Patent ID: 6268910
Filing Date: 2001-07-31
Classification: A61M,G01N

Abstract:
An apparatus for determining the concentration of at least one interferent in plasma in tubing where said tubing connects containers of said plasma, the apparatus comprising:(A) a tubing holder comprising:(i) a stationary part having a cavity adapted to accept said tubing;(ii) a first optical fibre directed into said cavity positioned to transmit radiation into said tubing;(iii) a second optical fibre directed into said cavity positioned to receive radiation from said tubing, said first and second fibres being stationary and defining a constant fixed optical path length through said tubing and plasma across said cavity; and(iii) a lid which covers said cavity;(B) a lamp connected to said first fibre to provide said radiation;(C) a spectrophotometer to measure said received radiation from said second fibre; and(D) a computer means connected to said spectrophotometer for calculating a concentration of said at least one interferent based on said measurement to provide said concentration.