Patent EP0595237A1 successfully refreshed from Google Patents.
EP0595237A1
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EP
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Blood constituent measuring apparatus
Assignee: NEC Corp
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Filing: 1993-10-25
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Granted: —
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Expires: 2013-10-25
Abstract
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.
Inventors
- 👤 Akio Kaneyoshi
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 20:21
CPC Classifications
G; G01; G01N; G01N35/00; G01N35/10; G01N35/1095; G01N35/1097; A; A61; A61B; A61B5/00; A61B5/145; A61B5/14507; A61B5/1451; A61B5/14514; A61B5/14532; A61B5/44; A61B5/441; C; C12; C12Q; C12Q1/00; C12Q1/001; C12Q1/005; C12Q1/006; A61B10/00; A61B10/0045; A61B2010/008
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
147 words
A blood constituent measuring apparatus for measuring blood constituents by utilizing suction effusion fluid (SEF) obtained by sucking the surface of skin deprived of the keratinous layer, comprising: a sampling cell (1) having a passage (34A) in which is accumulated SEF obtained by sucking skin under reduced pressure with the cell kept in close contact with the skin; first opening/closing means (20, 21) for forming a closed passage by closing both ends of the passage in a decompressed state in which the said SEF has accumulated; second opening/closing means (25) for releasing the decompressed state of said closed passage; discharging means (36, 38) for discharging, after the operation of said second opening/closing means, the SEF in said closed passage together with buffer solution; and measuring means (7) for measuring a specific blood constituent in said SEF from its mixture with buffer solution discharged from said discharging means.
Claim 2
Dependent Claim
119 words
A blood constituent measuring apparatus, as claimed in Claim 1, wherein: said sampling cell has a head (32) which comes into close contact with said skin; a rotatable member (34) having a passage in which SEF, sampled by decompressive suction via said head, is accumulated; and a tube (35) connected to said rotatable member, said first opening/closing means has a first opening/closing valve (20) for opening and closing a passage between said skin and said rotatable member, and a second opening/closing valve (21) for opening and closing a passage in said tube; said second opening/closing means has, between said rotatable member and said second opening/closing valve, a third opening/closing valve (25) for releasing the decompressed state in said tube.
Claim 3
Dependent Claim
30 words
A blood constituent measuring apparatus, as claimed in Claim 2, wherein said discharging means is connected to the passage in said rotatable member by the rotation of said rotatable member.
Claim 4
Dependent Claim
32 words
A blood constituent measuring apparatus, as claimed in Claim 2, wherein said first, second and third opening/closing valves consist of electromagnetic valves, and control means is provided to control said electromagnetic valves.
Claim 5
Dependent Claim
24 words
A blood constituent measuring apparatus, as claimed in Claim 2, having a housing section (33) for holding said rotatable member in a rotatable manner.
Claim 6
Dependent Claim
24 words
A blood constituent measuring apparatus, as claimed in Claim 1, wherein said measuring means has a sensor (9) for detecting the concentration of glucose.
Claim 7
Dependent Claim
24 words
A blood constituent measuring apparatus, as claimed in Claim 6, wherein said buffer solution contains a constituent for assisting said sensor in detecting glucose.
References Cited (Backward Citations)
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