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Journal Club

Cerebrovascular

Is periprocedural sedation during acute stroke therapy associated with poorer functional outcomes?

Journal of NeuroInterventional Surgery | 2010

Rapid review note

Journal Club is a rapid, AI-assisted appraisal layer. It highlights study design, effect estimates, and practice relevance, but it is still a briefing, not a replacement for the paper.

For education only. Not medical advice.

Paper snapshot

Rapid study overview

Open paper

DOI

10.1136/jnis.2009.001768

PMID

N/A

PICO

Population

Seventy-five patients from the IMS II study with anterior-circulation ischemic stroke who underwent angiography and or intervention and had usable sedation data.

Intervention

Heavy sedation or pharmacologic paralysis during acute intra-arterial stroke therapy.

Comparator

No sedation or mild sedation.

Outcomes

Three-month good functional outcome, death, successful reperfusion, and procedural complications.

Design

Type

Post-hoc observational analysis of a prospective multicenter interventional stroke trial

Randomized

No

Multicenter

Yes

Blinded

N/A

Follow-up

3 months

Primary endpoint

Good functional outcome defined as modified Rankin Scale 0-2 at 3 months.

Secondary endpoints

  • Death
  • Successful reperfusion defined as TIMI 2-3
  • Hemorrhage, infection, and access-site complications

Practice impact

What this means

This was not a sedation trial. It was a post-hoc IMS II analysis showing that patients treated with lighter sedation had better reperfusion, lower mortality, and better 3-month outcomes than patients treated with heavy sedation or paralysis. Because deeper sedation was used more often in sicker patients, you should read this as a strong caution signal rather than clean proof of causality.

Bottom line

Use the lightest sedation strategy that is safely feasible during acute stroke intervention, because deeper sedation tracked with worse reperfusion and worse clinical outcomes in this cohort.

Strength of evidence

low

Recommendation

consider change

Why it matters

  • Lower sedation was linked to better functional outcome, less death, and better reperfusion.
  • The signal is clinically important even though causality is not proven.
  • Decisions still need to respect airway safety and procedure control in individual patients.

What would change my mind

  • A randomized comparison of conscious sedation versus general anesthesia in a modern thrombectomy population showing no meaningful difference in outcome.
  • Prospective data proving that the observed association disappears after fully adjusting for stroke severity and airway risk.

Critical appraisal

How strong is the paper?

Methods critique

Risk of bias

Sedation exposure was not randomized, so the analysis is vulnerable to confounding by stroke severity, airway risk, and operator preference.

Confounding

Patients with higher baseline NIHSS were more likely to receive deeper sedation, and trends toward ICA occlusion and longer procedure duration also favored heavier sedation groups.

Missing data

Six of 81 eligible patients were excluded because sedation data were unavailable before or after angiography, and the paper does not detail medication timing or duration for included patients.

Multiplicity

The analysis examined several clinical and angiographic outcomes without a prespecified adjustment for multiple testing.

Notes

  • The authors explicitly state they cannot determine whether sedation causes poor outcome or simply marks sicker patients.
  • Complication analyses were small and underpowered for rare procedural harms.

Stats check

NNT

N/A

Effect sizes

  • Mild or no sedation was independently associated with good functional outcome (OR 5.7, 95% CI 1.8-17.8).
  • Heavy sedation or pharmacologic paralysis independently predicted death (OR 5.0, 95% CI 1.3-18.7).
  • Mild or no sedation independently predicted successful reperfusion (OR 3.9, 95% CI 1.1-13.9).

Absolute effects

  • Good outcome occurred in 30 of 49 lower-sedation patients (61.2%) versus 6 of 26 heavily sedated or paralyzed patients (23.1%).
  • Death occurred in 4 of 49 lower-sedation patients (8.2%) versus 8 of 26 heavily sedated or paralyzed patients (30.8%).
  • Successful reperfusion occurred in 24 of 33 lower-sedation patients (72.7%) versus 7 of 20 heavily sedated or paralyzed patients (35.0%).

Concerns

  • The cohort was small, so the confidence intervals are wide.
  • Sedation probably captured both treatment choice and underlying clinical instability.
  • Medication dose, route, and exact timing were not recorded in a way that supports causal inference.

External validity

Who it applies to

Teams performing endovascular therapy for acute ischemic stroke where both lighter and deeper procedural sedation strategies are in routine use.

Who it does not

Patients who clearly require airway control, profound agitation management, or anesthesia for reasons outside routine stroke workflow.

Generalizability notes

  • The analysis came from an older IMS II-era workflow, so devices and reperfusion standards differ from current thrombectomy practice.
  • It remains relevant as a warning about defaulting to deep sedation without a clear indication.
  • The paper focuses on anterior-circulation patients in a trial setting.

Evidence trace

Source trace and metadata

Citations (3)

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methods_critique.confounding

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p. 3

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stats_check.effect_sizes

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p. 3

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practice_impact.bottom_line

locator

p. 4

quote

the use of sedation was a more potent marker for poor outcome and death than the initial NIHSS score

Metadata

Generated at

2026-03-08T04:15:00Z

Version

manual-pdf-repair-v1