假阴性

2组在确诊率、假阴性率、气胸发生率进行统计学处理，经χ2检验，P值0.05，两者均无显著性差异。

No differences between two groups in diagnostic accuracy , false-negative rate and pneumothorax rate found .

最近的研究显示，用于H1N1感染的有些检测方法不完全可靠，所以假阴性结果是经常出现的问题。

As recent studies have shown , some tests for H1N1 infection are not entirely reliable , and false-negative results are a frequent problem .

癌症检查的结果中，假阴性占一定比例的现象受到极大关注。

The percentage of false negatives generated by the cancer test is of great concern .

腹部X线平片与CT假阴性诊断分别为4例和2例。

There were 4 CT false negative cases and 2 plain film false negative cases .

17例恶性肿瘤~（18）氟脱氧葡萄糖PET显像假阴性的分析

Malignant tumor with false negative ~ ( 18 ) F-FDG PET image

结论：临床检查诊断急性前交叉韧带损伤的假阴性率较高，MRI是早期诊断急性前交叉韧带损伤的有效方法。

Conclusion : The diagnosis of clinical examination in acute anterior cruciate ligament tears has a high false-negative .

3DDSA的MIP真阳性率94%，假阴性率为6%；

The same two rates of 3D DSA were 94 % and 6 % respectively ;

ER与PR在钼靶X线假阴性乳腺癌中的表达及临床意义肉芽肿性乳腺炎的数字钼靶X线表现

Expression and clinical significance of estrogen receptor and progesterone receptor of breast cancer with false-negative mammograms

CT的真阳性率为73%，假阴性率为27%，敏感性100%。

The true positive rate of CT was 73 % , the false negative rate was 27 % , and the sensitivity was 100 % .

结论：ELISA法A、B试剂存在比例不等的HBeAg假阴性。

Conclusion : It is suggested that ELISA examination using reagent A or B can lead to false-negative results of HBeAg .

结论肺细支气管肺泡癌组织的FDG摄取高于正常肺组织，但是许多细支气管肺泡癌SUV低于25，造成了FDGPET检查中的假阴性。

The false negative rate is lower in bronchial alveolar carcinoma by FDG-PET .

这说明ABC-ELISA法敏感性高，并可减少常规ELISA法的假阴性率。

It shows that the ABC-ELISA can decrease the rate of false negative .

两步法工艺设计，在提高检测灵敏度的同时，减小了HOOK效应引起的假阴性。

Two-step technological design decreases the false positive caused by HOOK effect and improves the detection sensitivity at the same time .

HCG酶免疫测定在辅助诊断滋养细胞疾患中的假阴性问题

The problem of false negative of hCG enzyme immunoassay used as an assistant diagnostic measure in trophoblastic diseases

结果肿瘤组中33例胸水流式细胞DNA异倍体呈阳性，8例呈阴性，假阴性率为19.5%。

Results In the tumor group , the 33 results of the DNA heteroploid detection were positive and the other 8 ones were negative , the false negative percentage was 19.5 % .

1例SLN转移假阴性。

One case was of false negative metastasis by SLN .

用较高浓度，较完整长度及不含或少含蛋白成分的核酸作模板，并使用更敏感的方法检测PCR产物，可避免假阴性反应和提高PCR技术的敏感性和特异性。

It is better to use more high concentration and integrated length DNA as template for avoiding false negative result and improving the sensitivity and specificity of PCR .

应用双带PCR方法（DB－PCR）检测了240份血清中HBV－DNA，该方法能直接观察和判断假阴性和假阳性结果，提高了检测的准确性。

Serum HBV-DNA was detected by double band polymerase chain reaction ( DB-PCR ), which could show false negative and false positive activity besides positive and negative results .

结论巢式PCR是一种敏感、快速诊断HCMV感染的方法，灵敏度及特异性均高于传统ELISA法，并能弥补ELISA的假阴性。

Conclusion Nest PCR is a sensitive and rapid method to detect HCMV infection , and its sensitivity and specificity were higher than ELISA .

N1组7例准确度仅57.1%，假阴性2例，阴性预测符合率0。

In 2 of 7 cases with the false - negative SLN .

30例胸水CEA呈阳性，11例呈阴性，假阴性率为26.8%。

30 results of CEA detection were positive and 11 ones were negative ; the false negative percentage was 26.8 % .

目的对酶联免疫吸附试验（ELISA）法检测人体血清中艾滋病病毒（HIV）1+2型抗体结果的不确定度进行评定，降低初筛试验出现假阴性结果的风险。

Objective To evaluate uncertainty in detecting HIV 1 + 2 antibody by ELISA in order to reduce risk due to false negative results in serum screening tests .

第三个可能的原因是原发肿瘤延迟固定和假阴性结果，这个能解释复发病灶的ER阳性表达。

A third possibility is delayed fixation and false negative results for the primary tumor , which could explain some of the gain of ER in recurrence .

结论恶性肿瘤18F-FDGPET假阴性与病理学类型、分化程度及病灶大小有关；

Conclusion False negative18F-FDG PET in malignant tumor may be correlated with the pathologic type , differentiation degree and the lesion size .

结论：CSA体外敏感试验与临床疗效有一定相关性，如体外敏感，则体内100%敏感，但存在一定假阴性。

If it is sensitive in vitro , rate of sensitivity in vivo is 100 % , but there are some false negative .

很多细支气管肺泡癌病例FDG-PET检查可呈现假阴性。

Bronchial alveolar carcinomas lead to many false negative cases in FDG-PET .

结果：SEP传导速度在脊髓损伤后15分钟出现显著性变化，共出现四次假阴性结果。

Result : SEP conducted velocity changed significantly at 15 minutes after spinal striking and presented false negative changes for 4 times .

NST无反应型预测价值8%，假阴性率92%。

The predictive value of negative NST was 8 % , with 92 % false negative rate .

未着色者128例，也作粘膜活检，检查有无Hp，结果仅有2例浅表性胃炎有Hp感染，染色法的假阴性率1.56%。

In 128 uncolored patients , only two cases of superficial gastritis proved to be infected with Hp which were also confirmed by biopsy . The false negative rate was 1.56 % .

SLN假阴性，或淋巴结跳跃性转移，需要进一步研究。

It is necessary to carry out further study that SLN was false positive or lymph nodes had jumping metastases .