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TRALI - 版本历史
2026-04-18T06:57:39Z
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2026-02-07T10:54:37Z
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<strong>TRALI</strong>（Transfusion-Related Acute Lung Injury，<strong>输血相关急性肺损伤</strong>）是指输血期间或输血后 <strong>6 小时内</strong>新发的、以急性低氧血症和双侧肺浸润为特征的临床综合征，且不能用循环超负荷（心衰）来解释。<br />
<br>它是<strong>非心源性肺水肿</strong>的一种形式，也是导致<strong>输血相关死亡</strong>的首要原因（约占 30%）。<br />
<br>其核心发病机制主要归因于供者血液中的<strong>抗白细胞抗体</strong>（Anti-HLA 或 Anti-HNA）激活受者肺微血管内的中性粒细胞，导致内皮损伤和毛细血管渗漏（免疫性 TRALI）。目前全球推行的<strong>“全男性血浆”</strong>策略已显著降低了其发生率。<br />
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<div style="font-size: 1.2em; font-weight: bold; letter-spacing: 1.2px;">TRALI</div><br />
<div style="font-size: 0.7em; opacity: 0.85; margin-top: 4px; white-space: nowrap;">Transfusion-Related Acute Lung Injury (点击展开)</div><br />
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<div style="font-size: 0.8em; color: #64748b; margin-top: 12px; font-weight: 600;">输血致死的头号杀手</div><br />
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<table style="width: 100%; border-spacing: 0; border-collapse: collapse; font-size: 0.85em;"><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;">诊断标准 (CCC 2019)</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%;">发作窗口</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #e11d48;">输血中 或 < 6h</td><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0;">低氧血症</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #0f172a;">PaO2/FiO2 ≤ 300 mmHg</td><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0;">影像学</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #0f172a;">双侧肺浸润 (白肺)</td><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0;">排除项</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #1e40af;">无左心房高压 (BNP正常)</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;">风险因素</th><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0;">高危血制品</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #e11d48;">血浆, 机采血小板</td><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0;">供者因素</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #0f172a;">经产妇 (抗HLA抗体阳性)</td><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569; border-bottom: 1px solid #e2e8f0;">受者因素</th><br />
<td style="padding: 6px 12px; border-bottom: 1px solid #e2e8f0; color: #0f172a;">脓毒症, 机械通气, 吸烟</td><br />
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<th style="text-align: left; padding: 6px 12px; background-color: #f8fafc; color: #475569;">治疗原则</th><br />
<td style="padding: 10px 12px; color: #1e40af;">支持治疗 (避免利尿)</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;">肺损伤机制：二次打击 (Two-Hit Model)</h2><br />
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目前公认的 TRALI 发病机制是<strong>“中性粒细胞激活”</strong>学说，该过程通常分为两个阶段。<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: 35%;">触发因素</th><br />
<th style="padding: 12px; border: 1px solid #cbd5e1; color: #475569; width: 40%;">病理生理改变</th><br />
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<td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600;">First Hit<br>(患者易感性)</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1;">受者原发病：<br>感染、休克、创伤、大手术</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1;"><strong>内皮活化与扣押</strong><br>肺微血管内皮细胞活化，导致中性粒细胞在肺部扣押（Sequestration）并处于“预激”状态。</td><br />
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<td style="padding: 10px; border: 1px solid #cbd5e1; font-weight: 600;">Second Hit<br>(血液触发)</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1;">输注血液：<br><strong>抗HLA/HNA 抗体</strong> (80%)<br>生物活性脂质 (20%)</td><br />
<td style="padding: 10px; border: 1px solid #cbd5e1;"><strong>大规模激活</strong><br>抗体与预激的中性粒细胞结合，导致其释放蛋白酶和 ROS，破坏毛细血管屏障，引发肺水肿。</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;">临床鉴别：TRALI vs. TACO</h2><br />
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TRALI 常被误诊为输血相关循环超负荷（TACO），但两者的病理本质（渗透性 vs 静水压）和治疗方案（补液 vs 利尿）截然不同。<br />
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<li style="margin-bottom: 12px;"><strong>TRALI (肺损伤)：</strong> <br />
<br>• <strong>低血压</strong> (常见)<br />
<br>• 发热<br />
<br>• 肺水肿液蛋白含量高 (渗出液)<br />
<br>• <strong>BNP 正常</strong><br />
<br>• 治疗：机械通气，<strong>维持血容量</strong> (利尿有害)</li><br />
<li style="margin-bottom: 0;"><strong>TACO (心衰)：</strong> <br />
<br>• <strong>高血压</strong> (常见)<br />
<br>• 颈静脉怒张<br />
<br>• 肺水肿液蛋白含量低 (漏出液)<br />
<br>• <strong>BNP 显著升高</strong> (>1.5倍)<br />
<br>• 治疗：坐位吸氧，<strong>强效利尿</strong></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. Male-Only Plasma (全男性血浆策略)：</strong> 预防 TRALI 的最有效措施。由于女性（尤其是经产妇）体内抗 HLA 抗体阳性率高，现代血站通常仅将男性供者的血浆用于临床输注，女性血浆则转用于分离白蛋白等制品。<br />
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<strong>2. Cognate Antigen (相应抗原)：</strong> 免疫性 TRALI 发生的先决条件。即受者体内必须表达与供者抗体相对应的特异性抗原（如受者为 HLA-A2 型，供者含有抗 HLA-A2 抗体）。<br />
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<strong>3. Type II TRALI (非免疫性)：</strong> 少数 TRALI 病例中未检测到抗体，而是由储存血（尤其是陈旧血小板）中积聚的<strong>生物活性脂质</strong>（如溶血磷脂酰胆碱）作为“第二次打击”引发。<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>Toy P, et al. (2005).</strong> <em>Transfusion-related acute lung injury: definition and review.</em> <strong>[[Crit Care Med]]</strong>. <br><br />
<span style="color: #475569;">[点评]：共识指南。确立了 TRALI 的标准定义，将其与 ALI/ARDS 的概念统一，排除了心源性水肿。</span><br />
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[2] <strong>Vlaar AP, et al. (2019).</strong> <em>The 2019 Definition of Transfusion-Related Acute Lung Injury.</em> <strong>[[Transfusion]]</strong>. <br><br />
<span style="color: #475569;">[点评]：最新定义。重新分类了 TRALI（Type I 和 Type II），并将部分不符合严格标准的病例归类为 ARDS，旨在提高诊断特异性。</span><br />
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[3] <strong>Silliman CC, et al. (1997).</strong> <em>Plasma from stored packed red blood cells... activates neutrophils...</em> <strong>[[Transfusion]]</strong>. <br><br />
<span style="color: #475569;">[点评]：揭示了非免疫性 TRALI 的机制。证明了陈旧血中积聚的脂质可作为中性粒细胞激活剂，提示了血制品效期管理的重要性。</span><br />
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急重症医学 · 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;">[[输血不良反应]] • 急性肺损伤 (ALI)</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;">[[TACO]] (循环负荷) • [[TAD]] (输血相关呼吸困难)</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;">预防措施</td><br />
<td style="padding: 10px 15px; color: #334155;">[[全男性血浆]] • 筛查 [[抗HLA抗体]]</td><br />
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