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Delivery assist catheters for mechanical thrombectomy: a systematic review
Julien Ognard1, Gerard El Hajj1,2, Dina Ramadan3
1Department of Radiology, Mayo Clinic, Rochester, MN, USA.
Expert Review of Medical Devices
|January 13, 2026
Summary
Novel tapered delivery assist catheters improve mechanical thrombectomy for acute ischemic stroke by enhancing navigation and clot engagement. These devices show high success rates and low complication rates in treating stroke patients.
Area of Science:
- Medical Devices
- Interventional Neurology
- Vascular Surgery
Background:
- Mechanical thrombectomy is a key treatment for acute ischemic stroke.
- Challenges include navigating tortuous anatomy and the 'ledge effect' with current devices.
Purpose of the Study:
- To systematically review novel tapered delivery assist catheters for mechanical thrombectomy.
- To analyze their design, regulatory status, technical performance, clinical outcomes, and safety.
Main Methods:
- A PRISMA-guided systematic review was conducted.
- Literature search included studies and reports on tapered delivery assist catheters up to July 2025.
Main Results:
- 18 reports covering 7 distinct catheters met inclusion criteria.
- Devices feature smooth tapered distal tips to minimize gaps and facilitate navigation.
- Successful trackability and clot engagement exceeded 90% in most cases, often without a guidewire, with low complication rates.
Conclusions:
- Tapered delivery assist catheters are an innovation in thrombectomy.
- Further studies will clarify their impact on procedural efficiency and patient outcomes.
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