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Spectroscopic analyser

  • US 9,581,552 B2
  • Filed: 04/10/2012
  • Issued: 02/28/2017
  • Est. Priority Date: 04/06/2011
  • Status: Active Grant
First Claim
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1. An analyser for identifying or verifying a liquid drug sample for delivery to a patient to reduce risk of adverse drug events comprising:

  • an electromagnetic radiation source for emitting electromagnetic radiation in at least one beam at a liquid drug, the liquid drug comprising a drug in a base liquid, the liquid drug having a liquid drug spectrum and the base liquid having a base liquid spectrum comprising at least one spectral characteristic feature between substantially 1300 nm and 2000 nm, the electromagnetic radiation comprising at least two different wavelengths between substantially 1300 nm and 2000 nm, each wavelength being selected to be in the vicinity of or within a region spanning a wavelength of a spectral characteristic feature of the base liquid spectrum,a liquid drug detector that detects affected electromagnetic radiation resulting from the emitted electromagnetic radiation affected by the liquid drug, the detected affected electromagnetic radiation being indicative of spectral information of the liquid drug at the wavelengths, the liquid drug detector providing output representing the spectral information of the liquid drug at the wavelengths, anda processor configured to;

    query a database of reference liquid drugs and spectral information of the reference liquid drugs at the wavelengths, each reference liquid drug comprising a drug in a base liquid, the reference liquid drug having a reference liquid drug spectrum and the base liquid having a base liquid spectrum comprising at least one spectral characteristic feature between substantially 1300 nm and 2000 nm, the spectral information of each reference liquid drug relating to the liquid drug spectrum of the reference drug at the wavelengths such that the spectral information of each reference liquid drug comprises a contribution from the base liquid spectrum of the reference liquid drug at the wavelengths, andidentify or verify the liquid drug using;

    a) the liquid drug detector output representing the spectral information of the liquid drug, and b) the spectral information of the reference liquid drugs,wherein for each reference liquid drug in the database, the difference between the base liquid spectrum and the liquid drug spectrum of the reference drug at the wavelengths deviates from the difference between the base liquid spectrum and the liquid drug spectrum at the wavelengths for the other reference liquid drugs in the database, the deviation providing discrimination between the respective spectral information of the respective reference liquid drugs at those wavelengths to enable the drug identification or verification of the liquid drug using the output representing the spectral information of the liquid drug.

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