A sealed package 2 comprises a plurality of cavities containing medical device components relating to an arterial blood gas ABG sample collection procedure. The plurality of cavities define a closed base and an open top of package 2. The plurality of cavities comprises: a first cavity 4 containing a syringe 16 or blood collection tube a second cavity 6 containing a needle hub 18 comprising a needle and removable sheath and a third cavity 10 containing a vented tip cap 22. Package 2 further comprises a removable backing that both covers and seals the open top of the package 2. First cavity 4 may comprise: a fulcrum defined as a contact point between the syringe or blood collection tube and a wall of the cavity 4, the fulcrum being positioned so that a predefined centre of mass of the syringe/blood-collection-tube is forward of fulcrum, so that the syringe/blood-collection-tube tends to pivot forward into a stable position and a pocket formed in first cavity 4 that extends forward of, and below the fulcrum to receive a front end of the syringe or blood collection tube when free to pivot into the stable position.
