Blood pressure measuring equipment
First Claim
1. Blood pressure measuring equipment comprisinga sleeve attachable to a limb of a person, said sleeve defining a chamber inflatable by fluid and being provided with a measurement transducer for measuring the circumference or diameter of a limb to which said sleeve is attached, said transducer comprising two electrodes so arranged on said sleeve as to provide, when said sleeve is attached to a limb, a capacitor having a capacitance dependent on the circumference of the limb,a pressure sensor for detecting fluid pressure in said chamber, andpressure value determining means electrically connected to said sensor to determine values of detected pressure levels in said chamber, said pressure value determining means comprisingpressure value correcting means connected to said transducer and adapted to correct at least some of said determined pressure values in dependence on the limb circumference or diameter measurement determined by said transducer.
1 Assignment
0 Petitions
Accused Products
Abstract
There is disclosed blood pressure measuring equipment comprising a sleeve with a chamber inflatable by fluid and a measurement transducer for determining the circumference of an arm to which the sleeve is attached. A pressure sensor is provided to detect pressure in the chamber and is electrically connected through electronic components with two analog stores for storage of measured pressure values representing systolic and diastolic blood pressure. An indicating control device is connected between the stores and a digital display unit and comprises a pressure value correcting device by means of which the pressure values can be corrected, in dependence on the circumference of the arm as determined by the transducer, during readout of the stores. As a result, errors in the pressure values due to different arm circumferences can be eliminated.
-
Citations
9 Claims
-
1. Blood pressure measuring equipment comprising
a sleeve attachable to a limb of a person, said sleeve defining a chamber inflatable by fluid and being provided with a measurement transducer for measuring the circumference or diameter of a limb to which said sleeve is attached, said transducer comprising two electrodes so arranged on said sleeve as to provide, when said sleeve is attached to a limb, a capacitor having a capacitance dependent on the circumference of the limb, a pressure sensor for detecting fluid pressure in said chamber, and pressure value determining means electrically connected to said sensor to determine values of detected pressure levels in said chamber, said pressure value determining means comprising pressure value correcting means connected to said transducer and adapted to correct at least some of said determined pressure values in dependence on the limb circumference or diameter measurement determined by said transducer.
-
6. A sphygmometer comprising:
-
a cuff wrappable about a limb and having end portions that overlap when wrapped around the limb, whereby the extent of overlap is proportional to the limb size; respective electrodes on the overlapping portions of the cuff; means for inflating the cuff, tightening same on the limb, and thereby juxtaposing the electrodes with each other, the electrodes forming a capacitor whose capacitance varies with limb size; means for detecting fluid pressure in the cuff and for generating an output corresponding thereto; circuit means connected to the electrodes for determining the capacitance therebetween and to the pressure-detecting means for modifying the output in accordance with limb size; and means for displaying the modified output. - View Dependent Claims (7, 8, 9)
-
Specification