跳值歷史背景
自1999年,Abbott AxSYMTM Troponin I項目中首次報道
False Increases of Troponin I attribute to incomplete separation of serum,Clinical Chemistry 45, No. 5, 1999
陸續在羅氏、雅培、貝克曼和西門子等產品中均有發現
BD rapid serum tubes reduce false positive plasma troponin T results on the Roche Cobas e411 analyzer,
Clinical Biochemistry 45 (2012) 842–844
Use of the BD Vacutainer Rapid Serum Tube Reduces False-Positive Results for Selected Beckman Coulter
Unicel DxI Immunoassays,Am J Clin Pathol 2011;136:325-329
Comparison of cardiac TnI outliers using a contemporary and a high-sensitivity assay on the Abbott Architect
platform,Annals of Clinical Biochemistry,2014, Vol. 51(4) 507–511
Outliers as a Cause of False Cardiac Troponin Results-Investigating the Robustness of 4 Contemporary Assays, Clinical Chemistry 57:5, 710–718 (2011)
特別是高靈敏度項目,如TnI, TSH、HIV項目
Evaluation of the performance of the Abbott ARCHITECT HIV Ag/Ab Combo Assay, Journal of Clinical
Virology 52S (2011) S51– S55
Use of the BD Vacutainer Rapid Serum Tube Reduces False-Positive Results for Selected Beckman Coulter Unicel DxI Immunoassays,Am J Clin Pathol 2011;136:325-329
跳值定義及表現形式
跳值:英文表述Irreproducible false positive,discrepancy outlier/ false positive,
initially reactive/positive
定義:為樣本及測試條件所導致的非重現性假陽或初測假陽性。測試結果表現為RLU偏
高,經過重復測試,結果趨于正常;且該現象的重現性低,與系統的精密度無關
表現形式:針對樣本管的首次測試,往往RLU偏高,見下表( 雅培,Architect 系統):
文獻來源:
Comparison of cardiac TnI outliers using a contemporary and a high-sensitivity assay on the Abbott Architect Platform,Annals of Clinical Biochemistry, 2014, Vol. 51(4) 507–511
跳值原因
在化學發光免疫檢測以及ELISA中,樣本前處理條件,如凝集時間、凝集溫度、離心轉速、離心時間等對TnI①~③ 、HBsAg④ 、HBeAg⑤ 、Anti-HBc⑥、Anti-HIV⑦ 、Anti-TP⑧ 等項目均造成假陽性結果,引起跳值。
文獻來源:
① False Increases of Troponin I attribute to incomplete separation of serum, Clinical Chemistry 45, No. 5, 1999
② 離心時間對心肌肌鈣蛋白I檢測結果的影響,檢驗醫學與臨床2010年5月第7卷第9期,833-834(貝克曼, DXI800)
③ 分析前處理因素對化學發光法cTnI檢測結果的影響分析,檢驗醫學與臨床20l0年3月第7卷第6期,534-535
④ ELISA 法檢測HBsAg(乙肝表面抗原)出現假陽性的原因分析,醫藥前沿,2013(24)
⑤ ELI SA 檢測抗- HBC 假陽性原因分析,黑龍江醫學,2002 年第6 期,
⑥ 酶免法檢測HBeAg假陽性原因分析,臨床檢驗雜志,2000(5)
⑦ 抗人類免疫缺陷病毒抗體酶聯免疫吸附法檢測條件的優化,國際檢驗醫學雜志2012年3月第33卷第5期
⑧ 酶聯免疫試驗法檢測梅毒的影響因素及結果分析,世界最新醫學信息文摘 2013 年3 月第13 卷第9期
跳值原因(Abbott,BCI)

跳值產生示意圖
不同廠家跳值概率(TnI項目)
① Outliers as a Cause of False Cardiac Troponin Results: Investigating the Robustness of 4 Contemporary Assays,
Clinical Chemistry,2011,57:5710–718
② Comparison of cardiac TnI outliers using a contemporary and a high-sensitivity assay on the Abbott Architect platform,Annals of Clinical Biochemistry,2014, Vol. 51(4) 507–511;
③ Evidence on the cause of false positive troponin I results with the Beckman AccuTnI method,Clin Chem Lab Med
2011;49(6):1079–1080
貝克曼不同項目跳值概率
Use of the BD Vacutainer Rapid Serum Tube Reduces False-Positive Results for Selected Beckman
Coulter Unicel DxI Immunoassays,Am J Clin Pathol 2011;136:325-329
雅培HIV項目跳值概率
7459例非病理樣本中,初測92例陽性,復測38例陽性,跳值概率為0.72%
文獻來源:
Evaluation of the performance of the Abbott ARCHITECT HIV Ag/Ab Combo Assay,Journal of
Clinical Virology 52S (2011) S51– S55
解決措施
降低樣本中的干擾物質對測試結果影響
控制樣本質量:采血管、離心條件&速度&溫度、采血體積
轉移到微量杯測試
離心后重新測試
樣本用竹簽挑動表層后測試
其他注意事項
解決措施——延長樣本離心時間