title: A study on new method of noninvasive esophageal venous pressure measurement based on the airflow and laser detection technology.
abstract: Using optics combined with automatic control and computer real-time image detection technology, a novel noninvasive method of noncontact pressure manometry was developed based on the airflow and laser detection technology in this study. The new esophageal venous pressure measurement system was tested in-vitro experiments. A stable and adjustable pulse stream was produced from a self-developed pump and a laser emitting apparatus could generate optical signals which can be captured by image acquisition and analysis system program. A synchronization system simultaneous measured the changes of air pressure and the deformation of the vein wall to capture the vascular deformation while simultaneously record the current pressure value. The results of this study indicated that the pressure values tested by the new method have good correlation with the actual pressure value in animal experiments. The new method of noninvasive pressure measurement based on the airflow and laser detection technology is accurate, feasible, repeatable and has a good application prospects.
authors.affiliation: Department of General Surgery, The Third Xiangya Hospital of Central South University, 138 Tongzipo Road, Yuelu District, Changsha, 410013, China.
authors.forename: Chenghuan
authors.initials: C
authors.lastname: Hu
authors.affiliation: Department of General Surgery, The Third Xiangya Hospital of Central South University, 138 Tongzipo Road, Yuelu District, Changsha, 410013, China.
authors.forename: Feizhou
authors.initials: F
authors.lastname: Huang
authors.affiliation: Department of General Surgery, The Third Xiangya Hospital of Central South University, 138 Tongzipo Road, Yuelu District, Changsha, 410013, China.
authors.forename: Rui
authors.initials: R
authors.lastname: Zhang
authors.affiliation: Department of General Surgery, The Third Xiangya Hospital of Central South University, 138 Tongzipo Road, Yuelu District, Changsha, 410013, China.
authors.forename: Shaihong
authors.initials: S
authors.lastname: Zhu
authors.affiliation: Department of General Surgery, The Third Xiangya Hospital of Central South University, 138 Tongzipo Road, Yuelu District, Changsha, 410013, China.
authors.forename: Wanpin
authors.initials: W
authors.lastname: Nie
authors.affiliation: Department of General Surgery, The Third Xiangya Hospital of Central South University, 138 Tongzipo Road, Yuelu District, Changsha, 410013, China.
authors.forename: Xunyang
authors.initials: X
authors.lastname: Liu
authors.affiliation: School of Information Science and Engineering, Central South University, 22 Shaoshan South Road, Tianxin District, Changsha, 410083, China.
authors.forename: Yinglong
authors.initials: Y
authors.lastname: Liu
authors.affiliation: School of Traffic and Transportation Engineering, Central South University, 22 Shaoshan South Road, Tianxin District, Changsha, 410083, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Li
mesh_terms: D000818:Animals; D001795:Blood Pressure Determination / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D004932:Esophageal and Gastric Varices / Q000175:diagnosis* / Q000503:physiopathology*; D020701:Esophagoscopes; D006801:Humans; D007834:Lasers; D011817:Rabbits; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D014690:Venous Pressure / Q000502:physiology*
keywords: Airflow; laser; noninvasive; pressure measurement