发明名称 |
METHOD AND APPARATUS FOR ESTIMATING HEMATOCRIT IN A BLOOD CONSTITUENT PROCESSING SYSTEM |
摘要 |
METHOD AND APPARATUS FOR ESTIMATING HEMATOCRIT IN A BLOOD CONSTITUENT PROCESSING SYSTEM During an initial priming procedure, the blood draw/return needle(s) fluid flow system is primed with a nonblood fluid (e.g. a saline solution) having known fluid viscosity. The pressure drop occurring across the needle orifice(s) is determined at a known flow rate for this predetermined fluid of known viscosity. During subsequent blood constituent processing operations, the pressure drop across the needle orifice is measured for a second known flow rate of blood constituents. From these measured relative values of pressure and flow rates, the blood viscosity value can be calculated and used to estimate (e.g. via a table look-up or analytical calculation procedure) a hematocrit value for the blood constituents as a function of the measured blood viscosity value. |
申请公布号 |
CA1308007(C) |
申请公布日期 |
1992.09.29 |
申请号 |
CA19870549354 |
申请日期 |
1987.10.15 |
申请人 |
HEMASCIENCE LABORATORIES, INC. |
发明人 |
PRINCE, PAUL R. |
分类号 |
G01N33/49;G01N11/08;G01N33/487 |
主分类号 |
G01N33/49 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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