Stop-Short Technique Doubles Carotid Dissection Risk During TCAR

Mitigating Technical Complications in Transcarotid Revascularization

Transcarotid artery revascularization has become a standard clinical alternative to carotid endarterectomy and transfemoral carotid artery stenting for patients at high surgical risk [1, 2]. By utilizing direct carotid access and dynamic flow reversal (a neuroprotective method that temporarily reverses blood flow to divert embolic debris away from the brain), this approach minimizes the embolic risks associated with navigating the aortic arch [3]. Despite these advantages, the procedure introduces specific technical challenges, including the risk of intraoperative common carotid artery dissection during arterial access or sheath insertion [4]. These vascular injuries are clinically significant because they frequently necessitate emergency surgical conversion or complex endovascular rescue and are associated with longer procedure times and increased contrast use [5, 4]. A recent registry analysis now offers precise data on the procedural techniques and patient characteristics that contribute to these intraoperative complications, providing vascular surgeons with actionable strategies to improve safety.

Registry Analysis of Real-World TCAR Outcomes

The researchers conducted a retrospective analysis using the Silk Road Medical registry, a manufacturer-maintained database tracking procedural outcomes. The study evaluated a contemporary cohort of 25,346 patients who underwent transcarotid artery revascularization between January 2023 and January 2024. The study population had a median age of 74 years, and 61.9% of the patients were male. By utilizing this large-scale registry, the authors provided a high-resolution view of procedural complications in a real-world clinical setting. Nearly a decade after the U.S. Food and Drug Administration approved the procedure in 2015, it continues to demonstrate a favorable safety profile. The analysis found that only 300 patients (1.18%) experienced an intraoperative common carotid artery dissection (an intimal tear in the vessel wall that creates a false lumen and can compromise cerebral perfusion). This low incidence confirms that the technique remains a highly stable intervention for carotid stenosis, though the sheer volume of procedures performed annually means clinicians must still be prepared to manage this specific complication.

Identifying High-Risk Procedural Phases and Patient Factors

The researchers identified specific procedural phases where the risk of arterial injury is most acute, providing clinicians with a roadmap for heightened intraoperative vigilance. Among the 300 cases of common carotid artery dissection, the vast majority occurred during the insertion of the arterial sheath, accounting for 61.7% of all dissection events. This critical step requires precise navigation to avoid intimal damage in often calcified or tortuous vessels. Other vulnerable moments included micropuncture access, which was the primary cause in 21.7% of cases, and guidewire manipulation, which led to dissection in 12.0% of the cohort. Beyond procedural mechanics, the study utilized multivariable logistic regression (a statistical method that isolates the independent effect of specific risk factors while controlling for confounding variables) to identify patient characteristics linked to arterial injury. The analysis revealed that female sex was independently associated with an increased risk of common carotid artery dissection, showing an adjusted odds ratio of 1.65 (95% CI, 1.31 to 2.07). Advanced age also emerged as a significant predictor. Patients aged 85 years or older faced a substantially higher risk compared to those under 65 years, demonstrating an adjusted odds ratio of 1.82 (95% CI, 1.17 to 3.02). For practicing surgeons, these demographic factors should directly inform preoperative risk assessments, prompting extra caution during access in older or female patients who may have smaller or more fragile arteries.

The Impact of Guidewire Positioning on Arterial Integrity

The technical execution of sheath placement is a primary determinant of arterial safety during transcarotid artery revascularization. A critical factor identified in the registry analysis is the use of the stop-short technique (the practice of maintaining the stiff guidewire within the common carotid artery during sheath insertion instead of advancing it distally into the external carotid artery). While some clinicians utilize this approach to avoid navigating a tortuous or diseased external carotid artery, the data indicate it creates significant mechanical vulnerability. By failing to anchor the guidewire distally, the sheath lacks the necessary trackability, which can lead to increased lateral force against the vessel wall and subsequent intimal tearing. The statistical impact of this technical choice is substantial. The researchers found that the use of the stop-short technique was associated with a more than twofold increase in the risk of common carotid artery dissection, yielding an adjusted odds ratio of 2.25 (95% CI, 1.70 to 3.02). This finding provides a clear, actionable target for procedural refinement. To minimize the risk of intraoperative arterial injury, the study authors recommend that surgeons engage the external carotid artery during sheath insertion whenever possible. This maneuver provides a more stable rail for the sheath, ensuring it remains coaxial within the common carotid artery and reducing the likelihood of mechanical trauma.

Clinical Consequences and Management of Intraoperative Dissection

When a common carotid artery dissection occurs, the clinical stakes for the patient increase immediately. Among the 300 patients who experienced this complication in the registry, acute stroke events occurred in 2.3% (7 of 300) of cases. While the overall incidence of dissection remains low, these neurological events represent a severe deviation from the intended safety profile of the procedure. Beyond the immediate risk of cerebral ischemia, the occurrence of a dissection necessitates a more complex and resource-intensive operation that extends well beyond the standard workflow. The study found that patients with common carotid artery dissection faced a significantly higher procedural burden across all measured metrics compared to those without the complication. Specifically, these cases required significantly longer procedure times (P < 0.001) and resulted in greater fluoroscopy exposure (P < 0.001) for both the patient and the surgical team. Furthermore, the management of the arterial injury required higher contrast use (P < 0.001) and the more frequent use of two or more stents (P < 0.001) to stabilize the vessel flap, adding to the total physiological stress and complexity of the intervention. Surgeons employed several rescue strategies to manage these intraoperative dissections, ranging from endovascular techniques to open surgical conversion. The most frequent management strategy was additional stent deployment, utilized in 41.0% of cases. However, endovascular repair was not always sufficient to resolve the injury. The researchers noted that 22.0% of dissections required conversion to carotid endarterectomy, while 6.7% of cases necessitated other forms of open surgical repair. These findings underscore that while transcarotid revascularization is designed as a minimally invasive option, the management of its primary intraoperative complication often requires the full range of vascular surgical skills, reinforcing the need for these procedures to be performed by teams capable of immediate open conversion.

References

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2. Naazie IN, Cui CL, Osaghae I, Murad MH, Schermerhorn M, Malas MB. A Systematic Review and Meta-Analysis of Transcarotid Artery Revascularization with Dynamic Flow Reversal Versus Transfemoral Carotid Artery Stenting and Carotid Endarterectomy.. Annals of vascular surgery. 2020. doi:10.1016/j.avsg.2020.05.070

3. Transcarotid Artery Revascularization vs Carotid Artery Stenting: Systematic Review with ☸️SAIMSARA. 2025. doi:10.62487/saimsara1247267

4. Wu YHA, Aru RG, Mulugeta S, et al. Utilization of the Stop-Short Technique in Transcarotid Artery Revascularization Is Associated with Intraoperative Common Carotid Artery Dissection.. Journal of vascular surgery. 2026. doi:10.1016/j.jvs.2026.04.023

5. Porto C, Sastry RA, Torabi R, et al. Emergent Endovascular Intervention for Acute Neurological Deficits Post-Carotid Endarterectomy: A Single-Institutional Analysis and Systematic Review of the Literature. Journal of Neuroendovascular Therapy. 2025. doi:10.5797/jnet.oa.2025-0050