{
  "abstract": "Introduction/Purpose Transradial access (TRA) is increasingly adopted in neuroendovascular procedures due to improved safety and patient comfort compared with transfemoral access (TFA). The Radial Intermediate Support Technique (RIST) catheter was developed to enhance support, trackability, and stability during TRA. We evaluated the performance of the RIST catheter through a single-center experience and systematic review with meta-analysis.Materials and Methods We performed a retrospective cohort study of consecutive adult patients undergoing TRA neuroendovascular procedures using the RIST catheter at a tertiary care center. The primary outcome was procedural success. Secondary outcomes included access-related complications, need for guide catheter exchange, and conversion to transfemoral access. A systematic review and meta-analysis of studies published through February 2026 was conducted using PubMed, Scopus, Web of Science, and Embase in accordance with PRISMA guidelines.Results Forty-one patients were included (median age 60 years [IQR 53-69]; 71% female). Intracranial aneurysm was the most common indication (49%). Procedures included coil embolization (24%), Woven EndoBridge embolization (22%), and flow diversion (15%). Median procedure duration was 94 minutes (IQR 74-117), and median fluoroscopy time was 21 minutes (IQR 15-28). Procedural success was achieved in 93% of cases. Access-related complications occurred in 4.8%, including one case requiring guide catheter exchange (2.4%) and one requiring conversion to transfemoral access (2.4%). Procedural complications occurred in 7.3% of cases. Meta-analysis of seven studies demonstrated a pooled procedural success rate of 95.5% (95% CI 91.1-98.6), access-related complication rate of 1.2% (95% CI 0.17-2.72), guide catheter exchange rate of 2.4% (95% CI 0.85-4.43), and crossover to transfemoral access of 3.7% (95% CI 1.44-6.77).Conclusion Use of the RIST catheter for transradial neuroendovascular procedures is associated with high technical success and low complication rates, supporting its role as a reliable platform for complex neuroendovascular interventions.Disclosures H. BaniHani: None. A. Hamouda: None. S. Ghozy: None. C. Bilgin: None. R. Kadrivel: None. L. Rinaldo: None. W. Brinjikji: None. D. Kallmes: None.Abstract E-303 Figure 1Abstract E-303 Figure 2",
  "authors": [
    {
      "affiliations": [
        "Neurosurgery, Mayo Clinic, Rochester, MN"
      ],
      "name": "H BaniHani"
    },
    {
      "affiliations": [
        "Neurosurgery, Mayo Clinic, Rochester, MN"
      ],
      "name": "A Hamouda"
    },
    {
      "affiliations": [
        "Radiology, Mayo Clinic, Rochester, MN"
      ],
      "name": "S Ghozy"
    },
    {
      "affiliations": [
        "Radiology, Mayo Clinic, Rochester, MN"
      ],
      "name": "C Bilgin"
    },
    {
      "affiliations": [
        "Radiology, Mayo Clinic, Rochester, MN"
      ],
      "name": "R Kadrivel"
    },
    {
      "affiliations": [
        "Neurosurgery, Mayo Clinic, Rochester, MN"
      ],
      "name": "L Rinaldo"
    },
    {
      "affiliations": [
        "Radiology, Mayo Clinic, Rochester, MN"
      ],
      "name": "W Brinjikji"
    },
    {
      "affiliations": [
        "Radiology, Mayo Clinic, Rochester, MN"
      ],
      "name": "D Kallmes"
    }
  ],
  "title": "E-303 Performance of the RIST catheter in transradial neuroendovascular procedures: a single-center experience and meta-analysis",
  "uid": "2a1176f1-018d-5f03-bf2f-5ddeb49a75f0"
}