Bloodletting for Acute Stroke Recovery: A Systematic Review and Meta-Analysis

Bloodletting is a non-pharmacological treatment commonly used for acute stroke in traditional East Asian medicine. This study evaluated the efficacy and safety of bloodletting in acute stroke recovery.

We conducted a comprehensive search of eight electronic databases up to 4 June 2024 to identify relevant randomized controlled trials (RCTs). Review Manager 5.4 was used for the meta-analysis, with methodological quality assessed using the Cochrane Risk of Bias 2 tool and the GRADE approach.

Seventeen RCTs were included in this meta-analysis. The bloodletting group showed statistically significant improvements in neurological deficits compared to the non-bloodletting group, as measured using the National Institutes of Health Stroke Scale (mean difference [MD]: -2.08, 95% confidence interval [CI]: -3.13 to -1.02) and the treatment effective rate (risk ratio: 1.17, 95% CI: 1.11 to 1.22). Motor function also improved significantly in both upper (Fugl-Meyer Assessment, MD: 12.20, 95% CI: 9.67 to 14.73) and lower extremities (MD: 3.86, 95% CI: 2.16 to 5.56). The effect on daily living activities was not significant overall, but benefits were observed in patients treated within three days of stroke onset (Barthel Index, standardized MD: 0.85, 95% CI: 0.01 to 1.69). No significant differences in the frequency of adverse events were observed between the groups.

Bloodletting may be an effective and safe adjunctive therapy for patients with acute stroke receiving conventional Western medical treatment. However, further research is necessary because of the small sample sizes and low quality of the included studies.