Extravascular system in-line venting

1. A medical device, comprising:

a closed extravascular system, wherein the system includes a fluid path through a intravenous tube; and

a gas vent in communication with the fluid path, the gas vent venting gas from the intravenous tube, the gas vent being disposed directly on one of:

a) the intravenous tube, wherein the gas vent protrudes out from the intravenous tube; and

b) a port directly connected to the intravenous tube, the port having a body with the fluid path extending therethrough, a septum coupled to the body providing selective access to the fluid path, a gas vent in communication with the fluid path extending through the port;

wherein the closed extravascular system remains closed after gas vents from the fluid path through the gas vent.

2. The medical device of claim 1 , wherein the gas vent includes a venting material and a user-activated rotation valve.

3. The medical device of claim 1 , wherein the gas vent includes a user-activated seal with a pull tab.

4. The medical device of claim 1 , wherein the gas vent includes at least two layers of fluid seal material separated by a layer of gas.

5. The medical device of claim 1 , wherein the gas vent includes a removable filter plug and a reseal elastomer.

6. The medical device of claim 1 , wherein the gas vent includes a cannula and a cartridge seal.

7. The medical device of claim 1 , wherein the gas vent includes:

a cannula with a first end and a second end,

a venting material secured to the first end of the cannula,

a push shaft with a first end and a second end, and

a septum secured to the second end of the push shaft and in moveable contact with the second end of the cannula.

8. The medical device of claim 1 , wherein the gas vent includes a narrow vent hole and a floatable structure, wherein the floatable structure is in the fluid path and in communication with the narrow vent hole.

9. The medical device of claim 1 , wherein the gas vent includes a narrow vent hole and a heavy structure capable of sinking in liquid, wherein the heavy structure is in the fluid path and in communication with the narrow vent hole.

10. The medical device of claim 1 , wherein the gas vent includes a spring-loaded sealing member.

11. The medical device of claim 1 , wherein the gas vent includes a sealing member that expands when the sealing member comes into contact with liquid.

12. The medical device of claim 1 , wherein the gas vent includes a check valve.

13. The medical device of claim 1 , wherein the gas vent is in direct communication with the fluid path.

14. The medical device of claim 1 , wherein the gas vent includes a moisture-cure material.

15. The medical device of claim 1 , wherein the gas vent includes a porous membrane.

16. The medical device of claim 1 , wherein the gas vent includes

an expandable vent material,

a cannula with a first end and a second end, and

a septum in communication with the second end of the cannula,

wherein the first end of the cannula is anchored within the expandable vent material,

wherein the vent material is capable of expanding and drawing the second end of the cannula through the septum when the vent material is exposed to liquid.

17. A method of venting a medical device, comprising:

providing a closed extravascular system, wherein the extravascular system includes a fluid path through an intravenous tube;

providing a gas vent in communication with the fluid path, the gas vent being disposed directly on one of:

a) the intravenous tube, wherein the gas vent protrudes out from the intravenous tube; and

b) a port directly connected to the intravenous tube, the port having a body with the fluid path extending therethrough, a septum coupled to the body providing selective access to the fluid path, a gas vent in communication with the fluid path extending through the port;

venting gas from the intravenous tube through the gas vent; and

maintaining a closed extravascular system during and after venting.

18. The method of claim 17 , further comprising closing the gas vent upon user-activation of the gas vent.

19. The method of claim 17 , further comprising saturating a first layer of venting material with liquid.

20. The method of claim 17 , further comprising removing the gas vent after venting.

21. The method of claim 17 , further comprising closing the gas vent with a floatable structure.

22. The method of claim 17 , further comprising closing the gas vent with a heavy structure.

23. The method of claim 17 , further comprising closing the gas vent with a spring-loaded sealing member.

24. The method of claim 17 , further comprising closing the gas vent with an expandable sealing member.

25. The method of claim 17 , wherein providing a gas vent in communication with the fluid path includes providing the gas vent in direct communication with the fluid path.

26. The method of claim 17 , further comprising curing a material to form a seal.

27. The method of claim 17 , wherein the gas vent includes an expandable vent material, a cannula with a first end and a second end, and a septum in communication with the second end of the cannula;

further comprising:

anchoring the first end of the cannula within the expandable vent material;

expanding the vent material; and

drawing the second end of the cannula through the septum as the vent material expands.

28. A medical device, comprising:

means for providing access to the vascular system of a patient, wherein the means for providing access includes a fluid path; and

means for venting the means for providing access, wherein the means for venting communicates with the fluid path, the means for venting the means for providing access being disposed directly on one of:

a) the intravenous tube, wherein the gas vent protrudes out from the intravenous tube; and

b) a port directly connected to the intravenous tube, the port having a body with the fluid path extending therethrough, a septum coupled to the body providing selective access to the fluid path, a gas vent in communication with the fluid path extending through the port.