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Preoperative Embolization for Highly Vascular Brain Tumors

2026年9月11日 更新者:Sara Bakhet Abd Elrassol Saleh、Assiut University

Preoperative Embolization for Highly Vascularised Intracranial Tumors

Highly vascular brain tumors, including meningiomas, hemangioblastomas, and certain metastases, have a rich blood supply that can lead to substantial blood loss and technical difficulties during surgical removal. Preoperative endovascular embolization is an adjunctive, catheter-based procedure used to block the feeding blood vessels of the tumor before surgery, aiming to reduce intraoperative bleeding and facilitate safer tumor resection.

The primary purpose of this study is to evaluate the technical feasibility, safety, and effectiveness of preoperative endovascular embolization in patients with highly vascular intracranial tumors.

Participants enrolled in this prospective study will undergo:

  1. Pre-procedural neurological and diagnostic cross-sectional imaging (contrast-enhanced MRI or CT angiography).
  2. Diagnostic digital subtraction angiography (DSA) to map tumor-feeding arteries, followed by super-selective catheterization to deliver embolic materials (polyvinyl alcohol particles, Onyx, or microcoils).
  3. Microsurgical tumor resection within 24 to 72 hours following the embolization procedure.

Researchers will assess the degree of tumor devascularization achieved, the volume of intraoperative blood loss, blood transfusion requirements, total surgical duration, extent of tumor resection, and the occurrence of any procedure-related complications.

研究概览

研究类型

介入性

注册 (估计的)

55

阶段

  • 不适用

参与标准

研究人员寻找符合特定描述的人,称为资格标准。这些标准的一些例子是一个人的一般健康状况或先前的治疗。

资格标准

适合学习的年龄

  • 成人
  • 年长者

接受健康志愿者

不

描述

Inclusion Criteria:

  • Diagnosis of a hypervascular brain tumor (e.g., meningioma, hemangioblastoma, or hypervascular metastasis) confirmed by contrast-enhanced MRI or CT
  • Scheduled for preoperative endovascular embolization followed by microsurgical resection

Exclusion Criteria:

  • Severe, uncorrected coagulopathy
  • Severe allergy to iodinated contrast media
  • Severe renal insufficiency (estimated glomerular filtration rate [eGFR] < 30 mL/min/1.73 m²)
  • Absence of safe arterial access
  • Absence of identifiable tumor-feeding vessels suitable for selective microcatheterization

学习计划

本节提供研究计划的详细信息,包括研究的设计方式和研究的衡量标准。

研究是如何设计的?

设计细节

  • 主要用途:治疗
  • 分配:不适用
  • 介入模型:单组作业
  • 屏蔽:无(打开标签)

武器和干预

参与者组/臂
干预/治疗
实验性的:Preoperative Embolization and Surgical Resection
Participants undergo pre-procedural neurological and imaging assessment, followed by diagnostic digital subtraction angiography (DSA) to identify tumor-feeding vessels. Super-selective microcatheterization is performed to deliver embolic agents (polyvinyl alcohol [PVA] particles, Onyx, or microcoils) for tumor devascularization. Post-embolization devascularization is evaluated by repeat DSA/CT, followed by microsurgical tumor resection within 24 to 72 hours.
Diagnostic cerebral digital subtraction angiography (DSA) is performed to identify tumor-feeding arteries and exclude dangerous anastomoses. Super-selective microcatheterization is then conducted to deliver embolic materials (polyvinyl alcohol [PVA] particles, Onyx, or microcoils) directly into the tumor vasculature. Tumor devascularization is quantified via post-procedural DSA/CT (<50%, 50-80%, or >80%). Following endovascular devascularization, patients undergo microsurgical tumor resection within 24 to 72 hours.

研究衡量的是什么?

主要结果指标

结果测量
措施说明
大体时间
Number of Participants Achieving Defined Grades of Tumor Devascularization
大体时间:24 hours post-embolization
Tumor devascularization is determined by comparing post-embolization digital subtraction angiography (DSA) or CT angiography against baseline diagnostic imaging. Participants are categorized into three predefined grades based on devascularization of tumor vascular blush: poor (<50%), moderate (50% to 80%), or good/complete (>80%).
24 hours post-embolization

合作者和调查者

在这里您可以找到参与这项研究的人员和组织。

研究记录日期

这些日期跟踪向 ClinicalTrials.gov 提交研究记录和摘要结果的进度。研究记录和报告的结果由国家医学图书馆 (NLM) 审查,以确保它们在发布到公共网站之前符合特定的质量控制标准。

研究主要日期

学习开始 (估计的)

2026年10月1日

初级完成 (估计的)

2027年10月1日

研究完成 (估计的)

2027年11月1日

研究注册日期

首次提交

2026年9月11日

首先提交符合 QC 标准的

2026年9月11日

首次发布 (实际的)

2026年9月17日

研究记录更新

最后更新发布 (实际的)

2026年9月17日

上次提交的符合 QC 标准的更新

2026年9月11日

最后验证

2026年9月1日

更多信息

此信息直接从 clinicaltrials.gov 网站检索,没有任何更改。如果您有任何更改、删除或更新研究详细信息的请求,请联系 register@clinicaltrials.gov. clinicaltrials.gov 上实施更改,我们的网站上也会自动更新.

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