The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 26, 2003
Filed:
Aug. 03, 2001
Richard Caterini, Orlienas, FR;
Michel Trifot, Genas, FR;
Delegation Generale pour l'Armement DSP/SREA/BPI, Arcueil, FR;
Abstract
The invention relates to a device for measuring the change in the diameter of a vein by the Doppler effect. The device operates such that when a first signal is generated, it controls a transmission and reception probe in continuous mode in order to obtain an audible signal from a speaker as a function of the position of a transmission and reception probe relative to a vein in order to locate the vein, and when a second signal is generated once the vein has been located, the second signal controls the transmission and reception probe in discontinuous mode and, from the changes in frequency between the transmitted and received ultrasonic waves, determines the diameter of the vein to ensure that its changes are displayed.