Erythrocyte sedimentation rate measuring apparatus
First Claim
1. An apparatus for measuring erythrocyte sedimentation rate, comprising test cell support means (18, 20, 24, 26) adapted to position at least one test cell (22) in parallel orientation with respect to the vertical direction, comprising a measuring head (36) measuring the optical density of blood and including at least one light barrier (48, 52), comprising head drive means (34, 40) for providing relative movement between the test cell support means and the measuring head in a direction parallel to the positioning direction of the test cells (22), a position sensor (42, 76) providing a position signal corresponding to the relative position of said at least one test cell (22) and measuring head (36), and an evaluating processor (74) which receives the output signals of the measuring head (36) as well as the position signal and continuously stores (84) the output signals of the measuring head (36) and the associated position signals and compares the stored position signals with at least one reference curve (6, 90;
- 94-100) and from this comparison extrapolates a presumable final value of the position of the interphase defined between the serum and the blood cake and also determines the sedimentation rate.
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Abstract
An apparatus for measuring the erythrocyte sedimentation rate comprising a measuring head having at least light barrier, which can be moved along a test cell containing a blood sample. The output signals of light detectors (52, 54, 60) of the light barriers are fed to an evaluating processor (74), which continuously compares the profiles of the optical density obtained at different measuring times with various reference curves having a known final value of the position of the interphase between the serum and the blood cake.
31 Citations
8 Claims
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1. An apparatus for measuring erythrocyte sedimentation rate, comprising test cell support means (18, 20, 24, 26) adapted to position at least one test cell (22) in parallel orientation with respect to the vertical direction, comprising a measuring head (36) measuring the optical density of blood and including at least one light barrier (48, 52), comprising head drive means (34, 40) for providing relative movement between the test cell support means and the measuring head in a direction parallel to the positioning direction of the test cells (22), a position sensor (42, 76) providing a position signal corresponding to the relative position of said at least one test cell (22) and measuring head (36), and an evaluating processor (74) which receives the output signals of the measuring head (36) as well as the position signal and continuously stores (84) the output signals of the measuring head (36) and the associated position signals and compares the stored position signals with at least one reference curve (6, 90;
- 94-100) and from this comparison extrapolates a presumable final value of the position of the interphase defined between the serum and the blood cake and also determines the sedimentation rate.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
Specification