Occuludable introducer needle
An introducer needle assembly including a compressible section between the rigid needle and the hub. Once the vessel is entered as determined by blood entering the syringe, the compressible section of the introducer needle is occluded by compressing the section with the thumb and a finger. Neither blood nor air can pass. Since the compressible section is in a flattened area it is easier to hold the needle while the syringe is unscrewed. The operator then can begin threading a guidewire down the device which is now easier to enter because blood is not coming out of the hub thus obscuring the lumen.
1. An introducer needle assembly comprising:
a hollow needle with a needle passage extending from a needle distal end to a needle proximal end;
a hub extending from a hub distal end to a hub proximal end with the hub distal end secured to the needle proximal end, the hub including a needle connector at the hub distal end and a device connector at the hub proximal end with a pair of spaced apart rails interconnecting the needle connector and the device connector with a hollow space defined between the rails; a first passage defined from the needle connector through a first post extending proximally of the needle connector, the first passage in communication with the needle passage, and a second passage extending from the device connector through a second post extending distally of the device connector; and
a compressible member having a tubular body having a third passage extending between the ends of the compressible member, the compressible member is in the hollow space and is secured on the first and second posts such that a continuous passage is defined through the second passage, the third passage, the first passage and the needle passage and wherein the third passage has an inner diameter equal to or less than an inner diameter at a proximal end of the first passage; wherein the compressible member can be compressed to occlude the third passage to block fluid communication.
2. The introducer needle assembly according to claim 1 wherein the hub has a configuration extending between the rails and that can be grasped to prevent rotation.
3. The introducer needle assembly according to claim 2 wherein opposed sides of the tubular body have indentations defined therein with a compression pad defined in the center of each indentation.
4. The introducer needle assembly according to claim 3 wherein the compression pads extend parallel with a plane between the side rails.
5. The introducer needle assembly according to claim 3 wherein the compression pads define an outer diameter which is larger than a width of a central portion of each side rail.
6. The introducer needle assembly according to claim 1 wherein the compressible member defines a central outer diameter which is larger than a width of a central portion of each rail of the pair of spaced apart rails.
7. The introducer needle assembly according to claim 1 wherein the hub has a generally rigid body.
8. The introducer needle assembly according to claim 1 wherein the compressible member is manufactured from an elastic material.
9. The introducer needle assembly according to claim 1 wherein the device connector includes at least one external thread.
10. The introducer needle assembly according to claim 1 wherein the first and second posts each include at least one outwardly extending barb.
11. The introducer needle assembly according to claim 1 wherein the second passage includes a large opening at the proximal end of the hub and tapers to a narrower bore through the second post.
12. The introducer needle assembly according to claim 11 wherein the narrower bore has an inside diameter approximately equal to the inner diameter at the proximal end of the first passage.
13. The introducer needle assembly according to claim 1 wherein the inner diameter at the proximal end of the first passage is approximately equal to an inner diameter of the needle passage.
14. The introducer needle assembly according to claim 1 wherein the inner diameter at the proximal end of the first passage is larger than an inner diameter of the needle passage and the first passage includes a tapered portion distal of the proximal end.
15. A method of inserting a needle into a blood vessel comprising the steps of: inserting the needle of the introducer needle assembly of claim 1 into the blood vessel; observing blood entering a syringe attached to the device connector; compressing the compressible member to occlude the third passage; removing the syringe from the device connector; and inserting a guide wire through the second passage, the third passage, the first passage and the needle passage and into the blood vessel.
16. The method of claim 15 wherein the compressing step is achieved utilizing opposed first and second fingers of a user extending across at least one of the side rails and the compressible member.
17. The method of claim 16 wherein the removing step includes unscrewing the syringe from the device connector and the position of the opposed first and second fingers of the user relative to the side rails prevents rotation of the hub during unscrewing.
18. The method of claim 15 wherein the compressing step and the removing step are performed substantially simultaneously.