Electrical method and apparatus for non-contact determination of physical and/or chemical properties of a sample, particularly of blood
First Claim
1. A method for investigating one or more parameters of biofluids, particularly blood in respect of protein and cellular concentrations and cellular volume, comprising the steps of:
- applying to a sample of the biofluid and without direct contract with the sample at least two a.c. frequencies in a range of 0.1 to 60 MHz;
simultaneously receiving and resolving said frequencies after their passage through said fluid;
obtaining subsequent d.c. voltage amplitudes by detection of said received and resolved frequencies;
thereafter applying mathematical processing to said d.c. voltage amplitudes to provide a numeric output which correlates with at least one of said parameters.
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Abstract
A method and apparatus for investigating various parameters of biofluids, such as blood, particularly protein and cellular concentrations and cellular volume utilises the application of at least two a.c. frequencies, preferably simultaneously, in the range 0.1 to 60 MHz to a sample of the fluid and receiving and resolving the frequencies after passage through the fluid. The received frequencies are processed to derive corresponding d.c. voltage amplitudes which are mathematically processed to provide a numeric output correlating with a parameter under investigation, A new parameter named Instant Sedimentation Rate (ISR) is disclosed.
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Citations
21 Claims
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1. A method for investigating one or more parameters of biofluids, particularly blood in respect of protein and cellular concentrations and cellular volume, comprising the steps of:
- applying to a sample of the biofluid and without direct contract with the sample at least two a.c. frequencies in a range of 0.1 to 60 MHz;
simultaneously receiving and resolving said frequencies after their passage through said fluid;
obtaining subsequent d.c. voltage amplitudes by detection of said received and resolved frequencies;
thereafter applying mathematical processing to said d.c. voltage amplitudes to provide a numeric output which correlates with at least one of said parameters. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
- applying to a sample of the biofluid and without direct contract with the sample at least two a.c. frequencies in a range of 0.1 to 60 MHz;
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19. An apparatus for obtaining a numeric output which correlates with at least one or more parameters of a biofluid, said parameters including protein and cellular concentrations and cellular volume of blood, the apparatus comprising:
- a measurement cell for containing a sample of a biofluid;
means for applying a signal having at least two a.c. frequencies in a range of 0.1 to 60 MHz to the said sample of the biofluid within said cell and without direct contact with the sample;
means for receiving and resolving said signal having at least two a.c. frequencies after passage through said sample of biofluid;
means for obtaining d.c. voltage amplitudes by detection of said received and resolved signal having at least two a.c. frequencies; and
means for applying a mathematical processing to said obtained d.c. voltage amplitudes to provide said numeric output which correlates with at least one of said one or more parameters of the biofluid. - View Dependent Claims (20, 21)
- a measurement cell for containing a sample of a biofluid;
Specification