Needle system restrictor
A needle system a handle and a needle slider partially positioned in the handle. The needle slider has an aspiration port at a proximal end of the needle slider. A needle connected to and extending away from the needle slider. A restrictor is disposed in the aspiration port of the needle slider. The restrictor is configured to inhibit passage of a sample through the aspiration port.
1. A needle system comprising:
a handle;
a needle slider partially positioned in the handle, the needle slider having an aspiration port at a proximal end of the needle slider and an internal lumen extending therethrough;
a needle connected to and extending away from the needle slider; and
a restrictor disposed in the aspiration port of the needle slider and extending distally into the internal lumen of the needle slider, the restrictor being configured to inhibit passage of a sample through the aspiration port, wherein the restrictor comprises:
a hollow body with a proximal end having a proximal opening and a distal end having a distal opening; and
a rim extending from the proximal end of the body having a radial flange portion and a circumferential lip portion, wherein the rim of the restrictor is positioned around an outer diameter of the aspiration port of the needle slider.
2. The needle system of claim 1 , wherein the restrictor is made of a flexible material.
3. The needle system of claim 1 , wherein the restrictor permits fluid flow through the restrictor, and inhibits solid material from moving into the restrictor.
4. The needle system of claim 1 , and further comprising:
a syringe connected to the aspiration port of the needle slider, wherein the restrictor forms a seal between the needle system and the syringe.
5. The needle system of claim 1 , wherein a diameter of the proximal opening of the hollow body is larger than a diameter of the distal opening of the hollow body.
6. The needle system of claim 1 , wherein the hollow body comprises:
a frustoconical portion with a proximal end aligned with the proximal end of the hollow body and a distal end; and
a cylindrical portion with a proximal end extending from the distal end of the frustoconical portion and a distal end aligned with the distal end of the hollow body.
7. The needle system of claim 1 , and further comprising:
one or more ribs extending from the hollow body.
8. The needle system of claim 7 , wherein there is a slit cut through the hollow body and into an interior of one of the ribs.
9. The needle system of claim 1 , and further comprising:
a plate extending around the distal end of the hollow body.
10. The needle system of claim 1 , and further comprising:
a hole extending through the hollow body.
11. The needle system of claim 1 , and further comprising:
a sheath connected to and extending away from the handle, wherein the needle is positioned in and movable in the sheath; and
a stylet extending through the needle, wherein the stylet is positioned in an interior of the hollow body of the restrictor and deforms the restrictor.
12. The needle system of claim 1 , wherein the needle slider is movable in the handle and further comprises:
a grip; and
a shaft that is movable in the handle.
13. A restrictor comprising:
a hollow body with a proximal end having a proximal opening and a distal end having a distal opening, wherein the hollow body is configured to fit into an aspiration port of a needle slider and comprises:
a frustoconical portion with a proximal end aligned with the proximal end of the hollow body and a distal end; and
cylindrical portion with a proximal end extending from the distal end of the frustoconical portion and a distal end aligned with the distal end of the hollow body; and
a rim extending from the proximal end of the body, wherein the rim is configured to form a seal between a syringe and the needle slider at the aspiration port and comprises:
a radial flange portion with a proximal end aligned with a proximal end of the rim and a distal end; and
a circumferential lip portion with a proximal end extending from the distal end of the radial flange portion and a distal end aligned with a distal end of the rim.
14. The restrictor of claim 13 , wherein an inner diameter of the radial flange portion of the rim extends from an outer diameter of the frustoconical portion of the hollow body, and wherein a groove is defined by the hollow body, the radial flange portion of the rim, and the circumferential lip portion of the rim.
15. A needle system comprising:
a handle;
a needle slider partially positioned in the handle, the needle slider having an aspiration port at a proximal end of the needle slider and an internal lumen extending therethrough;
a needle connected to and extending away from the needle slider; and
a restrictor disposed in the aspiration port of the needle slider and extending distally into the internal lumen of the needle slider, the restrictor being configured to inhibit passage of a sample through the aspiration port, wherein the restrictor comprises:
a hollow body with a proximal end having a proximal opening and a distal end having a distal opening, wherein the hollow body comprises:
a frustoconical portion with a proximal end aligned with the proximal end of the hollow body and a distal end; and
a cylindrical portion with a proximal end extending from the distal end of the frustoconical portion and a distal end aligned with the distal end of the hollow body; and
a rim extending from the proximal end of the body having a radial flange portion and a circumferential lip portion.