Blood constituent measuring apparatus
First Claim
1. A blood constituent measuring apparatus for measuring blood constituents in suction effusion fluid (SEF) obtained from the surface of skin deprived of the Keratinous layer, comprising:
- a sampling cell having a head which is brought in close contact with the skin during operation of said blood constituent measuring apparatus, an accumulating member which has a passage connected to said head to accumulate the SEF obtained by sucking the surface of the skin in a decompressed state via said head, and a tube which is connected to said passage and is used to generate said decompressed state;
a first valve which is deposed between said head and said accumulating member;
a second valve which is connected along said tube;
a third valve which is connected to said tube between said accumulating member and said second valve for discharging gas contained in the SEF accumulated in said passage through said third valve into a decompressed atmosphere; and
measuring means for measuring a blood constituent in the SEF accumulated in said passage by combining the SEF with a buffer solution;
wherein said first and second valves open and said third valve closes while the SEF is sucked from the skin in said decompressed state, and said first and second valves close and said third valve opens to decompress said passage to discharge the gas contained in the SEF into the decompressed atmosphere.
1 Assignment
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Accused Products
Abstract
A sampling cell (1) sucks body fluid, which is suction effusion fluid (SEF), into a passage by decompressive suction. At this time, the inside of the passage is under reduced pressure and accordingly the SEF contains a large amount of bubbles of oxygen and other gases. When, in this state, first opening/closing means (20, 21) provided in part of the passage are closed and third opening/closing means (25) is opened to bring the passage filled with the SEF into communication with the atmosphere, the gases contained in the SEF are discharged into the atmosphere. After that, the SEF in the passage, cleared of the gases, is supplied together with buffer solution to measuring means (7). Therefore, the SEF to be fed to the measuring means (7) can be supplied always in a fixed quantity.
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Citations
5 Claims
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1. A blood constituent measuring apparatus for measuring blood constituents in suction effusion fluid (SEF) obtained from the surface of skin deprived of the Keratinous layer, comprising:
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a sampling cell having a head which is brought in close contact with the skin during operation of said blood constituent measuring apparatus, an accumulating member which has a passage connected to said head to accumulate the SEF obtained by sucking the surface of the skin in a decompressed state via said head, and a tube which is connected to said passage and is used to generate said decompressed state; a first valve which is deposed between said head and said accumulating member; a second valve which is connected along said tube; a third valve which is connected to said tube between said accumulating member and said second valve for discharging gas contained in the SEF accumulated in said passage through said third valve into a decompressed atmosphere; and measuring means for measuring a blood constituent in the SEF accumulated in said passage by combining the SEF with a buffer solution; wherein said first and second valves open and said third valve closes while the SEF is sucked from the skin in said decompressed state, and said first and second valves close and said third valve opens to decompress said passage to discharge the gas contained in the SEF into the decompressed atmosphere. - View Dependent Claims (2, 3, 4, 5)
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Specification