Blood pressure monitor

Inactive Publication Date: 2011-05-12
DUNLOP COLIN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0017]In one embodiment, the fluid reservoir is formed by a expandable container mounted within a rigid housing, so that the expandable container can not expand beyond the volume of the rigid housing.
[0018]In an embodiment, a further advantage of the provision of the fluid reservoir is improvement of accuracy by reducing motion artef

Problems solved by technology

As the size of the limb or extremity becomes smaller, however, and as a smaller cuff must be used in these cases, accuracy of measurement is more difficult to achieve and variations between the size of patients for a particularly small cuff size have much more of a pronounced effect o

Method used

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Examples

Experimental program
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Embodiment Construction

[0046]FIG. 1 is a graph which illustrates how systemic arterial blood pressure measurements are made using a conventional blood pressure cuff. The readings may be taken by an automated system or manually, as known.

[0047]The cuff is inflated until blood flow in the target vessel (artery in arm, for example) is occluded. Pressure is then released in a controlled fashion, as illustrated by curve 1 in FIG. 1. Note that pressure may be released in a stepwise fashion (each step forming a “bleed point”) or in a continuous fashion. The less the number of bleed points available, or the shorter the continuous release curve over the operating pressure range (60 mm Hg to 180 mm Hg for a human), the less scope is allowed for error and the more likely significant error will occur in the blood pressure reading.

[0048]As the pressure is released, onset of oscillations is identified and a reading of systolic arterial pressure taken. Mean and diastolic pressures are also determined (diastolic pressure...

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PUM

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Abstract

The present invention relates to an apparatus and method for facilitating blood pressure measurement. An additional fluid reservoir is arranged to be connected in fluid communication with the blood pressure cuff. The fluid reservoir provides an additional, compliant volume to the fluid volume of the cuff, facilitating blood pressure measurement, particularly for small volume cuffs.

Description

FIELD OF THE INVENTION[0001]The present invention relates to the measurement of pressure and, more particularly, but not exclusively, to a method, system and apparatus for measuring systemic arterial blood pressure.BACKGROUND OF THE INVENTION[0002]Blood pressure is an important measurement in both veterinary and human medicine. For example, a frequent determination of blood pressure is routine during anaesthesia. It is also routine to measure blood pressure to obtain an indication of the general health of a patient.[0003]Non-invasive measurement of arterial blood pressure is almost always carried out utilising a distensible cuff or a distensible bladder enclosed in an unyielding cuff. The cuff is placed around a limb or extremity of a patient, and is then inflated until blood flow through an underlying blood vessel (usually an artery) is occluded.[0004]The cuff is then deflated in a controlled manner and measurements taken to detect occurrence of blood flow through the vessel. The m...

Claims

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Application Information

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IPC IPC(8): A61B5/022
CPCA61B5/022A61B5/02225A61B5/205A61B5/746A61B5/02233A61B5/0235A61B5/742A61B5/02141
Inventor DUNLOP, COLIN
Owner DUNLOP COLIN
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