CATHETER ASSEMBLY AND PIERCED SEPTUM VALVE

• US 20120016301A1
• Filed: 03/07/2011
• Published: 01/19/2012
• Est. Priority Date: 07/15/2010
• Status: Active Grant

• Current Assignee: Becton, Dickinson & Co
• Original Assignee: Becton, Dickinson & Co
• Inventors: Stout, Marty L.
• Granted Patent: US 8,361,020 B2
• Time in Patent Office: Days
• US Class Current: 604/122
• CPC Class Codes: A61M 2039/062 used with a catheter
• CPC Class Codes: A61M 2039/0633 the seal being a passive seal made of a resilient material with or without an opening
• CPC Class Codes: A61M 2039/064 Slit-valve
• CPC Class Codes: A61M 25/0606 "Over-the-needle" catheter assemblies, e.g. I.V. catheters
• CPC Class Codes: A61M 25/0693 Flashback chambers
• CPC Class Codes: A61M 39/045 pre-slit to be pierced by blunt instrument
• CPC Class Codes: A61M 39/0606 without means for adjusting the seal opening or pressure A61M39/0693 takes precedence
• CPC Class Codes: A61M 39/0693 including means for seal penetration

Abstract

A pierced septum valve is disclosed herein. The pierced septum valve includes a septum that is located within a lumen of a body. A septum activator is positioned proximal the septum within the lumen of the body. A seal is disposed between an outer surface of the septum activator and the body to seal the portion of the septum activator distal the lumen from the portion of the septum activator proximal the lumen. One or more vents are disposed between the seal and the lumen of the body to permits the passage of air but not blood past the seal.

Claims

1. A pierced septum valve comprising:

a septum disposed within a lumen of a body;

a septum activator disposed proximal the septum within the lumen of the body;

a seal disposed between an outer surface of the septum activator and the body, the seal sealing a portion of the septum activator distal the seal from a portion of the septum activator proximal the seal; and

one or more vents disposed between the seal and the lumen of the body, the one or more vents each having a cross sectional area that permits the passage of air but not blood.

2. The pierced septum valve of claim 1, wherein the cross sectional area of each vent is between 0.0001 to 0.0003 inches².

3. The pierced septum valve of claim 2, wherein the one or more vents includes six or more vents.

4. The pierced septum valve of claim 3, wherein the seal encircles the septum activator.

5. The pierced septum valve of claim 1, wherein the one or more vents are formed in the exterior of the seal.

6. The pierced septum valve of claim 1, wherein the one or more vents are formed through the seal.

7. The pierced septum valve of claim 1, wherein the one or more vents are channels formed in the body.

8. The pierced septum valve of claim 1, wherein the body is a catheter adapter and the lumen of the body extends through the catheter adapter.

9. The pierced septum valve of claim 1, wherein the seal has an outer diameter greater than or equal to an inner diameter of the lumen.

10. The pierced septum valve of claim 1, wherein the seal includes an elastomeric material.

11. The pierced septum valve of claim 1, wherein the seal is disposed about a proximal portion of the septum activator.

12. A catheter assembly comprising:

a catheter adapter having a lumen extending therethrough;

a septum disposed within the lumen;

one or more flow restrictors disposed between the septum and the catheter adapter;

a septum activator disposed within the lumen proximal the septum;

a seal disposed between an outer surface of the septum activator and the catheter adapter, the seal sealing a portion of the septum activator distal the seal from a portion of the septum activator proximal the seal; and

one or more vents disposed between the seal and the lumen of the body.

13. The catheter assembly of claim 12, wherein the one or more vents disposed between the seal and the lumen of the body each have a cross sectional area between 0.0001 to 0.0003 inches².

14. The catheter assembly of claim 12, wherein the one or more flow restrictors include one or more openings each having a cross sectional area of greater than 0.0003 inches².

15. The catheter assembly of claim 12, wherein the volume exterior the septum activator between the septum and the seal forms a flashback chamber.

16. The catheter assembly of claim 12, wherein the septum activator has a substantially tubular-shaped body with a lumen extending therethrough.

17. The catheter assembly of claim 16, wherein the seal has an outer diameter greater than or equal to an inner diameter of the lumen at the locations.

18. The catheter assembly of claim 17, wherein the seal is disposed about a proximal portion of the septum activator.

19. The catheter assembly of claim 18, wherein the seal includes an elastomeric material.

20. A catheter assembly comprising:

a catheter adapter having a lumen extending therethrough;

a septum disposed within the lumen;

one or more flow restrictor channels disposed between the septum and the catheter adapter, the cross sectional area of the vents being greater than 0.0003 inches²;

a septum activator disposed within the lumen proximal the septum, the septum activator having a substantially tubular-shaped body;

an annular seal disposed between an outer surface of the septum activator and an inner surface of the lumen, the seal being disposed about a proximal portion of the septum activator; and

one or more vents disposed between the seal and the lumen of the body, the one or more vents each having a cross sectional area between 0.0001 to 0.0003 inches² and each permit the passage of air but not blood.