Title:
【発明の名称】中心静脈圧の非侵襲的監視方法および装置、およびこれに用いる改良された変換器
Document Type and Number:
Japanese Patent JP2682718
Kind Code:
B2
Abstract:
A method and apparatus for measuring central venous pressure (CVP) is disclosed, along with an improved transducer (50) for measuring CVP in infants. Changes in CVP may also be monitored by employing the method and apparatus of the invention. According to the invention, a transducer is disposed on the neck of a subject (or on the head in the case of infants), and the signal from the transducer is processed to obtain the cardiac component. Thereafter, the vertical distance from the transducer to a reference level is adjusted until the position is located at which the signal transitions between a venous configuration and an arterial or mixed venous-arterial configuration, at which position the vertical distance approximates CVP.
Inventors:
Sackner, Marvin A.
Application Number:
JP50970189A
Publication Date:
November 26, 1997
Filing Date:
August 24, 1989
Export Citation:
Assignee:
Non-Invasive Monitoring Systems Incorporated
International Classes:
A61B5/0215; A61B5/022; A61B5/00; A61B5/103; (IPC1-7): A61B5/022; A61B5/00
Other References:
【文献】米国特許4452252(US,A)
Attorney, Agent or Firm:
Shintaro Nogawa