closure can be economically reasonable in selected proximal large lesions, but only when clip count and cost stay controlled. |
The clip question is no longer a blanket rule
Prophylactic clipping after colorectal resection is easy to oversimplify. The right answer in 2026 is not “clip everything” or “clip nothing.” It is much more lesion-specific than that.
For the everyday endoscopist, the cleanest starting point is still the AGA 2024 rule: do not routinely use clips to close resection sites for polyps under 20 mm. That one statement removes a large amount of unnecessary clipping from ordinary practice.
Where guidelines still support closure
The main exception is large right-sided EMR. ESGE’s 2024 update recommends prophylactic clip closure of the mucosal defect after EMR of large nonpedunculated polyps in the right colon to reduce delayed bleeding. That recommendation reflects the enduring concern that proximal large hot EMR defects bleed differently from routine small-polyp sites.
So the modern default looks like this: no routine clips for ordinary small defects, but a lower threshold for closure after proximal EMR of lesions at or above 20 mm, especially when the defect can be closed completely and efficiently.
Why the evidence became more complicated in 2025
The 2025 CLIPPER trial challenged the idea that all large proximal EMR defects should be clipped in daily practice. In 356 patients with proximal lesions >=20 mm, delayed bleeding occurred in 9.0% of patients assigned to prophylactic clipping versus 6.1% without clipping. In that pragmatic setting, clipping did not reduce delayed bleeding.
That result matters. It tells us that the benefit seen in prior high-volume-center studies may not translate automatically to every defect, every unit, and every closure attempt.
Why many experts still do not abandon selective clipping
The strongest argument for selected use comes from the 2022 individual patient data meta-analysis. Across 5380 patients and 8948 resected polyps, prophylactic clipping reduced delayed bleeding in proximal polyps >=20 mm with an odds ratio of 0.62 and a number needed to treat of 32. In patients using antithrombotics, the signal was stronger, with an odds ratio of 0.59 and number needed to treat of 23.
In other words, the post-CLIPPER world is not a world where clips are useless. It is a world where their value is concentrated in a narrower group than many clinicians once assumed.
A practical risk-based approach
| Clinical scenario | Better default |
|---|---|
| 6 mm cold snare defect in the sigmoid | No clip. |
| 12 mm nonpedunculated lesion removed en bloc | No routine clip unless there is a separate bleeding issue that needs treatment. |
| 25 mm cecal EMR defect in a patient on antithrombotics | Strong case for complete prophylactic closure if feasible. |
| 30 mm proximal defect that cannot be meaningfully closed | Do not create a false sense of security with partial, low-value clipping. Focus on resection quality, hemostasis, and post-procedure planning. |
| Very large proximal lesion >=40 mm | Selective closure may still be economically and clinically reasonable when defect geometry and clip count make it achievable. |
Cost still matters
The 2026 cost-effectiveness analysis adds an important practical layer. For proximal large nonpedunculated colon polyps, prophylactic clipping was cost-saving in the base case and remained cost-effective when per-clip cost stayed below $217 or fewer than 4 clips were used. For lesions >=40 mm, closure was still cost-effective. For patients on antithrombotic therapy, clipping was cost-saving when clip use stayed restrained.
That means the economics favor selective, disciplined clipping. They do not support reflexive clip dumping on every polypectomy site.
What to stop doing in 2026
- Stop routinely clipping ordinary defects under 20 mm.
- Stop pretending that every proximal EMR defect gets the same benefit from closure.
- Stop counting partial closure as proof that delayed bleeding risk has been solved.
- Stop ignoring lesion location, defect size, and antithrombotic exposure when deciding whether clips are worth using.
Selected references
- AGA Clinical Practice Update on Appropriate and Tailored Polypectomy. Clin Gastroenterol Hepatol. 2024.
- ESGE Guideline Update: Colorectal polypectomy and endoscopic mucosal resection. 2024.
- The Role of Clips in Preventing Delayed Bleeding After Colorectal Polyp Resection: An Individual Patient Data Meta-Analysis. Clin Gastroenterol Hepatol. 2022.
- The Effect of Prophylactic Clipping on Delayed Bleeding After Proximal Colonic Endoscopic Mucosal Resection (CLIPPER). Endoscopy. 2025.
- Prophylactic Clipping versus No Clipping after Endoscopic Mucosal Resection of Large Nonpedunculated Colon Polyps: A Cost-Effectiveness Analysis. Gastrointest Endosc. 2026.
Last reviewed April 17, 2026. This update is written for clinicians trying to decide whether prophylactic clip closure after polypectomy will meaningfully change risk in the patient in front of them.
