Disposable sample card and method of making same

A blood sample carrier for use in measuring conductivity of a blood sample, said carrier comprising:

• capillary tube means for receiving a blood sample;
• first and second electrode means disposed within said capillary tube means in a spaced relationship;
• measurement cell means, formed by said capillary tube means and bounded by said first and second electrode means, for segregating a predetermined volume of said liquid sample;
• and
• means adapted to operatively associate said first and second electrode means with an electronic conductivity measuring circuit.

A blood sample carrier for use in electrically measuring a parameter of a blood sample, said carrier comprising:

• a planar base portion;
• a hollow tube having an interior surface that defines a capillary tube on said base;
• first and second electrodes disposed on a portion of said interior surface in a spaced relationship;
• a measurement cell defined by said interior surface and said first and second electrodes, said measurement cell segregating a predetermined volume of said blood sample being measured;
• and
• pad means, on said base, adpatd for electrically associating said first and second electrodes with a blood parameter measuring device.

A method of making a disposable liquid sample carrier comprising the steps of:

• forming a portion of a base member into a portion of the interior surface of a capillary tube;
• providing an overlay having a surface;
• positioning and securing two electrodes in a spaced relationship on said surface of said overlay;
• and
• positioning and securing said overlay to said base member so that said surface of said overlay completes the interior surface of said capillary tube and so that said two electrodes along with the interior surface of said capillary tube segregates a volume constituting a measurement cell.