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
Transferases and oxidoreductases, nucleic acids encoding them and methods for making and using them
Polypeptide microparticles
System and method for enhancing buyer and seller interaction during a group-buying sale
Micromechanical component, device for beam deflection of monochromatic light, and spectrometer
Key management using quasi out of band authentication architecture
Chair
High order continuous time filter
  Randomly Featured Patents
Providing virtual talk group communication sessions in accordance with endpoint resources
Method and device for the coarse differentiation between a liquid or a bulk material of a filling product present in a receptacle
Code reading pattern and an image pickup apparatus for reading the pattern
Golfer's tool
Novel hybrid electric vehicle
Culture device for sampling and/or counting micro-organism
Labelled, returnable plastic crate
Computer cache system with deferred invalidation
Image forming apparatus
Device for treating tissue and methods thereof