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【1074】颅内血肿.ppt

  • 2026-06-25 18:22:02
【1074】颅内血肿.ppt

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PPT总页数:27页
先看看我写的学习笔记,PPT往下翻。

一、总体概述

1.1 疾病基本特点

  • 颅内血肿是颅脑损伤最常见、最严重的继发性病变。
  • 发病率:占闭合性颅脑损伤约 10%,占重型颅脑损伤 40%~50%。
  • 危害:血肿会引发周边脑水肿,造成颅内压进行性升高,极易诱发脑疝,威胁患者生命。

1.2 临床分型

  • 按症状出现时间划分
    • 急性血肿:受伤后 3 日内出现相关症状。
    • 亚急性血肿:受伤后 3 日~3 周出现相关症状。
    • 慢性血肿:受伤时间超过 3 周才出现相关症状。
  • 按血肿部位划分:分为硬脑膜外血肿、硬脑膜下血肿、脑内血肿。

二、硬脑膜外血肿

2.1 基本概况

  • 占外伤性颅内血肿的 30%,临床以急性血肿最为多见,各年龄段均可发病。

2.2 发生机制

  • 主要出血来源:以颞骨骨折撕裂脑膜中动脉最为常见。
  • 其他出血来源:颅内静脉窦、脑膜中静脉、板障静脉、导血管损伤。
  • 特殊情况:无颅骨骨折时,外力牵拉造成硬脑膜与颅骨分离,撕裂表面小血管也可形成血肿。

2.3 好发部位

  • 整体多见于颞部、额顶部、颞顶部。
  • 脑膜中动脉主干损伤:血肿多位于额颞部,可向额部、顶部蔓延。
  • 脑膜中动脉前支损伤:血肿集中在额颞部。
  • 脑膜中动脉后支损伤:血肿集中在颞顶部。
  • 上矢状窦破裂:血肿可出现在单侧或双侧大脑半球。
  • 横窦破裂:血肿多见于颅后窝,也可跨越枕部与颅后窝。

2.4 临床表现

  • 意识障碍:为本病核心表现,分为三种演变形式。原发损伤较轻者,可表现为清醒逐渐转为昏迷,或出现典型中间清醒期;原发脑损伤严重者,伤后持续昏迷且不断加深。
  • 颅内压增高:多在昏迷前、中间清醒期出现,典型症状为头痛、恶心、呕吐,伴随血压升高、脉搏减慢、呼吸减慢。
  • 瞳孔改变:多继发小脑幕切迹疝。早期患侧瞳孔短暂缩小,进展后患侧瞳孔散大,晚期双侧瞳孔散大;颅后窝血肿瞳孔改变出现较晚,呼吸异常、骤停会更早发生。
  • 神经系统体征:伤后即刻出现的局灶体征多为原发性脑损伤导致;单纯硬膜外血肿早期一般无局灶症状,合并脑疝时可出现对侧锥体束征、去脑强直。

2.5 诊断

  • 临床诊断:存在明确头部外伤史,出现特征性意识变化,查体发现骨折线跨越血管沟可初步判断。
  • 影像学检查:首选头颅 CT,典型影像为颅骨内板与硬脑膜之间双凸镜形、弓形高密度影,同时可评估脑室、中线结构及合并损伤,病情变化时需及时复查。

2.6 治疗方案

  • 手术适应证:存在明显颅内压增高症状体征;CT 提示脑组织受压;幕上血肿>30ml、颞区血肿>20ml、幕下血肿>10ml;血肿压迫大静脉窦并引发颅内压增高。
  • 手术方式:常规行骨瓣或骨窗开颅,清除血肿并彻底止血;术中硬脑膜张力偏高或可疑合并其他血肿,需切开探查。病情危重未完善 CT 者,可在瞳孔散大侧、骨折线处先行钻孔,再扩大骨窗处理。
  • 非手术治疗:适用于意识清楚、病情平稳者;CT 提示幕上血肿<30ml、幕下血肿<10ml,中线结构移位<1.0cm;治疗期间全程严密监测,动态复查影像。

三、硬脑膜下血肿

3.1 基本概况

  • 占外伤性颅内血肿约 40%,急性、亚急性类型临床多见,慢性血肿具备独立临床特点。

3.2 发生机制

  • 急性、亚急性血肿:多由额极、颞极对冲性脑挫裂伤造成脑皮质血管破裂所致;桥静脉、静脉窦撕裂也可引发大范围血肿,可不伴随脑挫裂伤。
  • 慢性血肿:好发于老年人,多存在轻微头部外伤史,部分无明确外伤;长期服用抗凝药物、营养不良、血管病变等为常见诱因,血肿可形成厚薄不均的包膜。

3.3 临床表现

  • 急性、亚急性血肿:多表现为持续性昏迷且进行性加重,亚急性患者可出现中间清醒期;伴随明显颅内压增高,病情进展快,易发生脑疝,早期可见同侧瞳孔散大;伤后即刻出现的偏瘫等体征多为原发脑损伤,后期新发体征提示血肿压迫或脑疝。
  • 慢性血肿:病程可达数月,进展缓慢。精神智力型表现为头晕、记忆力减退、反应迟钝、精神异常,易误诊为老年痴呆、精神疾病;局灶病灶型出现偏瘫、失语、癫痫,易误诊为颅内肿瘤;隐匿型无明显颅内压增高与神经体征。

3.4 诊断

  • 急性、亚急性血肿:结合头部外伤史、进行性意识障碍、颅内压增高表现判断;CT 可见颅骨与脑表面之间新月形高密度、混杂密度影,常合并脑挫裂伤。
  • 慢性血肿:老年人存在轻微外伤史,出现精神、智力、神经功能异常需高度警惕;CT 显示颅骨与脑表面间新月形低密度或等密度影,MRI 可见特征性新月形短 T₁、长 T₂信号。

3.5 治疗方案

  • 急性、亚急性血肿:整体治疗原则同硬脑膜外血肿。血肿可出现在受力部位或对冲部位;危重患者未做 CT 时,需在受力区、额极、颞极、脑底部等对冲区域多处钻孔探查;术后加强脑挫裂伤相关综合治疗。
  • 慢性血肿:有明显症状均建议手术。首选钻孔置管引流术,血肿偏小采用单孔引流,体积较大选择双孔引流;术后存在复发风险,需要定期复查 CT 或 MRI。

四、脑内血肿

4.1 基本概况

  • 发病率偏低,在闭合性颅脑损伤中占 0.5%~1.0%。
  • 好发特点:多为枕部受力引发额、颞叶对冲性损伤所致,少数出现在头部受力点处。

4.2 发生机制

  • 浅部血肿:脑皮质挫裂、血管破裂形成,常合并硬脑膜下血肿,多见于额极、颞极及脑底面。
  • 深部血肿:脑深部血管破裂引发,脑组织表面可仅见轻度挫裂伤。

4.3 临床表现与诊断

  • 临床表现:症状与合并脑挫裂伤的硬脑膜下血肿相近。
  • 影像学检查:CT 为主要诊断手段,典型表现为脑挫裂伤周边或脑深部出现类圆形、不规则高密度影,可明确血肿位置与大小。

4.4 治疗方案

  • 整体治疗原则参照硬脑膜下血肿。
  • 手术治疗:行骨瓣或骨窗开颅,同步清除脑内血肿、硬膜下血肿以及失活的脑组织。
  • 保守治疗:脑深部小型血肿、无明显颅内压增高者,可留置颅内压监测装置,严密监护病情变化。

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  1. CONNECT:[ UseTime:0.000650s ] mysql:host=127.0.0.1;port=3306;dbname=h_sjds;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000759s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.002408s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000301s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000517s ]
  6. SELECT * FROM `set` [ RunTime:0.000220s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000592s ]
  8. SELECT * FROM `article` WHERE `id` = 534015 LIMIT 1 [ RunTime:0.000445s ]
  9. UPDATE `article` SET `lasttime` = 1782418622 WHERE `id` = 534015 [ RunTime:0.014770s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.016692s ]
  11. SELECT * FROM `article` WHERE `id` < 534015 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.004019s ]
  12. SELECT * FROM `article` WHERE `id` > 534015 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000457s ]
  13. SELECT * FROM `article` WHERE `id` < 534015 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.005018s ]
  14. SELECT * FROM `article` WHERE `id` < 534015 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.005533s ]
  15. SELECT * FROM `article` WHERE `id` < 534015 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000866s ]
0.123357s