Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Method and apparatus for determining blood pressure










Image Number 4 for United States Patent #5551438.

A transducer assembly (12) is applied to the surface of the body beneath an inflatable cuff (10). Transducers (12c) are disposed upon a substrate (12a) and may include from one to some large number of transducers suitable for detecting an oscillation resulting from arterial blood flow within a partially occluded artery. Each transducer (12c) can be of large size, relative to an artery (16), to eliminate a requirement that the transducer be accurately placed over and maintained upon the artery. The substrate can be provided to have a surface with a radius of curvature selected to approximate a curvature of the extremity to which the transducer array is applied. The cuff pressure is increased to a level above the systolic pressure of the individual and then gradually reduced. Oscillations are sensed by one or more of the transducers as the cuff pressure is decreased. When the systolic pressure is reached, the sensed oscillations begin to increase in amplitude until they reach a maximum amplitude. The cuff pressure at the point of maximum amplitude is correlated with the Mean Arterial Pressure of the subject. Methods for accomplishing a sub-diastolic continuous measurement cycle and a Mean Arterial Pressure monitoring cycle are also provided.








 
 
  Recently Added Patents
Position detection device, pointing device and input device
Process for the production of electric energy by the excitation and capture of electrons from ground or water sources
Sub-LUN input/output profiling for SSD devices
Knee guard
Combined imaging and radiation therapy
Method of analyzing cell structures and their components
Case for electronic device
  Randomly Featured Patents
Gain controlled optical fibre amplifier
Three-dimensional structures of frame beams and multiple joints
Humeral stem with distal tri-slot
Method for controlling uniformity of thin films fabricated in processing systems
Structure of transformer
Explosive detection screening system
Convolutional interleaver, convolutional deinterleaver, convolutional interleaving method, and convolutional deinterleaving method
Casket bed
Electric drive for a vehicle
Modular self-dispensing frozen confectionary maker