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
Terminal device and image printing method
Illuminating waveguide fabrication method
Client-managed group communication sessions within a wireless communications system
Probe for ultrasound diagnostic apparatus
Method for forming contact hole
Nucleic acid-based tests for prenatal gender determination
Signal conversion control circuit for touch screen and method thereof
  Randomly Featured Patents
Slide out support for server cabinet
Apparatus for mounting a trailer hitch on a vehicle
Method of selecting image, program and storage medium for the method, and image processing apparatus using the method
Nitride semiconductor light generating device
Method for permanent occlusion of fallopian tube
Life preserver
Vessel for food preparation
Electrical appliance for preserving and chilling fruit
Range section preexhaust
Mold clamping mechanism for injection molding machine