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Blood Pressure Measuring Device

IP.com Disclosure Number: IPCOM000086184D
Original Publication Date: 1976-Aug-01
Included in the Prior Art Database: 2005-Mar-03
Document File: 2 page(s) / 31K

Publishing Venue

IBM

Related People

Manns, KL: AUTHOR

Abstract

On hemodialysis procedures, one of the factors to be constantly checked is the changes in the blood pressure. It is not necessary that absolute values be determined but relative changes in pressure should be measured. The blood contacting part of the measuring device must be disposable, have no moving parts, be smooth internally, and inexpensive.

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Blood Pressure Measuring Device

On hemodialysis procedures, one of the factors to be constantly checked is the changes in the blood pressure. It is not necessary that absolute values be determined but relative changes in pressure should be measured. The blood contacting part of the measuring device must be disposable, have no moving parts, be smooth internally, and inexpensive.

The device diagrammed is made of a medically acceptable material and comprises a main body 1 which can be inserted in a blood supply tubing 2. An opening 3 having at least one flat side 4 passes through the body 1 to connect the parts of tubing 2 for fluid flow. At about the middle of the flat side 4, the outer flat surface 5 is provided with a depression 6 to within about 20 mils of the inner surface 4, to form a pressure diaphragm 7 which will fluctuate with the blood pressure.

The pressure is sensed by an optical sensor 8, Fig. 1, which can be mounted on studs 9 on body 1. The sensor 8 can be readily attached and detached and is a permanent part of the treatment device. It will indicate both the initial and differential movements of the diaphragm 7 but only as relative, not absolute, measurements. Such relative indications may be made with a wide tolerance range to enable the body 1 to be manufactured at a low cost. An attached computer need only be responsive to the pressure variations measured by sensor 8 to adequately monitor the patient's condition.

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