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硬膜外血肿 - 版本历史
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2026-02-06T08:15:08Z
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<strong>硬膜外血肿</strong>（Epidural Hematoma, EDH）是指血液积聚在<strong>颅骨</strong>与<strong>硬脑膜</strong>（大脑最外层的保护膜）之间的潜在空间内。<br />
<br>这是一种危急的神经外科急症，绝大多数（约 85%）由头部外伤引起，导致<strong>[[Middle Meningeal Artery]]</strong>（脑膜中动脉）破裂出血。由于动脉压力高，血肿形成迅速，若不及时处理，会引起脑疝并危及生命。然而，若能及时通过开颅手术清除血肿，患者的预后通常极佳，因此被称为“可治愈的致命伤”。<br />
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<div style="font-size: 1.2em; font-weight: bold; letter-spacing: 1.2px;">EDH</div><br />
<div style="font-size: 0.7em; opacity: 0.85; margin-top: 4px; white-space: nowrap;">Epidural Hematoma (点击展开)</div><br />
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<div style="font-size: 0.8em; color: #64748b; margin-top: 12px; font-weight: 600;">典型的“凸透镜”状影像</div><br />
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<th colspan="2" style="padding: 8px 12px; background-color: #e0f2fe; color: #1e40af; text-align: left; font-size: 0.9em; border-top: 1px solid #bae6fd;">临床概况</th><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0; width: 40%;">出血来源</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #0f172a;">脑膜中动脉 (MMA)</td><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0;">好发部位</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #1e40af;">颞部 (翼点 Pterion)</td><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0;">CT 特征</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #0f172a;">双凸透镜形 (梭形)</td><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0;">典型体征</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #16a34a;">[[Lucid Interval]]</td><br />
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<th colspan="2" style="padding: 8px 12px; background-color: #e0f2fe; color: #1e40af; text-align: left; font-size: 0.9em; border-top: 1px solid #bae6fd;">治疗策略</th><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0;">手术指征</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #1e40af;">血肿量 > 30ml</td><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0;">首选术式</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #0f172a;">开颅血肿清除术</td><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569;">ICD-10</th><br />
<td style="padding: 6px 12px; color: #0f172a;">S06.4</td><br />
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<h2 style="background: #f1f5f9; color: #0f172a; padding: 10px 18px; border-radius: 0 6px 6px 0; font-size: 1.25em; margin-top: 40px; border-left: 6px solid #0f172a; font-weight: bold;">病理机制：解剖学的弱点</h2><br />
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EDH 的发生具有高度的解剖学特异性。其核心在于颅骨最薄弱的区域——<strong>翼点 (Pterion)</strong>。<br />
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<li style="margin-bottom: 12px;"><strong>骨折撕裂：</strong> 颞骨受到撞击发生线性骨折。</li><br />
<li style="margin-bottom: 12px;"><strong>血管损伤：</strong> 骨折线跨越并撕裂了紧贴颅骨内面行走的<strong>脑膜中动脉 (Middle Meningeal Artery, MMA)</strong>。</li><br />
<li style="margin-bottom: 0;"><strong>血肿剥离：</strong> 高压的动脉血将硬脑膜从颅骨内板上强行剥离。由于硬脑膜在颅缝处与骨结合紧密，血肿无法跨越颅缝，因此在 CT 上呈现出典型的<strong>局限性双凸透镜状 (Biconvex/Lens-shaped)</strong>。</li><br />
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<h2 style="background: #f1f5f9; color: #0f172a; padding: 10px 18px; border-radius: 0 6px 6px 0; font-size: 1.25em; margin-top: 40px; border-left: 6px solid #0f172a; font-weight: bold;">典型病程：中间清醒期</h2><br />
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EDH 具有神经外科最为经典的临床演变过程，识别这一过程是挽救生命的关键。<br />
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<th style="padding: 12px; border: 1px solid #cbd5e1; color: #0f172a; width: 25%;">阶段</th><br />
<th style="padding: 12px; border: 1px solid #cbd5e1; color: #1e40af; width: 75%;">临床表现与机制</th><br />
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<td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600;">1. 初始昏迷</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1;">由原发性脑震荡引起，通常时间较短。</td><br />
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<td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600; color: #b91c1c;">2. 中间清醒期<br>(Lucid Interval)</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1;">患者意识恢复，看似正常。此时原发脑震荡已恢复，而动脉出血导致的血肿尚未达到引起脑疝的临界体积。<strong>这是极具欺骗性的“假愈”阶段。</strong></td><br />
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<td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600;">3. 再次昏迷</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1;">血肿体积增大，ICP 急剧升高，压迫脑干，导致<strong>钩回疝 (Uncal Herniation)</strong>。表现为瞳孔散大（压迫动眼神经）和对侧肢体瘫痪。</td><br />
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<h2 style="background: #f1f5f9; color: #0f172a; padding: 10px 18px; border-radius: 0 6px 6px 0; font-size: 1.25em; margin-top: 40px; border-left: 6px solid #0f172a; font-weight: bold;">治疗策略：时间就是生命</h2><br />
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治疗决策严格遵循《重型颅脑创伤管理指南》。<br />
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<li style="margin-bottom: 12px;"><strong>手术治疗 (Craniotomy)：</strong> 金标准。适用于血肿体积 > 30 cm³，或中线移位 > 5 mm，或 GCS 评分下降的患者。手术旨在清除血肿并止血（电凝 MMA）。</li><br />
<li style="margin-bottom: 12px;"><strong>保守治疗：</strong> 仅适用于血肿极小、无占位效应、神经功能完整且能进行严密神经重症监护的患者。必须频繁复查 CT。</li><br />
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<span style="color: #0f172a; font-weight: bold; font-size: 1.05em; display: inline-block; margin-bottom: 15px;">关键相关概念 [Key Concepts]</span><br />
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<strong>1. [[Middle Meningeal Artery]] (MMA, 脑膜中动脉)：</strong> 起源于上颌动脉，经棘孔入颅。它是 EDH 出血的主要罪魁祸首，紧贴颞骨鳞部内面，极易受损。<br />
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<strong>2. Biconvex Shape (双凸透镜/梭形)：</strong> EDH 在 CT 上的特征性影像。由于硬脑膜在颅骨缝（Sutures）处附着紧密，限制了血肿的扩散范围，使其向内推挤脑组织形成凸透镜状。<br />
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<strong>3. Uncal Herniation (钩回疝)：</strong> EDH 最常见的致死机制。颞叶钩回被推挤入脚间池，压迫中脑和动眼神经，导致同侧瞳孔散大、对侧偏瘫（Kernohan's Notch 现象可能导致同侧偏瘫，需鉴别）。<br />
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<span style="color: #0f172a; font-weight: bold; font-size: 1.05em; display: inline-block; margin-bottom: 15px;">学术参考文献 [Academic Review]</span><br />
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[1] <strong>Bullock MR, et al. (2006).</strong> <em>Surgical management of acute epidural hematomas.</em> <strong>[[Neurosurgery]]</strong>. <br><br />
<span style="color: #475569;">[点评]：神经外科领域的权威指南，明确界定了 EDH 的手术指征（如血肿体积 >30ml），是目前临床决策的金标准。</span><br />
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[2] <strong>Maugeri R, et al. (2015).</strong> <em>Conservative vs. surgical management of post-traumatic epidural hematoma: a case series and review of the literature.</em> <strong>[[Am J Emerg Med]]</strong>. <br><br />
<span style="color: #475569;">[点评]：探讨了保守治疗的可行性与风险，强调了影像学随访的重要性。</span><br />
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[3] <strong>Rosenthal AA, et al. (2017).</strong> <em>Prognosis of Epidural Hematoma Outcome.</em> <strong>[[Journal of Trauma]]</strong>. <br><br />
<span style="color: #475569;">[点评]：大样本回顾性研究，再次证实了 EDH 若在出现双侧瞳孔散大前手术，死亡率极低；时间延迟是主要致死因素。</span><br />
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神经外科学 · 知识图谱<br />
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<td style="width: 85px; background-color: #f8fafc; color: #334155; font-weight: 600; padding: 10px 12px; text-align: right; vertical-align: middle;">上级分类</td><br />
<td style="padding: 10px 15px; color: #334155;">[[颅脑创伤]] (TBI) • [[颅内出血]]</td><br />
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<td style="width: 85px; background-color: #f8fafc; color: #334155; font-weight: 600; padding: 10px 12px; text-align: right; vertical-align: middle;">鉴别诊断</td><br />
<td style="padding: 10px 15px; color: #334155;">[[硬膜下血肿]] (新月形) • [[脑挫裂伤]]</td><br />
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<td style="width: 85px; background-color: #f8fafc; color: #334155; font-weight: 600; padding: 10px 12px; text-align: right; vertical-align: middle;">核心解剖</td><br />
<td style="padding: 10px 15px; color: #334155;">[[翼点]] (Pterion) • [[棘孔]] • [[脑膜中动脉]]</td><br />
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