Automatic blood pressure measurement in hyperbaric chamber
First Claim
1. An assembly for measuring the blood pressure of a subject disposed in a hyperbaric chamber containing high purity oxygen whose internal pressure is higher than atmospheric pressure, said assembly comprising:
- a) a cuff in the chamber for securement to an appendage of the subject;
b) means located externally of the chamber for inflating said cuff;
c) means located externally of the chamber for sensing and storing cuff pressure values, said means for sensing and storing including a differential pressure transducer;
d) means for connecting a pressure sensing side of said differential pressure transducer with the interior of said cuff; and
e) means for connecting a reference side of said differential pressure transducer to a pressure source having a gas pressure equal to that of the interior of the chamber, but which pressure source is free of high purity oxygen.
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Accused Products
Abstract
Blood pressure measurements are performed on subjects disposed in hyperbaric chambers. The measurements are made by an automatic blood pressure monitoring instrument having a differential pressure transducer component. The pressure on the reference side of the pressure transducer is equal to the pressure in the hyperbaric chamber. The reference pressure is derived from a pressure source which equals the pressure in the hyperbaric chamber, but which pressure source does not contain the high purity oxygen gas in the hyperbaric chamber.
21 Citations
4 Claims
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1. An assembly for measuring the blood pressure of a subject disposed in a hyperbaric chamber containing high purity oxygen whose internal pressure is higher than atmospheric pressure, said assembly comprising:
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a) a cuff in the chamber for securement to an appendage of the subject; b) means located externally of the chamber for inflating said cuff; c) means located externally of the chamber for sensing and storing cuff pressure values, said means for sensing and storing including a differential pressure transducer; d) means for connecting a pressure sensing side of said differential pressure transducer with the interior of said cuff; and e) means for connecting a reference side of said differential pressure transducer to a pressure source having a gas pressure equal to that of the interior of the chamber, but which pressure source is free of high purity oxygen. - View Dependent Claims (2, 3, 4)
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Specification