Biological liquid collection vessels, systems, and methods

A biological liquid collection vessel, comprising:

• an inner liner having an upper end that is open and a lower end that is closed, a continuous inner wall extending from the upper end to the lower end that maintains a same shape, size, and volume capacity with and without a serum, plasma, or red blood cell portion in contact therewith, and a target area and a solids area;
• and
• an outer sleeve;
• wherein:
• the target area has a first average transverse dimension and is open at the upper end and is adapted to contain a serum or plasma portion, the continuous inner wall having an inner transverse dimension that continuously varies along its length in the target area;
• and
• the solids area is connected to and adjacent the target area, has a second average transverse dimension larger than the first average transverse dimension, is closed at the lower end, and is adapted to contain a red blood cell portion.

A biological liquid collection vessel containing a centrifuged biological liquid, comprising:

• an inner liner having an upper end that is open and a lower end that is closed, a single-piece, continuous inner wall extending from the upper end to the lower end that maintains a same shape, size, and volume capacity with and without the centrifuged biological liquid in contact therewith, and a target area and a solids area;
• and
• an outer sleeve;
• wherein:
• the target area is open at the upper end and has a continuously varying inner transverse dimension,
• the solids area is connected to and adjacent the target area and closed at the lower end, and
• volume capacities of both of the target area and the solids area are positioned so that a red blood cell portion of the centrifuged biological liquid is substantially contained in the solids area, and a serum or plasma portion of the centrifuged biological liquid is substantially contained in the target area.

A biological liquid collection vessel, comprising:

• an inner liner comprising:
• an open upper end;
• a closed bottom end;
• a cap-receiving portion proximate the open upper end;
• a target area having a constant first transverse dimension located proximate the cap-receiving portion;
• and
• a solids area connected to and adjacent the target area, having a second transverse dimension larger than the constant first transverse dimension, and extending to the closed bottom end;
• and
• a continuous, single-piece inner wall of a constant thickness extending from the open upper end to the closed bottom end that maintains a same shape, size, and volume capacity with and without serum or plasma or red blood cells in contact therewith;
• and
• an outer sleeve.