Sample site with flow directors

• US 5,221,271 A
• Filed: 08/15/1991
• Issued: 06/22/1993
• Est. Priority Date: 08/15/1991
• Status: Expired due to Term

• Current Assignee: Medex Incorporated (Smiths Group International Holdings Ltd.)
• Original Assignee: Medex Incorporated (Smiths Group International Holdings Ltd.)
• Inventors: Nicholson, Warren B., Brunner, Glenn D.
• Primary Examiner(s): Rosenbaum, C. Fred
• Assistant Examiner(s): MENDEZ, MANUEL A
• Application Number:
  US07/746,239
• Time in Patent Office: 677 Days
• Field of Search: 604/283, 604/905, 604/240-243, 604/80, 604/83, 604/140-141, 604/256, 604/257, 137/896, 137/808, 137/809, 137/811
• US Class Current: 604/539
• CPC Class Codes: A61M 39/04 having pierceable self-sealing members
• CPC Class Codes: Y10S 604/905 Aseptic connectors or couplings, e.g. frangible, piercable

Abstract

A sample site for obtaining a whole blood sample includes flow directors in the ports. The flow directors may include ramp surfaces. Blood flowing into the sample site is diverted by the flow directors to mix with and flush out all of the saline otherwise present in the sample site to allow for a whole blood sample to be taken.

Claims

1. A sample site comprising:

a housing having a cavity therein;

seal means for selectively accessing fluid in the cavity;

A pair of ports connected to the housing and in fluid communication with the cavity; and

flow director means in the ports for creating non-laminar flow of fluid in the cavity from one of the ports to the other port.

2. The sample site of claim 1, the ports being oppositely disposed along a common axis.

3. The sample site of claim 1, the flow director means including a ramp in at least one of the ports adjacent the cavity.

4. The sample site of claim 1, the flow director means including a ramp in each of the ports adjacent the cavity.

5. The sample site of claim 4, the ramps being rotated 180°

relative each other.

6. The sample site of claim 1, the flow director means being positioned in the ports such that they are rotated 180°

relative each other.

7. A sample site comprising:

a housing having a cavity therein;

seal means for selectively accessing fluid in the cavity;

a pair of ports connected to opposite sides of the housing, the ports being in fluid communication with the cavity through an inlet in each of the ports; and

a first flow director within a first of the ports whereby to diver fluid entering the cavity through the port from flowing along a direct line from the inlet of one of the ports to the inlet of the other port

8. The sample site of claim 7, the first flow director including a ramp surface extending away from the interior wall of the first port and towards the cavity.

9. The sample site of claim 8 wherein the ramp surface extends to the cavity so as to define a semicircular cross-section to the inlet of the first port.

10. The sample site of claim 8 wherein the ramp surface is flat.

11. The sample site of claim 7 further comprising:

a second flow director within a second of the ports whereby to divert fluid entering the cavity through that port from flowing along a direct line between the inlets.

12. The sample site of claim 11, the flow directors each including a ramp surface extending away from the interior wall of the associated port and towards the cavity.

13. A sample site comprising:

a housing having a cavity therein;

seal means for selectively accessing fluid in the cavity;

a pair of ports connected to opposite sides of the housing along a common axis, the ports being in fluid communication with the cavity through inlets in the ports; and

a first ramp surface within a first of the ports adjacent the inlet thereof to produce a flow from one of the ports to the other port.

14. The sample site of claim 13, the ramp surface being connected to the interior wall of the first port at a location spaced from the inlet thereof.

15. The sample site of claim 14 wherein the ramp surface extends to the cavity so as to define a semicircular cross-section to the inlet of the first port.

16. The sample site of claim 13 further comprising a second ramp surface within a second of the ports adjacent the inlet thereof.

17. The sample site of claim 16, each ramp surface being connected to the interior wall of the associated port at a location spaced from the inlet thereof.

18. The sample site of claim 16 wherein each ramp surface extends to the cavity so as to define a semicircular cross-section to the inlet of the associated port.

19. The sample site of claim 16, each of the ramp surfaces being aimed in a different direction.

20. The sample site of claim 16, the ramp surfaces being rotated 180°

relative each other.