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
Human renal disease marker substance
Inhibitors of bacterial nitric oxide synthase, and related screening methods
Plants and seeds of corn variety CV294874
Architectural panel with millet and grass
Utility knife
Reducing voltage stress in a flyback converter design
Contact lens material
  Randomly Featured Patents
Food product with flavoring and method for producing the same
Well tools utilizing swellable materials activated on demand
Toothbrush holder
Polyamide-based transparent composition
Fitting assembly for an air spoiler
Power spiral conveyor section and method
Method and apparatus for stereoscopic display employing a transmissive active-matrix liquid crystal pixel array
Head clamp safety locking pin
Pharmaceutical preparation comprising an active dispersed on a matrix
Yarn for manufacturing artificial furs