VIAL HOLDER

1 . A vial holder for a vial, wherein the vial includes a body portion having a generally tubular portion interposed between a bottom and a shoulder portion, the vial further including a neck portion, wherein the neck portion interconnects the shoulder portion to a head portion, a cap portion is connected to the head portion, and wherein the cap portion includes a membrane for retaining a fluid within the vial, the vial holder comprising:

a restraining portion for, at least in part, restraining the vial from moving in a first direction;

an urging member for resisting a force exerted in a second direction on the vial when a needle is urged to pierce the membrane; and

wherein the first direction is generally opposite the second direction.

2 . The apparatus of claim 1 , wherein the restraining portion will restrain the vial from movement in the second direction.

3 . The apparatus of claim 1 , wherein the restraining portion at least partially encircles the neck portion of the vial.

4 . The apparatus of claim 1 , wherein the restraining portion exerts a first biasing force on the vial in the first direction and a second biasing force on the vial in a third direction, where the third direction is generally perpendicular to the first direction.

5 . The apparatus of claim 4 . wherein the restraining portion contacts a portion of the tubular body portion of the vial.

6 . The apparatus of claim 1 , further comprising a biasing member for urging at least a portion of the urging member to move in the first direction.

7 . The apparatus of claim 6 , wherein the biasing member exerts a linear urging force on the urging member.

8 . The apparatus of claim 6 , wherein the urging member selectively contacts the bottom of the vial.

9 . The apparatus of claim 8 , wherein the vial holder selectively retains a first vial having a first height, measured from the bottom to the neck.

10 . The apparatus of claim 1 , further comprising an agitator for selectively mixing the contents of the vial.

11 . A method of retaining a vial within a vial holder, wherein the vial includes a body portion having a generally tubular portion interposed between a bottom and a neck portion, wherein the neck portion interconnects the body portion to a head portion, a cap portion is connected to the head portion, and wherein the cap portion includes a membrane, the method comprising:

positioning the neck portion of the vial at least partially within a first restraining portion of the vial holder;

positioning an urging portion of the vial holder in contact with the bottom of the vial;

piercing the membrane with a needle with a first force directed generally in a first direction; and

resisting at least a portion of the first force with the urging portion.

12 . The method of claim 11 , wherein only a portion of the first force is resisted by the urging portion.

13 . The method of claim 11 , further comprising gripping the outer surface of the tubular portion with a gripping portion of the vial holder to axially restrain the vial relative to the vial holder.

14 . The method of claim 11 , further comprising positioning the shoulder of the vial in contact with the vial holder.

15 . The method of claim 11 , further comprising resisting at least a portion of the first force with the first restraining portion.

16 . The method of claim 11 , further comprising mixing at least a portion of the contents of the vial with an agitator.

17 . The method of claim 16 , wherein mixing at least a portion of the contents of the vial includes exciting vibrations in the contents of the vial through the body portion of the vial with an ultrasonic generator.

18 . A method of retaining a vial within a vial holder, wherein the vial includes a body portion having a generally tubular portion interposed between a bottom and a neck portion, wherein the neck portion interconnects the body portion to a head portion, a cap portion is connected to the head portion, and wherein the cap portion includes a membrane, the method comprising:

positioning the body portion of the vial at least partially within a first restraining portion of the vial holder;

positioning an urging portion of the vial holder in contact with the bottom of the vial;

piercing the membrane with a needle with a first force directed generally in a first direction; and

resisting at least a portion of the first force with the urging portion

19 . The method of claim 18 , further comprising mixing at least a portion of the contents of the vial with an agitator.

20 . The method of claim 19 , wherein the agitator includes an ultrasonic generator that excites vibrations in the contents of the vial through the body portion of the vial.