Zhongguo shi yan xue ye xue za zhi / Zhongguo bing li sheng li xue hui = Journal of experimental hematology / Chinese Association of Pathophysiology
-
Zhongguo Shi Yan Xue Ye Xue Za Zhi · Oct 2013
[Application value of procalcitonin and immune inflammatory factors for prediction of bacteraemia in patients with hematologic malignancy combined with febrile neutropenia].
This study was purposed to evaluate the diagnostic value of procalcitonin (PCT), C-reactive protein, interleukin-6 (IL-6), serum amyloid A (SAA) for bacteremia in patients with hematologic malignancy combined with febrile neutropenia. The total of 297 patients with hematologic malignancy combined with febrile neutropenia were analyzed retrospectively from 1253 patients admitted to West China hospital of Sichuan University from March 2011 to October 2012. They were divided into sepsis group (n = 95) and non-sepsis group (n = 202) according to blood culture. ⋯ The PCT had an AUC value of 0.974 (P < 0.05), and obviously higher than that of CRP (AUC = 0.681, P < 0.05), IL-6 (AUC = 0.661, P < 0.05) and SAA (AUC = 0.605, P < 0.05). When PCT had cut-off value of 1.06 ng/ml, sensitivity of 95.8%, specificity of 92.1%, and the Youden indicator of 0.879, the negative and positive predictive values were 97.8% and 85.0% respectively, the negative and positive likelihood ratios were 0.05 and 12.5 respectively, and all significantly higher than that of CRP, IL-6 and SAA. It is concluded that for patients with hematologic malignancy combined with febrile neutropenia and bacterial infection, the diagnostic value of serum PCT is superior to that of immune inflammatory factors (CRP, IL-6 and SAA), the PCT can predict the bacterium infection, provide laboratory evidence for rational antimicrobial drug usage and mortality reduction.
-
Zhongguo Shi Yan Xue Ye Xue Za Zhi · Oct 2013
[Genetic diagnosis of thalassemia mutations with free fetal DNA in pregnant plasma].
This research was aimed to develop a simple, rapid, accurate and non-invasive method by means of flow-through hybridization technology, which can be used for molecular screening and early prenatal diagnosis for detecting common β-thalassemias mutational genotypes. By using PCR technology combined with flow-through hybridization of low-density gene chip technology, the 6 sets of PCR primer single tube multiplex PCR system and 29 types of DNA probes were designed, then the mutational thalassemias in foetus DNA was rapidly detected in total of 60 anaemia pregnant women plasma. The results showed that 4 cases with deletional α-thalassemias, 3 cases with β-thalassemias, 1 case with mixed type of α & β-thalassemias were detected in foetus DNA of 60 pregnant women plasmas. It is concluded that the method presented in this study is easy to handle, rapid, reliable and cost-effective for detecting 3 common deletional α-thalassemias and 17 common mutational β-thalassemia.