[Study of noninvasive measurement of venous pressure].
A new device that allows noninvasive measurement of venous pressure has been invented in our laboratory and tested for its feasibility and validity. The device consists of four parts: 1. the air infusion system; 2. the pressure sensor gauge; 3. signal transducer and data processing system 4. the fixing apparatus. The correlation between noninvasive pressure and invasive pressure has been studied in vitro test on a saphenous vein model and in vitro test on dog's portal venous system. In vitro and vivo study, an excellent correlation between noninvasive pressure and invasive pressure was obtained(r = 0.99, P < 0.0005; r = 0.97, P < 0.005). These data suggest that the new device allows a noninvasive measurement of venous pressure especially for the large veins such as vena cava, venae pulmonales and esophageal varices.
Zhu
Shaihong
S
Third Xian Ya Hospital of Central South University, Changsha 410013.
Liu
Xunyang
X
Huang
Feizhou
F
Nie
Wanpin
W
Liu
Bo
B
Li
Ruizheng
R
Cai
Lifeng
L
Yang
Minshi
M
D000818:Animals; D001795:Blood Pressure Determination / Q000295:instrumentation*; D004285:Dogs; D004867:Equipment Design; D066298:In Vitro Techniques; D014690:Venous Pressure / Q000502:physiology*