公开(公告)号：WO1994001749A2

公开(公告)日：1994-01-20

申请号：PCT/US1993006057

申请日：1993-06-24

Applicant: ADVANCED HAEMOTECHNOLOGIES

Inventor： ADVANCED HAEMOTECHNOLOGIES ,  MAYNARD, David, L.

IPC: G01N0

CPC classification number: G01N21/51 ,  A61M2205/331 ,  A61M2205/3313 ,  G01J2001/1647 ,  G01N2015/055 ,  G01N2021/1738 ,  G01N2021/4709 ,  G01N2201/0621 ,  G01N2201/0662

Abstract: An apparatus and method are provided for measuring the hematocrit level of blood. The presently preferred embodiment comprises a light emitting device (14) which emits an amount of light into a blood sample (12). This light travels through the blood sample to two light detecting devices (18, 20) positioned relative to the light emitting device in a predetermined geometry such that light must travel farther to reach one of the light detecting devices than to reach the other. According to the present invention, the amount of light detected by one of the light detecting devices (18, 20) is regulated so that the amount of light detected is constant. Thereafter, the amount of light detected by the unregulated light detecting device is a linear representation of the hematocrit of the blood in the blood sample. The hematocrit sensor may be used to regulate the operating parameters of an autotransfusion system to maintain the hematocrit of the blood within a predetermined range.

Abstract translation: 提供了一种用于测量血液血细胞比容水平的装置和方法。 目前优选的实施例包括将一定量的光发射到血液样本（12）中的发光装置（14）。 该光通过血液样品传播到以预定几何形式相对于发光器件定位的两个光检测装置（18,20），使得光必须比另一个更远地行进到达其中一个光检测装置。 根据本发明，由光检测装置（18,20）之一检测到的光量被调节为使得检测到的光量是恒定的。 此后，由未调节的光检测装置检测的光量是血液样品中血液的血细胞比容的线性表示。 血细胞比容传感器可用于调节自体输血系统的操作参数以将血液的血细胞比容维持在预定范围内。