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:
May. 25, 2004
Filed:
Sep. 05, 2002
David A. Lerner, St. Paul, MN (US);
William Lee Rogers, Oakdale, MN (US);
Biomedix, Inc., Vadnais Heights, MN (US);
Abstract
A system and method for simultaneous, bilateral, segmental blood pressure measurement are disclosed. In one illustrative embodiment of the invention, two Doppler modules are configured to operate at nominally the same Doppler carrier frequency so that they probe for substantially the same range of physiological information. However, the Doppler carrier frequencies for the Doppler modules are also sufficiently different to substantially avoid interference between the two modules. A phase-locked loop (PLL) used to demodulate the velocity signals in each Doppler module efficiently blocks interference signals because they have frequencies that are the difference in the Doppler carrier frequencies and that are outside the locking range of the PLL. Broad-band RF amplifiers and Doppler transducers are used to ensure that the frequency responses of the Doppler modules are substantially the same.