💡
How to Answer This Question
-
1
Read the Context
Read the full description, category and tags to understand the real scenario.
-
2
Give an Actionable Answer
Give concrete steps, cautions and reasoning — not just a conclusion.
-
3
Cite Sources
Reference standards, papers or product manuals to make the answer more credible.
-
4
Wait for Acceptance
You will be notified if accepted. Continue the discussion in comments.
All Answers2
E
EmmaReagent
25 days ago
不同品牌阳性参考品浓度不建议直接横比。厂家靶点可能是E6/E7/L1，拷贝数定义、基质、核酸类型、提取方法、荧光通道和仪器阈值都不同，Ct只能用于同一体系趋势判断。建议用本实验室常用试剂盒建立参考窗口：同一批质控连续做20次左右，记录阳性Ct、内标Ct和阴性质控范围，设定警戒线；更换试剂盒批号、提取液或仪器参数时做平行比对。内标必须一起看，IPC Ct异常提示抑制或提取失败，而非简单阴性/阳性。小实验室优先选带稳定对照、小包装质控品和清晰说明书的方案。
S
SamExtract
24 days ago
阴性参考品偶发弱阳性，先排查气溶胶污染、阳性管开盖、移液器、管壁残留和荧光基线噪声，而不是立刻判质控失效。建议阴、阳、待测分区，使用带滤芯吸头，每次批间加空白提取和空白扩增对照。商品化质控按说明书避光冷冻保存，尽量分装小管一次性使用，反复冻融可能加重降解或造成信号异常；工作液现配，不同批号试剂切换时先做平行验证。月60例样本可每批至少包含阴、阳、内标，并记录Ct、峰形和IPC Ct趋势，出现漂移再复核提取或稀释重测。
Write an AnswerSign in to answer
Sign in required to answer (browsing is open). Sign in