Blood collection tube holder with discharge needle displacement member
A medical device configured as a blood collection tube holder, the device having a body with two spaced-apart, oppositely facing, coaxially aligned needles including a forwardly facing venipuncture needle and a rearwardly facing fluid discharge needle, the two needles being held by first and second needle holders separated by a compressible fluid seal defining part of a fluid path between the two needles and the two needle holders. The body also includes a discharge needle displacement member that is manually repositioned following removal of the last blood tube holder so that the discharge needle displacement member contacts the second needle holder and displaces the second needle holder and the fluid discharge needle laterally inside the body to initiate retraction of the venipuncture needle into a rearwardly projecting needle retraction chamber.
1. A blood collection tube holder configured for use with a stoppered blood collection tube to draw and collect blood, the blood collection tube holder comprising:
a molded plastic body having front wall sections, a body wall extending rearward from the front wall sections, an elongate opening disposed between longitudinally extending wings disposed on the body wall, a cylindrical cavity inside the body, and a rearwardly facing opening surrounded by an outwardly projecting, laterally extending rear flange disposed on the body wall;
two spaced-apart, oppositely facing, coaxially aligned needles held inside the body, wherein the first needle is a forwardly projecting venipuncture needle held by a rearwardly biased needle holder and the second needle is a rearwardly facing fluid discharge needle held by a second needle holder; and
a discharge needle displacement member slidably engaging the body and further comprising a rearwardly projecting needle retraction chamber and a touch surface,
wherein the discharge needle displacement member is selectively repositionable, following use of the blood collection tube holder to draw and collect blood, in a direction transverse to a fluid flow path through the blood collection tube holder by an application of manual pressure to the touch surface to displace the fluid discharge needle laterally relative to the venipuncture needle and to coaxially align the rearwardly biased needle holder with the needle retraction chamber to initiate retraction of the venipuncture needle;
wherein the needle retraction chamber comprises a rearwardly facing closed end, and
wherein the laterally extending flange and the closed end of the needle retraction chamber are cooperatively configured to be releasably engageable with each other prior to and during use of the blood collection tube holder to draw and collect blood.
2. The blood collection tube holder of claim 1 wherein the closed end of the needle retraction chamber releasably engages the laterally extending flange.
3. The blood collection tube holder of claim 2 wherein the closed end of the needle retraction chamber comprises a rearwardly facing projection that releasably engages a cooperatively sized and aligned aperture in the laterally extending flange.