Expanding needle device and method of expansion for the transfer of fluids
View Patent ↗An expanding needle is provided that includes a tubular body having a proximal end, a needle-tipped distal end, and a lumen extending therebetween. The expanding needle also includes a longitudinal seam formed on the tubular body. The tubular body is configured to uncurl radially, along the longitudinal seam, thereby transitioning the tubular body from a contracted state to an expanded state to increase an inner diameter of the lumen. In certain embodiments, the tubular body is formed by, for example, a continuous flexible sheet rolled in a lengthwise direction. In that case, the longitudinal seam is defined by a portion of a side of the flexible sheet overlapping an opposing side of the flexible sheet. An expanding needle device, including an expanding needle seated to a needle hub, and a method of increasing an inner diameter of an expanding needle are also provided herein.
1. An expanding needle comprising:
a tubular body comprising a proximal end, a distal end comprising a needle tip, and a lumen extending therebetween for expelling fluid from and/or drawing fluid into the tubular body and through the lumen; and
a longitudinal seam formed in the tubular body,
wherein the tubular body is biased to uncurl radially along the longitudinal seam upon exposure to an activating condition, thereby transitioning the tubular body from a contracted state to an expanded state to increase an inner diameter of the lumen, thereby increasing fluid flow rate through the lumen,
wherein the tubular body comprises a shape memory material, and
wherein the activating condition comprises applying at least one of heat, infrared radiation, sound frequencies, electric charge, and radiofrequency signals to the tubular body.
2. The expanding needle of claim 1 , wherein the tubular body comprises a flexible sheet rolled in a lengthwise direction, and wherein the longitudinal seam is defined by a portion of a side of the flexible sheet overlapping an opposing side of the flexible sheet.
3. The expanding needle of claim 1 , wherein an area of overlap of the longitudinal seam is reduced or eliminated when the tubular body transitions from the contracted state to the expanded state.
4. The expanding needle of claim 1 , wherein the needle tip of the tubular body comprises a piercing or intravenous needle tip.
5. The expanding needle of claim 1 , wherein the tubular body is narrower than 16 gauge when in the contracted state and wider than 14 gauge in the expanded state.
6. The expanding needle of claim 1 , wherein the proximal end of the tubular body comprises a flange extending radially therefrom.
7. The expanding needle of claim 1 , further comprising a cover surrounding the tubular body, wherein the tubular body comprises an expandable mesh enclosed by the cover.
8. The expanding needle of claim 1 , wherein a cross-sectional area of the tubular body in the contracted state is less than a cross-sectional area of the tubular body in the expanded state, along an entire length of the tubular body.
9. The expanding needle of claim 1 , wherein the cross-sectional area of the tubular body increases by the same amount along the entire length of the tubular body during transition of the tubular body from the contracted state to the expanded state.
10. The expanding needle of claim 1 , wherein the longitudinal seam defines at least a portion of a venting lumen extending between the proximal end and the distal end of the tubular body when the tubular body is in the contracted state, the venting lumen being separate from the lumen of the tubular body.
11. An expanding needle device, comprising:
an expanding needle comprising:
a tubular body comprising a proximal end, a distal end comprising a needle tip, and a lumen extending therebetween for expelling fluid from and/or drawing fluid into the tubular body and through the lumen; and
a longitudinal seam formed in the tubular body; and
a needle hub supporting at least a portion of the proximal end of the tubular body,
wherein the tubular body is biased to uncurl radially along the longitudinal seam upon exposure to an activating condition, thereby transitioning the tubular body from a contracted state to an expanded state to increase an inner diameter of the lumen, thereby increasing fluid flow rate through the lumen,
wherein the tubular body comprises a shape memory material, and
wherein the activating condition comprises applying at least one of heat, infrared radiation, sound frequencies, electric charge, and radiofrequency signals to the tubular body.
12. The expanding needle device of claim 11 , wherein the needle tip of the tubular body comprises a piercing or intravenous needle tip.
13. The expanding needle device of claim 11 , wherein the proximal end of the tubular body comprises a flange seated against a portion of the needle hub.
14. The expanding needle device of claim 13 , wherein the portion of the hub that contacts the flange biases the expanding needle in a distal direction toward a distal end of the hub.
15. The expanding needle device of claim 14 , wherein the portion of the hub that contacts the flange comprises a lubricious pad.
16. The expanding needle device of claim 15 , wherein the needle hub comprises an expandable annular seal disposed about the tubular body of the expanding needle that forms a seal between the expanding needle and an interior of the needle hub.
17. A syringe comprising:
a syringe barrel defining an interior volume; and
an expanding needle connected to the syringe barrel, the expanding needle comprising:
a tubular body comprising a proximal end, a distal end comprising a needle tip, and a lumen extending therebetween, the lumen being in fluid communication with and configured to draw fluid into and/or expel fluid from the interior of the syringe barrel;
a longitudinal seam formed in the tubular body; and
a plunger disposed in the syringe barrel, wherein advancing the plunger distally through the syringe barrel expels fluid from the syringe barrel and through the lumen of the expanding needle, and wherein retracting the plunger draws fluid into the syringe barrel,
wherein the tubular body is biased to uncurl radially along the longitudinal seam upon exposure to an activating condition, thereby transitioning the tubular body from a contracted state to an expanded state to increase an inner diameter of the lumen, thereby increasing fluid flow rate through the lumen.
18. The syringe of claim 17 , wherein the tubular body of the expanding needle comprises a flexible sheet rolled in a lengthwise direction, and wherein the longitudinal seam is defined by a portion of a side of the flexible sheet overlapping an opposing side of the flexible sheet.
19. The syringe of claim 17 , wherein the needle tip of the tubular body comprises a piercing or intravenous needle tip.
20. The syringe of claim 17 , wherein the tubular body comprises a shape memory material, and wherein the activating condition comprises applying at least one of heat, infrared radiation, sound frequencies, electric charge, and radiofrequency signals to the tubular body.
21. The syringe of claim 17 , wherein the longitudinal seam of the expanding needle defines at least a portion of a venting lumen extending between the proximal end and the distal end of the tubular body when the tubular body is in the contracted state, the venting lumen being separate from the lumen of the tubular body.
22. The syringe of claim 17 , further comprising a needle hub connected to the syringe barrel and supporting the expanding needle, wherein the proximal end of the tubular body of the expanding needle comprises a flange seated against a portion of the needle hub.
23. The expanding needle device of claim 22 , wherein the portion of the hub that contacts the flange comprises a lubricious pad.