Mechanical thrombectomy,
does it really help with Reduced 90-day disability and increased good functional status after acute basilar-artery occlusion stroke?
research showsThe grade is B. ATTENTION and BAOCHE found large absolute gains of about 23 and 22 percentage points in 90-day mRS 0-3. Four authors overlapped, however, and the independent BASICS team did not confirm improved functional independence, so the exceptional A requirement for independent replication is not met; the score is B with 79 points.
ads claimMarketing should report 90-day disability and procedural harms, not recanalization success alone.
Useful facts when choosing a product
- Mechanical thrombectomy uses an endovascular catheter to retrieve or aspirate an occluding clot.
- Anterior-circulation verdict 1152 is A with 97 points and pools individual data from five randomized trials, a broader evidence base than this posterior-circulation record.
- Eligibility depends on imaging, clinical severity, timing, and emergency stroke-team assessment.
What the research actually shows
ATTENTION randomized and analyzed 340 participants, 226 versus 114. BAOCHE randomized and analyzed 217, 110 versus 107. ATTENTION used university-hospital and nonprofit funding and BAOCHE used Chinese science-ministry funding, but overlapping investigators fail the rule requiring independence of both investigators and funding.
Why this is classified as B (79)
Large patient-centered functional benefits were consistent, but independent-investigator confirmation is absent, giving B with 79 points.
Counterpoint. The grade applies to imaging-confirmed acute basilar occlusion in patients resembling trial eligibility, not every posterior-circulation stroke.
Rejudgment record. Cross-check applied — Large 90-day functional benefits were consistent, but shared authors in the pivotal trials and nonconfirmation in independent BASICS prevent independent replication
| Endpoint | P | Patient-reported treatment goal - the symptom is the goal |
| Replication | R1 | Single confirmatory trial |
| Independence | I2 | Decisive evidence is publicly or non-profit funded |
| Effect size | E+ | Meets the clinically important threshold |
The scoring table and the verdict agree (B).
Sub-claim grades by effect
This ingredient is marketed for several effects. A single overall grade blends strong and weak claims together, so each effect is graded separately here. The overall grade reflects the strongest disconfirming or core claim.
| Effect (sub-claim) | Grade | Basis |
|---|---|---|
| Increased 90-day modified Rankin score 0-3 | B | Two trials showed consistent absolute increases of about 22-23 points, but the investigators were not independent. |
| Increased functional independence at 90 days | B | Stricter outcomes favored treatment in the two pivotal trials, but independent BASICS did not confirm functional independence. |
Cross-check — Codex and Claude
Evidence Table
| Study | Design | Sample | Funding | Endpoint | Result | Weight |
|---|---|---|---|---|---|---|
| Study 1 | Multicenter randomized open-label superiority trial with blinded endpoint assessment | 114 | Chinese university-hospital innovation program and nonprofit stroke and cardiovascular foundations | Primary endpoint: modified Rankin score 0-3 at 90 days | 104/226 (46%) versus 26/114 (23%), adjusted risk ratio 2.06 (95% CI 1.46 to 2.91), P<0.001. | Pivotal randomized functional-outcome evidence |
| Study 2 | Multicenter randomized open-label superiority trial with blinded endpoint assessment | 107 | Public grant from the Chinese National Ministry of Science and Technology | Primary endpoint: modified Rankin score 0-3 at 90 days | 51/110 (46%) versus 26/107 (24%), adjusted risk ratio 1.81 (95% CI 1.26 to 2.60), P<0.001. | Consistent randomized trial with overlapping authors |
Receipt — 2 References
All 2 cited sources were verified for existence at the original page (as of 2026-08-01).
Reviewed and approved: Chamgap Editorial Team · Approval date: 2026-08-01 · Corrections: none
Cite this verdict
[Chamgap] Mechanical thrombectomy x 90-day functional recovery after basilar-artery occlusion — Evidence Grade B·79. 2 cited sources checked. Source: https://chamgap.com/en/verdicts/cognition/mechanical-thrombectomy-basilar-artery-occlusion-functional-outcome/ · CC BY 4.0CC BY 4.0 — free to use with attribution; do not distort grades, numbers, or verdict meaning.
What this document does and does not do
Chamgap is an information source. It reports what research has and has not confirmed; it does not tell readers what to take or buy. That decision belongs to readers and, when needed, medical or legal professionals. This verdict reflects literature available up to the search date and may change as new research appears. Nothing here is medical advice.