全血CD19+ B细胞计数
此项检查测量的是标记有CD19蛋白的B细胞数量,几乎所有成熟的B细胞都会表达这种蛋白。它有助于评估免疫功能并检测影响B细胞的疾病。
["此项检查有助于评估您的免疫系统并识别与B细胞相关的疾病。"]
关键信息一览
- LOINC
- 59143-8
- 简码
- CD19CD38
- 别名
- CD19+CD38+ Cells NFr Bld
- 类别
- 生化
- 样本
- whole-blood
- 采血管
- EDTA anticoagulant tube (lavender/purple-top, K2-EDTA or K3-EDTA). Sodium heparin (green-top) is also acceptable for flow cytometry. ACD-A (yellow-top) tubes may be used for extended stability requirements.
- 单位
- N/A
- 参考下限
- 5
- 参考上限
- 20
- 是否空腹
- 否
- 适用人群
- 成人
- 性别
- all
- 年龄范围
- 0–120 岁
- 检测方法
- Flow cytometry (immunophenotyping) using fluorescently labeled monoclonal antibodies against CD19 and CD38 surface markers, typically with CD45 gating and viability staining
- CPT
- 88184 (Flow cytometry, cell surface, cytoplasmic, or nuclear marker, technical component only); 88185 (each additional marker, per antibody); 88187-88189 (interpretation services may apply)
- SNOMED
- 1421000119104 | Measurement of CD19 and CD38 positive cells in blood by flow cytometry (procedure)
- 标本量
- Minimum 3-5 mL of whole blood for adults; 1-2 mL for pediatric patients. Smaller volumes may be acceptable with specialized microtube protocols for flow cytometry.
- 标本稳定性
- Specimen should be processed within 24-48 hours of collection when stored at room temperature (18-25°C). Refrigeration (2-8°C) may extend stability to 48-72 hours, but viability and marker expression may decline. Do not freeze whole blood specimens. Optimal results are obtained when analysis is performed within 24 hours of collection.
- 溶血上限
- 0
- 脂血上限
- 0
- 黄疸上限
- 0
- 报告时间
- 4–72 小时
- 医嘱频率
- routine
可能需要此检查的原因
如果您患有与B细胞功能异常相关的症状或疾病(如反复感染、自身免疫性疾病或某些癌症,如淋巴瘤),您的医疗保健提供者可能会建议进行此检查。此检查也可用于监测免疫相关治疗的效果。
检查前的准备
不需要特殊准备。您需要从手臂抽取少量全血样本,类似于常规血液检查。样本将被处理以计数CD19+细胞。
检查结果的含义
结果通常以绝对细胞计数(每微升血液中的CD19+细胞数量)形式报告。低于正常范围的计数可能表明免疫缺陷或B细胞疾病,而高于正常范围的计数可能表明B细胞过度活跃。
常见监测的疾病
此项检查常用于监测慢性淋巴细胞白血病(CLL)、自身免疫性疾病(如狼疮)或免疫缺陷等B细胞相关疾病。它也可帮助治疗方案的决策。
Reference range
Reference ranges vary by laboratory and patient population. CD19+CD38+ B-cell subsets are typically reported as a percentage of total lymphocytes or absolute count (cells/μL). Adult reference values for CD19+CD38+ cells generally range from 5-20% of total B lymphocytes, with absolute counts varying by age. Pediatric values differ significantly and should be interpreted using age-matched reference ranges.N/A
No special patient preparation required. Patients on immunosuppressive therapy (e.g., rituximab, corticosteroids) may show altered results and should be reported to the laboratory. Recent vaccination, infection, or stress may transiently affect lymphocyte subset distribution. Inform the laboratory of any recent blood transfusions, as they may affect results.
Clinical interpretation
How abnormal results are interpreted and what conditions they suggest.
◆Associated findings1
简称
CD19+ B细胞计数
常见问题
低CD19+ B细胞计数的含义是什么?
此检查是否需要空腹?
我应该多久进行一次此检查?
本信息仅供教育用途,不能替代专业医疗建议、诊断或治疗。
本内容仅供一般信息和教育用途,不能替代专业医疗建议、诊断或治疗。对于任何医疗问题,请务必咨询合格的医疗服务提供者;切勿因阅读本站内容而忽视专业医疗建议或推迟就医。
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医学审核:WellAlly 编辑团队 最后审核 2026年8月16日. · 阅读我们的编辑政策