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Sonolysis during carotid endarterectomy: randomised controlled trial

D. Školoudík, T. Hrbáč, M. Kovář, V. Beneš, J. Fiedler, M. Branca, JB. Rossel, D. Netuka, SONOBIRDIE Trial Investigators

. 2025 ; 388 (-) : e082750. [pub] 20250319

Language English Country England, Great Britain

Document type Journal Article, Randomized Controlled Trial, Multicenter Study, Clinical Trial, Phase III

Persistent link   https://www.medvik.cz/link/bmc25009468

OBJECTIVE: To evaluate the effectiveness and safety of sonolysis using a low intensity 2 MHz pulsed wave ultrasound beam during carotid endarterectomy. DESIGN: Multicentre, phase 3, double blind, randomised controlled trial. SETTING: 16 European centres. PARTICIPANTS: 1004 patients (mean age 68 years; 312 (31%) female) were enrolled in the study between 20 August 2015 and 14 October 2020 until the interim analysis was performed. INTERVENTIONS: Sonolysis (n=507) versus sham procedure (n=497). MAIN OUTCOME MEASURES: The primary endpoint was the composite incidence of ischaemic stroke, transient ischaemic attack, and death within 30 days. The incidence of new ischaemic lesions on follow-up brain magnetic resonance imaging was the main substudy endpoint, and incidence of intracranial bleeding was the main safety endpoint. RESULTS: The results favoured the sonolysis group for the primary endpoint (11 (2.2%) v 38 (7.6%); risk difference -5.5%, 95% confidence interval (CI) -8.3% to -2.8%; P<0.001), as well as in the substudy for magnetic resonance imaging detected new ischaemic lesions (20/236 (8.5%) v 39/224 (17.4%); risk difference -8.9%, -15% to -2.8%; P=0.004). Sensitivity analysis resulted in a risk ratio for sonolysis of 0.25 (95% CI 0.11 to 0.56) for ischaemic stroke and 0.23 (0.07 to 0.73) for transient ischaemic attack within 30 days. Sonolysis was found to be safe, and 94.4% of patients in the sonolysis group were free from serious adverse events 30 days after the procedure. CONCLUSION: Sonolysis was safe for patients undergoing carotid endarterectomy and resulted in a significant reduction in the composite incidence of ischaemic stroke, transient ischaemic attack, and death within 30 days. TRIAL REGISTRATION: Clinicaltrials.gov NCT02398734.

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$a OBJECTIVE: To evaluate the effectiveness and safety of sonolysis using a low intensity 2 MHz pulsed wave ultrasound beam during carotid endarterectomy. DESIGN: Multicentre, phase 3, double blind, randomised controlled trial. SETTING: 16 European centres. PARTICIPANTS: 1004 patients (mean age 68 years; 312 (31%) female) were enrolled in the study between 20 August 2015 and 14 October 2020 until the interim analysis was performed. INTERVENTIONS: Sonolysis (n=507) versus sham procedure (n=497). MAIN OUTCOME MEASURES: The primary endpoint was the composite incidence of ischaemic stroke, transient ischaemic attack, and death within 30 days. The incidence of new ischaemic lesions on follow-up brain magnetic resonance imaging was the main substudy endpoint, and incidence of intracranial bleeding was the main safety endpoint. RESULTS: The results favoured the sonolysis group for the primary endpoint (11 (2.2%) v 38 (7.6%); risk difference -5.5%, 95% confidence interval (CI) -8.3% to -2.8%; P<0.001), as well as in the substudy for magnetic resonance imaging detected new ischaemic lesions (20/236 (8.5%) v 39/224 (17.4%); risk difference -8.9%, -15% to -2.8%; P=0.004). Sensitivity analysis resulted in a risk ratio for sonolysis of 0.25 (95% CI 0.11 to 0.56) for ischaemic stroke and 0.23 (0.07 to 0.73) for transient ischaemic attack within 30 days. Sonolysis was found to be safe, and 94.4% of patients in the sonolysis group were free from serious adverse events 30 days after the procedure. CONCLUSION: Sonolysis was safe for patients undergoing carotid endarterectomy and resulted in a significant reduction in the composite incidence of ischaemic stroke, transient ischaemic attack, and death within 30 days. TRIAL REGISTRATION: Clinicaltrials.gov NCT02398734.
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$a Kovář, Martin $u Department of Neurology, Na Homolce Hospital, Prague, Czech Republic
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