جستجوی مقالات مرتبط با کلیدواژه « dimer » در نشریات گروه « پزشکی »

 

Aortic dissection is a rare and important emergency condition, which usually involves a high mortality rate. Yet, early diagnosis of the disorder would increase the survival rate significantly.

The present systematic study and meta-analysis aimed at investigating the efficiency of D-dimer test in diagnosis of aortic dissection.

The data used in this study were extracted from PubMed, Scopus, Elsevier, Springer, and Willey databases. Specificity, D-dimer, Sensitivity, and Aortic Dissection were the valid keywords used to extract the related articles. Totally, 11 papers published during 1998 - 2007 were selected. I2 index was used to assess heterogeneity across the studies.

A total of 596 subjects (averagely 54.5 ones in each study) were examined in the present research and 11 articles were entered into the final meta-analysis. According to the findings, the mean of the specificity test was 0.66 (0.54 - 0.78), with I2 index = 74.9% and p-value = 0.001. Additionally, the mean of the sensitivity test was 0.98 with I2 index = 606% and p-value = 0.381. Moreover, the mean D-dimer plasma level was 18.6 ug/mL in patients suffering from aortic dissection.

This study showed the high efficiency of D-dimer test in diagnosis of aortic dissection. Thus, physicians are recommended to apply this quick and inexpensive method when a final diagnosis has not been made yet. Early diagnosis of aortic dissection via D-dimer test would result in implementation of the necessary treatments, eventually leading to a significant decrease in mortality rate

Safe exclusion and risk stratification are currently recommended for the initial management of patients with acute pulmonary embolism (APE). The aim of this study was to assess the safe exclusion and risk stratification value of D-dimer (DD) for APE when testedat the beginning of admission. All consecutive Chinese APE patients and controls were recruited from January 2010 to December 2012. All measurements of serum indexes were made in duplicate and blinded to the patients’ status. All the 40 patients with the first episode of APE were confirmed by multi-detector computed tomographic pulmonary angiography. The plasma prothrombintime (PT), activated partial thromboplastin time, thrombin time, fibrinogen, and DD levels were measured within 24 h of admission. We used the Mann-Whitney U-test to determine the differences between groups and drew receiver operator characteristic curve to evaluate the indexes’ value in the APE screening. The PT and DD in the APE group were significantly higher than those in the disease control group (P < 0.05). Taking PT and DD as the useful screening tests for APE and AUC was 0.765 and 0.822, respectively. DD yielded the higher screening efficiency, with DD >1820 μg/L as cut-off value, the sensitivity, specificity, positive and negative predictive value was 82.5%, 75.2%, 56.9%, and 91.6%, respectively. The patients with APE showed significant higher DD levels compared with disease controls, suggesting a negative qualitative DD test result can safely and efficiently exclude APE in primary care.

Thromboembolism is the most important complication of cancers.The aim of this study was to determine D-dimer levels in benign and malignant tumors of the uterus, ovary and cervix. Subjects and This was a cross sectional study and it was conducted on 90 female patients referred to Imam Khomeini and Arash Hospitals because of uterine, cervical and ovarian tumors in 2013-2014. After surgical resection or tissue biopsy, 2 cc of each patient’s blood was taken to be sent to laboratory of hospitals. “Nycocard” kit was chosen to measure D-dimer levels in Mg/Lit by neflumetry method. Data were analyzed in SPSS-16 by T-test and One-Way ANOVA test. The highest mean of D-dimer was 3.9 (± 2.9SD) in malignant cervical tumors. The mean plasma levels of D-dimer in malignant uterine cancers (P = 0.008), ovarian cancers (P = 0.007) and cervical cancers (P = 0.006) was significantly higher than benign tumors. In all three types of uterine, ovarian and cervical cancers, D-dimer was significantly higher in advanced stages than lower stages. The plasma D-dimer levels in patients with malignant tumors of the uterus, cervix and ovary were higher than benign types. By increasing the stage of gynecologic malignant tumors, the levels of plasma D-dimer were increased.