title: Quantitative determination of fibrinogen of patients with coronary heart diseases through piezoelectric agglutination sensor.
abstract: Fibrinogen can transform fibrin through an agglutination reaction, finally forming fibrin polymer with grid structure. The density and viscosity of the reaction system changes drastically during the course of agglutination. In this research, we apply an independently-developed piezoelectric agglutination sensor to detect the fibrinogen agglutination reaction in patients with coronary heart diseases. The terminal judgment method of determining plasma agglutination reaction through piezoelectric agglutination sensor was established. In addition, the standard curve between plasma agglutination time and fibrinogen concentration was established to determinate fibrinogen content quantitatively. The results indicate the close correlation between the STAGO paramagnetic particle method and the method of piezoelectric agglutination sensor for the detection of Fibrinogen. The correlation coefficient was 0.91 (γ = 0.91). The determination can be completed within 10 minutes. The fibrinogen concentration in the coronary heart disease group was significantly higher than that of the healthy control group (P < 0.05). The results reveal that high fibrinogen concentration is closely correlated to the incurrence, development and prognosis of coronary heart diseases. Compared with other traditional methods, the method of piezoelectric agglutination sensor has some merits such as operation convenience, small size, low cost, quick detecting, good precision and the common reacting agents with paramagnetic particle method.
authors.affiliation: Laboratory, The Clinical Experimental Base of Biosensor and Microarray, The Center of Molecule and Gene Diagnosis, Southwest Hospital, Third Military Medical University, Chongqing 400038, China. cqh1969@yahoo.com.cn
authors.forename: Qinghai
authors.initials: Q
authors.lastname: Chen
authors.forename: Xing
authors.initials: X
authors.lastname: Hua
authors.forename: Weiling
authors.initials: W
authors.lastname: Fu
authors.forename: Dongbo
authors.initials: D
authors.lastname: Liu
authors.forename: Ming
authors.initials: M
authors.lastname: Chen
authors.forename: Guoru
authors.initials: G
authors.lastname: Cai
mesh_terms: D000372:Agglutination Tests / Q000295:instrumentation* / Q000379:methods; D015374:Biosensing Techniques / Q000295:instrumentation* / Q000379:methods; D003327:Coronary Disease / Q000097:blood*; D005260:Female; D005340:Fibrinogen / Q000032:analysis*; D006801:Humans; D016014:Linear Models; D008297:Male; D008875:Middle Aged; D011791:Quartz
chemical_list: D011791:Quartz; D005340:Fibrinogen